Many PCB materials, such as glass fiberboard, paper substrates, metal substrates, as well as plastic-based, many, high-frequency PTFE, etc.
A. In terms of material
a. Organic materials
Phenolic resin, glass fiber/epoxy resin, Polyimide, BT/Epoxy, etc.
b. Inorganic materials
Aluminum, Copper-invar-copper, ceramic and so on. Mainly for its cooling function
B. Distinguish between finished hard and soft
a. Hardboard Rigid PCB
b. Flexible PCBs Figure 1.3
c. Rigid-Flex PCB See Figure 1.4
C. Structure points
D. By Usage: Communication/Consumer Electronics/Military/Computer/Semiconductor/Power Meters..., see Figure 1.8 BGA.
Another type of three-dimensional PCB that is injection molded is not described here because it is used sparingly.