WO2021221042A1 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- WO2021221042A1 WO2021221042A1 PCT/JP2021/016736 JP2021016736W WO2021221042A1 WO 2021221042 A1 WO2021221042 A1 WO 2021221042A1 JP 2021016736 W JP2021016736 W JP 2021016736W WO 2021221042 A1 WO2021221042 A1 WO 2021221042A1
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- semiconductor device
- switching element
- source
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- H10W40/00—
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
- H10D84/80—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups H10D12/00 or H10D30/00, e.g. integration of IGFETs
- H10D84/811—Combinations of field-effect devices and one or more diodes, capacitors or resistors
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- H10W40/255—
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- H10W70/481—
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- H10W90/00—
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/64—Double-diffused metal-oxide semiconductor [DMOS] FETs
- H10D30/66—Vertical DMOS [VDMOS] FETs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
- H10D62/83—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge
- H10D62/832—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge being Group IV materials comprising two or more elements, e.g. SiGe
- H10D62/8325—Silicon carbide
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- H10W70/465—
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- H10W72/536—
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- H10W72/5363—
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- H10W72/5475—
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- H10W72/884—
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- H10W72/926—
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- H10W74/00—
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- H10W90/701—
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- H10W90/734—
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- H10W90/736—
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- H10W90/756—
Definitions
- This disclosure relates to semiconductor devices.
- Patent Document 1 discloses an example of a switching device (semiconductor device) including a switching element such as a MOSFET.
- the switching element has a drain electrode, a gate electrode and a source electrode.
- the semiconductor device disclosed in the document includes three terminals (gate terminal, source terminal and drain terminal).
- the gate terminal is a terminal for inputting an electric signal to the gate electrode. The current converted based on the electric signal flows from the source electrode to the outside through the source terminal, and the current converted based on the electric signal flows toward the drain electrode via the drain terminal.
- the junction temperature can be measured by using the body diode inside the switching element and the thermal resistance measuring instrument. For example, when a thermal resistance measuring instrument is used, after the application of the driving voltage to the switching element is completed, a current is passed through the body diode to measure the voltage with the thermal resistance measuring instrument, and the junction temperature can be estimated.
- the measurement of the junction temperature using the above-mentioned thermal resistance measuring device is suitable for being performed in a laboratory, it cannot be performed in a situation where a semiconductor device is actually used (when the switching element is driven).
- one object of the present disclosure is to provide a semiconductor device capable of measuring the junction temperature when the switching element is driven.
- the semiconductor device provided by the present disclosure has an element main surface and an element back surface facing opposite sides in a first direction, a drain electrode, a gate electrode, and a source electrode, and is between the drain electrode and the source electrode.
- a switching element whose on / off control is controlled between the drain electrode and the source electrode by applying a driving voltage between the gate electrode and the source electrode in a state where a potential difference is applied;
- a base having a front surface and a back surface and supporting the switching element so that the back surface of the element faces the front surface; a first terminal, each extending in a second direction perpendicular to the first direction. It includes a second terminal, a third terminal, and a fourth terminal.
- the switching element includes a temperature detection diode having a first electrode arranged on the main surface of the element.
- the drain electrode, the gate electrode, and the source electrode are electrically connected to any of the first terminal, the second terminal, and the third terminal, respectively.
- the first electrode is conducting with the fourth terminal via the first wire.
- the junction temperature when the switching element is driven can be measured.
- FIG. 1 It is a perspective view which shows the semiconductor device which concerns on 1st Embodiment. It is a top view of the semiconductor device A1 shown in FIG. It is sectional drawing which follows the line III-III of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. It is a figure which shows the circuit structure of the semiconductor device which concerns on 1st Embodiment. It is a top view which shows the modification of the semiconductor device which concerns on 1st Embodiment. It is a top view which shows the modification of the semiconductor device which concerns on 1st Embodiment. It is a top view which shows the semiconductor device which concerns on 2nd Embodiment. FIG.
- FIG. 5 is a cross-sectional view taken along the line XX of FIG. 9 is a cross-sectional view taken along the line XI-XI of FIG. It is a top view which shows the semiconductor device which concerns on 3rd Embodiment. It is sectional drawing which follows the XIII-XIII line of FIG. It is a top view which shows the semiconductor device which concerns on 4th Embodiment. It is sectional drawing which follows the XV-XV line of FIG. It is a top view which shows the semiconductor device which concerns on 5th Embodiment. It is a top view which shows the modification of the semiconductor device shown in FIG.
- FIG. 6 is a cross-sectional view taken along the line XVIII-XVIII of FIG.
- the semiconductor device A1 of the present embodiment includes a switching element 1, a lead frame 2, a gate wire 52, a source wire 53, a first wire 61, a second wire 62, and a sealing resin 7.
- FIG. 1 is a perspective view of the semiconductor device A1.
- FIG. 2 is a plane of the semiconductor device A1.
- FIG. 3 is a cross-sectional view taken along the line III-III of FIG.
- FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.
- FIG. 5 is a cross-sectional view taken along the line VV of FIG.
- the sealing resin 7 is permeated, and the sealing resin 7 is shown by an imaginary line.
- the thickness direction of the semiconductor device A1 is perpendicular to the first direction z and the first direction z
- the vertical direction of the plan view (FIG. 2) is the second direction y, the first direction z and the second direction.
- the left-right direction of the plan view (FIG. 2) which is perpendicular to any of the directions y, is defined as the third direction x.
- the terms "upper and lower” in the following description are used for convenience of explanation, and do not limit the installation posture of the semiconductor device A1 of the present
- the switching element 1 is a switching element using Si or SiC as a base material, and is an element that realizes the switching function that the semiconductor device A1 should fulfill.
- Examples of the switching element 1 include SiC-MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), SiC-bipolar transistor (Bipolar Transistor), SiC-JFET (Junction Field Effect Transistor), and SiC-IGBT (Insulated Gate Bipolar Transistor).
- SiC-MOSFET Metal-Oxide-Semiconductor Field Effect Transistor
- SiC-bipolar transistor Bipolar Transistor
- SiC-JFET Joint Field Effect Transistor
- SiC-IGBT Insulated Gate Bipolar Transistor
- the element main surface 11 is the upper surface of the switching element 1.
- the element back surface 12 is the lower surface of the switching element 1.
- the element main surface 11 and the element back surface 12 face each other in the first direction z.
- the switching element 1 has a drain electrode 131, a gate electrode 132, and a source electrode 133.
- the switching element 1 includes a temperature sensor.
- the temperature sensor is a temperature detection diode 15, but the present disclosure is not limited thereto.
- the drain electrode 131 is arranged on the back surface 12 of the element.
- the gate electrode 132 is arranged on the element main surface 11 (the surface opposite to the surface on which the drain electrode 131 is arranged).
- the source electrode 133 is arranged on the element main surface 11 (the same surface as the surface on which the gate electrode 132 is formed).
- the source electrode 133 is larger than the gate electrode 132.
- the switching element 1 controls the drain electrode 131 and the source electrode 133 to be turned on / off by applying a driving voltage to the gate electrode 132 and the source electrode 133 in a state where a potential difference is applied to the drain electrode 131 and the source electrode 133.
- the temperature detection diode 15 has a pn junction diode portion 150 built into the switching element 1 by a semiconductor process, and a first electrode 151 and a second electrode 152.
- the pn junction diode portion 150 is formed on the element main surface 11 side, and the first electrode 151 and the second electrode 152 are arranged on the element main surface 11.
- the first electrode 151 is an anode electrode and the second electrode 152 is a cathode electrode.
- the switching element 1 has a rectangular shape in the thickness direction view (first direction z view).
- the dimensions in the first direction z-view are 1 mm to 10 mm square.
- the thickness direction dimension of the switching element 1 is, for example, 40 ⁇ m to 700 ⁇ m.
- the switching element 1 is supported by a die pad 20 described later via a bonding material 3.
- the bonding material 3 is a conductive bonding material formed by using, for example, TiniAg-based solder, SnAgCu-based solder, Pb solder, or fired Ag in order to conduct the drain electrode 131 of the switching element 1 and the die pad 20.
- the lead frame 2 is a member having conductivity, and is joined to a circuit board (not shown) to form a conduction path between the switching element 1 and the circuit board.
- the lead frame 2 is made of an alloy containing Cu as a main component. A part of the surface may be plated in consideration of corrosion resistance, conductivity, thermal conductivity, bondability, and the like.
- the lead frame 2 is made of the same lead frame material, and includes a die pad 20, a first terminal 21, a second terminal 22, a third terminal 23, and a fourth terminal 24.
- the die pad 20 has a front surface 20a and a back surface 20b.
- the surface 20a is the upper surface of the die pad 20.
- the surface 20a is a surface on which the switching element 1 is mounted, and as shown in FIGS. 3 to 5, the element back surface 12 of the switching element 1 faces the surface 20a.
- the back surface 20b is the lower surface of the die pad 20. Both the front surface 20a and the back surface 20b are flat and face each other in the first direction z.
- the die pad 20 is formed with a through hole 20c extending from the front surface 20a to the back surface 20b.
- the through hole 20c is separated from the switching element 1 in the thickness direction view (first direction z view).
- the through hole 20c is circular in the thickness direction, but its shape is not particularly limited.
- the die pad 20 is an example of a "base”.
- the first terminal 21, the second terminal 22, the third terminal 23, and the fourth terminal 24 are arranged apart from each other in the third direction x, and when the semiconductor device A1 is mounted on, for example, a circuit board (not shown). Used for.
- the first terminal 21 is arranged apart from the die pad 20 and extends along the second direction y.
- the first terminal 21 is arranged on the outermost side (left side in the figure) in the third direction x in the first direction z view.
- the first terminal 21 has a first pad 211 and a tip portion 212.
- the first pad 211 is closest to the die pad 20 in the second direction y.
- the tip portion 212 is a tip portion of the first terminal 21 located on the opposite side of the first pad 211, and is located farthest from the die pad 20 in the second direction y.
- a gate wire 52 is joined to the first pad 211.
- the first terminal 21 is conducting to the gate electrode 132 via the gate wire 52.
- the first terminal 21 is a gate terminal of the semiconductor device A1.
- the second terminal 22 is arranged apart from the die pad 20 and extends along the second direction y.
- the first terminal 21 is arranged on the outermost side (right side in the figure) in the third direction x in the first direction z view. As a result, the second terminal 22 and the first terminal 21 are located on the outermost side opposite to each other in the third direction x.
- the second terminal 22 has a second pad 221 and a tip portion 222.
- the second pad 221 is closest to the die pad 20 in the second direction y.
- the tip portion 222 is a tip portion of the second terminal 22 located on the side opposite to the second pad 221 and is located at the position farthest from the die pad 20 in the second direction y.
- a source wire 53 is joined to the second pad 221.
- the second terminal 22 conducts to the source electrode 133 via the source wire 53.
- the second terminal 22 is a source terminal of the semiconductor device A1.
