Double-end high-frequency elastic sheet needle

Abstract

The utility model discloses a double-end high-frequency elastic sheet needle, which comprises a needle head part, an elastic sheet part and a needle tail part which are integrally formed, the elastic sheet part comprises a first coil part, a solid part and a second coil part, one end of the first coil part is fixedly connected with the bottom end of the needle head part, and the other end of the first coil part is fixedly connected with the solid part. The other end of the first coil part is fixedly connected with one end of the solid part, the other end of the solid part is fixedly connected with one end of the second coil part, and the other end of the second coil part is fixedly connected with the top end of the needle tail part. The top end of the needle head part is provided with a needle-point-shaped first conduction contact end and a needle-point-shaped second conduction contact end. According to the utility model, the contact stability during a conduction test is improved, and the abrasion of the elastic sheet needle and the surface of a product to be tested is reduced.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor continuity testing, specifically to a high-frequency stable contact spring pin. Background Technology

[0002] In the field of electronic components, semi-finished products, and finished product testing, continuity testing is very common, especially for products such as gold finger planar conductive contacts and flexible flat cables. Test probes are often used to make contact with the test equipment to achieve conductivity and complete the continuity test.

[0003] A spring-loaded probe is a supplement to a traditional probe. The structure of a spring-loaded probe typically includes a spring section, a head section, and a tail section. The spring section provides elasticity between the head and tail sections. The head section contacts the product under test, and the tail section connects to the testing equipment. During testing, the head section is brought into contact with the pin or contact point of the product under test to achieve continuity and perform a continuity test.

[0004] However, with the development of technology, the requirements for the test state of the spring needle and the signal propagation loss (i.e., high frequency) are becoming higher and higher. When the conventional spring needle is pressed down, the needle head will rotate slightly and shift laterally due to the twisting of the coil in the spring part, which will affect the stability of the test and the service life of the needle head. It will also cause wear on the surface of the product under test. Therefore, the existing spring needles cannot meet the high frequency requirements of continuity testing. Utility Model Content

[0005] To overcome the aforementioned problems, the purpose of this utility model is to provide a double-headed high-frequency spring pin for semiconductor continuity testing, which improves the stability of contact during continuity testing and reduces wear on the spring pin and the surface of the product under test.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a double-headed high-frequency spring needle, comprising an integrally formed needle head, spring portion, and needle tail portion. The spring portion includes a first coil portion, a solid portion, and a second coil portion. One end of the first coil portion is fixedly connected to the bottom end of the needle head, the other end of the first coil portion is fixedly connected to one end of the solid portion, the other end of the solid portion is fixedly connected to one end of the second coil portion, and the other end of the second coil portion is fixedly connected to the top end of the needle tail portion. The top end of the needle head is provided with a needle tip-shaped first conductive contact end and a second conductive contact end.

[0007] Preferably, the first conductive contact end and the second conductive contact end are arranged parallel to each other, and there is a certain gap between them.

[0008] Preferably, the needle head is provided with a fixing engagement part that engages with the fixture, the fixing engagement part allows the spring needle to be inserted into the fixture and locked in place, fixing its position.

[0009] Preferably, the fixing snap-fit ​​portion is located between the first conductive contact end and the second conductive contact end, and the first conductive contact end, the fixing snap-fit ​​portion, and the second conductive contact end are U-shaped.

[0010] Preferably, the first coil section and the second coil section are telescopic springs, and their structures may be completely identical or different.

[0011] Preferably, the solid portion is used to support the first coil portion and the second coil portion, and will not deform as the first coil portion and the second coil portion expand, contract, or bend.

[0012] The beneficial effects of this invention are as follows: During the pressing process, the first and second conductive contact ends of the needle tip can be pressed down simultaneously, almost vertically, with almost no rotation or lateral displacement. This results in very little wear on the needle itself and the surface of the product under test, improving contact stability and enabling the transmission of high-frequency signals. It is also suitable for products with low flatness requirements and can accommodate products with height differences. By adding a solid part between the first and second coil parts, and through multiple simulations under different conditions, it is found that signal loss during transmission can be effectively reduced. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0014] Figure 2 This is a schematic diagram of the compressed state in this embodiment.

