WO2009141906A1 - 試験用ウエハユニットおよび試験システム - Google Patents
試験用ウエハユニットおよび試験システム Download PDFInfo
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- WO2009141906A1 WO2009141906A1 PCT/JP2008/059389 JP2008059389W WO2009141906A1 WO 2009141906 A1 WO2009141906 A1 WO 2009141906A1 JP 2008059389 W JP2008059389 W JP 2008059389W WO 2009141906 A1 WO2009141906 A1 WO 2009141906A1
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- wafer
- test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2855—Environmental, reliability or burn-in testing
- G01R31/2872—Environmental, reliability or burn-in testing related to electrical or environmental aspects, e.g. temperature, humidity, vibration, nuclear radiation
- G01R31/2874—Environmental, reliability or burn-in testing related to electrical or environmental aspects, e.g. temperature, humidity, vibration, nuclear radiation related to temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2855—Environmental, reliability or burn-in testing
- G01R31/286—External aspects, e.g. related to chambers, contacting devices or handlers
- G01R31/2863—Contacting devices, e.g. sockets, burn-in boards or mounting fixtures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2855—Environmental, reliability or burn-in testing
- G01R31/286—External aspects, e.g. related to chambers, contacting devices or handlers
- G01R31/2865—Holding devices, e.g. chucks; Handlers or transport devices
- G01R31/2867—Handlers or transport devices, e.g. loaders, carriers, trays
Definitions
- the present invention relates to a test wafer unit and a test system including the test wafer unit.
- the present invention relates to a test wafer unit having a temperature distribution adjustment unit that adjusts the temperature distribution of a semiconductor wafer on which a plurality of semiconductor chips are formed, and a test system including the test wafer unit.
- the apparatus includes a probe card that can be electrically connected to a plurality of semiconductor chips on a semiconductor wafer in a lump, and can test a plurality of semiconductor chips at the same time.
- the temperature of the semiconductor chip may increase as compared to the surrounding semiconductor chip under test. is there. In this case, the temperature of the surrounding semiconductor chip also rises, so there is a problem that the semiconductor chip around the semiconductor chip in which the overcurrent has occurred cannot be tested under the same temperature conditions as other semiconductor chips.
- an object of the present invention is to provide a test wafer unit that can solve the above-mentioned problems and a test system including the test wafer unit. This object is achieved by a combination of features described in the independent claims.
- the dependent claims define further advantageous specific examples of the present invention.
- a test wafer unit electrically connected to a plurality of chips to be tested formed on a wafer to be tested, facing the wafer to be tested.
- a test wafer unit comprising: a connection wafer electrically connected to each chip under test; and a temperature distribution adjustment unit provided on the connection wafer for adjusting the temperature distribution of the test wafer.
- the test wafer unit is arranged to face the wafer under test and is electrically connected to each chip under test.
- a test system including a connection wafer and a temperature distribution adjustment unit that is provided on the connection wafer and adjusts the temperature distribution of the wafer under test.
- FIG. 4 is a view showing another example of the cross section of the unit cell 111-1 of the connecting wafer 110 and the chip under test 310-1 of the wafer under test 300.
- FIG. 4 is a view showing another example of the cross section of the unit cell 111-1 of the connecting wafer 110 and the chip under test 310-1 of the wafer under test 300.
- FIG. 4 is a view showing another example of the cross section of the unit cell 111-1 of the connecting wafer 110 and the chip under test 310-1 of the wafer under test 300.
- FIG. 3 is a block diagram illustrating a functional configuration example of a test circuit 130.
- FIG. 3 is a cross-sectional view showing a configuration example of a probe device 200 provided in a chamber 20 of a test system 400.
- FIG. 6 is a schematic diagram illustrating another configuration example of a test system 400.
- 2 is a diagram showing an example of a cross section of a unit cell 151-1 of a circuit wafer 150, a unit cell 111-1 of a connection wafer 110, and a chip under test 310-1 of a wafer under test 300.
- FIG. FIG. 5 is a diagram showing another example of cross sections of the unit cell 151-1, the unit cell 111-1, and the chip under test 310-1.
- FIG. 5 is a diagram showing another example of cross sections of the unit cell 151-1, the unit cell 111-1, and the chip under test 310-1.
- FIG. 5 is a diagram showing another example of cross sections of the unit cell 151-1, the unit cell 111-1, and the chip under test 310-1.
- FIG. 6 is a cross-sectional view showing another configuration example of the probe apparatus 200 provided in the chamber 20 of the test system 400.
- FIG. 1 is a diagram showing an outline of a test system 400 according to one embodiment of the present invention.
- the test system 400 tests a plurality of semiconductor chips (hereinafter referred to as “chips to be tested”) to be tested on a wafer under test 300 on which a plurality of semiconductor chips are formed.
- the test system 400 may test a plurality of wafers 300 to be tested in parallel.
- the test system 400 includes a control device 10, a plurality of chambers 20 (20-1, 20-2, 20-3, 20-4), a transfer device 40, and a wafer cassette 60.
- the control device 10 controls the test system 400.
- the control device 10 may control the chamber 20, the transfer device 40, and the wafer cassette 60.
- Each of the plurality of chambers 20 sequentially receives a wafer under test 300 to be tested, and tests the wafer under test 300 inside the chamber 20.
- Each chamber 20 may independently test the wafer under test 300. That is, each chamber 20 may test the wafer under test 300 without synchronizing with the other chambers 20.
- the wafer cassette 60 stores a plurality of wafers 300 to be tested.