- a second wire 62 is joined to the second pad 221.
- the second terminal 22 is conducting to the second electrode 152 via the second wire 62.
- the third terminal 23 is connected to the die pad 20 and extends from the die pad 20 along the second direction y.
- the third terminal 23 is one end (lower end in the figure) of the die pad 20 in the second direction y and the third direction x of the die pad 20 in the first direction z-view. Connects to the center of.
- the third terminal 23 is located between the first terminal 21 and the second terminal 22 in the third direction x.
- the third terminal 23 has an intermediate bent portion 233 and a tip portion 232. As shown in FIG. 5, the intermediate bent portion 233 is a portion of the third terminal 23 where the portion exposed from the sealing resin 7 is bent so as to be biased upward from the die pad 20 in the first direction z.
- the tip portion 232 is the tip portion of the third terminal 23, and is located at the position farthest from the die pad 20 in the second direction y.
- the third terminal 23 is conductive to the drain electrode 131 via the die pad 20 and the bonding material 3.
- the third terminal 23 is a drain terminal of the semiconductor device A1.
- the fourth terminal 24 is arranged apart from the die pad 20 and extends along the second direction y.
- the fourth terminal 24 is located between the second terminal 22 and the third terminal 23 in the first direction z-view.
- the fourth terminal 24 has a fourth pad 241 and a tip portion 242 and a bent portion 243.
- the fourth pad 241 is closest to the die pad 20 in the second direction y.
- the tip portion 242 is a tip portion of the fourth terminal 24 located on the opposite side of the fourth pad 241 and is located at the position farthest from the die pad 20 in the second direction y.
- the bent portion 243 is located between the fourth pad 241 and the tip portion 242, and is provided closer to the fourth pad 241 in the second direction y.
- the tip side of the fourth terminal 24 with respect to the bent portion 243 is biased to one side in the first direction z (the side facing the surface 20a of the die pad 20). Since the fourth terminal 24 has the bent portion 243, the tip portion 242 of the fourth terminal 24 has a higher tip portion 212, 222, 232 than the tip portions 212, 222, 232 of the first terminal 21, the second terminal 22, and the third terminal 23, respectively. It is biased to the one side (the side facing the surface 20a of the die pad 20) in one direction z.
- the shape when the fourth terminal 24 extends straight from the fourth pad 241 to the tip portion 242 along the second direction y without having the bent portion 243 is illustrated by an imaginary line. Shown.
- the first wire 61 is joined to the fourth pad 241 of the fourth terminal 24.
- the fourth terminal 24 is conductive to the first electrode 151 via the first wire 61.
- the distance (first distance d13) between the center line C1 of the first terminal 21 (gate terminal) and the center line C3 of the third terminal 23 (drain terminal) in the third direction x is the third. It is larger than the distance (second distance d34) between the center line C3 of the terminal 23 (drain terminal) and the center line C4 of the fourth terminal 24 in the third direction x. Further, the first distance d13 is larger than the distance (third distance d24) between the center line C4 of the fourth terminal 24 and the center line C2 of the second terminal 22 (source terminal) in the third direction x.
- the second distance d34 and the third distance d24 are substantially the same. Further, the total of the second distance d34 and the third distance d24 is substantially the same as the first distance d13.
- the gate wire 52 is joined to the gate electrode 132 of the switching element 1 and the first pad 211 of the first terminal 21, and the gate electrode 132 of the switching element 1 and the first terminal 21 are connected to each other. It is conducting. In FIG. 4, the gate wire 52 is omitted.
- the source wire 53 is joined to the source electrode 133 of the switching element 1 and the second pad 221 of the second terminal 22, and conducts the source electrode 133 of the switching element 1 and the second terminal 22. In FIGS. 4 and 5, the source wire 53 is omitted.
- the first wire 61 is joined to the first electrode 151 of the switching element 1 (temperature detection diode 15) and the fourth pad 241 of the fourth terminal 24, and the first electrode 151 and the first electrode 151 of the temperature detection diode 15 are joined to each other. It is conductive with the 4 terminals 24. In FIG. 5, the first wire 61 is omitted.
- the second wire 62 is joined to the second electrode 152 of the switching element 1 (temperature detection diode 15) and the second pad 221 of the second terminal 22, and the second electrode 152 and the second electrode 152 of the temperature detection diode 15 are joined to each other.
- the two terminals 22 are made conductive.
- the gate wire 52, the source wire 53, the first wire 61 and the second wire 62 are made of, for example, Al (aluminum), an Al alloy, Cu or a Cu alloy.
- the wire diameter of the source wire 53 may be larger than the wire diameter of the other wires 52, 61, 62.
- a plurality of source wires 53 may be provided.
- the sealing resin 7 covers the switching element 1, a part of the lead frame 2, the gate wire 52, the source wire 53, the first wire 61, and the second wire 62, and is a member that protects them.
- the sealing resin 7 is a part of the die pad 20, the first terminal 21 (mainly the first pad 211), and the second terminal 22 (mainly the second pad 221) of the lead frame 2. ), A part of the third terminal 23 (mainly the intermediate bent portion 233), and a part of the fourth terminal 24 (mainly the fourth pad 241).
- the sealing resin 7 is a thermosetting synthetic resin having electrical insulation.
- the material of the sealing resin 7 is not particularly limited, and may be made of, for example, a black epoxy resin, and may be appropriately mixed with a filler.
- the sealing resin 7 has a resin main surface 71, a resin back surface 72, a pair of resin first side surfaces 73, and a pair of resin second side surfaces 74.
- the resin main surface 71 is the upper surface of the sealing resin 7 shown in FIGS. 3 to 5, and is a surface facing the same side as the surface 20a of the die pad 20.
- the resin back surface 72 is the lower surface of the sealing resin 7 shown in FIGS. 3 to 5, and is a surface facing the same side as the back surface 20b of the die pad 20.
- the resin main surface 71 and the resin back surface 72 are surfaces facing the first direction z, and face opposite to each other.
- the pair of resin first side surfaces 73 are surfaces formed so as to be separated from each other in the second direction y.
- the pair of resin first side surfaces 73 face each other in the second direction y.
- the upper end of the resin first side surface 73 shown in FIG. 5 is connected to the resin main surface 71, and the lower end of the resin first side surface 73 shown in FIG. 5 is connected to the resin back surface 72.
- a part of each of the first terminal 21, the second terminal 22, the third terminal 23, and the fourth terminal 24 is exposed from one of the resin first side surfaces 73.
- the pair of resin second side surfaces 74 are surfaces formed so as to be separated from each other in the third direction x as shown in FIGS. 3 and 4.
- the pair of resin second side surfaces 74 face each other in the third direction x.
- the upper end of the resin second side surface 74 shown in FIGS. 3 and 4 is connected to the resin main surface 71, and the lower end of the resin second side surface 74 shown in FIGS. 3 and 4 is connected to the resin back surface 72.
- the sealing resin 7 is formed with a pair of recesses 75 that are recessed inside the sealing resin 7 from above each of the pair of resin second side surfaces 74 shown in FIG. Further, as shown in FIGS. 1 and 5, the sealing resin 7 is formed with a resin through hole 76 extending from the resin main surface 71 to the resin back surface 72. In the present embodiment, the center of the resin through hole 76 is the same as the center of the through hole 20c in the die pad 20. Further, the diameter of the resin through hole 76 is smaller than the diameter of the through hole 20c. In the present embodiment, all the hole walls of the through holes 20c are covered with the sealing resin 7. Unlike the embodiment of the present embodiment, the through hole 20c and the resin through hole 76 may not be formed.
- the back surface 20b of the die pad 20 is covered with the sealing resin 7, but unlike this, the back surface 20b is sealed without being covered with the sealing resin 7. It may be configured to be exposed from the resin back surface 72 of the resin 7.
- the width of the third terminal 23 near the base end is larger than the width of the other first terminal 21, the second terminal 22, and the fourth terminal 24.
- the width of the third terminal 23 near the base end may be about the same as the width of the first terminal 21, the second terminal 22, and the fourth terminal 24.
- the width dimensions of the portions exposed from the sealing resin 7 at the first terminal 21, the second terminal 22, the third terminal 23, and the fourth terminal 24 are the same.
- FIG. 6 is a block diagram showing a circuit configuration of the semiconductor device A1 of the present embodiment.
- the fourth terminal 24 is conductive to the first electrode 151 of the temperature detection diode 15.
- the second terminal 22, which is the source terminal, is conducting to the second electrode 152 of the temperature detection diode 15.
- the semiconductor device A1 of the present embodiment includes a first terminal 21, a second terminal 22, and a third terminal 23 corresponding to three terminals of a gate terminal, a source terminal, and a drain terminal, and also includes a fourth terminal 24.
- the switching element 1 includes a temperature detection diode 15, and the first electrode 151 of the temperature detection diode 15 is conducting with the fourth terminal 24 via the first wire 61.
- the second electrode 152 of the temperature detection diode 15 is conducting to another terminal (second terminal 22 in this embodiment) via the second wire 62.
- a current is passed through the temperature detection diode 15 by using the fourth terminal 24 and the second terminal 22 which are conductive to the temperature detection diode 15 to measure the voltage, and the temperature depends on the resistance change of the diode.
- the junction temperature of the switching element 1 can be measured. Further, in the present embodiment, the junction temperature is measured by using the temperature detection diode 15 while driving the switching element 1 by providing the dedicated fourth terminal 24 for conducting the temperature detection diode 15. Can be done.
- the second electrode 152 of the temperature detection diode 15 is conducting to the second terminal 22 which is the source terminal.
- the source terminal (second terminal 22) is connected to the ground as a reference potential, and the potential is substantially stable at 0 V.
- the junction temperature can be stably measured even if a current is passed through the temperature detection diode 15.
- Such a configuration is suitable for stably measuring the junction temperature when the switching element 1 is driven while suppressing an increase in the number of terminals.
- the first terminal 21 (gate terminal) and the second terminal 22 (source terminal) are the first. It is located on the outermost side opposite to each other in the three directions x.
- the third terminal 23 (drain terminal) is located between the first terminal 21 and the second terminal 22 in the third direction x. According to such a configuration, the arrangement of the first terminal 21, the second terminal 22, and the third terminal 23 (gate terminal, source terminal, and drain terminal) is the same as that of the conventional three-terminal type switching device (semiconductor device). Therefore, it is easy to mount it on a circuit board or the like.
- the first distance d13 in the third direction x between the center line C1 of the first terminal 21 and the center line C3 of the third terminal 23 is the first of the center line C3 of the third terminal 23 and the center line C4 of the fourth terminal 24. It is larger than the third distance d24 in the third direction x of the second distance d34 in the three directions x and the center line C4 of the fourth terminal 24 and the center line C2 of the second terminal 22.
- the fourth terminal 24 is located at the center of the three terminals 23, 24, and 22 arranged in a state where the distance between them is relatively small. According to such a configuration, the dedicated fourth terminal 24 for conducting the temperature detection diode 15 can be easily distinguished from the other first to third terminals 21 to 23.
