how to improve the performance of the pogopin connector!Spring thimble manufacturer

　　The difference between the plastic materials of the female pogopin connector and how to improve the performance of the pogopin connector

　　PBT plastic material

　　is usually used to produce 2.54 pitch 180°/90° header headers, and the welding resistance temperature is only about 200°C. Due to the lower cost, higher strength, and friction resistance, this material still has many users to choose from. However, the use of this material has poor moldability, serious shrinkage, low melting temperature, and plastic melting during wave soldering.

　　6T plastic material

　　This material is generally used for 2.54 interval patch headers and 1.27 interval/2.0 interval series headers. The soldering resistance temperature is 260 degrees, and the instantaneous temperature can reach 290 degrees. Therefore, the cost of the female header pogopin connector produced using this material is slightly higher. The choice of this material generally has quality requirements for customers' products.

　　9T plastic material

　　This material is similar to 6T plastic material, generally used for 2.54 pitch SMD headers, 1.27 pitch/2.0 pitch series headers. The welding resistance temperature is 260 degrees, and the instantaneous temperature can reach 300 degrees. Because the use of this material is expensive, generally the 9T plastic material is used to produce pogopin connector products when customers have special needs.

　　LCP plastic material.

　　This material is suitable for the production of female header pogopin connectors of various pitch series. The soldering resistance temperature is 260 degrees, and the instantaneous temperature can reach 320 degrees. Because the material has a small coefficient of linear expansion. Injection molding has low shrinkage rate, high strength, outstanding elastic modulus, good heat resistance, high load deformation temperature, and some can reach 340 degrees or more. LCP also has excellent chemical resistance and air tightness, so the general pogopin connector is special LCP material of SMT is required. Because the material is expensive, the general customers who use this material have this requirement.

　　How to improve the performance of pogopin connector:

　　One, control the existing and about to form contact coating surface film

　　One of the main requirements for the electrical performance of the header and header is to establish and maintain a stable resistance for the header and header. To achieve this goal, a metal contact interface is needed to provide this inherent stability. Establishing such a contact interface requires the surface film to avoid or split during contact coordination. These two different choices clarify the difference between precious metals or rare metals and ordinary metals.

　　Second, to varying degrees, the nature of precious metal coatings (such as gold, palladium and their alloys) is free to the surface film

　　The metal contact that produces the interface is relatively simple for these coatings, because it only requires the movement of the companions of the contact surface during mating. This is usually easy to achieve. In order to maintain the stability of the contact interface impedance, the design of pin headers requires maintaining the precious metal properties of the contact surface and preventing the influence of external factors such as the diffusion of pollutants, base metal, and contact wear.

　　3. Ordinary metal plating, especially tin or tin alloy, its properties are naturally covered with an oxide film

　　The role of the "tin contact coating" is that this oxide is easily destroyed when it is combined, so the metal contact is easily established. The requirement of the pin header design is to ensure that the oxide film is broken when the pin header is mated, and the contact interface is not oxidized during the valid period of the electrical pogopin connector. Re-oxidation corrosion is an important performance degradation of tin contact coatings

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