- the transfer device 40 transfers each wafer under test 300 stored in the wafer cassette 60 into one of the vacant chambers 20. Further, the transfer device 40 may unload the wafer under test 300 that has been tested from the chamber 20 and store it in the wafer cassette 60.
- FIG. 2 is a schematic diagram illustrating a configuration example of a test system 400 according to an embodiment of the present invention.
- the test system 400 of the present embodiment tests a wafer under test 300 on which a plurality of chips under test 310 (310-1, 310-2,...) Are formed as shown in FIG.
- the plurality of chips to be tested 310 may be formed on the wafer to be tested 300 by using a semiconductor process such as exposure.
- the test wafer unit 100 includes a connection wafer 110 and a temperature distribution adjustment unit 120.
- the connecting wafer 110 is arranged to face the wafer under test 300.
- the connecting wafer 110 includes a plurality of unit cells 111 (111-1, 111-2,...) Provided at positions corresponding to the plurality of chips to be tested 310 on the wafer to be tested 300. Therefore, for example, in the probe apparatus 200 described later provided in the chamber 20 of the test system 400, when the test wafer unit 100 and the wafer under test 300 are electrically connected, for example, the unit cell 111- in the connection wafer 110 is used. One terminal and the pad of the chip to be tested 310-1 on the wafer to be tested 300 are electrically connected.
- the control device 10 tests each chip under test 310 on the wafer under test 300 via the connection wafer 110.
- the control device 10 may supply a test signal to each chip under test 310 via the test wafer unit 100.
- the control device 10 receives a response signal output from each chip under test 310 according to the test signal via the test wafer unit 100, and determines pass / fail of each chip under test 310 based on the response signal. You can do it.
- the temperature distribution adjustment unit 120 adjusts the temperature distribution of the wafer under test 300. Specifically, when the temperature distribution adjusting unit 120 tests a plurality of chips to be tested 310 on the wafer to be tested 300 using a probe device 200 described later, for example, an overcurrent or a specific current in the chip to be tested 310 is detected. A local temperature change of the wafer under test 300 caused by a current interruption or the like is detected, and the temperature distribution of the wafer under test 300 is adjusted to alleviate the local temperature change.
- the temperature distribution adjusting unit 120 is illustrated separately from the connection wafer 110 in FIG. 2, but may be provided on the connection wafer 110.
- the temperature distribution adjusting unit 120 may be, for example, an individual temperature adjusting unit 121 described later provided corresponding to a plurality of chips 310 to be tested, and is a control circuit that controls each individual temperature adjusting unit 121. May be.
- a pattern may be formed on the connection wafer 110 by etching or the like.
- FIG. 3 is a view showing an example of a cross section of the unit cell 111-1 of the connection wafer 110 and the chip under test 310-1 of the wafer under test 300.
- the unit cell 111-1 in the connecting wafer 110 and the chip to be tested 310-1 facing the unit cell 111-1 in the wafer under test 300 are extracted and shown. Since the unit cells 111 other than the unit cell 111-1 shown in FIG. 3 have the same configuration, description thereof is omitted. Further, since the chips to be tested 310 other than the chip to be tested 310-1 have the same configuration, the description thereof is omitted.
- the unit cell 111-1 includes an individual temperature adjustment unit 121 and a test circuit 130.
- the individual temperature adjustment unit 121 includes a control circuit 122, a heater 123, and a temperature sensor 124.
- the control circuit 122 and the test circuit 130 are provided on the back surface of the unit cell 111-1 facing the chip 310 to be tested (hereinafter referred to as the “upper surface 112 of the unit cell 111-1”).
- the heater 123 is provided on the surface of the unit cell 111-1 facing the chip under test 310-1 (hereinafter referred to as “the lower surface 113 of the unit cell 111-1”).
- a device side pad 114 is provided on the upper surface 112 of the unit cell 111-1. Further, a wafer under test pad 115 is provided on the lower surface 113 of the unit cell 111-1 at a position corresponding to the terminal 312 provided on the upper surface of the chip under test 310-1. Further, the unit cell 111-1 is provided with a plurality of vias 117 (117-1, 117-2, 117-3) penetrating from the upper surface 112 to the lower surface 113.
- the control circuit 122 is electrically connected to the heater 123 through the pattern wiring 116 and the via 117-3.
- the control circuit 122 is electrically connected to the temperature sensor 124 via the pattern wiring 116 and the via 117-2.
- the test circuit 130 is electrically connected to the device side pad 114 via the pattern wiring 116.
- the test circuit 130 also includes a device under test provided on the lower surface 113 of the unit cell 111-1 via the via 117-1 provided through the unit cell 111-1 from the device side pad 114 and the pattern wiring 116.
- the wafer side pad 115 is also electrically connected.
- the wafer under test pad 115 is close to the terminal 312.
- the tips of the heater 123 and the temperature sensor 124 are close to the upper surface of the chip under test 310-1.
- the test system 400 tests the plurality of chips to be tested including the chip to be tested 310-1.
- the test circuit 130 transmits a predetermined test signal to the chip under test 310-1 via the terminal 312 and receives a response signal from the chip under test 310-1 via the terminal 312. .
- the control circuit 122 of the individual temperature adjustment unit 121 detects information corresponding to the power consumption of the chip under test 310-1 via the terminal 312 of the chip under test 310-1.
- the control circuit 122 may detect the surface temperature of the chip under test 310-1 measured by the temperature sensor 124.
- the control circuit 122 controls the heater 123 based on the detected surface temperature of the chip under test 310-1. For example, if the detected surface temperature of the chip under test 310-1 is lower than a predetermined temperature, the control circuit 122 uses the heater 123 until the temperature of the chip under test 310-1 becomes higher than the predetermined temperature.
