CN210452457U - Power device standing degree measuring clamp - Google Patents
Power device standing degree measuring clamp Download PDFInfo
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- CN210452457U CN210452457U CN201921297533.5U CN201921297533U CN210452457U CN 210452457 U CN210452457 U CN 210452457U CN 201921297533 U CN201921297533 U CN 201921297533U CN 210452457 U CN210452457 U CN 210452457U
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- positioning groove
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- power device
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Abstract
The utility model provides a power device degree of standing measurement anchor clamps, include: the device comprises a concave base, at least one positioning groove is embedded in one inner side of the concave base, the positioning groove is matched with a device to be tested in shape and used for accommodating the device to be tested, and the lower part of the positioning groove is hollowed out and used for displaying pins of the device to be tested; and a positioning mechanism matched with the positioning groove penetrates through the other side of the concave base, and the positioning mechanism utilizes elastic deformation to adjust the telescopic stroke of the positioning mechanism so as to control whether to press the device to be tested. When putting into positioning groove with the device to be measured, make positioning mechanism's elastic deformation by compressing to the extension state of reconversion, press from both sides the convenient follow-up direct measurement of its pin height of standing of tight device to be measured, this device simple structure, easy and simple to handle and low cost can prevent that the sample from taking place the slope when measuring and leading to measuring inaccurate, simultaneously, can be according to the guide pillar of device to be measured thickness random adjustment location, improved its commonality.
Description
Technical Field
The utility model relates to a semiconductor device detects technical field, especially relates to a power device degree of standing measurement anchor clamps.
Background
In the prior art, when the stand degree (i.e. the stand height of the pins) of the semiconductor power device is measured by using a desktop magnifier, the semiconductor power device needs to be perpendicular or parallel to the objective table, otherwise, the detection result is influenced. However, when the standing degree of the conventional semiconductor power device is measured, the device needs to be attached to a rectangular jig by using a double-sided adhesive tape, as shown in fig. 1, the double-sided adhesive tape has a certain thickness and cannot ensure that the device is completely vertical or parallel to the object stage, so that the measured standing degree (data) is inaccurate.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings of the prior art, an object of the present invention is to provide a power device standing degree measuring clamp for solving the problem of inaccurate measured standing degree caused by the inclination of the semiconductor power device in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a power device standing degree measuring jig, including:
a concave base seat is arranged on the base seat,
at least one positioning groove is embedded in one inner side of the concave base, the positioning groove is matched with a device to be tested in shape and used for accommodating the device to be tested, and the lower part of the positioning groove is hollowed out and used for displaying pins of the device to be tested;
and a positioning mechanism matched with the positioning groove penetrates through the other side of the concave base, and the positioning mechanism utilizes elastic deformation to adjust the telescopic stroke of the positioning mechanism so as to control whether to press the device to be tested.
In an embodiment of the present invention, when the elastic deformation of the positioning mechanism is compressed, the stroke of the positioning mechanism is contracted to place the device to be tested; and when the elastic deformation of the positioning mechanism is in extension, the stroke of the positioning mechanism is extended to press the device to be tested.
In an embodiment of the present invention, the positioning mechanism includes a positioning block, a pull rod, a guide pillar and a spring, the guide pillar penetrates through one side of the concave base, the pull rod is connected to the top of the guide pillar, and the positioning block is fixed at the bottom end of the guide pillar; the spring penetrates through the guide post and is controlled to deform by the pull rod.
In an embodiment of the present invention, the surface of the pull rod is uniformly embedded with anti-slip grooves.
In an embodiment of the present invention, the positioning block is a metal block corresponding to the package body on the surface of the device under test.
In an embodiment of the present invention, the end of the pull rod is connected to a driving mechanism for controlling the guide pillar to move up and down.
In an embodiment of the utility model, positioning groove is including holding the first positioning groove of device under test's pin with hold the packaging structure of device under test and with positioning mechanism assorted second positioning groove, first positioning groove sets up with the second positioning groove is adjacent.
In an embodiment of the present invention, the first positioning groove is provided with a fixing block capable of accommodating and preventing the device under test from inclining.
In an embodiment of the present invention, the lower portions of the first groove and the second groove are hollowed out.
In an embodiment of the present invention, the stand height of the pin of the dut is measured from the lower portion of the positioning groove by using the desktop magnifier or the measuring projector.
In an embodiment of the present invention, the device under test is a power device, and the power device includes any one of a power diode thyristor, an insulated gate bipolar transistor, a power transistor, a turn-off thyristor, or a power field effect transistor.
