What is the smallest hole size achievable on a printed circuit board (PCB)?
The final diameter of the hole, also known as the finished diameter, in a PCB is determined after plating and surface finish. The smallest hole size finish is 0.2mm and will be specified by the PCB designer.
The drill size is larger than the finished diameter as the holes in a printed circuit board are drilled before plating and surface finish. As a general rule, we add 0.1mm to the hole diameter to allow for the plating thickness and surface finish down the hole.
For more advice about PCB hole sizes, please call us on 01462 417400 at any time.