An ft test fixture

Abstract

This utility model discloses an FT test fixture, belonging to the field of test fixture technology. It includes a base with a cover plate hinged to the top. The base has a first cavity containing a probe fixedly connected to it. It also includes a limiting frame and a pressure plate. The limiting frame has opening slots on both sides, and the first cavity has vertical slots corresponding to the opening slots on both sides. The cover plate has a second cavity at its bottom, with a sliding rod slidably connected through it. A limiting block is fixedly connected to the bottom of the sliding rod. The pressure plate has a connecting groove. This FT test fixture features opening slots on both sides of the limiting frame and vertical slots on the corresponding positions of the base, allowing direct removal of the limiting frame or internal chip from both sides. The operation is simple and quick. With the fitting of the pressure plate and the middle of the limiting frame, matching limiting frames and pressure plates can be quickly replaced according to different chip shapes, meeting the testing needs of various chip types and improving the fixture's versatility and testing efficiency.

Description

Technical Field

[0001] This utility model specifically relates to an FT test fixture, belonging to the field of test fixture technology. Background Technology

[0002] In the field of integrated circuits (ICs), Final Test (FT) is a crucial step in ensuring the functionality and performance of chips. It connects the chip to a testing machine using a fixture to test the chip's electrical parameters. Existing FT test fixtures typically include core components such as a base, cover plate, and probes. The probes are installed inside the base to contact the chip pins, and the cover plate uses a clamping mechanism to fix the chip onto the probes for stable testing.

[0003] Existing limit frames and pressure plates are usually fixed with screws, which makes the replacement process cumbersome and difficult to quickly adapt to chips of different sizes and shapes, resulting in low testing efficiency. Furthermore, the steps of replacing the limit frame, placing the chip, and clamping it require multiple adjustments or the use of tools, which is time-consuming and requires high operator skills, making it unsuitable for the rapid testing needs of large-scale production. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing an FT testing fixture to achieve rapid replacement. The fixture includes a base with a cover plate hinged to its top. A first cavity is provided inside the base, and a probe is fixedly connected within the first cavity. It also includes a limiting frame and a pressure plate. Opening slots are provided on both sides of the limiting frame. Vertical slots corresponding to the positions of the opening slots are provided on both sides of the first cavity. A second cavity is provided at the bottom of the cover plate, and a sliding rod is slidably connected through the second cavity. A limiting block is fixedly connected to the bottom of the sliding rod. A connecting groove is provided on the pressure plate, with a connecting groove extending through the top of the connecting groove and a positioning groove within the connecting groove.

[0005] Furthermore, a threaded rod is threadedly connected to the top of the cover plate, a pressure plate is fixedly connected to the top of the slide rod, a slide groove is threaded through the cover plate, a connecting plate is slidably connected in the slide groove, a slot is provided on the base, and one end of the connecting plate slides in the slot.

[0006] Furthermore, the bottom of the vertical groove is lower than the bottom of the limiting frame, the length and width of the second cavity are the same as the length and width of the first cavity, and the length of the slide rod is greater than the thickness of the cover plate.

[0007] Furthermore, the positioning groove and the slot are provided in two sets and arranged in a cycle. The angle between the positioning groove and the adjacent slot is 90 degrees, and the height of the limiting block is the same as the thickness of the slot.

[0008] Furthermore, the threaded rod is attached to the top of the pressure plate, the bottom of the pressure plate is attached to the top of the connecting plate, and the threaded rod is located on one side of the slide rod.

[0009] Furthermore, the slot is L-shaped, and the connecting plate is Z-shaped.

[0010] Beneficial effects:

[0011] I. The limiting frame of this utility model has opening slots on both sides, and the base has a vertical slot at the corresponding position. The limiting frame or internal chip can be directly removed from both sides. The operation is simple and quick. With the matching of the pressure plate and the middle of the limiting frame, the matching limiting frame and pressure plate can be quickly replaced according to different chip shapes to meet the testing needs of multiple types of chips and improve the versatility and testing efficiency of the fixture.

[0012] 2. The pressure plate of this utility model is connected to the cover plate by a sliding rod. The bottom of the sliding rod is provided with a limiting block, and the top of the pressure plate is provided with a slot and a positioning groove. After the limiting block is inserted into the slot, it can be rotated 90 degrees to embed into the positioning groove, so as to achieve a stable connection and ensure reliable cooperation between the pressure plate and the limiting frame.

[0013] Third, this utility model uses a rotating threaded rod to fix the chip and the limiting frame with a pressure plate, and at the same time, a pressure plate can press the connecting plate to make the base and the cover plate fixedly connected, avoiding test errors caused by poor contact between the probe and the chip, and further ensuring the synchronization and stability of the pressing process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first state structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the second state structure of this utility model;

[0016] Figure 3 This is an exploded view of the structure of this utility model;

[0017] Figure 4 This is a partial exploded view of the structure of this utility model;

[0018] Figure 5 This is a partial structural cross-sectional view of the present invention.

[0019] In the diagram: 1. Base; 101. First cavity; 102. Probe; 2. Cover plate; 301. Limiting frame; 302. Opening groove; 303. Vertical groove; 305. Slide rod; 306. Limiting block; 307. Pressure plate; 308. Connecting groove; 309. Slot; 310. Positioning groove; 401. Threaded rod; 402. Pressure plate; 403. Slide groove; 404. Connecting plate; 405. Slot. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 As shown, an FT test fixture includes a base 1, a cover plate 2 hinged to the top of the base 1, a first cavity 101 inside the base 1, a probe 102 fixedly connected inside the first cavity 101, a limiting frame 301 and a pressure plate 307, an opening slot 302 on each side of the limiting frame 301, vertical slots 303 on each side of the first cavity 101 corresponding to the positions of the opening slots 302, a second cavity at the bottom of the cover plate 2, a sliding rod 305 slidably connected through the second cavity, a limiting block 306 fixedly connected to the bottom of the sliding rod 305, a connecting groove 308 on the pressure plate 307, a connecting groove 308 penetrating through the top of the connecting groove 308, and a positioning groove 310 inside the connecting groove 308.

