IPM module-based detection clamp

Abstract

The utility model provides a kind of detection clamp based on IPM module, it is related to the field of semiconductor detection, comprising: lower part, with a recess, clamping portion is set in recess, clamping portion can move in length direction in recess;Upper part, detachably set in the upper of lower part, window is set in upper portion, and window is located in the upper of recess, and window is penetrated through upper portion along height direction;Slip portion, set between upper portion and lower part, slip portion includes first crossbeam and second crossbeam, the length direction of first crossbeam and second crossbeam is same with the width direction of lower part, first crossbeam and second crossbeam can slide in the length direction of lower part respectively, and move in height direction, by recessing in lower part, and using clamping portion to clamp DBC module, so as to be suitable for the frame of different sizes, simultaneously, first crossbeam and second crossbeam can adjust position and height in length direction, so as to facilitate each part of IPM module to be tightly pressed on lower part.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor testing, and in particular to a testing fixture based on an IPM module. Background Technology

[0002] An IPM module is a relatively independent intelligent power module that integrates ICs, IGBTs, drivers, protection, control, and detection circuits into a single package, providing some or all of their functionality. An IPM module contains various wires of different materials and diameters. After chip surface mounting and soldering, the chip shear force needs to be measured. After aluminum and gold wire bonding, the bonding strength of the gold and aluminum wires on the chip needs to be measured.

[0003] like Figure 1 The diagram shows a typical IPM module, including a DBC module (01), a second chip (02) on the DBC module (01), a first frame (03) and a first chip (04) on the first frame (03) on one side of the DBC module (01), and a second frame (05) at the same height as the first frame (03) on the other side of the DBC module (01). The second frame (05) has solder joints (06), a lead connects the first chip (04) and the second chip (02), and another lead connects the second chip (02) and the solder joints (06).

[0004] Because the various DBC modules (01) and the frame have different dimensions and there is a height difference between them, multiple tooling is required to test the shear force of the IPM module and the welding strength of the lead wires, which is very inconvenient. Utility Model Content

[0005] This invention provides a testing fixture based on an IPM module. The purpose is to provide a testing fixture specifically for IPM modules, reducing the need for frequent fixture changes during IPM module testing, which leads to complex processes.

[0006] To achieve the above objectives, embodiments of this utility model provide a detection fixture based on an IPM module, comprising:

[0007] The lower part has a groove on its upper surface, the groove extending along the width direction of the lower part, and a clamping part is provided in the groove, the clamping part being movable along the length direction within the groove;

[0008] The upper part is detachably disposed above the lower part, and a window extending through the upper part along the height direction is provided on the upper part, the window being located above the groove;

[0009] A sliding part is disposed between the upper part and the lower part. The sliding part includes a first crossbeam and a second crossbeam. The length direction of the first crossbeam and the second crossbeam is the same as the width direction of the lower part. The first crossbeam and the second crossbeam can slide in the length direction of the lower part and move in the height direction, respectively.

[0010] Preferably, a guide groove is also provided in the upper part along the lower length direction, and the two guide grooves are respectively located in the width direction of the window;

[0011] The first crossbeam is provided with first sliding bolts at both ends, and the two first sliding bolts pass through the two guide grooves and are connected to the two ends of the first crossbeam.

[0012] The two ends of the second crossbeam are respectively provided with second sliding bolts, and the two second sliding bolts pass through the two guide grooves and are connected to the two ends of the second crossbeam;

[0013] The nuts of the first and second sliding bolts are larger than the width of the guide groove;

[0014] An adjusting ring is screwed onto the first and second sliding bolts, and the adjusting ring is located above or below the upper part.

[0015] Preferably, the first crossbeam and the second crossbeam have the same structure, including a middle section and two ends, with the two ends located at both ends of the middle section, and the two ends are used to screw on the first sliding bolt or the second sliding bolt;

[0016] The end portion is rectangular, and the middle portion has an inclined slope;

[0017] The inclined surfaces of the first crossbeam and the second crossbeam are arranged opposite each other, and the bottom gap of the space formed between the middle part of the first crossbeam and the middle part of the second crossbeam is smaller than the top gap.

[0018] Preferably, a fastening bolt is also provided on the upper part, the fastening bolt passing through the upper part and screwed to the lower part.

[0019] Preferably, the upper surface of the lower part is further provided with positioning pins, which are located at the four corners of the lower part, and the upper part is provided with positioning holes for the positioning pins to be inserted.

