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10. The design of PCB (multiple layer board)--Basic requirement of designing multiple layer PCB VOL2

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The requirements of wire cloth and wiring   Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  In general, PCB multilayer board wiring is performed according to circuit function. In outer wiring, it is required to have a lot of wiring in the welding surface, and the components are less wiring, which is beneficial to the maintenance and platoon of printing plate. Thin, tight conductor and easily disturbed signal lines, usually arranged in the inner layer. The large area of copper foil should be evenly distributed in the outer layer, which will help to reduce the warping of the plate and make the plating more uniform on the surface. In order to prevent the short circuit between the surface and the printed wire and the mechanical processing, the distance of the conductive graph in the inner and outer layers should be greater than 50mil. Wire direction and line widt...
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7. The design of PCB（multiple layer board)-- Process of multilayer board

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Multiple Layer Board   Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  PCB Multilayer Board means multilayer board used in electrical product, it involves wild area, such as home appliance, computer accessories, communication, toy, instrument, LED and so on. PCB(printed circuit board) Multilayer Board is consist of track on several layer of insulation substrate and pad, it has two function: conduct every layer ’ s circuit, insult mutual layer. As the develop of SMT, the launch of new SMD (such as QFP, QFN, CSP, BGA), electrical product become more intelligent and smaller. Since HDI is created, the develop these process technology lead the design of PCB to multiple layer, and high density.   1 . Process of multilayer board   1. PCB which has draw the track: Put on the board, acidity deoiling, scanning rinsing, second reflux rinsing, micro etch, ...
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9. The design of PCB (multiple layer board)--Basic requirement of designing multiple layer PCB VOL1

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6. Basic requirement of designing multiple layer PCB       Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  Determine out shape, size, layers. Any plate, there are problems with other structural parts, so the shape and size of the printing plate must be based on the product machine structure. However, in terms of production process, it should be as simple as possible, generally for the long width ratio not too wide of the rectangle, to facilitate assembly, improve production efficiency, lower labor cost. The number of layers must be based on the circuit performance, the size of the plate and the intensity of the line. In the case of PCB multilayer, the application of four layers and six laminates is the most widely used, with four layers as an example, which is two conductor layers (surface and welding surface), a power supply layer and a layer. Th...
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