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Article: Autopsy of an acid copper plating bath: dangers of recycling.
- Article from:
- CircuiTree
- Article date:
- August 1, 2009
- Author:
CopyrightCOPYRIGHT 2009 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Being an independent laboratory, we do quite a bit of periodic monitoring for our customers. It is usually routine and the variation we observe is as expected. Occasionally though, we catch an anomaly that gets alarm bells ringing and calls for further investigation. The story that follows is one such instance.
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We perform acid copper plating bath analysis, TOC analysis, and tensile strength and elongation testing for a particular customer on a regular schedule. TOC is an acronym for total organic carbon and the analysis is a good way to monitor the build-up of organics in a plating solution. When a maximum amount is reached, the ...