Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: Copper Thickness (Ounces vs Mills of Thickness)
From: "Roland F. Harriston" <rolohar@...>
Date: 2008-11-06
Use this.
This information is readily availabe via a Google search.
The copper in a PCB is rated in ounces, and represents the thickness of
1 ounce of copper rolled out to an area of 1 square foot. For example a
PCB that uses 1 oz. copper has a thickness of 1.4mils.
1/2 oz. 0.7 mils
1 oz. 1.4 mils
2 oz. 2.8 mils
Roland F. Harriston, PD