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May 2013

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TechNet <[log in to unmask]>
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Date:
Tue, 7 May 2013 10:35:24 -0500
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TechNet E-Mail Forum <[log in to unmask]>, Geert Willems <[log in to unmask]>
Subject:
Re: Solder mask contain low levels of sulfur
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Geert Willems <[log in to unmask]>
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If I remember well Barium Sulfate is used as a filler in solder masks.  Helps to get the right dielectric properties. Do you see Ba in your EDX spectra?

Geert Willems
imec, Belgium

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