Because FPC is a kind of FPC, its composition is the same as that of FPC. FPC is generally long strip, and both ends are designed to be pluggable needles, which can be directly connected to the connector or welded to the product. The middle is generally the line, because the FPC line needs a certain degree of flexibility, therefore, the substrate is generally rolled copper, bending resistance, flexibility.
The surface treatment process used in FPC wiring is generally gold sinking, and occasionally anti-oxidation. However, the anti-oxidation process cannot withstand high temperature, and the environmental bearing capacity is worse than that of the sinking gold. The prices of the two are similar. Therefore, most of them adopt the sinking gold process. In addition, there are processes such as tin plating and tin spraying, but the temperature resistance of FPC is generally below 280 degrees Celsius, while the temperature of tin spraying will be above 300 degrees Celsius, and the hardness of the solder paste is small, so it is rarely used.