There are single-sided printed circuit pattern we said PCB, double-sided printed circuit pattern, and then double-sided printed wiring board formed by metallization rj45 ethernet connector holes, we called double panel. If you use a double-sided for the inner, two-sided or two-sided as to make the outer lining, two-sided printed circuit boards for the outer layer, through the positioning system and insulation material are alternately bonded together and terminal block plug pattern according to the design requirements for the interconnection of printed circuit boards become four, six of the printed circuit board, also known as multi-layer printed circuit boards. Now more than 100 layers of practical printing plug in terminal block up.
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