WO2014108277A1 - Reflektorwanne für ein optoelektronisches halbleiterbauteil - Google Patents
Reflektorwanne für ein optoelektronisches halbleiterbauteil Download PDFInfo
- Publication number
- WO2014108277A1 WO2014108277A1 PCT/EP2013/076736 EP2013076736W WO2014108277A1 WO 2014108277 A1 WO2014108277 A1 WO 2014108277A1 EP 2013076736 W EP2013076736 W EP 2013076736W WO 2014108277 A1 WO2014108277 A1 WO 2014108277A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optoelectronic semiconductor
- semiconductor chip
- semiconductor component
- lead frame
- reflector trough
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/852—Encapsulations
- H10H20/853—Encapsulations characterised by their shape
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
- H10H20/856—Reflecting means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/857—Interconnections, e.g. lead-frames, bond wires or solder balls
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/83—Electrodes
- H10H20/831—Electrodes characterised by their shape
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/8506—Containers
-
- H10W70/424—
-
- H10W72/536—
-
- H10W72/5363—
-
- H10W90/756—
Definitions
- An optoelectronic semiconductor component is specified.
- An object to be solved is to provide an optoelectronic semiconductor device, which is a spatially close
- the lead frame is for an electrical contact of the
- Ladder frame formed from a sheet metal semifinished product.
- the leadframe of the semiconductor device has two or more than two
- Ladder frame parts consists.
- the at least one semiconductor chip is set up to generate electromagnetic radiation. For example, during operation of the semiconductor chip generated ultraviolet radiation, visible light or near-infrared radiation.
- the semiconductor chip is preferably a light-emitting diode or else a laser diode.
- the optoelectronic semiconductor chip further semiconductor chips or electronic components in the
- Semiconductor component to be installed for example, to protect against damage to electrostatic discharges or for the detection of radiation, such as a photodiode or a
- Optoelectronic semiconductor chip on a first of the
- this includes
- the potting body is permeable to the radiation generated in the optoelectronic semiconductor chip.
- the potting body is preferably produced by means of pressing, casting and / or spraying.
- the potting body is preferably a one-piece body, with a homogeneity within the scope of manufacturing tolerances
- Lead frame parts are firmly anchored in the potting, so that the lead frame parts in the intended Do not loosen the use of the semiconductor device from or from the potting body.
- the potting body is for beam shaping that of the optoelectronic
- the potting body is locally formed as a lens, in particular as a converging lens. It is possible that in parts of the potting
- the potting body but also be free of optically active coatings.
- the potting body can at least in places with a
- Antireflection coating be provided.
- the semiconductor component is arranged on a reflector trough.
- the reflector tray includes a bottom surface.
- Floor surface may, within the manufacturing tolerances, be a flat, smooth surface. It is the semiconductor chip
- the lateral surface is subdivided into three or more than three subregions.
- the subareas revolve, viewed in plan view of the reflector trough, the bottom surface each preferably completely.
- the subregions, seen in plan view preferably formed as a continuous rings.
- the subregions of the lateral surface follow in the direction away from the bottom surface
- a first section is located next to the bottom surface and with ascending numbering are the
- Partial area which is located closest to the floor surface, oriented perpendicular or substantially perpendicular to the bottom surface.
- Substantially perpendicular may mean that the lateral surface in the first subarea with a tolerance of at most 10 ° or with a tolerance of at most 5 ° or with a tolerance of at most 2 ° perpendicular to the
- Floor surface is oriented.
- the first subregion projects beyond the semiconductor chip, in the direction away from the semiconductor chip
- the optoelectronic semiconductor chip is completely surrounded by the first subregion along a lateral direction.
- the optoelectronic semiconductor chip is then in a kind of pot, which is formed by the bottom surface and the first portion. The semiconductor chip does not protrude beyond this pot.
- the lateral surface in the second partial region has a different gradient than the lateral surface in the third partial region.
- the slope in the second partial area is smaller than the gradient in the third partial area.
- the slope is an angle to a Lot to the bottom surface, with a
- Lotline preferably on a center of the bottom surface, seen in plan view, is related.
- the slopes of the second and third portion are preferably different from 0 ° and 90 °.
- a diameter of the reflector trough preferably increases monotonically or strictly monotonically.
- the subregions merge into one another like a kink.
- an edge formed between the subregions may mean that a radius of curvature present due to manufacture is at most 0.3 mm or at most 0.2 mm.
- the semiconductor component is therefore a so-called SMT component.
- SMT component Semiconductor component surface mountable.
- the semiconductor component is therefore a so-called SMT component.