- the tip side of the bent portion 243 is biased to one side in the first direction z (the side facing the surface 20a of the die pad 20). Even with such a configuration, the dedicated fourth terminal 24 for conducting the temperature detection diode 15 can be easily distinguished from the other first to third terminals 21 to 23. Further, when the range from the bent portion 243 to the sealing resin 7 in the portion exposed from the sealing resin 7 in the fourth terminal 24 is covered with an insulating resin by, for example, a potting process, the third terminal 23 (drain) It is possible to appropriately secure the creepage distance between the terminal) and the second terminal 22 (source terminal). In this case, it is possible to increase the withstand voltage between the third terminal 23 (drain terminal) and the second terminal 22 (source terminal).
- the fourth terminal 24 may have a configuration that does not have a bent portion 243.
- the fourth terminal 24 extends straight along the second direction y, and the position (position in the vertical direction) of the fourth terminal 24 in the first direction z is The positions of the first terminal 21, the second terminal 22, and the third terminal 23 are substantially aligned with the positions in the first direction z of each.
- the point that the fourth terminal 24 may be configured not to have the bent portion 243 is the same in the variations described later.
- FIG. 7 shows a first modification of the semiconductor device A1 according to the first embodiment described above.
- the configurations of the first terminal 21 and the third terminal 23 and the joining states of the gate wire 52, the source wire 53, and the second wire 62 are mainly different from those of the semiconductor device A1 described above. It's different.
- the sealing resin 7 is permeated, and the sealing resin 7 is shown by an imaginary line.
- the same or similar elements as the semiconductor device A1 of the above embodiment are designated by the same reference numerals as those of the above embodiment, and the description thereof will be omitted as appropriate.
- the first terminal 21 is connected to the die pad 20 and extends from the die pad 20 along the second direction y.
- the third terminal 23 is connected to the left end in the figure in the third direction x of the die pad 20.
- the first terminal 21 has an intermediate bent portion 213 and a tip portion 212.
- the intermediate bent portion 213 is a portion of the first terminal 21 that is bent so that the portion exposed from the sealing resin 7 is deflected upward from the die pad 20 in the first direction z.
- the first terminal 21 is conductive to the drain electrode 131 via the die pad 20 and the bonding material 3.
- the first terminal 21 is a drain terminal of the semiconductor device A11.
- the third terminal 23 is arranged apart from the die pad 20 and extends along the second direction y.
- the third terminal 23 has a third pad 231 and a tip portion 232.
- the third pad 231 is closest to the die pad 20 in the second direction y.
- a source wire 53 is joined to the third pad 231.
- the third terminal 23 is conducting to the source electrode 133 via the source wire 53.
- the third terminal 23 is a source terminal of the semiconductor device A11.
- a second wire 62 is joined to the third pad 231.
- the third terminal 23 is conducting to the second electrode 152 via the second wire 62.
- a gate wire 52 is joined to the second pad 221.
- the second terminal 22 conducts to the gate electrode 132 via the gate wire 52.
- the second terminal 22 is a gate terminal of the semiconductor device A11.
- the gate wire 52 is joined to the gate electrode 132 of the switching element 1 and the second pad 221 of the second terminal 22, and conducts the gate electrode 132 of the switching element 1 and the second terminal 22.
- the source wire 53 is joined to the source electrode 133 of the switching element 1 and the third pad 231 of the third terminal 23, and conducts the source electrode 133 of the switching element 1 and the third terminal 23.
- the first wire 61 is joined to the first electrode 151 of the switching element 1 (temperature detection diode 15) and the fourth pad 241 of the fourth terminal 24, and the first electrode 151 and the first electrode 151 of the temperature detection diode 15 are joined to each other. It is conductive with the 4 terminals 24.
- the second wire 62 is joined to the second electrode 152 of the switching element 1 (temperature detection diode 15) and the third pad 231 of the third terminal 23, and the second electrode 152 and the second electrode 152 of the temperature detection diode 15 are joined to each other.
- the 3 terminals 23 are made conductive.
- the semiconductor device A11 includes a first terminal 21, a second terminal 22, and a third terminal 23 corresponding to three terminals of a drain terminal, a gate terminal, and a source terminal, and also includes a fourth terminal 24.
- the switching element 1 includes a temperature detection diode 15, and the first electrode 151 of the temperature detection diode 15 is conducting with the fourth terminal 24 via the first wire 61.
- the second electrode 152 of the temperature detection diode 15 is conducting to another terminal (third terminal 23 in this modification) via the second wire 62.
- a current is passed through the temperature detection diode 15 by using the fourth terminal 24 and the third terminal 23 which are conductive to the temperature detection diode 15 to measure the voltage, and the temperature of the resistance change of the diode depends on the temperature.
- the junction temperature of the switching element 1 can be measured. Further, in the present embodiment, the junction temperature is measured by using the temperature detection diode 15 while driving the switching element 1 by providing the dedicated fourth terminal 24 for conducting the temperature detection diode 15. Can be done.
- the second electrode 152 of the temperature detection diode 15 is conducting to the third terminal 23, which is the source terminal.
- the source terminal (third terminal 23) is connected to the ground as a reference potential, and the potential is substantially stable at 0 V.
- the junction temperature can be stably measured even if a current is passed through the temperature detection diode 15.
- Such a configuration is suitable for stably measuring the junction temperature when the switching element 1 is driven while suppressing an increase in the number of terminals.
- the first distance d13 in the third direction x between the center line C1 of the first terminal 21 and the center line C3 of the third terminal 23 is the first of the center line C3 of the third terminal 23 and the center line C4 of the fourth terminal 24. It is larger than the third distance d24 in the third direction x of the second distance d34 in the three directions x and the center line C4 of the fourth terminal 24 and the center line C2 of the second terminal 22.
- the fourth terminal 24 is located at the center of the three terminals 23, 24, and 22 arranged in a state where the distance between them is relatively small. According to such a configuration, the dedicated fourth terminal 24 for conducting the temperature detection diode 15 can be easily distinguished from the other first to third terminals 21 to 23.
- the third terminal 23, which is the source terminal, is adjacent to the first terminal 21 which is the drain terminal in the third direction x in the first direction z view.
- the first distance d13 between the first terminal 21 and the third terminal 23 in the third direction x is relatively large, and the creepage between the first terminal 21 (drain terminal) and the third terminal 23 (source terminal). It is possible to secure the distance as appropriate. This makes it possible to increase the withstand voltage between the first terminal 21 (drain terminal) and the third terminal 23 (source terminal).
- FIG. 8 shows a second modification of the semiconductor device A1 according to the first embodiment described above.
- the semiconductor device A12 of this modification is different from the above-mentioned semiconductor device A1 in the bonding state of each of the gate wire 52, the source wire 53, and the second wire 62.
- the sealing resin 7 is permeated, and the sealing resin 7 is shown by an imaginary line.
- the configurations of the first terminal 21, the second terminal 22, the third terminal 23, and the fourth terminal 24 are the same as those of the above-mentioned semiconductor device A1 (see FIG. 2).
- a source wire 53 is joined to the first pad 211 of the first terminal 21.
- the first terminal 21 is conducting to the source electrode 133 via the source wire 53.
- the first terminal 21 is a source terminal of the semiconductor device A12.
- a second wire 62 is joined to the first pad 211.
- the first terminal 21 is conducting to the second electrode 152 via the second wire 62.
- a gate wire 52 is joined to the second pad 221 of the second terminal.
- the second terminal 22 conducts to the gate electrode 132 via the gate wire 52.
- the second terminal 22 is a gate terminal of the semiconductor device A12.
- the third terminal 23 is conductive to the drain electrode 131 via the die pad 20 and the bonding material 3.
- the third terminal 23 is a drain terminal of the semiconductor device A12.
- the gate wire 52 is joined to the gate electrode 132 of the switching element 1 and the second pad 221 of the second terminal 22, and conducts the gate electrode 132 of the switching element 1 and the second terminal 22.
- the source wire 53 is joined to the source electrode 133 of the switching element 1 and the first pad 211 of the first terminal 21, and conducts the source electrode 133 of the switching element 1 and the first terminal 21.
- the first wire 61 is joined to the first electrode 151 of the switching element 1 (temperature detection diode 15) and the fourth pad 241 of the fourth terminal 24, and the first electrode 151 and the first electrode 151 of the temperature detection diode 15 are joined to each other. It is conductive with the 4 terminals 24.
- the second wire 62 is joined to the second electrode 152 of the switching element 1 (temperature detection diode 15) and the first pad 211 of the first terminal 21, and the second electrode 152 and the second electrode 152 of the temperature detection diode 15 are joined to each other. It is electrically connected to the 1 terminal 21.
- the semiconductor device A12 includes a first terminal 21, a second terminal 22, and a third terminal 23 corresponding to three terminals of a source terminal, a gate terminal, and a drain terminal, and also includes a fourth terminal 24.
- the switching element 1 includes a temperature detection diode 15, and the first electrode 151 of the temperature detection diode 15 is conducting with the fourth terminal 24 via the first wire 61.
- the second electrode 152 of the temperature detection diode 15 is conducting to another terminal (first terminal 21 in this modification) via the second wire 62.
- a current is passed through the temperature detection diode 15 by using the fourth terminal 24 and the third terminal 23 which are conductive to the temperature detection diode 15 to measure the voltage, and the temperature of the resistance change of the diode depends on the temperature.
- the junction temperature of the switching element 1 can be measured.
- the junction temperature can be measured by using the temperature detection diode 15 while driving the switching element 1. ..
- the second electrode 152 of the temperature detection diode 15 is conducting to the first terminal 21 which is a source terminal.
- the source terminal (first terminal 21) is connected to the ground as a reference potential, and the potential is substantially stable at 0 V.
- the junction temperature can be stably measured even if a current is passed through the temperature detection diode 15.
- Such a configuration is suitable for stably measuring the junction temperature when the switching element 1 is driven while suppressing an increase in the number of terminals.
- the first terminal 21 (source terminal) and the second terminal 22 (gate terminal) are the first terminals. It is located on the outermost side opposite to each other in the three directions x.
- the third terminal 23 (drain terminal) is located between the first terminal 21 and the second terminal 22 in the third direction x. According to such a configuration, the arrangement of the first terminal 21, the second terminal 22, and the third terminal 23 (source terminal, gate terminal, and drain terminal) is the same as that of the conventional three-terminal type switching device (semiconductor device). Therefore, it is easy to mount it on a circuit board or the like.
- the first distance d13 in the third direction x between the center line C1 of the first terminal 21 and the center line C3 of the third terminal 23 is the first of the center line C3 of the third terminal 23 and the center line C4 of the fourth terminal 24. It is larger than the third distance d24 in the third direction x of the second distance d34 in the three directions x and the center line C4 of the fourth terminal 24 and the center line C2 of the second terminal 22.
