Pogopin's real scientific name

　　Pogopin's real scientific name is "Spring Loaded Contact", which is a precision connector used in electronic products, widely used in mobile phone antennas, connections between batteries and mobile phone motherboards and other precision shock-resistant components. The main function of Pogopin in the design is to connect, effectively ensure the data and current transmission between board-to-board, board-to-wire or other parts. The factory principle of pogopin is to change its working height through the compression and extension of the spring to match the distance between the connecting parts. There are roughly 3 parts to a Pogo pin. Needle, spring, needle tube, needle, and material are generally selected as Becu or SK. Both have advantages and disadvantages. Becu has good conductivity, but lacks hardness, and SK has high hardness, but it is easy to rust. Spring, is also more important, SUS SWP, especially now that there are more and more PB free products, it directly causes the pins or BGA solder balls to become soft or hard. During the test process, it was found that the original yield was very high, After changing the solder ball or lead material, the yield rate is extremely poor. The choice of spring pressure is very important. The test environment has very strict requirements on the material of the spring. The high and low temperature test directly affects the working life of the probe. There are many needles and materials to choose from, and PB materials are generally used. The main reason for the low yield may be due to the increase of impedance during the test of the probe. The increase in impedance is mostly caused by the wear of the needle during the test, the damage of the coating, and the tinning of the needle. How to solve the phenomenon of tin hanging on the needle shaft and the problem of soft coating. The alloy coating can effectively solve this problem, increase the hardness of the needle shaft and the surface of the alloy material is basically resistant to welding and frying. The special Nanotek brush can effectively solve the problem of hanging tin. ‍‍

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