Many people have heard of the English abbreviation “PCB”. But what does it really mean? In fact, it is very simple, that is, Printed Circuit Board (PCB circuit board，PCB）。 It will appear in almost every kind of electronic device. If there are electronic components in a device, they are all mounted on PCBs of different sizes. In addition to fixing various small parts, the main function of PCB is to provide electrical connection between various parts on the top. As electronic devices become more and more complex, more and more parts are needed, and the circuits and parts on the PCB become more and more dense. Bare boards (with no parts on them) are also often referred to as “printed wiring boards.” Wiring Board（PWB）”。 The base plate of the board itself is made of an insulating, heat-insulating, and inflexible material. The fine wiring material visible on the surface is copper foil. Originally, the copper foil covers the entire board, but during the manufacturing process, part of it is etched away, and the remaining part becomes a mesh of fine wiring. These lines are referred to as conctor Pattern), or wiring, and is used to provide the electrical connections of parts on a PCB. Usually the color of PCB is green or brown, which is solder Mask). It is a protective layer of insulation, which can protect copper wires and prevent parts from being soldered in the wrong place. A layer of silk is also printed on the solder mask screen）。 Words and symbols (mostly white) are usually printed on this to indicate the position of each part on the board. The screen-printed surface is also referred to as a legend.
what does PCB really mean?