- the fourth terminal 24 is located at the center of the three terminals 23, 24, and 22 arranged in a state where the distance between them is relatively small. According to such a configuration, the dedicated fourth terminal 24 for conducting the temperature detection diode 15 can be easily distinguished from the other first to third terminals 21 to 23.
- the first terminal 21 which is a source terminal is adjacent to the third terminal 23 which is a drain terminal in the third direction x in the first direction z view.
- the first distance d13 between the first terminal 21 and the third terminal 23 in the third direction x is relatively large, and the first terminal 21 (source terminal) and the third terminal 23 (drain terminal) It is possible to secure the creepage distance of. This makes it possible to increase the withstand voltage between the first terminal 21 (source terminal) and the third terminal 23 (drain terminal).
- the semiconductor device A2 of the present embodiment includes a substrate 2A and a first terminal 41, a second terminal 42, a third terminal 43, and a fourth terminal 44 in place of the lead frame 2 of the above embodiment.
- the sealing resin 7 is permeated, and the sealing resin 7 is shown by an imaginary line.
- the substrate 2A has an insulating layer 25, a front surface conductive layer 26, and a back surface metal layer 27.
- the insulating layer 25 is a plate-shaped member made of an insulating material.
- the insulating layer 25 has a rectangular shape in the first direction z-view.
- the material of the substrate 2A is not particularly limited, and is made of, for example, ceramics such as alumina, aluminum nitride, silicon nitride, boron nitride, and graphite.
- the surface conductive layer 26 is laminated and arranged on the upper surface of the substrate 2A, and is mainly for forming a conduction path to the switching element 1.
- the material of the surface conductive layer 26 is not particularly limited, and may be formed of a metal such as Cu and an alloy thereof, and may have a plating layer of Ni, Ag or the like, if necessary.
- the method for forming the surface conductive layer 26 is not particularly limited, and for example, a metal plate member may be joined to the upper surface of the substrate 2A.
- the surface conductive layer 26 has a front surface 26a and a back surface 26b.
- the surface 26a is the upper surface of the surface conductive layer 26.
- the surface 26a (the surface 26a portion of the drain electrode portion 261 described later) is a surface on which the switching element 1 is mounted, and the element back surface 12 of the switching element 1 faces the surface 26a.
- the back surface 26b is the lower surface of the surface conductive layer 26. Both the front surface 26a and the back surface 26b are flat and face each other in the first direction z.
- the surface conductive layer 26 has a drain electrode portion 261 and a source electrode portion 263.
- the drain electrode portion 261 is a portion where the switching element 1 is mounted and the third terminal 43 is joined.
- the switching element 1 is supported by the insulating layer 25 and the drain electrode portion 261 (surface conductive layer 26) via the bonding material 3.
- the drain electrode portion 261 is sized to occupy the majority of the surface conductive layer 26.
- the source electrode portion 263 is a portion that conducts to the source electrode 133 of the switching element 1 and is joined to the second terminal 42.
- the source electrode portion 263 is separated from the drain electrode portion 261.
- the surface conductive layer 26 having the above configuration is an example of the “base”.
- the back surface metal layer 27 is laminated and arranged on the lower surface of the substrate 2A.
- the back surface metal layer 27, the drain electrode portion 261 and the switching element 1 are insulated from each other.
- the back surface metal layer 27 is formed in a size and shape that covers most of the lower surface of the substrate 2A. That is, the back surface metal layer 27 overlaps substantially the entire drain electrode portion 261 and the switching element 1 in the first direction z-view.
- the first terminal 41, the second terminal 42, the third terminal 43, and the fourth terminal 44 form a conduction path between the outside of the semiconductor device A2 and the switching element 1.
- These terminals 41 to 44 are arranged apart from each other in the third direction x, and are used when mounting the semiconductor device A2 on, for example, a circuit board (not shown).
- the first terminal 41 extends along the second direction y and has a joint portion 411, a bent portion 412, and a tip portion 413.
- the joint portion 411 is a portion joined to the upper surface of the substrate 2A, and is a root portion of the first terminal 41.
- the joining method between the joining portion 411 and the upper surface of the substrate 2A is not particularly limited, and for example, joining using various joining materials may be appropriately adopted.
- the bent portion 412 is a bent portion connected to the joint portion 411, and has a shape that separates the portion between the bent portion 412 and the tip portion 413 from the back surface metal layer 27 in the first direction z.
- the tip portion 413 is the tip of the first terminal 41 located on the opposite side of the joint portion 411.
- a gate wire 52 is joined to the joint portion 411.
- the first terminal 41 is conducting to the gate electrode 132 via the gate wire 52.
- the first terminal 41 is a gate terminal of the semiconductor device A2.
- the second terminal 42 extends along the second direction y and is arranged on the outermost side (right side in the figure) in the third direction x in the first direction z view.
- the second terminal 42 has a joint portion 421, a bent portion 422, and a tip portion 423.
- the joint portion 421 is a portion joined to the source electrode portion 263, and is a root portion of the second terminal 42.
- the bonding method between the bonding portion 421 and the source electrode portion 263 is not particularly limited, and various methods such as bonding using a conductive bonding material, ultrasonic bonding, and resistance welding may be appropriately adopted. In this embodiment, a conductive bonding material is used.
- the bent portion 422 is a bent portion connected to the joint portion 421, and has a shape that separates the portion between the bent portion 422 and the tip portion 423 from the back surface metal layer 27 in the first direction z.
- the tip portion 423 is the tip of the second terminal 42 located on the opposite side of the joint portion 421.
- a source wire 53 is joined to the source electrode portion 263.
- the second terminal 42 conducts to the source electrode 133 via the source electrode portion 263 and the source wire 53.
- the second terminal 42 is a source terminal of the semiconductor device A2.
- a second wire 62 is joined to the source electrode portion 263.
- the second terminal 42 conducts to the second electrode 152 via the source electrode portion 263 and the second wire 62.
- the third terminal 43 extends along the second direction y, and is arranged between the first terminal 41 and the second terminal 42 in the third direction x in the first direction z view.
- the third terminal 43 has a joint portion 431, a bent portion 432, and a tip portion 433.
- the joint portion 431 is a portion joined to the drain electrode portion 261 and is a root portion of the third terminal 43.
- the bonding method between the bonding portion 431 and the drain electrode portion 261 is not particularly limited, and various methods such as bonding using a conductive bonding material, ultrasonic bonding, and resistance welding may be appropriately adopted. In this embodiment, a conductive bonding material is used.
- the bent portion 432 is a bent portion connected to the joint portion 431, and has a shape that separates the portion between the bent portion 432 and the tip portion 433 from the back surface metal layer 27 in the first direction z.
- the tip portion 433 is the tip of the third terminal 43 located on the opposite side of the joint portion 431.
- the second terminal 42 is conductive to the drain electrode 131 via the drain electrode portion 261 and the bonding material 3.
- the third terminal 43 is a drain terminal of the semiconductor device A2.
- the fourth terminal 44 extends along the second direction y, and is arranged between the second terminal 42 and the third terminal 43 in the third direction x in the first direction z view.
- the fourth terminal 44 has a joint portion 441, a bent portion 442, a tip portion 443, and a bent portion 444.
- the joint portion 441 is a portion joined to the upper surface of the substrate 2A, and is a root portion of the fourth terminal 44.
- the joining method between the joining portion 441 and the upper surface of the substrate 2A is not particularly limited, and for example, joining using various joining materials may be appropriately adopted.
- the bent portion 442 is a bent portion connected to the joint portion 441, and has a shape that separates the portion between the bent portion 442 and the tip portion 443 from the back surface metal layer 27 in the first direction z.
- the tip portion 443 is the tip of the fourth terminal 44 located on the opposite side of the joint portion 441.
- the bent portion 444 is located at the bent portion 442 and the tip portion 443, and is provided closer to the bent portion 442.
- the bent portion 444 has a shape that separates the portion between the bent portion 444 and the tip portion 443 from the back surface metal layer 27 in the first direction z.
- the tip side of the fourth terminal 44 with respect to the bent portion 444 is biased to one side in the first direction z (the side facing the surface 26a of the surface conductive layer 26). Since the fourth terminal 44 has the bent portion 444, the tip portion 443 of the fourth terminal 44 is more than the tip portions 413, 423, 433 of the first terminal 41, the second terminal 42, and the third terminal 43, respectively. It is biased to the one side (the side facing the surface 26a of the surface conductive layer 26) in one direction z.
- the first wire 61 is joined to the joint portion 441 of the fourth terminal 44.
- the fourth terminal 44 is conductive to the first electrode 151 via the first wire 61.
- the distance (first distance d13) between the center line C1 of the first terminal 41 (gate terminal) and the center line C3 of the third terminal 43 (drain terminal) in the third direction x is the third. It is larger than the distance (second distance d34) between the center line C3 of the terminal 43 (drain terminal) and the center line C4 of the fourth terminal 44 in the third direction x. Further, the first distance d13 is larger than the distance (third distance d24) between the center line C4 of the fourth terminal 44 and the center line C2 of the second terminal 42 (source terminal) in the third direction x.
- the second distance d34 and the third distance d24 are substantially the same. Further, the total of the second distance d34 and the third distance d24 is substantially the same as the first distance d13.
- the gate wire 52 is joined to the gate electrode 132 of the switching element 1 and the joint portion 411 of the first terminal 41, and conducts the gate electrode 132 of the switching element 1 and the first terminal 41. I'm letting you. In FIG. 10, the gate wire 52 is omitted.
- the source wire 53 is joined to the source electrode 133 of the switching element 1 and the source electrode portion 263, and conducts the source electrode 133 of the switching element 1 and the second terminal 42. In FIGS. 10 and 11, the source wire 53 is omitted.
- the first wire 61 is joined to the joint portion 441 of the first electrode 151 of the switching element 1 (temperature detection diode 15) and the fourth terminal 44, and the first electrodes 151 and the fourth of the temperature detection diode 15 are joined. It is conductive with the terminal 44. In FIG. 11, the first wire 61 is omitted.
- the second wire 62 is joined to the second electrode 152 of the switching element 1 (temperature detection diode 15) and the source electrode portion 263 of the second terminal 42, and the second electrode 152 and the second electrode 152 of the temperature detection diode 15 are joined to each other.
- the two terminals 42 are made conductive.
- the sealing resin 7 includes a switching element 1, a part of the substrate 2A, a part of the first terminal 41, a part of the second terminal 42, a part of the third terminal 43, a part of the fourth terminal 44, and a gate wire. It covers 52, the source wire 53, the first wire 61, and the second wire 62, and protects them.
- the sealing resin 7 has a resin main surface 71, a resin back surface 72, a pair of resin first side surfaces 73, and a pair of resin second side surfaces 74.
- the resin main surface 71 is the upper surface of the sealing resin 7 shown in FIGS. 10 and 11, and is a surface facing the same side as the surface 26a of the surface conductive layer 26.
- the resin back surface 72 is the lower surface of the sealing resin 7 shown in FIGS. 10 and 11, and is a surface facing the same side as the back surface 26b of the surface conductive layer 26.
