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Article: Revisiting rework: excess copper dissolution remains a big problem for assemblers.(Pb-Free Lessons Learned)
- Article from:
- Circuits Assembly
- Article date:
- April 1, 2009
- Author:
CopyrightCOPYRIGHT 2009 UP Media Group, Inc. 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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No one, save for a few equipment suppliers, likes rework, but it's an ugly fact of life. At best, it is performed properly and costs only time and money. At worst, it results in a product that leaves the factory with a latent defect destined to fail in service. In between, all kinds of things can go wrong that result in more extensive repairs or even scrap.
There has always been an inherent risk to rework. Lifted pads, ripped barrels, torn traces--they all come with the territory. Pb-free ratchets up that risk a few notches, especially with plated through-hole components. Pb-free PTH rework provides numerous opportunities to ship product with hidden defects ...