PCBWay will enjoy the holiday on Oct 1st to Oct 3rd. All orders still can be placed. However, the delivery date shall be postponed as the express company will pick up the package after Oct 3rd.

 

PCB Prototype the Easy Way

Full feature custom PCB prototype service.


PCB Annular rings

What is an Annular Ring?

A copper ring attached to the surface of a pad around a connecting hole wall.

Drill size (Aperture) is the the size of the hole diameter.

image.png

An Annular Ring Width = (diameter of the pad - diameter of the hole) / 2

Normally Min width for Annular Ring is 0.15mm(6mil).

Drill Sizes (CNC): 0.2-6.3mm.(Min drill size is 0.2mm, max drill is 6.3mm. Any holes greater than 6.3mm or smaller than 0.3mm will be subject to extra charges)

image.png

Eg: 

1. R=0.12mm  H=0.2MM  D=0.44MM

The Annular Ring Width=(0.44-0.2)/2=0.12mm

2. R=0.15mm  H=0.3MM  D=0.6MM

The Annular Ring Width=(0.6-0.3)/2=0.15mm

Comments (0)
This message here is only a suggestion supplement to the above content, and does not for trading operations such as orders. If you have any urgent questions or order issues, please contact your sales rep.
You can only upload 1 files in total. Each file cannot exceed 2MB. Supports JPG, JPEG, GIF, PNG, BMP