Why is the performance of the shrapnel microneedle module stronger than that of the pogo pin probe m

　　The shrapnel micro-needle module and the pogo pin probe module are both test pin modules used in the testing of 3C lithium batteries, LCD, OLED screens, and mobile phone cameras. In the test, it can play the role of transmitting signals and conducting current. With the development of science and technology, the size of digital products is getting thinner and thinner, and the internal space parts are dense, so the precision and space requirements for the test needle module are also getting higher and higher. As a test connection electronic component used to test PCBA in electronic testing, what is the difference between the shrapnel microneedle module and the probe module?

　　From the analysis of the shape, structure, service life and performance of the shrapnel microneedle module and the probe module, we can gradually understand why the performance of the shrapnel microneedle module is stronger than that of the probe module.

　　1. Shape structure

　　Shrapnel microneedle module

　　The shrapnel microneedle module is an integrally formed shrapnel structure, made of nickel alloy/beryllium copper material, made by laser equipment and special process, and then hardened and gold-plated in the later stage. The shrapnel microneedle module has the characteristics of light and thin integration, the overall height and contact shape are easy to make according to customer requirements, different head shapes are used to contact different test points, which play a good connection role and ensure the test stability.

　　pogo pin probe module

　　The composition structure of the probe module is relatively complex, consisting of a spring, a needle, a needle tube, and a needle tail, and the surface is covered with gold plating. However, the thickness of the gold plating in production is difficult to control, the cost is relatively high, and the production process is also more complicated. During the test, the probe module may be stuck or broken, which is not conducive to the stability of the connection.

　　2. Service life

　　The shrapnel microneedle module has the characteristics of high service life. After testing, its average service life is more than 20w times. Under the condition of very good operation, environment and maintenance, it can reach 500,000 times. It has good performance, especially The advantage is obvious in high frequency test. The head of the shrapnel microneedle module has a self-cleaning design, which is maintenance-free and can ensure the long-term stability of the test.

　　The service life of the probe module has been tested at about 5w times. In the case of poor test environment, if dust and other impurities enter the inside of the probe, it will cause damage to the spring. Because the probe itself has no cleaning ability, so The probe must be replaced. This will not only increase the cost for enterprises, but also slow down the test progress and affect the test efficiency.

　　3. Performance

　　1. In the high current test, the shrapnel microneedle module has always been called "high current shrapnel microneedle module" because it can pass a current of up to 50A. During the conduction process, the current flows in the same material body, and the current transmission is stable. Strong overcurrent capability.

　　The probe module basically has no advantage in high-current testing, and the rated current that can pass is only 1A. Due to the large number of components, the current may attenuate in different parts, resulting in unstable testing.

　　2. In the field of small pitches, the shrapnel microneedle module has a wide range of possible values, which can usually be kept between 0.15mm-0.4mm, which has a stable and reliable solution. The pitch value that the probe module can deal with is between 0.3mm-0.4mm, and the lifespan and stability are poor in small pitches. It can be seen from this that the performance of the shrapnel microneedle module in the small pitch is far better than that of the probe module.

　　3. For the BTB connector male and female test, the shrapnel micro-needle modules use different head types to deal with the BTB male and female sockets, the serrated type contacts the BTB male socket, and the pointed type contacts the BTB female socket, which has better connectivity. To ensure the stability of the test. The test yield is as high as 99.8% (some products can reach 100%) without any puncture marks on the connectors.

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