- the semiconductor device can be placed on a mounting surface for electrical contacting.
- the ladder frame parts do not penetrate the mounting surface. In at least one embodiment, this includes
- Optoelectronic semiconductor device a lead frame with at least two lead frame parts and at least one optoelectronic semiconductor chip.
- the optoelectronic semiconductor chip is mounted on a first of the lead frame parts and is for generating a radiation
- a radiation-permeable potting body of the semiconductor device mechanically connects the leadframe parts with each other.
- the potting body is set up for beam shaping of the radiation.
- the first lead frame part has a reflector trough with a bottom surface on which the
- the reflector trough further has a lateral surface which comprises at least three partial regions. Revolve in a plan view of the floor surface the subregions surround and follow the ground surface, in
- the lateral surface is oriented with a tolerance of at most 10 ° perpendicular to the bottom surface.
- the first subregion preferably projects beyond the semiconductor chip, in the direction away from the semiconductor chip
- the semiconductor device is surface mountable.
- Semiconductor component can be a high proportion of radiation of the
- Reflector trough especially in combination with the matching molded potting body.
- a proportion of the first subarea at an overall height of the reflector pan is at least 15% or at least 20%.
- the total height refers here to an extension of the reflector trough, starting from the bottom surface and in the direction perpendicular to the bottom surface to an edge facing away from the bottom surface of the farthest from the bottom surface portion.
- Sub-sector not exceeding 35% or not exceeding 30% or not exceeding 25%.
- the proportion of the second portion of the total height of the reflector trough is at least 20% or at least 25% or at least 30% or at least 35%. This proportion may alternatively or additionally be no more than 60%, no more than 55% or no more than 50%.
- the proportion of the third portion of the total height of the reflector trough is at least 20% or at least 25% or at least 30%. Alternatively or additionally, this proportion is at most 50% or at most 45% or at most 40%.
- the proportion of the second partial area in the total height is greater than the proportion of the third partial area.
- the proportion of the second portion is at least a 1.2-compartment or at least a 1.3-compartment of the portion of the third
- the slopes of the second and third subareas differ by at least 3 ° or at least 5 ° or at least 7 ° from one another. Alternatively or additionally, this difference is at most 25 ° or at most 20 ° or at most 15 °.
- the first portion may also be formed as a portion of a cylinder jacket.
- the subregions preferably have no curved surfaces, in cross section perpendicular to
- the pitch of the second portion is at least 25 ° or at least 30 ° or at least 35 °. Alternatively or additionally, this slope is at most 50 ° or at most 45 ° or at most 40 °. The slope here is based on the solder to the bottom surface. According to at least one embodiment, the pitch of the third portion is at least 25 ° or at least 30 ° or at least 35 °. Alternatively or additionally, this slope is at most 45 ° or at most 40 ° or at most 50 °.
- a diameter or a mean diameter of the bottom surface is at least 1.1 times or at least 1.2 times a length of a diagonal of a main radiation side of the
- the main radiation side is here
- the side of the semiconductor chip which faces away from the bottom surface. It is possible that the diameter of the
- Floor area not more than 1,7 times or not more than 1,6 Times or at most 1.5 times the diagonal length of the main radiation side.
- the diameter of the bottom surface is at least 0.5 mm or at least 0.6 mm. Alternatively or additionally, this diameter is at most 1.0 mm or at most 0.85 mm or at most 0.75 mm.
- the total height of the reflector trough is at least 0.3 mm or at least 0.4 mm or at least 0.5 mm. Alternatively or additionally, the total height is at most 1.5 mm or at most 1.2 mm or at most 1.0 mm.
- the total height of the reflector trough is at least twice or
- the diameter of the bottom surface is greater than the total height of the reflector trough.
- the diameter exceeds the overall height by at least a factor of 1.05 or by at least a factor of 1.1 and / or by at most a factor of 1.8 or by at most a factor of 1.5.
- the semiconductor chip is connected to the second leadframe part with an electrical connection means.
- the connection means is, for example, a bonding wire.
- Connecting means can also be through several bonding wires or be formed by an electrical bridge, in particular to protect against damage by electrostatic discharges.
- the lateral surface of the reflector trough extends at a constant height and continuously around the bottom surface.
- the lateral surface is free of recesses, cutouts or
- the potting body is in one of the reflector trough along a
- the lens is spaced from the leadframe. A distance along the
- the main beam direction, between the lens and the lead frame, for example, is at least a 0.6-bin or
- the lens has an edge region and a central region.
- the edge region surrounds, seen in plan view, the central region preferably all around.
