What is a double-sided circuit board? What are the classifications of double-sided circuit board materials?

　　Double-sided circuit board refers to copper on both sides and metallized holes, that is to say, there is copper on both sides, and there is copper in the hole. For the double-sided circuit board , copper in the hole is particularly important, because Z Early on, the most difficult thing is that there is copper in the hole (how to have copper on the hole wall without copper), which is an important basis for distinguishing double-sided and single-sided.

　　A circuit board has two sides, the top layer and the bottom layer. This is a double-layer circuit board . A double-layer circuit board is a double-sided copper-clad PCB. The double-layer circuit board has copper cladding and traces on both sides, and the lines between the two layers can be conducted through vias to form the required network connection.

　　Double-sided circuit board material classification

　　Generally, PCB board materials can be divided into two categories: rigid substrate materials and flexible substrate materials. The general rigid substrate material is copper clad laminate, which is made of reinforcing material (Reinforing Material), impregnated with resin adhesive, dried, cut, stacked into blanks, and then covered with copper foil, using steel plate as a mold, in a hot press Made by high temperature and high pressure forming.

　　There are many ways to classify copper clad laminates. According to the different reinforcing materials of the board, it can be divided into five categories: paper base, glass fiber cloth base, composite base (CEM series), laminated multilayer board base and special material base (ceramic, metal core base, etc.).

　　If classified according to the different resin adhesives used in the board, common paper-based CCIs include phenolic resins (XPc, XxxPC, FR-1, FR-2, etc.), epoxy resins (FE-3), polyester resins, etc. various types.

　　The common glass fiber cloth base CCL has epoxy resin (FR-4, FR-5), which is the most widely used glass fiber cloth base type at present. pcb double panel

　　In addition, there are other special resins (with glass fiber cloth, polyamide fiber, non-woven fabric, etc. as additional materials): bismaleimide modified triazine resin (BT), polyimide resin (PI) , Diphenylene ether resin (PPO), maleic anhydride imide - styrene resin (MS), polycyanate resin, polyolefin resin, etc. flat lens board

　　The above is the classification of double-sided circuit boards and double-sided circuit boards organized by the editor. I hope it will be helpful to you. If you are still unclear, please contact the QQ, WeChat or phone on the right, and we will have Professional staff will answer for you.