- the resin main surface 71 and the resin back surface 72 are surfaces facing the first direction z, and face opposite to each other.
- the entire one side of the back metal layer 27 is exposed from the resin back surface 72 of the sealing resin 7.
- One side of the back surface metal layer 27 is flush with the resin back surface 72.
- the pair of resin first side surfaces 73 are surfaces formed so as to be separated from each other in the second direction y.
- the pair of resin first side surfaces 73 face each other in the second direction y.
- the upper end of the resin first side surface 73 shown in FIG. 11 is connected to the resin main surface 71, and the lower end of the resin first side surface 73 shown in FIG. 11 is connected to the resin back surface 72.
- a part of each of the first terminal 41, the second terminal 42, the third terminal 43, and the fourth terminal 44 is exposed from one of the resin first side surfaces 73.
- the pair of resin second side surfaces 74 are surfaces formed so as to be separated from each other in the third direction x as shown in FIG.
- the pair of resin second side surfaces 74 face each other in the third direction x.
- the upper end of the resin second side surface 74 shown in FIG. 10 is connected to the resin main surface 71, and the lower end of the resin second side surface 74 shown in FIG. 10 is connected to the resin back surface 72.
- the semiconductor device A2 of the present embodiment includes a first terminal 41, a second terminal 42, and a third terminal 43 corresponding to three terminals of a gate terminal, a source terminal, and a drain terminal, and also includes a fourth terminal 44.
- the switching element 1 includes a temperature detection diode 15, and the first electrode 151 of the temperature detection diode 15 is conducting with the fourth terminal 44 via the first wire 61.
- the second electrode 152 of the temperature detection diode 15 is conducting to another terminal (second terminal 42 in this embodiment) via the second wire 62.
- a current is passed through the temperature detection diode 15 by using the fourth terminal 44 and the second terminal 42 that conduct with the temperature detection diode 15 to measure the voltage, and the temperature of the resistance change of the diode depends on the temperature.
- the junction temperature of the switching element 1 can be measured. Further, in the present embodiment, the junction temperature is measured by using the temperature detection diode 15 while driving the switching element 1 by providing the dedicated fourth terminal 44 for conducting the temperature detection diode 15. Can be done.
- the second electrode 152 of the temperature detection diode 15 is conducting to the second terminal 42, which is the source terminal.
- the source terminal (second terminal 42) is connected to the ground as a reference potential, and the potential is substantially stable at 0 V.
- the junction temperature can be stably measured even if a current is passed through the temperature detection diode 15.
- Such a configuration is suitable for stably measuring the junction temperature when the switching element 1 is driven while suppressing an increase in the number of terminals.
- the first terminal 41 (gate terminal) and the second terminal 42 (source terminal) are the first terminals. It is located on the outermost side opposite to each other in the three directions x. Further, the third terminal 43 (drain terminal) is located between the first terminal 41 and the second terminal 42 in the third direction x. According to such a configuration, the arrangement of the first terminal 41, the second terminal 42, and the third terminal 43 (gate terminal, source terminal, and drain terminal) is the same as that of the conventional three-terminal type switching device (semiconductor device). Therefore, it is easy to mount it on a circuit board or the like.
- the first distance d13 in the third direction x between the center line C1 of the first terminal 41 and the center line C3 of the third terminal 43 is the first of the center line C3 of the third terminal 43 and the center line C4 of the fourth terminal 44.
- the second distance d34 in the three directions x and the center line C4 of the fourth terminal 44 and the center line C2 of the second terminal 42 are larger than the third distance d24 in the third direction x.
- the fourth terminal 44 is located at the center of the three terminals 43, 44, 42 arranged in a state where the distance between them is relatively small. According to such a configuration, the dedicated fourth terminal 44 for conducting the temperature detection diode 15 can be easily distinguished from the other first to third terminals 41 to 43.
- the tip end side of the bent portion 444 is biased to one side in the first direction z (the side facing the surface 26a of the surface conductive layer 26). Even with such a configuration, the dedicated fourth terminal 44 for conducting the temperature detection diode 15 can be easily distinguished from the other first to third terminals 41 to 43. Further, when the range from the bent portion 444 to the sealing resin 7 of the portion exposed from the sealing resin 7 in the fourth terminal 44 is covered with an insulating resin by, for example, a potting process, the third terminal 43 (drain) It is possible to appropriately secure the creepage distance between the terminal) and the second terminal 42 (source terminal). In this case, it is possible to increase the withstand voltage between the third terminal 43 (drain terminal) and the second terminal 42 (source terminal).
- the fourth terminal 44 may have a configuration that does not have a bent portion 444.
- the fourth terminal 44 extends straight along the second direction y, and the positions of the fourth terminal 44 in the first direction z (positions in the vertical direction) are the first terminal 41, the second terminal 42, and the third terminal. 43 Substantially aligned with the position in each first direction z.
- FIG. 12 and 13 show the semiconductor device according to the third embodiment of the present disclosure.
- the semiconductor device A3 of the present embodiment has a different configuration of the temperature detection diode 15 from the semiconductor device A1 of the above embodiment.
- the sealing resin 7 is permeated, and the sealing resin 7 is shown by an imaginary line.
- the first electrode 151 of the temperature detection diode 15 is arranged on the element main surface 11, while the second electrode 152 is arranged on the element back surface 12.
- the pn junction diode portion 150 is formed in the thickness direction (first direction z) of the switching element 1.
- the drain electrode 131 arranged on the back surface 12 of the element also serves as the second electrode 152.
- the third terminal 23, which is a drain terminal, is electrically connected to the drain electrode 131 (second electrode 152) via the die pad 20 and the joining material 3.
- the second wire 62 is not provided.
- the semiconductor device A3 of the present embodiment includes a first terminal 21, a second terminal 22, and a third terminal 23 corresponding to three terminals of a gate terminal, a source terminal, and a drain terminal, and also includes a fourth terminal 24.
- the switching element 1 includes a temperature detection diode 15, and the first electrode 151 of the temperature detection diode 15 is conducting with the fourth terminal 24 via the first wire 61.
- the second electrode 152 of the temperature detection diode 15 is conducting to another terminal (third terminal 23 in this embodiment).
- a current is passed through the temperature detection diode 15 by using the fourth terminal 24 and the third terminal 23 which are conductive to the temperature detection diode 15 to measure the voltage, and the temperature of the resistance change of the diode depends on the temperature.
- the junction temperature of the switching element 1 can be measured. Further, in the present embodiment, the junction temperature is measured by using the temperature detection diode 15 while driving the switching element 1 by providing the dedicated fourth terminal 24 for conducting the temperature detection diode 15. Can be done.
- the first terminal 21 (gate terminal) and the second terminal 22 (source terminal) are the first. It is located on the outermost side opposite to each other in the three directions x. Further, the third terminal 23 (drain terminal) is located between the first terminal 21 and the second terminal 22 in the third direction x. According to such a configuration, the arrangement of the first terminal 21, the second terminal 22, and the third terminal 23 (gate terminal, source terminal, and drain terminal) is the same as that of the conventional three-terminal type switching device (semiconductor device). Therefore, it is easy to mount it on a circuit board or the like.
- the first distance d13 in the third direction x between the center line C1 of the first terminal 21 and the center line C3 of the third terminal 23 is the first of the center line C3 of the third terminal 23 and the center line C4 of the fourth terminal 24. It is larger than the third distance d24 in the third direction x of the second distance d34 in the three directions x and the center line C4 of the fourth terminal 24 and the center line C2 of the second terminal 22.
- the fourth terminal 24 is located at the center of the three terminals 23, 24, and 22 arranged in a state where the distance between them is relatively small. According to such a configuration, the dedicated fourth terminal 24 for conducting the temperature detection diode 15 can be easily distinguished from the other first to third terminals 21 to 23.
- the tip side of the bent portion 243 is biased to one side in the first direction z (the side facing the surface 20a of the die pad 20). Even with such a configuration, the dedicated fourth terminal 24 for conducting the temperature detection diode 15 can be easily distinguished from the other first to third terminals 21 to 23. Further, when the range from the bent portion 243 to the sealing resin 7 in the portion exposed from the sealing resin 7 in the fourth terminal 24 is covered with an insulating resin by, for example, a potting process, the third terminal 23 (drain) It is possible to appropriately secure the creepage distance between the terminal) and the second terminal 22 (source terminal). In this case, it is possible to increase the withstand voltage between the third terminal 23 (drain terminal) and the second terminal 22 (source terminal).
- the semiconductor device A4 of the present embodiment is different from the above-mentioned semiconductor device A1 in the specific configuration of the first terminal 21 to the fourth terminal 24, and accordingly, the gate wire 52, the source wire 53, the first wire 61, and the semiconductor device A4.
- the bonding state of the second wire 62 is appropriately different from that of the above-mentioned semiconductor device A1.
- the sealing resin 7 is permeated, and the sealing resin 7 is shown by an imaginary line.
- the first terminal 21 is arranged apart from the die pad 20 and extends to one side (lower side in the drawing) of the second direction y.
- the first terminal 21 is arranged on the outermost side (left side in the figure) in the third direction x in the first direction z view.
- the first terminal 21 has a first pad 211 and a tip portion 212.
- the first terminal 21 is conducting to the gate electrode 132 via the gate wire 52.
- the first terminal 21 is a gate terminal of the semiconductor device A4.
- the second terminal 22 is separated from the die pad 20 and is arranged on one side of the second direction y (lower side in the drawing of FIG. 14).
- the second terminal 22 has a second pad 221 and a plurality of tip portions 222.
- the second pad 221 is arranged from the center to the right end in the third direction x in the first direction z view.
- the plurality of tip portions 222 are arranged at intervals from each other in the third direction x, and each is connected to the second pad 221.
- the second terminal 22 (second pad 221) is conducting to the source electrode 133 via the source wire 53.
- the second terminal 22 is a source terminal of the semiconductor device A4.
- a second wire 62 is joined to the second pad 221.
- the second terminal 22 is conducting to the second electrode 152 via the second wire 62.
- the third terminal 23 is connected to the die pad 20 and is arranged on the other side of the second direction y (upper side in the drawing of FIG. 14) with respect to the die pad 20.
- the third terminal 23 is elongated in the third direction x.
- the third terminal 23 is conductive to the drain electrode 131 via the die pad 20 and the bonding material 3.
- the third terminal 23 is a drain terminal of the semiconductor device A4.
- the fourth terminal 24 is arranged apart from the die pad 20 and extends to one side of the second direction y (lower side in the drawing of FIG. 14).
- the fourth terminal 24 is arranged to the left in the figure in the third direction x in the first direction z view.
- the fourth terminal 24 has a fourth pad 241 and a tip portion 242.
- a first wire 61 is joined to the fourth pad 241 of the fourth terminal 24.
- the fourth terminal 24 is conductive to the first electrode 151 via the first wire 61.