- Heat 310-1 may be, for example, a reference value of a temperature reached by a non-defective chip under test 310 due to heat generated by a current during a test, or a lower limit value of a management width determined based on the reference value. .
- FIG. 4 is a view showing another example of the cross section of the unit cell 111-1 of the connection wafer 110 and the chip under test 310-1 of the wafer under test 300.
- the control circuit 122 is electrically connected to the heater 123 and the test circuit 130.
- control circuit 122 detects the current consumption of the chip under test 310-1 in the state under test based on the value of the current flowing through the test circuit 130. Then, the control circuit 122 controls the heater 123 based on the detected current consumption.
- control circuit 122 heats the chip to be tested 310-1 with the heater 123 when the detected current consumption is smaller than a predetermined value. Specifically, for example, when the chip under test 310 is heated to a predetermined temperature by a current flowing through the non-defective chip under test 310, the control circuit 122 detects the chip under test 310-1 in which the current interruption has occurred. Heating is performed by the heater 123 until the temperature becomes substantially equal to the predetermined temperature.
- control circuit 122 may adjust the current supplied to the chip under test 310-1 when the detected surface temperature is larger than a predetermined value. That is, in this case, by reducing the current applied to the chip under test 310-1, the magnitude of the current flowing through the chip under test 310-1 is substantially equal to the magnitude of the current detected from the non-defective chip under test. Adjust to a level that is equal to or less than that. At this time, for example, the control circuit 122 may output a signal indicating that the current supplied to the chip under test 310-1 should be reduced to the control device 10, and output the signal to the test circuit 130. It may be output.
- FIG. 5 is a diagram showing another example of the cross section of the unit cell 111-1 of the connection wafer 110 and the chip under test 310-1 of the wafer under test 300. This example differs from the above examples described with reference to FIGS. 3 and 4 in that the individual temperature adjustment unit 121 does not include the heater 123 and the temperature sensor 124.
- control circuit 122 detects the current consumption of the chip under test 310-1 in the state under test based on the value of the current flowing through the test circuit 130. Then, the control circuit 122 adjusts the current supplied to the chip under test 310 based on the detected current consumption.
- the control circuit 122 increases the current supplied to the chip under test 310 to increase the magnitude of the current flowing through the chip under test 310. May be adjusted to a level approximately equal to the magnitude of the current detected from the non-defective chip under test.
- the control circuit 122 reduces the current applied to the chip under test 310 to reduce the magnitude of the current flowing through the chip under test 310. May be adjusted to a level substantially equal to the magnitude of the current detected from the chip under test.
- control circuit 122 may output a signal indicating that the current supplied to the chip under test 310 should be adjusted to the control device 10, and may output the signal to the test circuit 130. Also good.
- the individual temperature adjustment unit 121 can be used even when an overcurrent or a current interruption occurs in the chip under test 310-1 due to a failure of the chip under test 310-1 during the test.
- the surface temperature of the chip under test 310-1 or the current applied to the chip under test 310-1 is adjusted so that the temperature of the chip is substantially equal to the temperature of the chip under test.
- individual temperature adjustment units corresponding to the respective chips to be tested 310 are also provided. Performs temperature adjustment.
- each chip under test 310 of the wafer under test 300 is hardly affected by temperature change even when an overcurrent or current interruption occurs in the plurality of chips under test 310-1 during the test. A test is performed. Therefore, the test accuracy of each chip under test 310 is improved.
- FIG. 6 is a block diagram illustrating a functional configuration example of the test circuit 130.
- the test circuit 130 includes a pattern generation unit 522, a waveform shaping unit 530, a driver 532, a comparator 534, a timing generation unit 536, a logic comparison unit 538, a characteristic measurement unit 540, and a power supply unit 542.
- the test circuit 130 may have the configuration shown in FIG. 6 for each input / output pin of the chip under test 310 to be connected. These structures may be formed on the connection wafer 110 by a semiconductor process such as exposure.
- the pattern generator 522 generates a logic pattern of the test signal.
- the pattern generation unit 522 of this example includes a pattern memory 524, an expected value memory 526, and a fail memory 528.
- the pattern generator 522 may output a logical pattern stored in advance in the pattern memory 524.
- the pattern memory 524 may store a logical pattern given from the control device 10 before the test is started.
- the pattern generator 522 may generate the logical pattern based on an algorithm given in advance.
- the waveform shaping unit 530 shapes the waveform of the test signal based on the logical pattern given from the pattern generation unit 522.
- the waveform shaping unit 530 may shape the waveform of the test signal by outputting a voltage corresponding to each logic value of the logic pattern for each predetermined bit period.
- the driver 532 outputs a test signal corresponding to the waveform given from the waveform shaping unit 530.
- the driver 532 may output a test signal in accordance with the timing signal given from the timing generator 536.
- the driver 532 may output a test signal having the same cycle as the timing signal.
- the test signal output from the driver 532 is supplied to the corresponding chip under test 310 via the wafer under test pad 115 or the like.
- the comparator 534 measures the response signal output from the chip under test 310.
- the comparator 534 may measure the logical pattern of the response signal by sequentially detecting the logical value of the response signal in accordance with the strobe signal given from the timing generator 536.
- the logic comparison unit 538 functions as a determination unit that determines pass / fail of the corresponding chip under test 310 based on the logic pattern of the response signal measured by the comparator 534. For example, the logic comparison unit 538 may determine pass / fail of the chip under test 310 based on whether or not the expected value pattern given from the pattern generation unit 522 matches the logic pattern detected by the comparator 534.
- the pattern generation unit 522 may supply the expected value pattern stored in advance in the expected value memory 526 to the logic comparison unit 538.
