As is known to all, via in PCB is full of pad, and connect the traces of two sided. via is the most improtant part of mulitylayer PCB.

Simply speaking, every hole on printed circuit board(PCB)  may be called via.

We can divide vis into two types in function: firstly, used for electro-connection among layers; secondly, used for fixing components. We also divide it into three types in technology: buried via, blind via and though hole.

Buried via is connecting holes which are located in the inner layers of the PCB and won’t extent to the surface. Blind via is connecting the inner layer traces with the top and bottom surfaces of the PCB. Through hole goes through the whole PCB, which is used to realize inter-connection or used as components mounting position hole. Due to the simple technique and low cost, most of PCBs use it rather than the other two via.

Now you can know the via in PCB well, for further information, please don’t hesitate to contact us.