It can range from .0010-.0013". Typically it is around .0012, but after cleaning it is closer to .0011. ______________________________ Reply Separator _________________________________ Subject: Thickness of copper on PCB Author: [log in to unmask] at SMTPLINK-HADCO Date: 6/26/96 10:09 AM Hello all, here's a simple query - what is the thickness in inches (or microns) of one-ounce copper on PCBs. I know that I should know this already, but ...... Thanks and regards, Tom.