[0022] As a technical optimization of this utility model, the top of the cover plate 2 is threadedly connected to a threaded rod 401, the top of the slide rod 305 is fixedly connected to a pressure plate 402, the cover plate 2 is threaded through a slide groove 403, a connecting plate 404 is slidably connected in the slide groove 403, the base 1 is provided with a slot 405, and one end of the connecting plate 404 slides in the slot 405.

[0023] As a technical optimization of this utility model, the bottom of the vertical groove 303 is lower than the bottom of the limiting frame 301. The length and width of the second cavity are the same as the length and width of the first cavity 101. The length of the slide bar 305 is greater than the thickness of the cover plate 2. The limiting frame 301 can be taken out from both sides, and the chip placed in the limiting frame 301 can also be taken out from both sides, which is convenient for replacement according to the test. The shape of the pressure plate 307 is adapted to the middle part of the limiting frame 301.

[0024] As a technical optimization of this utility model, the positioning groove 310 and the slot 309 are respectively provided in two sets and arranged in a cycle. The angle between the positioning groove 310 and the adjacent slot 309 is ninety degrees. The height of the limiting block 306 is the same as the thickness of the slot 309. The positioning groove 310 does not penetrate the top of the connecting groove 308. After the limiting block 306 is inserted into the slot 309, it rotates ninety degrees so that the limiting block 306 is inserted into the positioning groove 310, so that the slide rod 305 is connected to the pressure plate 307.

[0025] As a technical optimization of this utility model, the threaded rod 401 is attached to the top of the pressure plate 307, the bottom of the pressure plate 402 is attached to the top of the connecting plate 404, the threaded rod 401 is located on one side of the slide rod 305, and rotating the threaded rod 401 causes the pressure plate 307 to press and fix the limiting frame 301 and the chip placed in the limiting frame 301 in the probe 102.

[0026] As a technical optimization of this utility model, the card slot 405 is L-shaped and the connecting plate 404 is Z-shaped. One end of the connecting plate 404 is pushed into the depth of the card slot 405. While the pressure plate 307 presses the chip, the pressure plate 402 presses the connecting plate 404, ensuring the stability of the base 1 and the cover plate 2 during testing.

[0027] Working principle: Select the matching limiting frame 301 and pressure plate 307 according to the shape of the chip. Place the limiting frame 301 in the probe 102 on the first cavity 101. Then push the slide bar 305 to make the pressure plate 402 fit against the connecting plate 404. Insert the corresponding slot 309 on the pressure plate 307 into the corresponding limiting block 306. Then rotate the pressure plate 307 90 degrees so that the limiting block 306 corresponds to the positioning groove 310 and is inserted into the positioning groove 310. Then place the chip in the limiting frame. Inside 301, the base 1 and cover 2 are closed. Then, the connecting plate 404 is pushed into the deep part of the slot 405. Finally, the threaded rod 401 is rotated to push the pressure plate 307 to press. At this time, the sliding rod 305 will press the plate 402 down separately. When the pressure plate 307 presses the chip, the plate 402 presses the connecting plate 404 to fix it, and then the test can be carried out. After the test is completed, the cover 2 is opened, and the chip can be taken out through the opening slots 302 on both sides. The limiting frame 301 can be taken out through the vertical slot 303.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An FT test fixture, comprising a base (1), wherein a cover plate (2) is hinged to the top of the base (1), and a first cavity (101) is provided inside the base (1), wherein a probe (102) is fixedly connected inside the first cavity (101), characterized in that: It also includes a limiting frame (301) and a pressure plate (307). The limiting frame (301) has opening slots (302) on both sides. The first cavity (101) has vertical slots (303) on both sides corresponding to the positions of the opening slots (302). The bottom of the cover plate (2) has a second cavity. A sliding rod (305) is slidably connected through the second cavity. The bottom of the sliding rod (305) is fixedly connected to a limiting block (306). The pressure plate (307) has a connecting groove (308). The top of the connecting groove (308) has a connecting groove (308) through it. The connecting groove (308) has a positioning groove (310) inside it.

2. The FT test fixture as described in claim 1, characterized in that: A threaded rod (401) is threaded through the top of the cover plate (2), a pressure plate (402) is fixedly connected to the top of the slide rod (305), a slide groove (403) is threaded through the cover plate (2), a connecting plate (404) is slidably connected in the slide groove (403), a slot (405) is provided on the base (1), and one end of the connecting plate (404) slides in the slot (405).

3. The FT test fixture as described in claim 2, characterized in that: The bottom of the vertical groove (303) is lower than the bottom of the limiting frame (301), the length and width of the second cavity are the same as the length and width of the first cavity (101), and the length of the slide rod (305) is greater than the thickness of the cover plate (2).

4. The FT test fixture as described in claim 3, characterized in that: The positioning groove (310) and the slot (309) are provided in two sets and arranged in a cycle. The angle between the positioning groove (310) and the adjacent slot (309) is 90 degrees. The height of the limiting block (306) is the same as the thickness of the slot (309).

5. The FT test fixture as described in claim 4, characterized in that: The threaded rod (401) is attached to the top of the pressure plate (307), the bottom of the pressure plate (402) is attached to the top of the connecting plate (404), and the threaded rod (401) is located on one side of the slide rod (305).

6. The FT test fixture as described in claim 5, characterized in that: The slot (405) is L-shaped, and the connecting plate (404) is Z-shaped.

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