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Composition of PCB materials

The composition of PCB materials generally consists of four layers, which are thermally laminated into a single layer. The composition of PCB materials include the following layers from top to bottom: Screen printing/Solder mask/Copper/Substrate.

The last layer is the base material, made of glass fiber, also known as FR4, and the FR letter represents "flame retardant.". This substrate provides a solid foundation for PCB, although the thickness can vary according to the purpose of the given circuit board.

There are some cheaper circuit boards on the market. They don't use the above PCB material but are made of phenolic resin or epoxy resin. Because of the board of the heat sensitive, they are easy to lose its laminate. These inexpensive circuit boards are usually easy to recognize by the smell produced during soldering.

The second layer of the printed circuit board is copper, which is laminated onto the substrate with a mixture of heat and binder. The copper layer is very thin, and there are two such layers on some circuit boards - one above the base plate and the other below the base plate. Only one layer of copper PCB is often used for cheaper electronic devices.

A large number of the copper clad laminate (CCL) can be divided into different classification standards according to different classification standards, including reinforcement material, the resin binder, flammability, copper clad laminate performance.

The composition of PCB materials generally consists of four layers, which are thermally laminated into a single layer.The composition of PCB materials generally consists of four layers, which are thermally laminated into a single layer.

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