- the gate wire 52 is joined to the gate electrode 132 of the switching element 1 and the first pad 211 of the first terminal 21, and the gate electrode 132 of the switching element 1 and the first terminal 21 are connected to each other. It is conducting.
- the source wire 53 is joined to the source electrode 133 of the switching element 1 and the second pad 221 of the second terminal 22, and conducts the source electrode 133 of the switching element 1 and the second terminal 22. Note that the source wire 53 is omitted in FIG.
- the first wire 61 is joined to the first electrode 151 of the switching element 1 (temperature detection diode 15) and the fourth pad 241 of the fourth terminal 24, and the first electrode 151 and the first electrode 151 of the temperature detection diode 15 are joined to each other. It is conductive with the 4 terminals 24.
- the second wire 62 is joined to the second electrode 152 of the switching element 1 (temperature detection diode 15) and the second pad 221 of the second terminal 22, and the second electrode 152 and the second electrode 152 of the temperature detection diode 15 are joined to each other.
- the two terminals 22 are made conductive. In FIG. 15, the second wire 62 is omitted.
- the semiconductor device A4 includes a first terminal 21, a second terminal 22, and a third terminal 23 corresponding to three terminals of a gate terminal, a source terminal, and a drain terminal, and also includes a fourth terminal 24.
- the switching element 1 includes a temperature detection diode 15, and the first electrode 151 of the temperature detection diode 15 is conducting with the fourth terminal 24 via the first wire 61.
- the second electrode 152 of the temperature detection diode 15 is conducting to another terminal (second terminal 22 in this embodiment) via the second wire 62.
- a current is passed through the temperature detection diode 15 by using the fourth terminal 24 and the second terminal 22 which are conductive to the temperature detection diode 15 to measure the voltage, and the temperature depends on the resistance change of the diode.
- the junction temperature of the switching element 1 can be measured. Further, in the present embodiment, the junction temperature is measured by using the temperature detection diode 15 while driving the switching element 1 by providing the dedicated fourth terminal 24 for conducting the temperature detection diode 15. Can be done.
- the second electrode 152 of the temperature detection diode 15 is conducting to the second terminal 22 which is the source terminal.
- the source terminal (second terminal 22) is connected to the ground as a reference potential, and the potential is substantially stable at 0 V.
- the junction temperature can be stably measured even if a current is passed through the temperature detection diode 15.
- Such a configuration is suitable for stably measuring the junction temperature when the switching element 1 is driven while suppressing an increase in the number of terminals.
- FIG. 16 shows a semiconductor device according to the fifth embodiment of the present disclosure.
- the semiconductor device A5 of the present embodiment is additionally provided with the fifth terminal 250 as compared with the semiconductor device A4 described above, and accordingly, the bonding state of the second wire 62 is different from that of the semiconductor device A4 described above. ..
- the sealing resin 7 is permeated, and the sealing resin 7 is shown by an imaginary line.
- the fifth terminal 250 is arranged apart from the die pad 20 and extends to one side of the second direction y (lower side in the drawing of FIG. 16). The fifth terminal 250 is arranged closer to the center in the figure in the third direction x in the first direction z view.
- the fifth terminal 250 has a fifth pad 251 and a tip portion 252.
- a second wire 62 is joined to the fifth pad 251.
- the fifth terminal 250 is conducting to the second electrode 152 via the second wire 62.
- the gate wire 52 is joined to the gate electrode 132 of the switching element 1 and the first pad 211 of the first terminal 21, and the gate electrode 132 of the switching element 1 and the first terminal 21 are connected to each other. It is conducting.
- the source wire 53 is joined to the source electrode 133 of the switching element 1 and the second pad 221 of the second terminal 22, and conducts the source electrode 133 of the switching element 1 and the second terminal 22.
- the first wire 61 is joined to the first electrode 151 of the switching element 1 (temperature detection diode 15) and the fourth pad 241 of the fourth terminal 24, and the first electrode 151 and the first electrode 151 of the temperature detection diode 15 are joined to each other. It is conductive with the 4 terminals 24.
- the second wire 62 is joined to the second electrode 152 of the switching element 1 (temperature detection diode 15) and the fifth pad 251 of the fifth terminal 250, and the second electrode 152 and the second electrode 152 of the temperature detection diode 15 are joined to each other. It conducts with the 5-terminal 250.
- the semiconductor device A5 includes a first terminal 21, a second terminal 22, and a third terminal 23 corresponding to three terminals of a gate terminal, a source terminal, and a drain terminal, and also includes a fourth terminal 24 and a fifth terminal 250. ..
- the switching element 1 includes a temperature detection diode 15, and the first electrode 151 of the temperature detection diode 15 is conducting with the fourth terminal 24 via the first wire 61.
- the second electrode 152 of the temperature detection diode 15 is conducting to the fifth terminal 250 via the second wire 62.
- a current is passed through the temperature detection diode 15 by using the fourth terminal 24 and the fifth terminal 250 which are conductive to the temperature detection diode 15 to measure the voltage, and the temperature of the resistance change of the diode depends on the temperature.
- the junction temperature of the switching element 1 can be measured. Further, in the present embodiment, by providing the dedicated fourth terminal 24 and fifth terminal 250 for conducting the temperature detection diode 15, the switching element 1 is driven and the junction is used by using the temperature detection diode 15. The temperature can be measured.
- the semiconductor device according to the present disclosure is not limited to the above-described embodiment.
- the specific configuration of each part of the semiconductor device according to the present disclosure can be freely redesigned.
- FIGS. 17 and 18 are diagrams showing a modification of the semiconductor device according to the third embodiment.
- the second electrode 152 for example, the cathode electrode or the anode electrode
- the temperature sensor (diode for temperature detection) 15 is the drain electrode 131 of the switching element 1. It was shared with. That is, the second electrode 152 and the drain electrode 131 are directly bonded to each other without the intervention of individual connecting members such as wires, or the second electrode 152 and the drain electrode 131 are integrally formed with each other. rice field.
- one electrode of the temperature sensor 15 (cathode electrode 152 in the illustrated example) is directly connected to the source electrode 133 of the element on the upper surface of the switching element 1. That is, in the semiconductor device A6, the cathode electrode 152 and the source electrode 133 are shared in the chip.
- a diode 150 provided on the main surface of the SiC substrate is used as the temperature sensor 15 (see FIG. 18).
- the temperature sensor 15 includes a cathode made of polysilicon doped with p-type impurities and an anode made of polysilicon doped with n-type impurities.
- An insulating film is formed between the SiC substrate and the temperature sensor 15, but the illustration is omitted.
- a gate electrode 132 is formed in the active region of the SiC substrate via a gate insulating film.
- the active region includes a source region doped with n-type impurities and a body region doped with p-type impurities, but the illustration is omitted.
- An interlayer insulating film is formed on the surface of the SiC substrate, and a source electrode 133 made of a metal such as aluminum is formed on the interlayer insulating film.
- the gate electrode 132 is electrically separated from the source electrode 133, the source region, and the body region by an interlayer insulating film and a gate insulating film.
- the source electrode 133 is electrically connected to the source region and the body region of the SiC substrate via an opening provided in the interlayer insulating film.
- An anode electrode 151 and a cathode electrode 152 are formed on the upper part of the temperature sensor 15.
- the anode electrode 151 and the cathode electrode 152 are electrically connected to the anode and cathode of the diode through the openings of the interlayer insulating film, respectively.
- the cathode electrode 152 is shared with the source electrode 133.
- the cathode electrode 152 and the source electrode 133 are electrically connected to each other via an intermediate conductive connecting portion 152a.
- the cathode electrode 152, the intermediate connecting portion 152a, and the source electrode 133 are integrally formed of the same conductive material as a whole, and the dotted lines described to show the boundaries between these members in FIGS. 17 and 18 are for convenience. It is a thing. Unless otherwise specified, the configuration of the semiconductor device A6 is the same as the configuration of the semiconductor device A2 of the second embodiment shown in FIGS. 9 to 11, except that the two electrodes are shared. Therefore, the description of common members will be omitted.
- a temperature sensor that is, a terminal 42 and a terminal 44 conducting with the temperature detection diode 15 are used to pass a current through the temperature detection diode 15 to measure the voltage, and the resistance change of the diode.
- the junction temperature of the switching element 1 can be measured by utilizing the temperature dependence of. Further, in this modification, by providing the dedicated terminal 44 for conducting the temperature detection diode 15, the junction temperature can be measured by using the temperature detection diode 15 while driving the switching element 1. ..
- the source electrode 133 and the source terminal 42 are connected by a wire 53, but a metal plate made of copper (for example, a long metal piece having a rectangular cross section) may be used instead of the wire 53. good.
- the source electrode 133 and the source terminal 42 and the metal plate are joined via a joining material such as solder.
- the connection between the gate electrode 132 and the gate terminal 41 and the connection between the anode electrode 151 and the terminal 44 may be performed by the wire 52 and the wire 61, or a metal plate may be used instead of the wires 52 and 61. It may be connected using.
- the source electrode 133 and the source terminal 42 are joined via a metal plate, it is preferable that a nickel-plated layer or a nickel / palladium / gold-plated layer is formed on the source electrode 133 (and thus the cathode electrode 152). .. In this case, the same plating structure as that of the source electrode 133 is formed on the anode electrode 151 and the gate electrode 132.
- Appendix 1 The gate electrode and the back surface of the element facing opposite sides in the first direction, and a drain electrode, a gate electrode, and a source electrode are provided, and a potential difference is applied between the drain electrode and the source electrode.
- a switching element whose on / off control is performed between the drain electrode and the source electrode by applying a drive voltage between the source electrodes, and A base having a front surface and a back surface facing each other in the first direction and supporting the switching element so that the back surface of the element faces the front surface.
- a first terminal, a second terminal, a third terminal, and a fourth terminal, each of which extends in a second direction perpendicular to the first direction, are provided.
- the switching element includes a temperature detection diode having a first electrode arranged on the element main surface.
- the drain electrode, the gate electrode, and the source electrode are electrically connected to any of the first terminal, the second terminal, and the third terminal, respectively.
- Appendix 2. The first terminal, the second terminal, the third terminal, and the fourth terminal extend along one side of the second direction and are perpendicular to both the first direction and the second direction. They are located apart from each other in the third direction The first terminal and the second terminal are located on the outermost side opposite to each other in the third direction, and the third terminal is located between the first terminal and the second terminal in the third direction.
- the semiconductor device according to Appendix 1 wherein the fourth terminal is located between the second terminal and the third terminal.
- Appendix 3. The temperature detection diode has a second electrode and has a second electrode.
- Appendix 4. The first distance between the first terminal and the third terminal in the third direction is the second distance between the third terminal and the fourth terminal in the third direction, and the fourth terminal and the second terminal.
- the gate electrode and the source electrode are arranged on the main surface of the element, and the drain electrode is arranged on the back surface of the element.
