What are the material requirements for SMT connectors?

With the development of electronic technology, all kinds of connectors perform their own functions in 3C equipment. Although it is convenient for our daily life, the quality of new products is also facing a severe test. Under the trend that the size of connectors is getting smaller and smaller, the material of connectors is undoubtedly a huge challenge! SMT connector is a kind of surface mounted electronic connector, and its specific requirements for materials are considered according to the application scope and process flow of the specific electronic connector. Then the connector manufacturer Huichengyuan will explain the specific requirements of SMT connectors to you! First, the mechanical properties of SMT connector materials require that the material must have certain strength and rigidity because the connector needs to fix the terminal. In the later stage, tests such as swing test and impact test shall be carried out to test the quality of new products, so they shall have a certain toughness. Second, the thermal performance requirements of SMT connector materials. Because the temperature of lead-free soldering process in the later stage is about 260 degrees, about 15 seconds, the connector materials must have high temperature resistance, that is, the short-term thermal index HDT must meet the conditions. The long-term service temperature (RTI index) does not need to be too high, depending on the function of the connector; III. The electrical performance of the SMT connector material requires that all plastic parts of the connector should be insulated. High-frequency products may have certain requirements for dielectric constant and loss factor, and some shell and bracket products also need to have antistatic requirements; 4. Requirements for flame retardancy and environmental protection of SMT connector materials The flame retardancy of most products of connector materials should basically conform to UL94V0. Under the trend of environmental protection, most of them pursue halogen-free, but at present, halogen-free and halogen-free account for about half; 5. Physical and chemical performance requirements of SMT connector materials Because connectors need to contact solder paste, salt spray test, and some customer requirements, connector materials should have certain chemical properties. For I/O appearance products, UV light resistance is also required, in addition to low water absorption and dimensional stability; 6. Appearance and dyeing requirements of SMT connector materials The current connectors, whether on the motherboard or in other parts, need to have various color requirements, so the connector materials must have good dyeing performance, and also have good color stability at high temperature, not easy to fade; 7. The processability of the SMT connector material requires that the processability is very important. Because the connector industry has low profits, there are many mold cavities. Therefore, the connector material needs a wide processing window, low mold scale and low corrosion to reduce the loss of downtime. Some products also require high flatness and low warpage.

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