As described above, the utility model discloses a power device degree of standing measurement anchor clamps has following beneficial effect:
through placing the device to be tested in the positioning groove, it is flexible to utilize its deformation of positioning mechanism back and forth control from top to bottom, thereby reach the effect whether to compress tightly the device to be tested, when putting into positioning groove with the device to be tested, make positioning mechanism's elastic deformation by compressing to the extension state of reconversion, press from both sides the convenient follow-up directly measuring its pin height of standing of tight device to be tested, this device simple structure, easy and simple to handle and low cost, can prevent that the sample from taking place the slope when measuring and leading to measuring inaccurate, and simultaneously, adjust the guide pillar of location at will according to device to be tested thickness, the commonality is improved.
Drawings
Fig. 1 is a schematic view illustrating a conventional jig for testing the standing height of a pin according to the present invention;
fig. 2 shows a front view of a stand measuring fixture for a power device according to the present invention;
fig. 3 shows a side view of a stand measuring fixture for a power device according to the present invention;
fig. 4 shows that the utility model provides a power device standing degree measuring clamp measures the front view of the device under test.
Element number description:
1 concave base
2 positioning groove
3 locating block
4 spring
5 guide post
6 draw bar
7 device under test
21 first positioning groove
22 second positioning groove
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
In the following description, reference is made to the accompanying drawings that describe several embodiments of the application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "above," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.
Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first steering oscillation may be referred to as a second steering oscillation, and similarly, the second steering oscillation may be referred to as a first steering oscillation, without departing from the scope of the various described embodiments.
Please refer to fig. 2 to fig. 4, which are a front view, a side view and a front view during measurement of a fixture for measuring standing degree of a power device provided by the present invention, specifically comprising:
the concave-shaped base 1 is provided with a concave-shaped base,
at least one positioning groove 2 is embedded in one inner side of the concave base 1, the positioning groove 2 is matched with a device to be tested 7 in shape and used for accommodating the device to be tested 7, and the lower part of the positioning groove 2 is hollowed out and used for displaying (exposing) pins of the device to be tested 7; measuring the standing height of the pin of the device to be measured from the lower part of the positioning groove by using a desktop magnifier or a measuring projector;
and a positioning mechanism matched with the positioning groove 2 penetrates through the other side of the concave base 1, and the positioning mechanism adjusts the telescopic stroke of the positioning mechanism by utilizing elastic deformation so as to control whether to press the device to be tested 7 or not.
When the elastic deformation of the positioning mechanism is compressed, the stroke of the positioning mechanism is contracted, so that the device to be tested 7 can be placed; when the elastic deformation of the positioning mechanism is in extension, the stroke of the positioning mechanism is extended to press the device to be tested 7; the device to be tested 7 is a semiconductor power device, and the semiconductor power device comprises any one of a power diode, a thyristor, an insulated gate bipolar transistor, a power transistor, a turn-off thyristor or a power field effect transistor.
In one embodiment, the positioning mechanism includes a positioning block 3, a pull rod 6, a guide post 5 and a spring 4, the guide post 5 penetrates through one side of the concave base 1, the pull rod 6 is connected to the top of the guide post 5, and the positioning block 3 is fixed at the bottom end of the guide post 5; the spring 4 penetrates through the guide post 5 and is controlled to deform by the pull rod.
Anti-skid grooves are uniformly embedded in the surface of the pull rod 6, so that the friction force of holding is increased when the operation is considered, and the device to be tested is prevented from being damaged by the slipping operation.
The positioning block 3 is a metal block which is matched with a packaging body on the surface of the device to be detected 7, the metal block can be made of copper, iron, aluminum and the like, the shape of the metal block is in contact with the upper surface of the packaging body (injection molding shell) of the device to be detected, the contact area is large as much as possible, the metal block is easy to compress on one hand, and the metal block is more stable to clamp during measurement during operation on the other hand. In addition, the spring 4 and the self gravity of the guide post 5 are used for clamping, so that the device to be tested can be prevented from loosening.
In this embodiment, the device is used to pull the pull rod 6 upwards, and the spring 4 is in a compressed state at the moment, and the device to be measured is directly placed in the positioning groove 2, and then the pull rod is put down, so that the device to be measured is in a compressed state due to the elasticity of the spring and the gravity of the guide pillar, and subsequent measurement is facilitated.
In an embodiment, the positioning groove 2 includes a first positioning groove 21 for accommodating a pin of the device under test and a second positioning groove 22 for accommodating a package structure of the device under test and matching with the positioning mechanism, and the first positioning groove 21 and the second positioning groove 22 are disposed adjacently.
Since the shape of the device to be tested 7 is greatly related to the positioning groove 2, the positioning groove 2 needs to accommodate the device to be tested 7 on one hand, and at the same time, it is ensured that the pins of the device to be tested 7 are exposed, which is convenient for subsequent measurement, in this embodiment, since the pins of the device to be tested 7 come out of the package structure not in a straight line but in typical chip pins, the positioning groove is divided into two grooves, one of which accommodates the package structure (heat sink) and the other accommodates the pins.