- the expected value memory 526 may store a logical pattern given from the control device 10 before the test is started.
- the pattern generation unit 522 may generate the expected value pattern based on an algorithm given in advance.
- the fail memory 528 stores the comparison result in the logic comparison unit 538.
- the fail memory 528 may store the pass / fail judgment result in the logic comparison unit 538 for each address of the chip under test 310.
- the control device 10 may read the pass / fail judgment result stored in the fail memory 528.
- the apparatus-side pad 114 may output the pass / fail determination result stored in the fail memory 528 to the outside of the test wafer unit 100, for example, the control apparatus 10.
- the characteristic measurement unit 540 measures the voltage or current waveform output from the driver 532.
- the characteristic measurement unit 540 functions as a determination unit that determines the quality of the chip under test 310 based on whether the waveform of the current or voltage supplied from the driver 532 to the chip under test 310 satisfies a predetermined specification. It's okay.
- the power supply unit 542 supplies power for driving the chip under test 310.
- the power supply unit 542 may supply power to the chip under test 310 according to the power supplied from the control device 10 during the test. Further, the power supply unit 542 may supply driving power to each component of the test circuit 130.
- test circuit 130 Since the test circuit 130 has such a configuration, a test system in which the scale of the control device 10 is reduced can be realized.
- a general-purpose personal computer or the like can be used as the control device 10.
- FIG. 7 is a cross-sectional view showing a configuration example of the probe apparatus 200 provided in the chamber 20 of the test system 400.
- the probe apparatus 200 is electrically connected to the wafer under test 300, for example, and passes a signal to and from the wafer under test 300 in response to a control signal from the control apparatus 10. Test wafer 300 is tested.
- the probe apparatus 200 includes a test wafer unit 100, a wafer-side seal portion 224, a wafer tray 226, a wafer stage 228, and a decompression portion 234.
- the test wafer unit 100 includes a connection wafer 110, a wiring substrate 202, a support unit 204, a device-side anisotropic conductive sheet 212, a device-side seal portion 214, a wafer-side anisotropic conductive sheet 218, a membrane 222, and a fixed portion.
- a ring 220 is included.
- the wafer under test 300 to be tested is, for example, a disk-shaped semiconductor substrate, and more specifically, may be silicon, a compound semiconductor, or another semiconductor substrate.
- the wafer under test 300 is placed on the wafer tray 226 in the probe apparatus 200. Further, the wafer under test 300 may have a plurality of pads on the surface.
- the wiring board 202 is a board in which wiring and terminals are formed on a printed board, for example, and has a plurality of terminals on the lower surface.
- the connection wafer 110 may be a semiconductor substrate having a shape corresponding to the wafer under test 300, and is disposed between the wiring substrate 202 and the wafer under test 300 so as to face the wafer under test 300.
- the connection wafer 110 is circular, semicircular, fan-shaped or the like having substantially the same diameter as the wafer under test 300 or a larger diameter than the wafer under test 300. It may be a semiconductor substrate having the following shape.
- the shape of the connecting wafer 110 is not limited to this as long as it is a shape facing at least a part of the upper surface of the wafer under test 300.
- Pads are provided at positions corresponding to the plurality of terminals of the wiring board 202 on the upper surface of the connection wafer 110, that is, the surface on the wiring board 202 side. Further, on the lower surface of the connecting wafer 110, that is, on the surface on the wafer under test 300 side, terminals (hereinafter referred to as “test wafer side terminals”) are provided at positions corresponding to pads provided on the upper surface of the wafer under test 300. Provided. When a terminal is provided on the upper surface of the wafer under test 300, it is preferable that a pad is provided on the lower surface of the connecting wafer 110 in place of the terminal.
- the apparatus-side anisotropic conductive sheet 212 is disposed between the wiring board 202 and the connection wafer 110.
- the device-side anisotropic conductive sheet 212 is formed of a conductive sheet material for a portion pressed with a predetermined pressure or more.
- the device-side anisotropic conductive sheet 212 is pressed between the terminals of the wiring substrate 202 and the pads provided on the surface of the connection wafer 110 on the wiring substrate 202 side, thereby electrically connecting the terminals to the pads. Connect to.
- the wafer side anisotropic conductive sheet 218 is disposed below the connection wafer 110.
- the wafer-side anisotropic conductive sheet 218 is formed of, for example, a conductive sheet material for a portion pressed with a predetermined pressure or more.
- the wafer side anisotropic conductive sheet 218 is pressed between a terminal provided on the surface of the connection wafer 110 on the side of the wafer under test 300 and a bump pad of the membrane 222 described later, so that each terminal-pad is connected. Are electrically connected.
- the membrane 222 is, for example, a disk-shaped semiconductor substrate having a larger diameter than the connection wafer 110, and is disposed between the wafer side anisotropic conductive sheet 218 and the wafer under test 300.
- the membrane 222 may have bump pads that electrically connect the wafer side connection terminals of the connection wafer 110 and the pads of the wafer under test 300.
- the membrane 222 is provided with a through hole 242 that penetrates from the wafer side anisotropic conductive sheet 218 side to the wafer under test 300 side.
- the fixing ring 220 is, for example, a ring-shaped elastic member, and is provided along the peripheral edge of the membrane 222 on the lower surface of the membrane 222.
- the outer diameter of the fixing ring 220 may be substantially equal to the outer diameter of the membrane 222, and the inner diameter may be larger than the diameters of a wafer-side seal portion 224 and a wafer under test 300 described later.
- the support unit 204 is fixed to a frame or the like of the probe device 200, and holds the fixing ring 220, the membrane 222, and the wiring board 202.
