Question: what are the different pcbs?
Answer: Single Sided PCBs. Single sided PCBs are the basic type of circuit boards, which contain only one layer of substrate or base material. ...  Double Sided PCBs. ...  Multi-layer PCBs. ...  Rigid PCBs. ...  Flexible PCBs. ...  Rigid-Flex-PCBs. ...  High-Frequency PCBs. ...  Aluminum backed PCBs.