高科技发展，人们需要性能高、体积小、功能多的电子产品，促使印制线路板制造也向轻、薄、短、小发展，有限空间，实现更多功能，布线密度变大，孔径更小。自1995 年至2005 年间，机械钻孔批量能力最小孔径从原来0.4mm 下降到0.2mm，甚至更小。金属化孔孔径也越来越小。层与层间互连所依赖的金属化孔，质量直接关系印制板可靠性。随着孔径的缩小，原对较大孔径没影响的杂物，如磨刷碎屑、火山灰，一旦残留在小孔里面，将使化学沉铜、电镀铜失去作用，出现孔无铜，成为孔金属化的致命杀手。
... double-sided assembly 双面组装 double-sided board 双面电路板 double-tuned circuit 双调谐电路 ...
基于82个网页-相关网页
... double-sided assembly 双面组装 double-sided board 双面电路板 double-tuned circuit 双调谐电路 ...
基于48个网页-相关网页
单双面电路板 PCB
复制一块双面电路板 IT Age
双面印刷电路板感光机 twin surface print circuit light-sensitizer
双面安装印刷电路板 dual-side mounting PC board
多层板生产工艺流程复杂，因此在交期上相对时间会比较长，价格也会略高于双面电路板产品。
Sandwich plate production process is complex, therefore, relatively in the delivery time is not long, the price will be slightly higher than the double-sided circuit board products.
金属铜的电阻率低，所以在印制电路板中，用来制备铜箔及双面板、多层板的孔金属化方面采用镀铜工艺。
The resistance of the copper rate is low, so in printed circuit board, used to prepare copper foil and double panel, produce multilayer prototypes via metallization copper with on the process.
每三个LED可以作为一段，软性印制电路板，背面带双面胶，用于粘贴，体积小，安装方便。
Each LED can be used as a period of three, soft printed circuit board, on the back with double-sided adhesive for paste, small size, easy installation.
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