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Subject:	Re: Micro-inch to copper weight conversion...
From:	Donald Vischulis <[log in to unmask]>
Date:	Fri, 30 May 2003 11:39:24 -0500
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Steve

The nominal thickness for 1 ounce copper is .0014 inch which is the same as 1400 microinches.  This means that for 170 microinches you have about .12 ounce copper in the thin spot.  That's thin enough to act as a fuse if there is any current flow.

Don Vischulis

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