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April 1997

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Subject:
tetra-etch of Teflon
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Ed Cosper <[log in to unmask]>
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From [log in to unmask] Mon Apr 7 14:
14:43 1997
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I have been told recently that a board shop is producing teflon plated thru circuit boards without using a tetra etch and using only a permanganate.

Is this possible? I have always understood that unless you tetra etched the material, you could not get good hole wall bond. Does anyone have any information in this?

Ed Cosper

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