PCB substrate materials are classified according to the nature of materials. They can be basically divided into paper based printed board, epoxy glass fiber cloth, printed board, composite substrate, printed circuit board, special substrate, printed board and other substrate materials.
(1) The use of paper-based High Quality PCBs china
substrate with fiber reinforced paper, dipped in resin solution (phenolic resin, epoxy resin, etc.) drying after coating with electrolytic copper foil coating, pressed by high temperature and high pressure. According to the American ASTM/NEMA standard model, the main varieties are FR-1, FR-2, FR-3 (flame retardant class XPC, XXXPC (non flame retardant). More than 85% of the worldwide paper based printed boards market is in asia. The most common and productive ones are the FR-1 and XPC printed boards.
(2) Epoxy glass fiber cloth, printed board, the substrate is epoxy or modified epoxy resin as adhesive, glass fiber cloth as reinforcing material. This type of printed circuit board is the largest and most widely used type of printed circuit board in the world. In the ASTM/NEMA standard, epoxy glass cloth has four types: G10 (flame retardant), FR-4 (flame retardant); G11 (heat retention strength, flame retardant), FR-5 (retention of heat intensity, flame retardant). In fact, non flame retardant products are decreasing year by year, and FR-4 accounts for most of Small volume pcb manufacturer
(3) Composite substrate, printed board, the substrate and core material used for such printed boards are made of different reinforcing materials. The copper clad material used mainly consists of CEM (composite, epoxy, material) series, among which CEM-1 and CEM-3 are the most representative. CEM one, 1 base material is glass fiber cloth, core material is paper, resin is epoxy, flame retardant; CEM-3 base material is glass fiber cloth, core material is glass fiber paper, resin is epoxy, flame retardant. The basic characteristics of composite printed boards are equivalent to those of FR-4, while the cost is lower and the machinability is superior to that of FR-4.
(4) Special substrate printed board metal substrates (aluminum, copper, iron and steel, invar) Tao Ci base, according to its characteristics, use can be made of metal (Tao Ci) based on single and double, multilayer printed circuit board or pcb board manufacturer china