Thermal stability: The SMT connector needs to be welded at high temperature environment, so the materials used are required to have good thermal stability and be able to withstand high temperature.
Conductivity: The conductor and contact of the connector should have good conductivity to ensure the stability and reliability of signal transmission.
Corrosion resistance: The SMT connector needs to be used in a harsh environment, such as moisture, corrosion, etc., so the materials used are required to have good corrosion resistance and can work steadily for a long time.
Mechanical strength: The SMT connector needs to withstand mechanical stress and vibration, so the material used is required to have good mechanical strength and is able to withstand a certain force and vibration.
Plasticity: SMT connectors need to be plastic to meet the requirements of different shapes and sizes during processing and installation
"Are you sure of the material requirements for such a detailed SMT connector?"Edit by Deso Hardware Electronics.
With the increasing development of electronic technology, a variety of connectors in the 3C equipment in their own role, although convenient to enrich our daily life. But in the product quality is also facing a severe test, in the current trend of smaller and smaller connector volume, the connector material is undoubtedly a huge challenge! SMT connector is a kind of surface adhesive electronic connector, according to the application scope of the specific electronic connector and the process flow.
The following is mainly by the cable hardware electronics to explain the SMT connector for the material requirements of seven;
1. Mechanical properties requirements of the SMT connector materials
Because the connector wants to fix the terminal, so the material must have a certain strength and stiffness. In the later stage, the swing test and shock test should be carried out to detect the quality of the product, so it should have a certain toughness.
2. Thermal performance requirements of the SMT connector materials
Because the temperature process of lead-free welding in the later stage is about 260 degrees, about 15s, the connector material must have high temperature resistance, that is, the short-term heat resistance index HDT should meet the conditions. The long-term use temperature (RTI index) does not need to be too high, depending on the function of the connector.
3. Electrical performance requirements for the SMT connector materials
All the plastic parts of the connector are insulated, high frequency products may need to have certain requirements for the dielectric constant and loss factor, some shell and bracket products also need to have antistatic requirements.
4. Flame retardant environmental protection requirements for SMT connector materials
Most of the products of connector materials basically comply with UL94V0. Under the trend of environmental protection, most of them pursue halogen-free, but at present.
5. Physicochemical performance requirements of the SMT connector materials
Because the connector needs to contact the solder paste, salt spray test, and some customer needs, so the connector material should have a certain chemical resistance. For class I / O appearance products, they also need UV light resistance, in addition to low water absorption and dimensional stability.
6. Appearance and staining requirements of the SMT connector material
Now the connector, whether on the motherboard or in other parts, need to have a variety of color requirements, so the connector material must have a good dyeing performance, and in the case of high temperature also has a good color stability, not easy to fade.
seven. Processivity requirements for the SMT connector materials
Processing performance is very important, because the connector industry is low profit, volume, so the number of die holes are more, so the connector material needs to process window wide, low scale, low corrosion, in order to reduce the loss of shutdown. Some products also require high flatness and low warping.
