双面电路板主要是为了解决复杂的设计和面积的限制，在电路板的两侧安装元件。
双面PCB解决传统柔性电路复杂,过程中双PCB容易出现虚焊,只适用于小电流通过缺陷,电路板的正面和背面是由覆铜层压板或铝条板衬底通过蚀刻形成导电层,其特点是，所述正导电层的导电层和所述背面在需要导电通道的位置上设有由所述穿刺方式形成的通孔。本实用新型专利技术采用刺穿式，元件表面及背面导电层的导电快捷方便，节省了大量复杂的工艺流程，提高了生产效率。
双面PCB的两面都有接线。但是，要使用导线的两边，就必须在两边之间有合适的电路来连接。电路之间的“桥”称为导通孔。导孔是在PCB上，填充或扩散金属的小孔，它可以与导体的两侧相连。因为双面PCB的面积比单面板大很多，而且由于布线可以互相交错(可以绕到另一侧)，它比单面板在电路上更适合使用。在严格意义上,双面电路板是一个非常重要的PCB板,他的使用是非常大的,看到不双面PCB板PCB也非常简单,我相信的朋友的单面板的理解是完全可以抓住,双面PCB是单面的扩展,它指的是单面电路板的线不够转到对面，双面电路板还有一个重要的特点就是有导通孔。简单点就是两边走线，两边都有线!一句话就是:双面线板就是双面PCB!有些朋友会问，比如一个板双面线，双PCB但只有一面有电子零件，这样的板到底是双面PCB还是单面板呢? The answer is obvious, such a board is double-sided PCB, just on the double-sided PCB board on the plate on the parts. Multilayer circuit board to distinguish the PCB according to the number of wiring surface to determine the process of difficulty and processing prices, ordinary circuit board side-by-side line and double-sided line, commonly known as single-sided and double-sided PCB, Double PCB but high-end electronic products, due to product space design constraints, in addition to surface wiring, the interior can be superimposed multi-layer lines, production process, The production of each layer after the line, and then through the optical equipment positioning, compression, so that multi-layer lines superimposed on a circuit board.