PCB concept-优快云博客

本文链接：https://blog.youkuaiyun.com/flydeveloper/article/details/86856

本文介绍了印刷电路板（PCB），它是固定电子元件的薄板，元件可通过通孔或表面安装。简单的PCB一面是元件和电线，另一面是互连电路，还可双面安装、有多层结构。连接采用金属条，常通过光刻胶和酸蚀刻制作。电脑等电子系统可能由多个PCB组成。

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printed circuit board

<hardware> (PCB) A thin board to which electronic components are fixed by solder. Component leads and integrated circuit pins may pass through holes ("vias") in the board or they may be surface mounted, in which case no holes are required (though they may still be used to connect different layers).

The simplest kind of PCB has components and wires on one side and interconnections (the printed circuit) on the other. PCBs may have components mounted on both sides and may have many internal layers, allowing more connections to fit in the same board area. Boards with internal conductor layers usually have "plated-through holes" to improve the electrical connection to the internal layers.

The connections are metal strips (usually copper). The pattern of connections is often produced using photo-resist and acid etching. Boards, especially those for high frequency circuits such as modern microprocessors, usually have one or more "ground planes" and "power planes" which are large areas of copper for greater current carrying ability.

A computer or other electronic system might be built from several PCBs, e.g. processor, memory, graphics controller, disk controller etc. These boards might all plug into a motherboard or backplane or be connected by a ribbon cable.

(1995-05-01)