[0015] In the figure: 1. First conductive contact end; 2. Second conductive contact end; 3. Fixing snap-fit ​​part; 4. First coil part; 5. Solid part; 6. Second coil part; 7. Needle tail part; 8. Needle head part; 9. Spring part. Detailed Implementation

[0016] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0017] See Figures 1-2This embodiment discloses a double-headed high-frequency spring needle, including an integrally formed needle head 8, spring portion 9, and needle tail 7. The spring portion 9 includes a first coil portion 4, a solid portion 5, and a second coil portion 6. One end of the first coil portion 4 is fixedly connected to the bottom end of the needle head 8, and the other end of the first coil portion 4 is fixedly connected to one end of the solid portion 5. The other end of the solid portion 5 is fixedly connected to one end of the second coil portion 6, and the other end of the second coil portion 6 is fixedly connected to the top end of the needle tail 7. The top end of the needle head 8 is provided with a needle tip-shaped first conductive contact end 1 and a second conductive contact end 2. The first conductive contact end 1 and the second conductive contact end 2 are arranged parallel to each other, and there is a certain gap between them, which can be set to be relatively large.

[0018] The needle head 8 is provided with a fixing engagement part 3 that engages with the fixture. The fixing engagement part 3 is located between the first conductive contact end 1 and the second conductive contact end 2. The first conductive contact end 1, the fixing engagement part 3, and the second conductive contact end 2 are U-shaped. The first coil part 4 and the second coil part 6 are telescopic springs, and their structures may be completely identical or different. The solid part 5 is used to support the first coil part 4 and the second coil part 6 and will not deform with the extension and bending of the first coil part 4 and the second coil part 6.

[0019] In use, the spring needle is inserted into the fixture and locked in place by the fixing snap-fit ​​part 3. The needle tail 7 is pre-compressed with a small section. The first conductive contact end 1 and the second conductive contact end 2 come into contact with the product to be tested. The elastic force is generated by the bending deformation of the first coil part 4 and the second coil part 6. At this time, the spring needle is already in a compressed state. Then, the first conductive contact end 1 and the second conductive contact end 2 of the spring needle are pressed down. Since the first conductive contact end 1 and the second conductive contact end 2 are pressed down at the same time, they cannot rotate or move. The pressure is almost vertical, so there will be no scratching of the spring needle itself and the surface of the product to be tested. The contact state hardly changes during the pressing process. While ensuring the service life of the spring needle, it can also increase the stability of the contact.

[0020] If the product under test is not perfectly horizontal or has a height difference or slight deviation in the vertical direction, when the first conductive contact 1 presses on the contact point of the product under test, the second conductive contact 2 will have no pressure. At this time, the first conductive contact 1 will be slightly higher than the second conductive contact 2 until the second conductive contact 2 also contacts the product under test. There will be no single point of poor connection. At this time, both contact ends are pressed down by force at the same time, which can still be regarded as a vertical pressing state.

[0021] After the external load is removed, the first coil section 4 and the second coil section 6 of the telescopic spring structure return to their original positions, and the spring pin returns to its initial length. Since high-frequency signals are characterized by short waveform periods, a larger cross-sectional area is required to reduce signal attenuation and interference during transmission. Therefore, a solid section 5 is added between the first coil section 4 and the second coil section 6. Multiple simulations under different conditions demonstrate that this method can more effectively reduce signal loss during transmission.

[0022] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A double-ended high-frequency cannula needle comprising a needle head portion, a cannula portion and a needle tail portion which are integrally formed, characterized in that, The elastic sheet part comprises a first coil part, a solid part and a second coil part, one end of the first coil part is fixedly connected with the bottom end of the needle head part, the other end of the first coil part is fixedly connected with one end of the solid part, the other end of the solid part is fixedly connected with one end of the second coil part, the other end of the second coil part is fixedly connected with the top end of the needle tail part, the top end of the needle head part is provided with a needle tip-shaped first conducting contact end and a second conducting contact end.

2. A double-ended high-frequency tabbed needle according to claim 1, wherein, The first conducting contact end and the second conducting contact end are arranged in parallel with each other.

3. The double-ended high-frequency tabbed needle of claim 1, wherein, A fixed clamping part for clamping with a jig is arranged on the needle head part.

4. A double-ended high-frequency tabbed needle according to claim 3, wherein, The fixed clamping part is located between the first conducting contact end and the second conducting contact end.

5. The double-ended high-frequency tabbed needle of claim 1, wherein, The first coil part and the second coil part are respectively elastic sheets, and the structures of the two are completely same or different.

6. A double-ended high-frequency tabbed needle according to claim 5, wherein, The solid part is used for supporting the first coil part and the second coil part, and does not deform with the expansion and contraction of the first coil part and the second coil part.

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