- the apparatus-side anisotropic conductive sheet 212, the connecting wafer 110, and the wafer-side anisotropic conductive sheet 218 are held at predetermined positions together with the membrane 222 and the wiring substrate 202.
- the device-side seal portion 214 is, for example, a ring-shaped elastic member, and is provided so as to surround the connection wafer 110 between the wiring substrate 202 and the membrane 222.
- the wafer-side seal portion 224 is, for example, a ring-shaped elastic member, and is arranged on the upper surface of the wafer tray 226 so as to surround the outer periphery of the wafer under test 300. Further, one end of the wafer-side seal portion 224 is fixed to the upper surface of the wafer tray 226, and the other end is formed in a lip shape so that the annular diameter increases as the distance from the upper surface of the wafer tray 226 increases. Good. When the wafer tray 226 is pressed against the membrane 222, the other end of the wafer side seal portion 224 is bent in contact with the lower surface of the membrane 222.
- the wafer stage 228 holds the wafer tray 226. Further, the wafer stage 228 can move the wafer tray 226 at least in the vertical direction, that is, in the direction approaching or separating from the wiring substrate 202.
- the decompression unit 234 includes a decompressor 236 and a decompressor 238.
- the decompressor 236 is connected to an air intake path 232 for a sealed space in which one opening is formed in a portion of the upper surface of the wafer tray 226 where the wafer 300 to be tested is not placed.
- the semiconductor wafer decompressor 238 is connected to a semiconductor wafer intake path 230 in which one opening is formed in a portion of the upper surface of the wafer tray 226 where the wafer 300 to be tested is placed.
- the wafer stage 228 moves the wafer tray 226 to the membrane 222 side, whereby the wafer side seal portion 224 is moved. The upper end of the is closely attached to the membrane 222. At this time, a sealed space surrounded by the wiring substrate 202, the wafer tray 226, the apparatus-side seal 214, the membrane 222, and the wafer-side seal 224 is formed around the connection wafer 110 and the wafer under test 300.
- the membrane 222 is disposed at a position that partitions the sealed space.
- the sealed space is an integral space.
- the decompressor 236 decompresses the inside of the sealed space by sucking air through the air intake path 232 for the sealed space.
- the sealed space including the space closer to the wiring substrate 202 than the membrane 222 and the space closer to the wafer tray 226 than the membrane 222 is included. The inside can be decompressed efficiently.
- the inside of the sealed space is decompressed by the decompressor 236, whereby the test wafer unit 100 and the wafer tray 226 are pressed against each other, and the wafer under test 300 is pressed against the membrane 222. Then, the wiring board 202 moves while the membrane 222 contracts the device-side seal 214, and the wiring substrate 202, the device-side anisotropic conductive sheet 212, the connection wafer 110, and the wafer-side anisotropic conductive sheet 218 are moved. Are held in contact with each other.
- the terminals provided on the lower surface of the wiring board 202 and the pads provided on the upper surface of the connection wafer 110 are electrically connected via the device-side anisotropic conductive sheet 212. Further, the terminals provided on the lower surface of the connecting wafer 110 and the pads provided on the upper surface of the wafer under test 300 are electrically connected via the wafer side anisotropic conductive sheet 218 and the bump pads of the membrane 222. .
- the decompressor 238 sucks the semiconductor wafer intake path 230 at substantially the same timing as the intake operation by the decompressor 236, for example. As a result, the wafer under test 300 is attracted to the wafer tray 226.
- the probe apparatus 200 performs a test on the wafer under test 300 in a state where the pressure reduction by the pressure reducer 236 and the pressure reducer 238 is completed.
- FIG. 8 is a schematic diagram showing another configuration example of the test system 400.
- the same referential mark is attached and explanation is omitted.
- the connection wafer 110 includes a connection wafer 110, a circuit wafer 150, and a temperature distribution adjusting unit 120.
- the circuit wafer 150 is provided to face the connection wafer 110.
- the circuit wafer 150 includes a plurality of unit cells 151 (151-1, 151) provided at positions corresponding to the plurality of unit cells 111 (111-1, 111-2,...) In the connection wafer 110. -2, ). Therefore, in the probe apparatus 200, when the test wafer unit 100 and the wafer under test 300 are electrically connected as described above, the circuit wafer 150 is electrically connected to the wafer under test 300 via the connection wafer 110. Connected.
- the control device 10 may test each chip under test 310 by supplying a test signal to each chip under test 310 of the wafer under test 300 via the circuit wafer 150 and the connection wafer 110. Further, the control device 10 receives a response signal output by each chip under test 310 in response to the test signal via the connection wafer 110 and the circuit wafer 150, and each chip under test 310 based on the response signal. It may be judged whether or not.
- FIG. 9 is a diagram showing an example of a cross section of the unit cell 151-1 of the circuit wafer 150, the unit cell 111-1 of the connection wafer 110, and the chip under test 310-1 of the wafer under test 300.
- the unit cell 151-1 of the circuit wafer 150, the unit cell 111-1 of the connection wafer 110, and the chip to be tested 310-1 of the wafer under test 300 are extracted. Show. In FIG. 9, about the same configuration as that described with reference to FIG. 3 to FIG.
- control circuit 122 and the test circuit 130 are provided on the back surface of the unit cell 151-1 facing the unit cell 111-1 (hereinafter referred to as “the upper surface 152 of the unit cell 151-1”). Further, a heater 123 and a temperature sensor 124 are provided on the lower surface 113 of the unit cell 111-1, that is, the back surface of the unit cell 111-1 that faces the unit cell 151-1.
- a device side pad 158 is provided on the upper surface 152 of the unit cell 151-1.
- the lower surface 153 of the unit cell 151-1 is located at a position corresponding to the plurality of circuit wafer side pads 118 (118-1, 118-2, 118-3) provided on the upper surface 112 of the unit cell 111-1.
- Connection wafer side pads 159 (159-1, 159-2, 159-3) are provided.
- a wafer-under-test pad 119 is provided on the lower surface 113 of the unit cell 111-1 at a position corresponding to the terminal 312 provided on the upper surface of the chip under test 310-1.
- the unit cell 151-1 is provided with a plurality of vias 157 (157-1, 157-2, 157-3) penetrating from the upper surface 152 to the lower surface 153.
- the unit cell 111-1 is provided with a plurality of vias 117 (117-1, 117-2, 117-3) penetrating from the upper surface 112 to the lower surface 113.
- the wafer under test pad 119 When testing the wafer under test 300, the wafer under test pad 119 is close to the terminal 312. The tips of the heater 123 and the temperature sensor 124 are close to the upper surface of the chip under test 310-1. Further, the plurality of connection wafer side pads 159 are close to the corresponding circuit wafer side pads 118. That is, for example, the wafer side pad 159-1 is close to the circuit wafer side pad 118-1.
- control circuit 122 causes the heater 123 to pass through the pattern wiring 156, the via 157-3, the connection wafer side pad 159-1, the circuit wafer side pad 118-1, the pattern wiring 116, and the via 117-3. And electrically connected.
- the control circuit 122 also includes a temperature sensor 124 via the pattern wiring 156, the via 157-2, the connection wafer side pad 159-2, the circuit wafer side pad 118-2, the pattern wiring 116, and the via 117-2. Connect electrically.
- the test circuit 130 is connected to the chip under test via the pattern wiring 156, the via 157-1, the connection wafer side pad 159-1, the circuit wafer side pad 118-1, the pattern wiring 116, and the via 117-1. It is electrically connected to the terminal 312 of 310-1.
- each unit cell 151 of the circuit wafer 150, each unit cell 111 of the connection wafer 110, and each chip to be tested 310 of the wafer under test 300 are unit cells 151-1, unit cells.
- the test is performed on each of the chips to be tested 310 of the wafer to be tested 300 while being electrically connected in the same manner as the chips 111-1 and the chip to be tested 310-1. Further, during the test, the surface temperature of each chip under test 310-1 is detected, and the heater 123 is controlled based on the detection result. The detection of the surface temperature and the control of the heater 123 are the same as those described with reference to FIG.
- the test wafer unit 100 includes a connection wafer 110 and a circuit wafer 150 disposed on the opposite side of the connection wafer 110 from the wafer 300 to be tested.
- a heater 123 is provided on the surface of the connection wafer 110 facing the wafer under test 300, and a control circuit 122 and a test circuit 130 are provided on the surface of the circuit wafer 150 far from the test wafer 300. Thereby, the control circuit 122 and the test circuit 130 are less likely to be affected by heat radiation from the heater 123.
- FIG. 10 is a diagram showing another example of the cross section of the unit cell 151-1, the unit cell 111-1, and the chip under test 310-1.
- a plurality of terminals 312 (312-1, 312-2, 312-3) are provided on the upper surface of the chip to be tested 310-1 in the wafer to be tested 300. Further, on the lower surface 153 of the unit cell 151-1 in the circuit wafer 150, a plurality of connection wafer-side pads 159 (159) at a different pitch from the plurality of terminals 312 (312-1, 312-2, 312-3). -1, 159-2, 159-3).
- connection wafer 110 On the other hand, on the upper surface 112 of the unit cell 111-1 of the connection wafer 110, a plurality of circuit wafers are provided at positions corresponding to the plurality of connection wafer side pads 159 (159-1, 159-2, 159-3). Side pads 118 (118-1, 118-2, 118-3) are provided. On the lower surface 113 of the unit cell 111-1, a plurality of wafer pads 119 (119-1, 119) at positions corresponding to the plurality of terminals 312 (312-1, 312-2, 312-3) are provided. -2, 119-3).
- each circuit wafer-side pad 118 is electrically connected to the corresponding wafer-side pad 119 to be tested.
- the circuit wafer side pad 118-1 is electrically connected to the wafer under test pad 119-1 through the pattern wiring 116 and the via 117-1.
- connection wafer 110 for changing the pitch is provided between them.
- the circuit wafer 150 and the pad-terminal of the wafer under test 300 can be electrically connected.
- the connection wafer 110 for converting the pitch as in this example it is not necessary to provide the circuit wafer 150 for each wafer under test 300 having different terminal arrangements. Rise.
- FIG. 11 is a view showing another example of the cross section of the unit cell 151-1, the unit cell 111-1, and the chip to be tested 310-1.
- components substantially the same as those described with reference to FIGS. 3 to 5, FIG. 9, FIG. 10, and the like are denoted by the same reference numerals and description thereof is partially omitted.
- the configuration described with reference to FIG. 9 does not include the temperature sensor 124, pattern wiring, pads, vias, and the like for electrically connecting the temperature sensor 124 and the control circuit 122.
- the control circuit 122 is electrically connected to the test circuit 130 via the pattern wiring 156.
- control circuit 122 detects the current consumption of the chip under test 310-1 in a state where the test is being performed based on the value of the current flowing through the test circuit 130. Then, the control circuit 122 controls the heater 123 based on the detected current consumption.
- the detection and control are the same as the detection and control in the configuration described with reference to FIG.