In an embodiment, the first positioning groove 21 is configured to accommodate a fixing block for preventing the dut from tilting, the fixing block is a metal rod with a relatively high density, such as a copper rod, and the pins are prevented from tilting due to the pressure applied by the copper rod.
In an embodiment, the lower portions of the first groove 21 and the second groove 21 are both hollowed out, wherein, under a desktop magnifier or a measurement projector, the lower portion of the second groove 22 is hollowed out for displaying heat sink projection, and the lower portion of the first groove 21 is hollowed out for displaying pin projection.
In one embodiment, the end of the pull rod 6 is connected with a driving mechanism for controlling the guide post to move up and down, and the guide post is automatically controlled to move up and down by other driving mechanisms, so as to achieve the purpose of automatically clamping the device to be tested.
To sum up, the utility model discloses an in placing the positioning groove with the device to be tested, utilize its deformation of positioning mechanism back and forth control flexible from top to bottom, thereby reach the effect whether to compress tightly the device to be tested, when putting into positioning groove with the device to be tested, make positioning mechanism's elastic deformation by compressing to the extension state of reconversion, press from both sides the convenient follow-up direct measurement of device to be tested height of standing of its pin, this device simple structure, easy and simple to handle and low cost can prevent that the sample from taking place the slope when measuring and leading to measuring inaccurate, and simultaneously, adjust the guide pillar of location at will according to the device to be tested thickness, its commonality has been improved. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. It will be apparent to those skilled in the art that modifications and variations can be made to the above-described embodiments without departing from the spirit and scope of the invention, and it is intended that all equivalent modifications and variations be covered by the appended claims without departing from the spirit and scope of the invention.
Claims (10)
1. A power device standability measurement fixture, comprising:
a concave base seat is arranged on the base seat,
at least one positioning groove is embedded in one inner side of the concave base, the positioning groove is matched with a device to be tested in shape and used for accommodating the device to be tested, and the lower part of the positioning groove is hollowed out and used for displaying pins of the device to be tested;
and a positioning mechanism matched with the positioning groove penetrates through the other side of the concave base, and the positioning mechanism utilizes elastic deformation to adjust the telescopic stroke of the positioning mechanism so as to control whether to press the device to be tested.
2. The fixture for measuring standing degree of power device according to claim 1, wherein the positioning mechanism comprises a positioning block, a pull rod, a guide post and a spring, the guide post penetrates through one side of the concave base, the pull rod is connected to the top of the guide post, and the positioning block is fixed to the bottom end of the guide post; the spring penetrates through the guide post and is controlled to deform by the pull rod.
3. The power device standability measurement fixture of claim 2, wherein the tie bar surface is uniformly embedded with non-slip grooves.
4. The fixture of claim 2, wherein the positioning block is a metal block conforming to a package on the surface of the dut.
5. The power device standability measurement jig of claim 1, wherein the pin standing height of the device under test is measured from the lower portion of the positioning groove using a desk magnifier or a measurement projector.
6. The power device standability measurement fixture of claim 1, wherein the positioning grooves comprise a first positioning groove for accommodating the pin of the device under test and a second positioning groove for accommodating the package structure of the device under test and matching with the positioning mechanism, and the first positioning groove and the second positioning groove are disposed adjacent to each other.
7. The fixture for measuring the standing degree of a power device as claimed in claim 6, wherein the first positioning groove is provided with a fixing block capable of accommodating the device under test to prevent the device under test from tilting.
8. The fixture for measuring the standing degree of the power device according to claim 6 or 7, wherein the lower portions of the first positioning groove and the second positioning groove are hollowed out.
9. The power device standability measurement fixture of claim 2, wherein a drive mechanism for controlling the guide post to move up and down is connected to the end of the pull rod.
10. The fixture for measuring the standability of a power device according to claim 1, wherein the device under test is a power device, and the power device comprises any one of a power diode, a thyristor, an insulated gate bipolar transistor, a power transistor, a turn-off thyristor, or a power field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921297533.5U CN210452457U (en) | 2019-08-12 | 2019-08-12 | Power device standing degree measuring clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921297533.5U CN210452457U (en) | 2019-08-12 | 2019-08-12 | Power device standing degree measuring clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210452457U true CN210452457U (en) | 2020-05-05 |
Family
ID=70450796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921297533.5U Active CN210452457U (en) | 2019-08-12 | 2019-08-12 | Power device standing degree measuring clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210452457U (en) |
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2019
- 2019-08-12 CN CN201921297533.5U patent/CN210452457U/en active Active
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