As I know single or doubled sided board is a substrate with copper foil top, and then printed circuit out. But 4layer bo
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As I know single or doubled sided board is a substrate with copper foil top, and then printed circuit out. But 4layer bo
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Common multilayer board by pressing with some pieces of core board, and choose the thickness of the core board and pp according to the requirements of the product. The more layers the thicker boards,now without copper core can do 0.050mm thickness, you can calculate it,