- connection wafer side pads 159 of the unit cell 151-1 and the terminals 312 of the chip under test 310-1 do not correspond to each other. That is, when the circuit wafer 150 and the wafer under test 300 are brought close to each other with the corresponding unit cell 151 and the chip under test 310 aligned, the connection wafer side pad 159 and the terminal 312 are directly connected. I can't let you. However, by providing the connection wafer 110 between the circuit wafer 150 and the wafer under test 300 for connection between pads and terminals provided at different positions, the connection wafer side pads 159 and the terminals 312 are connected. It can be electrically connected.
- FIG. 12 is a diagram showing another example of a cross section of the unit cell 151-1, the unit cell 111-1, and the chip to be tested 310-1.
- components substantially the same as those described with reference to FIGS. 3 to 5, FIG. 9 to FIG.
- the configuration described with reference to FIG. 11 does not include the heater 123 and pattern wiring, pads, vias, and the like for electrically connecting the heater 123 and the control circuit 122.
- control circuit 122 detects the current consumption of the chip under test 310-1 in a state where the test is being performed based on the value of the current flowing through the test circuit 130. Then, the control circuit 122 adjusts the current supplied to the chip under test 310 based on the detected current consumption.
- the detection and adjustment are the same as the detection and adjustment in the configuration described with reference to FIG.
- connection wafer 110 for connecting pads and terminals provided at different positions is provided between the circuit wafer 150 and the wafer 300 to be tested.
- the connection wafer side pad 159 and the terminal 312 can be electrically connected.
- FIG. 13 is a cross-sectional view showing another configuration example of the probe apparatus 200 provided in the chamber 20 of the test system 400.
- the probe apparatus 200 is electrically connected to the wafer under test 300, for example, and passes a signal to and from the wafer under test 300 in response to a control signal from the control apparatus 10. Test wafer 300 is tested.
- the probe apparatus 200 includes a test wafer unit 100, a wafer-side seal portion 224, a wafer tray 226, a wafer stage 228, and a decompression portion 234.
- the test wafer unit 100 includes a connection wafer 110, a wiring substrate 202, a support unit 204, a device-side anisotropic conductive sheet 212, a device-side seal portion 214, a wafer-side anisotropic conductive sheet 218, a membrane 222, and a fixed portion.
- a ring 220 is included.
- FIG. 13 is a diagram showing a configuration example of the probe apparatus 200 when the connection wafer 110 and the circuit wafer 150 are used.
- the configuration of the probe apparatus 200 on the wafer under test 300 side is the same as that described with reference to FIG.
- An apparatus-side anisotropic conductive sheet 212 is disposed on the upper surface of the circuit wafer 150 in the same manner as the connection wafer 110 described with reference to FIGS.
- a wafer-side anisotropic conductive sheet 218 is disposed on the lower surface of the connection wafer 110 in the same manner as the connection wafer 110 described with reference to FIGS.
- the anisotropic conductive sheet 252 is also disposed between the connection wafer 110 and the circuit wafer 150. These configurations are provided in a space between the wiring board 202 and the membrane 222. Since the operation when the wafer under test 300 is tested by the probe apparatus 200 of this example is the same as that of the probe apparatus 200 described with reference to FIG.
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- Environmental & Geological Engineering (AREA)
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- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
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Abstract
Description
Claims (11)
- 被試験ウエハに形成された複数の被試験チップと電気的に接続する試験用ウエハユニットであって、
前記被試験ウエハと対向して配置され、それぞれの前記被試験チップと電気的に接続される接続用ウエハと、
前記接続用ウエハに設けられ、前記被試験ウエハの温度分布を調整する温度分布調整部と
を備える試験用ウエハユニット。 - 前記接続用ウエハは、前記被試験ウエハと対応する形状を有し、
前記温度分布調整部は、それぞれの前記被試験チップと対向する位置に設けられ、それぞれの前記被試験チップの温度を調整する複数の個別温度調整部を有する
請求項1に記載の試験用ウエハユニット。 - それぞれの前記個別温度調整部は、対応する前記被試験チップの電力消費に応じた情報を検出し、検出結果に基づいて前記被試験チップの温度を調整する
請求項2に記載の試験用ウエハユニット。 - それぞれの前記個別温度調整部は、前記被試験チップを加熱するヒータを有する
請求項3に記載の試験用ウエハユニット。 - それぞれの前記個別温度調整部は、前記被試験チップに供給する電流を調整する
