PCB Tech - What materials are generally made of pcb boards

What material is the PCB board made of? What kind of material is better for the PCB board? Different circuit boards have different materials. How do you know which one will be better? The following Shenzhen Tianditong SMT chip processing factory will tell you about what materials PCB boards are generally made of and what are the advantages of PCB boards made of various materials.

What is copper clad laminate

The main material of printed circuit board (pcb board) is copper clad laminate, and copper clad laminate (copper clad laminate) is composed of substrate, copper foil and adhesive. The substrate is an insulating layer board composed of polymer synthetic resin and reinforced materials; the surface of the substrate is covered with a layer of pure copper foil with high conductivity and good solderability, the usual thickness is 35-50/ma; the copper foil is covered on the substrate The copper clad laminate on one side is called a single-sided copper clad laminate, and the copper clad laminate with copper foil on both sides of the substrate is called a double-sided copper clad laminate; whether the copper foil can be firmly covered on the substrate is completed by an adhesive. The thickness of commonly used copper clad laminates are 1.0mm, 1.5mm and 2.0mm.

What are the commonly used copper clad laminates

The following types of copper clad laminates are commonly used:

FR-1 ──Phenolic cotton paper, this base material is generally called bakelite (more economical than FR-2).

FR-2 ──Phenolic cotton paper.

FR-3 ──Cotton paper, epoxy resin.

FR-4──Woven glass, epoxy resin

FR-5 ──Glass cloth, epoxy resin.

FR-6 ──Masked glass, polyester.

G-10 ──Glass cloth, epoxy resin.

CEM-1 ──Cotton paper, epoxy resin (flame retardant).

CEM-2 ──Cotton paper, epoxy resin (non-flame retardant).

CEM-3 ──Glass cloth, epoxy resin.

CEM-4 ──Glass cloth, epoxy resin.

CEM-5 ──Glass cloth, polyester.

AIN ──Aluminum Nitride.

SIC ──Silicon Carbide.

There are also many types of copper clad laminates. According to different insulating materials, it can be divided into paper substrate, glass cloth substrate and synthetic fiberboard; according to different binder resins, it can be divided into phenolic, epoxy, polyester and polytetrafluoroethylene; it can be divided into general and special types according to the purpose. .

The structure and characteristics of PCB copper clad laminates commonly used in China

1) Copper-clad phenolic paper laminate is a laminate made of insulating impregnated paper (TFz-62) or cotton fiber impregnated paper (1TZ-63) impregnated with phenolic resin by hot pressing. Adhesive paper on both surfaces can be attached Use a single sheet of alkali-free glass dipping cloth, and cover one side with copper foil. Mainly used as a printed circuit board in radio equipment.

2) Copper clad phenolic glass cloth laminate is a laminate made of alkali-free glass cloth impregnated with epoxy phenolic resin and hot pressed. One or both sides are coated with copper foil, which has light weight, electrical and mechanical properties. Good, convenient processing and other advantages. The surface of the board is light yellow, if melamine is used as the curing agent, the surface of the board is light green and has good transparency. Mainly used as a printed circuit board in radio equipment with higher operating temperature and operating frequency.

3) Copper-clad PTFE laminate is a copper-clad laminate made of PTFE board as the base plate, coated with copper foil and hot-pressed. Mainly used for printed boards in high frequency and ultra high frequency circuits.

4) Copper-clad epoxy glass cloth laminate is a commonly used material for hole metallized printed circuit boards.

5) The soft polyester copper-clad film is a ribbon-shaped material made of polyester film and copper by hot pressing. In the application, it is rolled into a spiral shape and placed inside the equipment. In order to reinforce or prevent moisture, it is often poured into a whole with epoxy resin. Mainly used as flexible printed circuit and printed cable, and can be used as a transition line for connectors.