[0020] Preferably, the lower part is further provided with a push screw along the length direction, the push screw being screwed to the lower part and rotatably connected to the clamping part.

[0021] Preferably, there are two push screws, which are spaced apart along the width direction of the lower part.

[0022] The above-mentioned solution of this utility model has the following beneficial effects:

[0023] In this application, the DBC module can be clamped by opening a groove in the lower part and utilizing the movable feature of the clamping part, thereby adapting to frames of different sizes. At the same time, the first crossbeam and the second crossbeam can be adjusted in position in the length direction and in height in the height direction, thereby facilitating the clamping of the DBC module, the first frame and the second frame against the lower part.

[0024] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal spatial location of the IPM module;

[0026] Figure 2 This is a schematic diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the upper part;

[0028] Figure 4 This is a schematic diagram of the lower part;

[0029] Figure 5 This is a schematic diagram of the first crossbeam;

[0030] Figure 6 This is a schematic diagram of the installation of the adjusting ring, in which:

[0031] (a) is a schematic diagram of the device used to press against the first or second frame during testing;

[0032] (b) is a schematic diagram showing the device being pressed against the DBC module during testing;

[0033] (c) is a schematic diagram of the first crossbeam after it is adjusted to press against the DBC module during testing.

[0034] [Explanation of Labels in the Attached Image]

[0035] 100. Lower part; 110. Groove; 120. Clamping part; 130. Positioning pin; 140. Push screw;

[0036] 200, Upper part; 210, Window; 220, Guide groove; 230, Fastening bolt;

[0037] 300, Sliding part; 310, First crossbeam; 320, Second crossbeam; 311, Middle part; 312, End part; 330, First sliding bolt; 340, Second sliding bolt; 350, Adjusting ring.

[0038] 01. DBC module; 02. Second chip; 03. First frame; 04. First chip; 05. Second frame; 06. Soldering point. Detailed Implementation

[0039] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0040] like Figures 2-6 As shown, an embodiment of this utility model provides a detection fixture based on an IPM module, including a lower part 100 and an upper part 200. The upper surface of the lower part 100 has a groove 110, the length of which extends along the width of the lower part 100. A movable clamping part 120 is disposed within the groove 110, and the clamping part 120 can move along the length direction within the groove 110. The aforementioned upper part 200 is detachably disposed above the lower part 100. A window 210 is formed on the upper part 200, extending through the upper part 200 along the height direction. The window 210 is located above the groove 110 in the lower part 100, and the opening range of the window 210 is larger than the range of the groove 110. The detection fixture based on the IPM module also includes a sliding part 300, which is disposed between the upper part 200 and the lower part 100. The sliding part 300 includes a first crossbeam 310 and a second crossbeam 320. The length direction of the first crossbeam 310 and the second crossbeam 320 is the same as the width direction of the lower part 100. The first crossbeam 310 can slide in the length direction of the lower part 100 and can also move up and down in the height direction. The second crossbeam 320 can slide in the length direction of the lower part 100 and can also move up and down in the height direction.

[0041] When testing the IPM module, first separate the upper part 200 and the lower part 100, place the entire IPM module into the lower part 100, and keep the DBC module 01 in the groove 110. Slide the clamping part 120 along the length of the lower part 100 so that the clamping part 120 tightly abuts the DBC module 01 in the groove 110. At the same time, place the first frame 03 and the first chip 04 on one side of the lower part 100 located in the groove 110, place the second frame 05 on the other side of the lower part 100 located in the groove 110, install the upper part 200 on the lower part 100, and pre-tighten the upper part 200 and the lower part 100 in the height direction.

[0042] When performing tension or thrust testing on the leads between the first chip 04 and the second chip 02, the first crossbeam 310 is pressed against the side of the first frame 03 away from the second chip 02, and the second crossbeam 320 is pressed against the side of the DBC module 01 away from the first chip 04. At this time, the second chip 02 and the first chip 04 are located between the first crossbeam 310 and the second crossbeam 320. Under this pressing condition, tension or thrust testing can be performed on the leads between the first chip 04 and the second chip 02.

[0043] Furthermore, when performing thrust detection on the lead wire between the first chip 04 and the second chip 02, the first crossbeam 310 can be pressed against the side of the first frame 03 away from the second chip 02, and the second crossbeam 320 can be pressed against the side of the first frame 03 close to the second chip 02. At this time, the first chip 04 is located between the first crossbeam 310 and the second crossbeam 320, and the second chip 02 is located on the side of the second crossbeam 320 away from the first crossbeam 310.

