PCB circuit board plates Some kinds of board - OurPCB
PCB circuit board consists of pads, vias, mounting holes, wires, components, connectors, filling, electrical boundary and other components, electronic products to meet the short, small, light, thin, high-density assembly requirements, to promote the circuit multi-layer board, super multi-layer development.
PCB circuit board main role is to connect components to use, using a wide range of PCB board, small toys, cell phones, radios, large aviation, railways and other large-scale high-end electronic products. PCB circuit board plates.
PCB board plates has FR-1, FR-2, FR-3, FR-4, CEM-1, CEM-3.
"FR" is representative of "flame retardant", FR-1, FR-2, CEM-1 and FR-3 are essentially the same, only a slight error on the mass, but not the three plates produced multilayer wiring board, and FR-4 and CEM-3 can be produced multilayer wiring board, FR-4 is the most common PCB board, is the most widely used sheet, the current line MILL many are using this plates so the relatively low price of FR-4 sheet of some, but the FR-4 plates also has a heat resistance, highest withstand temperatures up to 130 degrees.
PCB circuit board copper is one of the most important components of PCB circuit board, PCB circuit board copper thickness 18um, 25um, 35um, 50um and 70um, international copper plates thickness is divided into three 35um, 50um and 70um if needed thick electroplated copper foil is required to use thicker or other chemical reactions of the circuit board copper foil thicker. PCB circuit board plates
By grade level from bottom to high divided as follows:
94HB / 94VO / 22F / CEM-1 / CEM-3 / FR-4 details are as follows: 94HB: ordinary cardboard, not fire (most low-grade materials, die punching, can not do power Board) PCB circuit board plates
94V0: retardant cardboard (die punching) 22F: single half glass plate (mold punching)
CEM-1: single-sided glass plate (must be computer drilling, can not punch)
CEM-3: semi-sided glass plate (except double-sided cardboard outer panels are the most low-end materials, a simple two-panel can use this material, will be cheaper than FR-4 5 ~ 10 yuan / square meter)
FR-4: double-sided fiberglass board
Currently Bonded Copper extensive use of the following types, their characteristics as follows: There are a variety of copper-clad types of some kinds of PCB circuit board plates classification knowledge Bonded Copper copper clad board. PCB circuit board plates.
Reinforcements generally based on different boards, can be divided into: paper-based, fiberglass cloth classification pcb board, composite base (CEM series), laminated plywood base and specialty materials group (ceramics, metal core group, etc.) five class.
If adopted by board _) (^ $ RFSW # $% T classify different resin adhesives, paper-based CCI common are: phenolic resin (XPc, XxxPC, FR-1, FR-2, etc.), the ring various types of epoxy resin (FE-3), a polyester resin or the like.
CCL common glass fiber cloth with epoxy (FR a 4, FR-5), which is a glass fiber cloth type most widely used.