Flexible Thinking: Rules of Thumb—A Word to the Wise
Happy’s Tech Talk #29: Bend-to-Install Semi-flex FR-4
Connect the Dots: Five Best Practices for Designing Flex and Rigid-flex PCBs
Estimated reading time: Less than a minute
Trouble in Your Tank: Those Problematic Soldermask Issues
I am sure you have heard the words, “It’s not rocket science.” Apologies to the rocket scientists. Sometimes PCB fabrication just makes it look that way. This month’s Trouble in Your Tank approaches the subject of soldermask adhesion using an actual case study. As the reader will note, I recommend using sound troubleshooting methodology to zero in on the root cause of the problem.
Problem Statement
A medium-sized U.S.-based PCB fabricator had started to experience adhesion failures of liquid photoimageable soldermask on select part numbers. The company utilizes a double-sided screen printing machine to apply the solder mask.
The fabricator claims that “nothing has changed” (I love that one). Read the full column here.
Editor's Note: This column originally appeared in the January 2013 issue of The PCB Magazine.
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