- Appendix 13 The semiconductor device according to any one of Supplementary note 2 to 11, further comprising a substrate having a surface conductive layer constituting the base and an insulating layer on which the surface conductive layer is laminated. Appendix 14.
- the tip of at least one side of the fourth terminal in the second direction is more than the tip of one of the first terminal, the second terminal and the third terminal in the first direction.
- Appendix 15. The first terminal, the second terminal, and the fourth terminal are arranged on one side of the second direction and separated from each other in a third direction which is perpendicular to both the first direction and the second direction. And are arranged The third terminal is arranged on the other side of the second direction.
- the semiconductor device according to Appendix 1 wherein the gate electrode is conducting to the first terminal, the source electrode is conducting to the second terminal, and the drain electrode is conducting to the third terminal.
- the temperature detection diode has a second electrode and has a second electrode.
- a fifth terminal extending to the one side in the second direction is provided.
- the temperature detection diode has a second electrode and has a second electrode.
- the semiconductor device according to any one of Supplementary note 1 to 18, further comprising a sealing resin that covers the base, parts of the first to fourth terminals, and the switching element.
- Appendix 20 The semiconductor device according to any one of Supplementary note 1 to 19, wherein the switching element is a SiC switching element.
- Appendix 21 It includes a switching element, a first external terminal, a second external terminal, a third external terminal, and a fourth external terminal.
- the switching element is The element main surface and element back surface facing opposite sides in the first direction,
- the first main electrode source electrode / emitter electrode
- the gate electrode arranged on the main surface of the element and
- the second main electrode drain electrode / collector electrode
- a diode for temperature detection with an anode and a cathode It has a first electrode that is electrically connected to one of the anode and the cathode and is arranged on the main surface of the device.
- the first external terminal is electrically connected to the second main electrode.
- the second external terminal is electrically connected to the gate electrode.
- the third external terminal is electrically connected to the first main electrode.
- the fourth external terminal is electrically connected to the first electrode.
- the anode is electrically connected to one of the first external terminal and the fourth external terminal
- the cathode is electrically connected to the other of the first external terminal and the fourth external terminal.
- Appendix 21 further includes a sealing resin that seals the switching element and also seals a part of each of the first external terminal, the second external terminal, the third external terminal, and the fourth external terminal.
- Appendix 23. A first conductive member that connects the first main electrode and the third external terminal to each other, A second conductive member that connects the gate electrode and the second external terminal to each other,
- the first conductive member, the second conductive member, and the third conductive member are either a bonding wire or a metal plate, the bonding wire is made of either aluminum or copper, and the metal plate is formed of the metal plate.
- Appendix 27 By applying a driving voltage between the gate electrode and the first main electrode while a potential difference is applied between the first main electrode and the second main electrode, the first main electrode and the second main electrode can be separated from each other.
- the semiconductor device according to any one of Supplementary note 21 to Supplementary note 26, which has a configuration in which on / off control is performed.
- Appendix 28 The semiconductor device according to any one of Supplementary note 21 to Supplementary note 27, further comprising a base portion facing the back surface of the element and supporting the switching element.
- Appendix 29 It includes a switching element, a first external terminal, a second external terminal, a third external terminal, and a fourth external terminal.
- the switching element is The element main surface and element back surface facing opposite sides in the first direction,
- the first main electrode source electrode / emitter electrode
- the gate electrode arranged on the main surface of the element and
- the second main electrode drain electrode / collector electrode
- a diode for temperature detection with an anode and a cathode It has a first electrode that is electrically connected to one of the anode and the cathode and is arranged on the main surface of the device.
- the first external terminal is electrically connected to the second main electrode.
- the second external terminal is electrically connected to the gate electrode.
- the third external terminal is electrically connected to the first main electrode.
- the fourth external terminal is electrically connected to the first electrode.
- the anode is electrically connected to one of the third external terminal and the fourth external terminal
- the cathode is electrically connected to the other of the third external terminal and the fourth external terminal.
- Appendix 29 further comprises a sealing resin that seals the switching element and also seals a part of each of the first external terminal, the second external terminal, the third external terminal, and the fourth external terminal.
- Appendix 31. A first conductive member that connects the first main electrode and the third external terminal to each other, A second conductive member that connects the gate electrode and the second external terminal to each other,
- the first conductive member, the second conductive member, and the third conductive member are either a bonding wire or a metal plate, the bonding wire is made of either aluminum or copper, and the metal plate is formed of the metal plate.
- Appendix 35 By applying a driving voltage between the gate electrode and the first main electrode in a state where a potential difference is applied between the first main electrode and the second main electrode, the first main electrode and the second main electrode can be separated from each other.
- the semiconductor device according to any one of Supplementary note 29 to Supplementary note 34, which has a configuration in which on / off control is performed.
- Appendix 36 The semiconductor device according to any one of Appendix 29 to Appendix 35, further comprising a base that faces the back surface of the element and supports the switching element.
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Abstract
Description
第1方向において互い反対側を向く素子主面および素子裏面と、ドレイン電極、ゲート電極およびソース電極と、を有し、前記ドレイン電極および前記ソース電極間に電位差を与えた状態で前記ゲート電極および前記ソース電極間に駆動電圧を与えることによって、前記ドレイン電極および前記ソース電極間がオン/オフ制御されるスイッチング素子と、
前記第1方向において互いに反対側を向く表面および裏面を有し、前記素子裏面が前記表面に向かい合うように前記スイッチング素子を支持する基部と、
各々が前記第1方向に対して直角である第2方向に延出する第1端子、第2端子、第3端子および第4端子と、を備え、
前記スイッチング素子は、前記素子主面に配置された第1電極を有する温度検出用ダイオードを備え、
前記ドレイン電極、前記ゲート電極および前記ソース電極は、各々、前記第1端子、前記第2端子および前記第3端子のいずれかと導通しており、
前記第1電極は、第1ワイヤを介して前記第4端子と導通している、半導体装置。
付記2.
前記第1端子、前記第2端子、前記第3端子および前記第4端子は、前記第2方向の一方側に沿って延び、且つ前記第1方向および前記第2方向のいずれにも直角である第3方向において互いに離間して配置されており、
前記第1端子および前記第2端子は、前記第3方向において互いに反対側の最も外側に位置し、前記第3端子は、前記第3方向において前記第1端子と前記第2端子との間に位置し、前記第4端子は、前記第2端子と前記第3端子との間に位置する、付記1に記載の半導体装置。
付記3.
前記温度検出用ダイオードは第2電極を有し、
前記第2電極は、前記第1端子、前記第2端子および前記第3端子のいずれかと導通している、付記2に記載の半導体装置。
付記4.
前記第1端子と前記第3端子との前記第3方向における第1距離は、前記第3端子と前記第4端子との前記第3方向における第2距離、および前記第4端子と前記第2端子との前記第3方向における第3距離よりも大である、付記3に記載の半導体装置。
付記5.
前記ゲート電極は前記第1端子に導通しており、前記ソース電極は前記第2端子に導通しており、前記ドレイン電極は前記第3端子に導通している、付記4に記載の半導体装置。
付記6.
前記第2電極は、前記第2端子に導通している、付記5に記載の半導体装置。
付記7.
前記ドレイン電極は前記第1端子に導通しており、前記ゲート電極は前記第2端子に導通しており、前記ソース電極は前記第3端子に導通している、付記4に記載の半導体装置。
付記8.
前記第2電極は、前記第3端子に導通している、付記7に記載の半導体装置。
付記9.
前記第2電極は、前記素子主面に配置されており、第2ワイヤを介して前記第1端子、前記第2端子および前記第3端子のいずれかと導通している、付記3または4に記載の半導体装置。
付記10.
前記第2電極は、前記素子裏面に配置されている、付記3または4に記載の半導体装置。
付記11.
前記ゲート電極および前記ソース電極は前記素子主面に配置され、前記ドレイン電極は前記素子裏面に配置されており、
前記ゲート電極および前記ソース電極は、ゲートワイヤおよびソースワイヤを介して前記第1端子、前記第2端子および前記第3端子のいずれかと導通している、付記2ないし4のいずれかに記載の半導体装置。
付記12.
前記基部および前記第3端子を含むリードフレームを備え、前記第3端子は、前記基部から前記第2方向に沿って延出する、付記2ないし11のいずれかに記載の半導体装置。
付記13.
前記基部を構成する表面導電層と、当該表面導電層が積層された絶縁層と、を有する基板を備える、付記2ないし11のいずれかに記載の半導体装置。
付記14.
前記第4端子のうち少なくとも前記第2方向における前記一方側の先端部は、前記第1端子、前記第2端子および前記第3端子それぞれの前記第1方向における前記一方側の先端部よりも、前記第1方向において前記基部の前記表面が向く側に偏倚している、付記2ないし13のいずれかに記載の半導体装置。
付記15.
前記第1端子、前記第2端子および前記第4端子は、前記第2方向の一方側に配置され、且つ記第1方向および前記第2方向のいずれにも直角である第3方向において互いに離間して配置されており、
前記第3端子は、前記第2方向の他方側に配置されており、
前記ゲート電極は前記第1端子に導通しており、前記ソース電極は前記第2端子に導通しており、前記ドレイン電極は前記第3端子に導通している、付記1に記載の半導体装置。
付記16.
前記温度検出用ダイオードは第2電極を有し、
前記第2電極は、前記第2端子に導通している、付記15に記載の半導体装置。
付記17.
前記第2方向の前記一方側に延出する第5端子を備え、
前記温度検出用ダイオードは第2電極を有し、
前記第2電極は、前記第5端子に導通している、付記15に記載の半導体装置。
付記18.
前記基部および前記第3端子を含むリードフレームを備え、前記第3端子は、前記基部から前記第2方向の前記他方側に延出する、付記15ないし17のいずれかに記載の半導体装置。
付記19.
前記基部、前記第1ないし第4端子の一部ずつおよび前記スイッチング素子を覆う封止樹脂を備える、付記1ないし18のいずれかに記載の半導体装置。
付記20.
前記スイッチング素子は、SiCスイッチング素子である、付記1ないし19のいずれかに記載の半導体装置。
付記21.
スイッチング素子と、第1外部端子と、第2外部端子と、第3外部端子と、第4外部端子と、を備えており、
前記スイッチング素子は、
第1方向において互い反対側を向く素子主面および素子裏面と、
前記素子主面に配置された第1主電極(ソース電極/エミッタ電極)と、
前記素子主面に配置されたゲート電極と、
前記素子裏面に配置された第2主電極(ドレイン電極/コレクタ電極)と、
アノードおよびカソードを有する温度検出用ダイオードと、
前記アノードおよびカソードの一方に電気的に接続されるとともに前記素子主面に配置された第1電極と、を有しており、
前記第1外部端子は、前記第2主電極に電気的に接続されており、
前記第2外部端子は、前記ゲート電極に電気的に接続されており、
前記第3外部端子は、前記第1主電極に電気的に接続されており、
前記第4外部端子は、前記第1電極に電気的に接続されており、
前記アノードは、前記第1外部端子および前記第4外部端子の一方と電気的に接続され、前記カソードは、前記第1外部端子および前記第4外部端子の他方と電気的に接続される、半導体装置。
付記22.
