The abbreviation "FR4" means: F (for flame) and R (for retardancies) and the 4 is a # 4 epoxy. FR4 features high flexural, impact, superior mechanical strength and bond strength at temperatures up to 130ºC. It is possible to use standard FR-4 with minimum Tg 135ºC for double sided boards which might pass trough 2-3 soldering processes.
My company always select the reliable PCB material supplier FR4 material to fabricate the PCBs for our customers. We call it "Standard FR4 Material". It can meet most customer application need.
Only for some very strict application you may need to select the below special quality material. Click the below links to check the material data sheet, properties, parameters and suggestion applications.
