Hey does anyone know what copper thickness is used on the BatchPCB boards? I have a feeling it’s 1 oz or 1/2 oz.

I kind of need it for a design that got sparked up by finding a rather hefty 350VA 24V transformer I rescued from being pitched at a company. So I need to know how thick the copper is before I can determine width (although I have the feeling when the hook up wires hit board, I’ll be needing 1- 1/2 inch traces).

Well, I guess the best answer would be to go to golden pheonix’s website. They seem to do mostly 1oz. copper, and that’s probably what they’re using on these. (Just in case anyone else would like to know, since I do remember at least a few PCB houses use 1/2 oz. copper as well.)

Okay, N00b question: What is meant by “1oz.” copper? Is that the amount of copper over a specific area of PCB? What area? How does this translate to microns of thickness, or whatever?

The weight of the copper is per square foot. So 1oz. of copper is spread out evenly over a square foot of raw copper clad board. I’m not quite sure of how to calculate for thickness. If I wanna know how much current I can pump through I just go to either of these sites:

The weight of the copper is per square foot. So 1oz. of copper is spread out evenly over a square foot of raw copper clad board. I’m not quite sure of how to calculate for thickness.

I worked this out once… I’ll try to do it again

The specific gravity of copper is 8.96 so there are 8.96 grams of copper in a cubic centimetre.

Ummmmm… hehe… tired brain

There are 28.35 grams in an ounce.

so… hmmm… one cubic inch of copper would weigh 2.54 * 2.54 * 2.54 * 8.96 = 146.83 grams, or 5.18 ounces.

so… 1 ounce of copper would be 1 inch * 1 inch * (1 / 5.18) = 0.193 inchs.

There are 144 square inches in a square foot, so 0.193 / 144 = .0013"

OK… So… ‘1 ounce copper’ in pcb terms is .0013" thick.