![pcb visa pcb visa](https://images.newindianexpress.com/uploads/user/imagelibrary/2020/4/15/w1200X800/Ehsan_Mani_AP.jpg)
You can always check with your manufacturer for their minimum drill size and minimum annular ring for the manufacturing process. Via with 0.6mm hole and a 1mm solder pad is the most common size that can be found on most of the PCBs. Holes smaller than 0.15mm can only be drilled by laser drill.
![pcb visa pcb visa](https://www.iranvision.ir/content/images/thumbs/0003479_-ov4689nvp2475h_550_1.jpeg)
#PCB VISA MANUAL#
Vias from drills start from 0.15mm with 0.3mm solder pad and can drill as big as requested, but different sizes may require manual drilling which will further increase the production cost. This will make the drilling easier and hence will save a considerable time and thus the production cost as well. However, efficiency of the production process will increase if all the vias in the PCB are of the same size.
![pcb visa pcb visa](https://ae01.alicdn.com/kf/U9e359e3257a34653bd0a6e030f7a13d2V/fanuc-used-machine-cnc-Lathe-for-CNC-pcb-circuit-board-A20B-1005-0190.jpg)
These vias have very small diameter hole. There is another type of vias commonly used in high-density PCBs, known as micro-vias. Through vias : These type of vias connect two exterior layers. As the name suggests, through hole vias travel through the board, connecting traces on the outermost layers, and if required, on the inner layers as well. Hence these are called Blind/Hidden vias.īuried vias : These type of vias connect two interior layers. Buried vias remain completely encapsulated within the board, and none of their ends extend to any of the outer surfaces of the board. Blind/Hidden vias : These type of Vias connect an inner layer with the adjacent surface layer. Blind vias start on the surface on one side of the board, but do not extend to the other side, instead they finish on one of the internal layers.