[0044] When inspecting the lead between the second chip 02 and the solder joint 06, tensile or push force tests can be performed. The first crossbeam 310 is pressed against the side of the DBC module 01 away from the solder joint 06, and the second crossbeam 320 is pressed against the side of the second frame 05 away from the second chip 02. At this time, the second chip 02 and the solder joint 06 are located between the first crossbeam 310 and the second crossbeam 320.

[0045] Because of the height difference between the first chip 04 and the second chip 02, when using conventional tooling for testing, it is necessary to use one type of tooling when measuring the first chip 04 and another type of tooling when measuring the second chip 02. The frequent tooling changes lead to complex processes.

[0046] In this application, by setting a first crossbeam 310 and a second crossbeam 320 that can move in the length and height directions, and cooperating with the groove 110 of the lower part 100, the bonding strength of the IPM module can be tested in one tooling without changing the tooling in the middle, thus simplifying the process and improving the testing efficiency.

[0047] Furthermore, guide grooves 220 are provided on the upper mold. There are two guide grooves 220. The length direction of the two guide grooves 220 is the same as the length direction of the lower part 100. The two guide grooves 220 are spaced apart along the width direction of the window 210 and are located on both sides of the window 210 respectively.

[0048] First sliding bolts 330 are respectively provided at both ends of the first crossbeam 310. One first sliding bolt 330 passes through a guide groove 220 and is screwed to one end of the first crossbeam 310. Another second sliding bolt 340 passes through another guide groove 220 and is screwed to the other end of the first crossbeam 310, so that the length direction of the first crossbeam 310 is perpendicular to the projection of the length direction of the guide groove 220 on the lower part 100.

[0049] Similarly, second sliding bolts 340 are respectively provided at both ends of the second crossbeam 320. One second sliding bolt 340 passes through a guide groove 220 and is screwed to one end of the second crossbeam 320, while the other second sliding bolt 340 passes through another guide groove 220 and is screwed to the other end of the second crossbeam 320. The first crossbeam 310 is parallel to the second crossbeam 320. The nuts of the first sliding bolt 330 and the second sliding bolt 340 are larger than the width of the guide groove 220, thereby preventing the first sliding bolt 330 or the second sliding bolt 340 from passing through the guide groove 220.

[0050] Adjusting rings 350 are also provided on the first sliding bolt 330 and the second sliding bolt 340. The adjusting rings 350 are screwed to the first sliding bolt 330 and the second sliding bolt 340, and the size of the adjusting rings 350 is larger than the width of the guide groove 220. The adjusting rings 350 are set above or below the upper part 200 depending on the detection position.

[0051] When inspecting the first chip 04 on the first frame 03 or the solder joint 06 on the second frame 05, the adjustment ring 350 is located above the upper part 200. At this time, the adjustment ring 350 can cooperate with the first crossbeam 310 or the second crossbeam 320 to determine the position of the first crossbeam 310 and the second crossbeam 320 in the length direction of the lower part 100.

[0052] When testing the second chip 02, the adjusting ring 350 is located below the upper part 200. Since the position of the second chip 02 is lower than that of the first chip 04, the first crossbeam 310 and the second crossbeam 320 need to be adjusted downwards. By rotating the fastening bolt 230, the interval between the adjusting ring 350 and the first crossbeam 310 or the second crossbeam 320 is adjusted to ensure that the first crossbeam 310 and the second crossbeam 320 move downwards and thus press against the DBC module 01.

[0053] In this embodiment, a fastening bolt 230 is provided on the upper part 200, and the fastening bolt 230 passes through the upper part 200 and is screwed to the lower part 100. Pre-tightening and tightening are achieved by tightening the fastening bolt 230. In the pre-tightened state, the upper part 200 and the lower part 100 can move relative to each other, but this movement is limited by the length of the fastening bolt 230. In the tightened state, the upper part 200 and the lower part 100 are restricted from relative movement by the fastening bolt 230.

[0054] It should also be noted that, in the tightened state, there may be a gap between the upper part 200 and the lower part 100, and it is not necessary to ensure that the surfaces fit together.

[0055] Preferably, a positioning pin 130 is also provided on the upper surface of the lower part 100. The positioning pin 130 is located at the four corners of the lower part 100, and the upper part 200 is provided with positioning holes for the positioning pin 130 to be inserted.

