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With the increasingly improved functions of electronic products, double-sided and single-sided circuit boards can no longer meet the requirements of quiet electronic products, so multi-layer precision circuit boards appear.
There are several types of boards:
1. Common multilayer PCB board.
2. High precision(HDI) multilayer PCB board.
3. Blind hole multilayer.
4. Buried hole multilayer
5.High frequency PCB mixed multilayer board.
The production of common multilayer board is on the basis of double size laminated and formed relatively simple.Precise alignment and compression are required.
However, high precision HDI, blind hole and buried hole Board can only be made with professional equipment(Laser Drill and etx..) and technology. On the basis of appeal, there are strict requirements on aperture, Pattern width and distance.
The requirements of high frequency mixed multilayer board are more demanding, and the selection of the board is different from other multilayer boards(Material used Rogers,PTFE,Ceramic and etc...)
The following is a simple multilayer board production instructions:
