Copper-clad laminate is a substrate for processing and manufacturing PCB circuit boards. It is used in PCB boards to support various components and realize electrical connection or electrical insulation between them. So, do you know what are the main raw materials for manufacturing PCB copper clad laminates?
1. Resin
Resins for copper plates include phenolic, epoxy, polyester, polyimide, etc. Among them, phenolic resin and epoxy resin are used in the largest amount.
Phenolic resin is a kind of resin formed by polycondensation of phenols and aldehydes in acidic medium or alkaline medium. Among them, the resin polycondensed with phenol and formaldehyde in alkaline medium is the main raw material of paper-based foil board.
Epoxy resin is the main raw material of glass cloth-based foil-clad board, which has excellent bonding performance and electrical and physical properties.
2. Impregnated paper
Commonly used impregnated papers are cotton linter paper, wood pulp paper and bleached wood pulp paper. Cotton linter paper is made of cotton fibers with shorter fibers, which is characterized by better resin penetration, and better punching and electrical properties of the board. Wood pulp paper is mainly made of wood fiber, which is generally cheaper than cotton linter paper; and has higher mechanical strength, and the use of bleached wood pulp paper can improve the appearance of the board.
3. E-glass cloth
Alkali-free glass cloth is the reinforcing material of glass cloth base and copper plate. For special high-frequency applications, quartz glass cloth can be used.
4. Copper foil
Copper foil can be divided into rolled copper foil and electrolytic copper foil. Rolled copper foil is mainly used in flexible printed circuits and other special purposes. In the production of wheat copper plates, electrolytic copper foil is widely used.