[0056] In this application, the first crossbeam 310 and the second crossbeam 320 have the same structure, both including a middle portion 311 and end portions 312. Each end portion 312 is provided at both ends of the middle portion 311, and is used to screw on a first sliding bolt or a second sliding bolt. The end portions 312 are rectangular to ensure sufficient upper surface area for connection when the first or second sliding bolt is screwed on. The middle portion 311 has an inclined surface. In this embodiment, the middle portion 311 is a right-angled trapezoid in its length and height cross-section. The inclined surfaces of the first crossbeam 310 and the second crossbeam 320 are arranged opposite each other, and the space formed between the middle portions 311 of the first crossbeam 310 and the middle portions 311 of the second crossbeam 320 has a smaller bottom spacing than its top spacing, i.e., this space is an inverted trapezoid. The purpose of providing the inclined surface in the middle portion 311 is to facilitate observation of the pusher's position under a microscope.

[0057] Furthermore, a push screw 140 is provided along the length direction of the lower part 100. The push screw 140 is screwed to the lower part 100 and rotatably connected to the clamping part 120. When the push screw 140 is rotated, the push screw 140 can push the clamping part 120 to move along the length direction of the lower part 100, thereby clamping or releasing the DBC module 01.

[0058] Preferably, there are two push screws 140, which are spaced apart along the width direction of the lower part 100.

[0059] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A detection fixture based on an IPM module, characterized in that, include: The lower part (100) has a groove (110) on its upper surface. The groove (110) extends along the width direction of the lower part (100). A clamping part (120) is provided in the groove (110). The clamping part (120) can move along the length direction in the groove (110). The upper part (200) is detachably disposed above the lower part (100), and a window (210) is provided on the upper part (200) extending through the upper part (200) along the height direction. The window (210) is located above the groove (110). A sliding part (300) is disposed between the upper part (200) and the lower part (100). The sliding part (300) includes a first crossbeam (310) and a second crossbeam (320). The length direction of the first crossbeam (310) and the second crossbeam (320) is the same as the width direction of the lower part (100). The first crossbeam (310) and the second crossbeam (320) can slide in the length direction of the lower part (100) and move in the height direction, respectively.

2. The detection fixture based on the IPM module according to claim 1, characterized in that: The upper part (200) is also provided with a guide groove (220) that is opened along the length direction of the lower part (100), and the two guide grooves (220) are respectively located in the width direction of the window (210); The first crossbeam (310) is provided with first sliding bolts (330) at both ends, and the two first sliding bolts (330) pass through the two guide grooves (220) and are connected to the two ends of the first crossbeam (310); The two ends of the second crossbeam (320) are respectively provided with second sliding bolts (340), and the two second sliding bolts (340) pass through the two guide grooves (220) and are connected to the two ends of the second crossbeam (320); The nuts of the first sliding bolt (330) and the second sliding bolt (340) are larger than the width of the guide groove (220); An adjusting ring (350) is screwed onto the first sliding bolt (330) and the second sliding bolt (340), the adjusting ring (350) being located above or below the upper part (200).

3. The detection fixture based on the IPM module according to claim 2, characterized in that: The first crossbeam (310) and the second crossbeam (320) have the same structure, including a middle part (311) and two ends (312). The two ends (312) are located at both ends of the middle part (311) and are used to screw the first sliding bolt (330) or the second sliding bolt (340). The end portion (312) is rectangular, and the middle portion (311) has an inclined slope; The inclined surfaces of the first crossbeam (310) and the second crossbeam (320) are arranged opposite each other, and the space formed between the middle part (311) of the first crossbeam (310) and the middle part (311) of the second crossbeam (320) has a smaller bottom spacing than the top spacing.

4. The detection fixture based on the IPM module according to claim 1, characterized in that: The upper part (200) is also provided with a fastening bolt (230), which passes through the upper part (200) and is screwed to the lower part (100).

5. The detection fixture based on an IPM module according to claim 1 or 4, characterized in that: The upper surface of the lower part (100) is also provided with a positioning pin (130), the positioning pin (130) is located at the four corners of the lower part (100), and the upper part (200) is provided with a positioning hole for the positioning pin (130) to be inserted.

6. The detection fixture based on the IPM module according to claim 1, characterized in that: The lower part (100) is also provided with a push screw (140) along its length direction. The push screw (140) is screwed to the lower part (100) and rotatably connected to the clamping part (120).

7. The detection fixture based on the IPM module according to claim 6, characterized in that: There are two push screws (140), which are spaced apart along the width direction of the lower part (100).

Images