There are various types of PCB circuit boards, which can be classified according to board, structure, process, etc. PCB circuit boards can be divided into PCB single panel, PCB double-sided board, and PCB multi-layer board according to structure; The common multi-layer boards are four or six layer boards, and complex PCB multi-layer boards can reach more than ten layers. This article introduces several common panels through classification.1. PCB single panelPCB single panel is the most basic cir...