前記スイッチング素子を封止するとともに、前記第1外部端子、前記第2外部端子、前記第3外部端子および前記第4外部端子の各々の一部を封止する封止樹脂をさらに備える、付記21に記載の半導体装置。
付記23.
前記第1主電極と前記第3外部端子とを相互に接続する第1導電部材と、
前記ゲート電極と前記第2外部端子とを相互に接続する第2導電部材と、
前記第1電極と前記第4外部端子とを相互に接続する第3導電部材と、をさらに備える、付記21または付記22に記載の半導体装置。
付記24.
前記第1導電部材、前記第2導電部材および前記第3導電部材は、ボンディングワイヤまたは金属板のいずれか一方であり、前記ボンディングワイヤはアルミニウムまたは銅のいずれか一方から構成され、前記金属板は銅から構成される、付記23に記載の半導体装置。
付記25.
前記金属板を接合対象に固定するための接合部材をさらに備える、付記24に記載の半導体装置。
付記26.
前記接合部材は、半田からなる、付記25に記載の半導体装置。
付記27.
前記第1主電極および前記第2主電極間に電位差を与えた状態で前記ゲート電極および前記第1主電極間に駆動電圧を与えることによって、前記第1主電極および前記第2主電極間がオン/オフ制御される構成である、付記21ないし付記26のいずれかに記載の半導体装置。
付記28.
前記素子裏面に対向し且つ前記スイッチング素子を支持する基部をさらに備える、付記21ないし付記27のいずれかに記載の半導体装置。
付記29.
スイッチング素子と、第1外部端子と、第2外部端子と、第3外部端子と、第4外部端子と、を備えており、
前記スイッチング素子は、
第1方向において互い反対側を向く素子主面および素子裏面と、
前記素子主面に配置された第1主電極(ソース電極/エミッタ電極)と、
前記素子主面に配置されたゲート電極と、
前記素子裏面に配置された第2主電極(ドレイン電極/コレクタ電極)と、
アノードおよびカソードを有する温度検出用ダイオードと、
前記アノードおよびカソードの一方に電気的に接続されるとともに前記素子主面に配置された第1電極と、を有しており、
前記第1外部端子は、前記第2主電極に電気的に接続されており、
前記第2外部端子は、前記ゲート電極に電気的に接続されており、
前記第3外部端子は、前記第1主電極に電気的に接続されており、
前記第4外部端子は、前記第1電極に電気的に接続されており、
前記アノードは、前記第3外部端子および前記第4外部端子の一方と電気的に接続され、前記カソードは、前記第3外部端子および前記第4外部端子の他方と電気的に接続される、半導体装置。
付記30.
前記スイッチング素子を封止するとともに、前記第1外部端子、前記第2外部端子、前記第3外部端子および前記第4外部端子の各々の一部を封止する封止樹脂をさらに備える、付記29に記載の半導体装置。
付記31.
前記第1主電極と前記第3外部端子とを相互に接続する第1導電部材と、
前記ゲート電極と前記第2外部端子とを相互に接続する第2導電部材と、
前記第1電極と前記第4外部端子とを相互に接続する第3導電部材と、をさらに備える、付記29または付記30に記載の半導体装置。
付記32.
前記第1導電部材、前記第2導電部材および前記第3導電部材は、ボンディングワイヤまたは金属板のいずれか一方であり、前記ボンディングワイヤはアルミニウムまたは銅のいずれか一方から構成され、前記金属板は銅から構成される、付記31に記載の半導体装置。
付記33.
前記金属板を接合対象に固定するための接合部材をさらに備える、付記32に記載の半導体装置。
付記34.
前記接合部材は、半田からなる、付記33に記載の半導体装置。
付記35.
前記第1主電極および前記第2主電極間に電位差を与えた状態で前記ゲート電極および前記第1主電極間に駆動電圧を与えることによって、前記第1主電極および前記第2主電極間がオン/オフ制御される構成である、付記29ないし付記34のいずれかに記載の半導体装置。
付記36.
前記素子裏面に対向し且つ前記スイッチング素子を支持する基部をさらに備える、付記29ないし付記35のいずれかに記載の半導体装置。
1:スイッチング素子 11:素子主面 12:素子裏面
131:ドレイン電極 132:ゲート電極
133:ソース電極 15:温度検出用ダイオード
150:pn接合ダイオード部 151:第1電極
152:第2電極 2:リードフレーム 2A:基板
20:ダイパッド(基部) 20a:表面
20b:裏面 20c:貫通孔 21:第1端子
22:第2端子 23:第3端子 24:第4端子
250:第5端子 211:第1パッド 221:第2パッド
231:第3パッド 241:第4パッド 251:第5パッド
212,222,232,242,252:先端部
213:中間屈曲部 233:中間屈曲部 243:屈曲部
25:絶縁層 26:表面導電層 26a:表面
26b:裏面 261:ドレイン電極部 263:ソース電極部
27:裏面金属層 3:接合材 41:第1端子
42:第2端子 43:第3端子 44:第4端子
411,421,431,441:接合部
412,422,432,442:屈曲部
413,423,433,443:先端部
444:屈曲部 52:ゲートワイヤ 53:ソースワイヤ
61:第1ワイヤ 62:第2ワイヤ 7:封止樹脂
71:樹脂主面 72:樹脂裏面 73:樹脂第1側面
74:樹脂第2側面 75:凹部 76:樹脂貫通孔
C1,C2,C3,C4:中心線 d13:第1距離
d24:第3距離 d34:第2距離
x:第3方向 y:第2方向 z:第1方向
Claims (20)
- 第1方向において互い反対側を向く素子主面および素子裏面と、ドレイン電極、ゲート電極およびソース電極と、を有し、前記ドレイン電極および前記ソース電極間に電位差を与えた状態で前記ゲート電極および前記ソース電極間に駆動電圧を与えることによって、前記ドレイン電極および前記ソース電極間がオン/オフ制御されるスイッチング素子と、
前記第1方向において互いに反対側を向く表面および裏面を有し、前記素子裏面が前記表面に向かい合うように前記スイッチング素子を支持する基部と、
各々が前記第1方向に対して直角である第2方向に延出する第1端子、第2端子、第3端子および第4端子と、を備え、
前記スイッチング素子は、前記素子主面に配置された第1電極を有する温度検出用ダイオードを備え、
前記ドレイン電極、前記ゲート電極および前記ソース電極は、各々、前記第1端子、前記第2端子および前記第3端子のいずれかと導通しており、
前記第1電極は、第1ワイヤを介して前記第4端子と導通している、半導体装置。 - 前記第1端子、前記第2端子、前記第3端子および前記第4端子は、前記第2方向の一方側に沿って延び、且つ前記第1方向および前記第2方向のいずれにも直角である第3方向において互いに離間して配置されており、
前記第1端子および前記第2端子は、前記第3方向において互いに反対側の最も外側に位置し、前記第3端子は、前記第3方向において前記第1端子と前記第2端子との間に位置し、前記第4端子は、前記第2端子と前記第3端子との間に位置する、請求項1に記載の半導体装置。 - 前記温度検出用ダイオードは第2電極を有し、
前記第2電極は、前記第1端子、前記第2端子および前記第3端子のいずれかと導通している、請求項2に記載の半導体装置。 - 前記第1端子と前記第3端子との前記第3方向における第1距離は、前記第3端子と前記第4端子との前記第3方向における第2距離、および前記第4端子と前記第2端子との前記第3方向における第3距離よりも大である、請求項3に記載の半導体装置。
- 前記ゲート電極は前記第1端子に導通しており、前記ソース電極は前記第2端子に導通しており、前記ドレイン電極は前記第3端子に導通している、請求項4に記載の半導体装置。
- 前記第2電極は、前記第2端子に導通している、請求項5に記載の半導体装置。
- 前記ドレイン電極は前記第1端子に導通しており、前記ゲート電極は前記第2端子に導通しており、前記ソース電極は前記第3端子に導通している、請求項4に記載の半導体装置。
- 前記第2電極は、前記第3端子に導通している、請求項7に記載の半導体装置。
- 前記第2電極は、前記素子主面に配置されており、第2ワイヤを介して前記第1端子、前記第2端子および前記第3端子のいずれかと導通している、請求項3または4に記載の半導体装置。
- 前記第2電極は、前記素子裏面に配置されている、請求項3または4に記載の半導体装置。
- 前記ゲート電極および前記ソース電極は前記素子主面に配置され、前記ドレイン電極は前記素子裏面に配置されており、
前記ゲート電極および前記ソース電極は、ゲートワイヤおよびソースワイヤを介して前記第1端子、前記第2端子および前記第3端子のいずれかと導通している、請求項2ないし4のいずれかに記載の半導体装置。 - 前記基部および前記第3端子を含むリードフレームを備え、
前記第3端子は、前記基部から前記第2方向に沿って延出する、請求項2ないし11のいずれかに記載の半導体装置。 - 前記基部を構成する表面導電層と、当該表面導電層が積層された絶縁層と、を有する基板を備える、請求項2ないし11のいずれかに記載の半導体装置。
- 前記第4端子のうち少なくとも前記第2方向における前記一方側の先端部は、前記第1端子、前記第2端子および前記第3端子それぞれの前記第1方向における前記一方側の先端部よりも、前記第1方向において前記基部の前記表面が向く側に偏倚している、請求項2ないし13のいずれかに記載の半導体装置。
- 前記第1端子、前記第2端子および前記第4端子は、前記第2方向の一方側に配置され、且つ記第1方向および前記第2方向のいずれにも直角である第3方向において互いに離間して配置されており、
前記第3端子は、前記第2方向の他方側に配置されており、
前記ゲート電極は前記第1端子に導通しており、前記ソース電極は前記第2端子に導通しており、前記ドレイン電極は前記第3端子に導通している、請求項1に記載の半導体装置。 - 前記温度検出用ダイオードは第2電極を有し、
前記第2電極は、前記第2端子に導通している、請求項15に記載の半導体装置。 - 前記第2方向の前記一方側に延出する第5端子を備え、
前記温度検出用ダイオードは第2電極を有し、
前記第2電極は、前記第5端子に導通している、請求項15に記載の半導体装置。 - 前記基部および前記第3端子を含むリードフレームを備え、
前記第3端子は、前記基部から前記第2方向の前記他方側に延出する、請求項15ないし17のいずれかに記載の半導体装置。 - 前記基部、前記第1ないし第4端子の一部ずつおよび前記スイッチング素子を覆う封止樹脂を備える、請求項1ないし18のいずれかに記載の半導体装置。
- 前記スイッチング素子は、SiCスイッチング素子である、請求項1ないし19のいずれかに記載の半導体装置。
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| US20250343092A1 (en) | 2025-11-06 |
| JPWO2021221042A1 (ja) | 2021-11-04 |
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