PCB的构成
- 玻璃纤维,也就是FR4,构成PCB的基层;
- 铜箔,PCB中构成电子电路互联的导线;
- 阻焊,也就是所谓的绿油层,保护电路,防止短路;
- 丝印,PCB中元器件等的信息标志。
PCB制作流程
- 在制作其它层前,先制作内部的玻璃纤维层(芯板层),是其它层的基础;
- 添加铜箔层,在玻璃纤维的上下各添加一层铜箔;
- 添加铜箔式样,将PCB设计的层压合板放在铜箔层的上面,来指示PCB设计中需要的铜箔;
- 确定铺铜式样,将层压合板和铜箔上铺上光刻胶卷,并放到紫外光灯下照射,这样铜箔就会被腐蚀出PCB设计中需要的线路;
- 清洗,将PCB放在化学试剂中清洗,去掉不需要的铜,保留需要的铜箔线路;
- 给铜箔刷绿油以保护铺铜线路;
- 添加丝印,成为“裸板”;
- 安装元器件。
参考文章
Printed Circuit Boards from 10,000 Feet – An Introduction for Electronics Beginners
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