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Does anyone have any data on topside reflow on 4L boards? 
We are seeing reflow on .062 4L boards and the thought is that the I/L copper 
thickness is different for reflowed vs non reflowed boards. The boards that 
reflowed showed ~.002" copper while the non reflowed boards showed ~.0012" 
copper. The data is not statistically valid--too few samples.
The construction is single ply 7628 for L1/L2 and L3/L4. Inner layers are 
planes.

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Subject: RE: DES: copper thickness
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Date: Mon, 29 Apr 96 11:46:00 EDT
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