- the lens can be rotationally symmetrical.
- the lens is formed in the central region as a partial surface of an ellipsoid of revolution. A large half-axis corresponds to this
- the lens is shaped as a cone in the edge region.
- the edge region has an outer boundary surface, which is a part of a cone sheath.
- a diameter of the central region is at least 0.7 times or at least 0.75 times a maximum diameter of the lens. Alternatively or additionally, the diameter of the central region is at most 0.9 times or 0.85 times the maximum lens diameter.
- a height of the edge region is at least 1.5 times or at
- the height of the edge region is at most 3.5 times or at most 3.0 times the height of the central region.
- the expansions of the corresponding regions along the main emission direction are taken to be the heights.
- At least the lateral surfaces of the reflector trough are in places or
- the coating comprises one or more of the following
- the leadframe is formed of a copper alloy.
- the alloy preferably allows a degree of deformation of at least 3 or of
- the degree of deformation is the quotient of a maximum height of the reflector and a thickness of the raw material.
- the maximum height of the reflector is composed of a thickness of the reflector trough on the bottom surface and the total height of the reflector trough.
- the lead frame is formed of an alloy Cu-ETP, CU-Fe2P, CuCrSiTi, according to EN designation.
- the potting body is formed of an epoxy or an epoxy-silicone hybrid material.
- an average thickness of the leadframe, in particular in regions outside the reflector well is at least 70 ⁇ or at least 90 ⁇ or at least 100 ⁇ . This thickness may alternatively or additionally be at most 300 ⁇ or at most 250 ⁇ or at most 200 ⁇ .
- Potting body seen in plan view of the bottom surface, external dimensions or an edge length of at most 6 mm or not more than 5 mm. Alternatively or additionally, a maximum expansion of the potting body along the
- Cuboid does not exclude that side surfaces are slightly different from a cuboid shape, for example with a
- a maximum diameter of the reflector trough is 2.5 mm or 2.0 mm.
- the diameter of the reflector trough can be at least 0.8 mm or at least 1.0 mm.
- Boundary surfaces of the potting body outwardly only in the direction perpendicular to the main emission direction
- Piercing points of the lead frame parts through the lateral boundary surface of the Potting bodies are preferably surrounded by a material of the potting body.
- the reflector trough can be completely surrounded by a material of the potting body.
- a bottom of the reflector pan it is possible for a bottom of the reflector pan to be improved
- thermal contact protrudes from the potting or flush with the potting closes.
- the potting body surrounds and / or encloses the semiconductor chip directly.
- the potting body can touch the semiconductor chip in places.
- the semiconductor chip is completely surrounded by the potting body together with the
- the semiconductor chip can, in
- Figures 1 to 3 are schematic representations of
- Figure 4 is a schematic representation of a
- FIGS. 5 and 6 are schematic representations of
- FIG. 1A shows in a perspective illustration and in FIG. 1B a sectional view of an exemplary embodiment of an optoelectronic semiconductor component 1.
- the semiconductor device 1 has a lead frame 2 with two
- the first lead frame part 23 has a reflector trough 25 in which a
- the semiconductor chip 3 is, for example, a
- Light-emitting diode that emits radiation in the spectral range around 800 nm.
- the semiconductor chip 3 is electrically connected to the second lead frame part 24 via a connection means 4, which is a bonding wire.
- the bonding wire 4 extends out of the reflector trough 25 and engages via side walls of the reflector trough 25 over to the second conductor frame part 24.
- the semiconductor device 1 includes a potting body 5. Directly around the lead frame 2 around the potting body 5 is approximately cuboid. In a region arranged downstream of a main emission direction 35, the potting body 5 is shaped as a lens 50. For better Anchoring the lead frame 2 in the potting 5, the lead frame parts 23, 24 projections and / or openings.
- the reflector trough 25 is shaped and matched to the lens 50, so that a narrow spectral emission of the semiconductor device 1 can be achieved. This is a
- Jacket surface of the reflector pan 25 which surrounds the bottom surface 26 all around, in three subregions 27, 28, 29th
- the first partial area 27 closest to the floor surface 26 has surfaces oriented approximately perpendicular to the floor surface 26 and facing the semiconductor chip 3.
- the second portion 28 closes at the first
- Partial region 27 directly on and is, compared to the third portion 29, with a lower slope
- the partial regions 27, 28, 29 are approximately in the shape of a kink in one another.
- the partial regions 27, 28, 29, seen in the sectional representation according to FIG. 1B, are each manufactured with straight-running boundary surfaces facing the semiconductor chip 3.
