PCB circuit board is the necessary circuit board for equipment and electrical appliances, and is also the necessary carrier for software implementation. Different equipments have different PCB materials. For Rigid Printed Circuit Board (RPCB), there are many kinds of circuit board material are generally divided into the following categories:

1. Phenolic PCB paper substrate

Because this kind of PCB board is composed of pulp wood pulp, etc., it is sometimes used as cardboard, V0 board, fire-retardant board and 94HB, etc. Its main material is wood pulp fiber paper, which is pressed and synthesized by phenolic resin. board.

The paper substrate is characterized in that it is not fireproof, can be punched, has low cost, is inexpensive, and has a relatively low density. Phenolic paper substrates We often see XPC, FR-1, FR-2, FE-3 and the like.

2, composite PCB substrate

This also becomes a powder board, which is made of wood pulp fiber paper or cotton pulp fiber paper, and is supplemented with glass fiber cloth as a surface reinforcing material. The two materials are made of flame retardant epoxy resin. There are single-sided semi-glass 22F, CEM-1 and double-sided semi-glass fiberboard CEM-3, among which CEM-1 and CEM-3 are the most common composite copper-clad laminates.

3, glass fiber PCB substrate

Sometimes it also becomes epoxy board, fiberglass board, FR4, fiberboard, etc. It uses epoxy resin as a binder and glass fiber cloth as a reinforcing material. This kind of circuit board has a higher operating temperature and is less affected by the environment. This type of board is often used in double-sided PCBs, but the price is relatively high compared to the composite PCB substrate, and the thickness is usually 1.6MM. The substrate is suitable for various power boards and high-level circuit boards, and is widely used in computers, peripheral devices, and communication equipment.