請求項3に記載の試験用ウエハユニット。 - 前記接続用ウエハと対向して設けられ、前記接続用ウエハを介して前記被試験ウエハに電気的に接続される回路用ウエハと、
複数の前記被試験チップと対応して前記回路用ウエハに設けられ、前記接続用ウエハを介して、それぞれ対応する前記被試験チップを試験する複数の試験回路と
を更に備える請求項4に記載の試験用ウエハユニット。 - 複数の前記個別温度調整部は、
複数の前記被試験チップのそれぞれに対応して前記回路用ウエハに設けられ、対応する前記被試験チップに供給される電源電流の検出結果に基づいて、対応する前記ヒータを制御する
請求項6に記載の試験用ウエハユニット。 - 前記ヒータは、前記接続用ウエハにおいて、前記回路用ウエハと対向する面の裏面に設けられ、
前記試験回路は、前記回路用ウエハにおいて、前記接続用ウエハと対向する面の裏面に設けられる
請求項6に記載の試験用ウエハユニット。 - 前記接続用ウエハには、前記回路用ウエハと対向する面に、それぞれの前記試験回路と電気的に接続される複数の回路用ウエハ側パッドが形成され、前記回路用ウエハと対向する面の裏面に、それぞれの前記被試験チップと電気的に接続される複数の被試験ウエハ側パッドが形成される
請求項8に記載の試験用ウエハユニット。 - 複数の前記被試験ウエハ側パッドは、複数の前記回路用ウエハ側パッドとは異なる間隔で配置される
請求項9に記載の試験用ウエハユニット。 - 被試験ウエハに形成された複数の被試験チップを試験する試験システムであって、
複数の前記被試験チップと電気的に接続する試験用ウエハユニットと、
前記試験用ウエハユニットを介して、それぞれの前記被試験チップを試験する制御装置と
を備え、
前記試験用ウエハユニットは、
前記被試験ウエハと対向して配置され、それぞれの前記被試験チップと電気的に接続される接続用ウエハと、
前記接続用ウエハに設けられ、前記被試験ウエハの温度分布を調整する温度分布調整部と
を有する試験システム。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010512888A JP4722227B2 (ja) | 2008-05-21 | 2008-05-21 | 試験用ウエハユニットおよび試験システム |
| PCT/JP2008/059389 WO2009141906A1 (ja) | 2008-05-21 | 2008-05-21 | 試験用ウエハユニットおよび試験システム |
| KR1020107023756A KR101221079B1 (ko) | 2008-05-21 | 2008-05-21 | 시험용 웨이퍼 유닛 및 시험 시스템 |
| TW098116783A TWI388022B (zh) | 2008-05-21 | 2009-05-20 | 測試用晶圓單元以及測試系統 |
| US12/947,721 US8289040B2 (en) | 2008-05-21 | 2010-11-16 | Test wafer unit and test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2008/059389 WO2009141906A1 (ja) | 2008-05-21 | 2008-05-21 | 試験用ウエハユニットおよび試験システム |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12/947,721 Continuation US8289040B2 (en) | 2008-05-21 | 2010-11-16 | Test wafer unit and test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009141906A1 true WO2009141906A1 (ja) | 2009-11-26 |
Family
ID=41339855
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2008/059389 Ceased WO2009141906A1 (ja) | 2008-05-21 | 2008-05-21 | 試験用ウエハユニットおよび試験システム |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8289040B2 (ja) |
| JP (1) | JP4722227B2 (ja) |
| KR (1) | KR101221079B1 (ja) |
| TW (1) | TWI388022B (ja) |
| WO (1) | WO2009141906A1 (ja) |
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| JP2017227478A (ja) * | 2016-06-21 | 2017-12-28 | 株式会社日本マイクロニクス | プローブカード、検査装置および検査方法 |
| CN113687206A (zh) * | 2021-10-21 | 2021-11-23 | 常州欣盛半导体技术股份有限公司 | 晶片测试板、晶片测试系统和晶片测试方法 |
| JP2022070228A (ja) * | 2020-10-26 | 2022-05-12 | プロ-2000・カンパニー・リミテッド | ウェーハテスト用プローブカード |
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| US9041422B2 (en) * | 2011-03-31 | 2015-05-26 | Intel Mobile Communications GmbH | Circuit arrangement with a plurality of on-chip monitor circuits and a control circuit and corresponding methods |
| WO2019017504A1 (ko) * | 2017-07-18 | 2019-01-24 | 이상훈 | 웨이퍼 레벨에서 온도 및 알에프 특성 모니터링이 가능한 알에프 파워 소자 |
| CN113432737A (zh) * | 2020-03-19 | 2021-09-24 | 长鑫存储技术有限公司 | 晶圆卡盘温度量测及温度校准的方法和温度量测系统 |
| US11480593B1 (en) * | 2021-07-30 | 2022-10-25 | Rohde & Schwarz Gmbh & Co. Kg | Measurement system and method of determining an energy usage parameter of an electronic device under test |
| US11828795B1 (en) | 2022-10-21 | 2023-11-28 | AEM Holdings Ltd. | Test system with a thermal head comprising a plurality of adapters for independent thermal control of zones |
| US12259427B2 (en) | 2022-10-21 | 2025-03-25 | AEM Singapore Pte, LTD. | Thermal head comprising a plurality of adapters for independent thermal control of zones |
| US11796589B1 (en) | 2022-10-21 | 2023-10-24 | AEM Holdings Ltd. | Thermal head for independent control of zones |
| US12499957B2 (en) | 2022-12-13 | 2025-12-16 | Micron Technology, Inc. | Thermal conduction based batch testing system |
| US11828796B1 (en) | 2023-05-02 | 2023-11-28 | AEM Holdings Ltd. | Integrated heater and temperature measurement |
| TWI871719B (zh) * | 2023-07-31 | 2025-02-01 | 南亞科技股份有限公司 | 晶圓量測方法 |
| US12013432B1 (en) | 2023-08-23 | 2024-06-18 | Aem Singapore Pte. Ltd. | Thermal control wafer with integrated heating-sensing elements |
| US12085609B1 (en) | 2023-08-23 | 2024-09-10 | Aem Singapore Pte. Ltd. | Thermal control wafer with integrated heating-sensing elements |
| US12000885B1 (en) | 2023-12-20 | 2024-06-04 | Aem Singapore Pte. Ltd. | Multiplexed thermal control wafer and coldplate |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI388022B (zh) | 2013-03-01 |
| TW201001584A (en) | 2010-01-01 |
| KR101221079B1 (ko) | 2013-01-11 |
| JP4722227B2 (ja) | 2011-07-13 |
| KR20100126831A (ko) | 2010-12-02 |
| US8289040B2 (en) | 2012-10-16 |
| JPWO2009141906A1 (ja) | 2011-09-29 |
| US20110095777A1 (en) | 2011-04-28 |
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