main raw material of PCB ~ CCL.
date：2018-11-23 11:25:00
The main raw material of PCB ~ CCL
CCL, hence the name, is to cover the copper foil with insulating material with a certain rigid hard plate, which is used to process a PCB circuit board with conductive function. According to the material of the intermediate insulating layer of the sheet material (also called reinforcing material) ) can be divided into:
Cardboard: The reinforcing material of the middle layer is mainly made of poor phenolic resin, the material of the sheet is poor, and the flame retardant grade is HB or VO.
Composite substrate: The reinforcing material of the middle layer is mainly epoxy resin cellophane. The material of the sheet is better than the paper base, but it is worse than the fiber material, and the flame retardant grade is V0.
Fiberboard: The reinforcing material of the middle layer is mainly made of epoxy resin. The material of the sheet material is more commonly used, and it can meet the general requirements of the current electronic products. It is the most used sheet material. Flame retardant level is V0
According to the flame retardant grade, it can be divided into two types: 94V0 and 94HB.
There are also some other special types of PCB materials that are described as follows:
Halogen-free material: refers to a copper-clad board that does not contain halogen (fluorine, bromine, iodine, etc.) in the material. Because bromine generates toxic gases when burned, it does not meet current environmental requirements, so for some products with high requirements, export PCB boards in the European market have halogen-free requirements.
High Tg material: The so-called Tg value, now the electronic product requires the circuit board to withstand high temperature. At a certain temperature, the circuit board can not be burned, and the medium can be softened. The temperature at this softening is called the glass transition temperature (Tg value). The dimensional stability of the board.
Generally, the circuit board is not specially described, the Tg value is 135 degrees, and the high Tg material is divided into 150 degrees and 170 degrees.
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