- the lens 50 has a distance A to the subregions 23,
- the distance A is for example at least
- the lens 50 has a central region 53 and an edge region 52.
- Edge region 52 is truncated cone-shaped and surrounds central region 53 all around. A height B of the edge region 52, starting from the cuboid-shaped part of the
- Potting body 5 for example, is at least 0.6 mm and / or at most 0.9 mm.
- adjoining central region 53 is, for example, at least 0.3 mm and / or at most 0.8 mm.
- Diameter D of the central portion 53 is, for example at least 2.0 mm and / or at most 2.9 mm.
- a diameter E of the lens 50 at a transition region between the lens 50 and the cuboid part is, for example, at least 2.2 mm and / or at most 3.1 mm.
- the central area 53 is, as seen in cross-section, as
- Shaped section of an ellipse Shaped section of an ellipse.
- a small semiaxis has a length of at most
- Half axis is aligned parallel to the main emission direction 35.
- the numerical values mentioned are only to be understood as examples and can be scaled to each other.
- Reflector trough 25 is not filled with a material of the potting body 5, but with a further, not shown filling, for example with a silicone. In this further filling, not shown, optically active ingredients such as phosphors, scattering or
- the lens 50 is made of a radiation-transparent material and the cuboid part of a
- radiopaque material shaped.
- FIGS. 2A, 3A each show a side view and in FIGS. 2B, 3B respectively a sectional view along the section line marked in FIGS. 2A, 3A.
- the reflector troughs 25 may each have a potting body 5, as described in connection with FIG. 1, for example.
- the reflector trough 25 according to FIG. 2 is set up for a spatially narrow emission characteristic.
- the second portion 28 has a pitch of 40 ° and the third portion 29 a slope of 35 °.
- a predominant radiation component is emitted in an angular range of +/- 10 ° around the main emission direction 35.
- the slope of the second portion 28 is also at 40 °.
- the slope of the third portion 29 is 25 °.
- Semiconductor component 1 according to FIG. 3 is a predominant one
- Predominantly may mean more than 50% or more than 70% or more than 80%.
- FIG. 2B The abovementioned absolute values can, for example, be within a factor 2 or within a factor 3 apply, taking into account preferably the ratios of the individual sizes to each other. The same applies to FIG. 3.
- FIG. 4 shows a radiation characteristic of FIG
- Beam R starting from a main radiation side 30 of the semiconductor chip 3, drawn. Due to the
- Reflector pan 25 a concentration of the radiation R is carried out to the lens 50.
- a concentration of the radiation R is carried out to the lens 50.
- At the edge region 52 is a
- Central area 53 is a relatively small
- Main emission direction 35 a relative intensity I and an integrated over the angle luminous flux ⁇ applied.
- An intensity maximum is at an angle of about 8 °.
- Radial LED is marked with r. typical
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- Led Device Packages (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/653,835 US9318678B2 (en) | 2013-01-08 | 2013-12-16 | Reflecto trough for an optoelectronic semiconductor component |
| JP2015551151A JP2016502289A (ja) | 2013-01-08 | 2013-12-16 | オプトエレクトロニクス半導体コンポーネント用のトラフ型反射体 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013100121.1 | 2013-01-08 | ||
| DE102013100121.1A DE102013100121B4 (de) | 2013-01-08 | 2013-01-08 | Optoelektronisches Halbleiterbauteil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014108277A1 true WO2014108277A1 (de) | 2014-07-17 |
Family
ID=49876579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2013/076736 Ceased WO2014108277A1 (de) | 2013-01-08 | 2013-12-16 | Reflektorwanne für ein optoelektronisches halbleiterbauteil |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9318678B2 (de) |
| JP (1) | JP2016502289A (de) |
| DE (1) | DE102013100121B4 (de) |
| WO (1) | WO2014108277A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015105137A1 (de) * | 2015-04-02 | 2016-10-06 | Osram Opto Semiconductors Gmbh | Optoelektronisches Bauelement |
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- 2013-12-16 JP JP2015551151A patent/JP2016502289A/ja active Pending
- 2013-12-16 WO PCT/EP2013/076736 patent/WO2014108277A1/de not_active Ceased
- 2013-12-16 US US14/653,835 patent/US9318678B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| US20150349222A1 (en) | 2015-12-03 |
| JP2016502289A (ja) | 2016-01-21 |
| DE102013100121A1 (de) | 2014-07-10 |
| US9318678B2 (en) | 2016-04-19 |
| DE102013100121B4 (de) | 2025-08-14 |
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