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Questions and CommentsHave you got something to say? Visit any program page and use the Comment form at the bottom of the page to submit a comment or ask a question. Comments and questions are reviewed prior to posting. |
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Nov 22, 2024 How Do You Remove Oxidation from PCBs? One of the best ways to remove slight oxidation from HASL-finished bare PWBs and slightly tarnished immersion silver finished PWBs is to use a good-quality plasma cleaner. It can be used to not only remove ... Richard Stadem, Analog Technologies Corp. Nov 14, 2024 Big Problems with HASL Finish This problem was quite common in the late 90s. Electronic manufacturers were pushed to drive cost of boards down, so PCB with HASL finish was the preferred option over the ENIG (Electroless Nickel Immersion Gold). ... Les Watts, Testerion Nov 11, 2024 Shelf Life Before Conformal Coating There are a couple of standards that have requirements for drying boards prior to conformal coat. The J-STD-001 states "assemblies SHALL be treated to remove moisture" and the NASA-STD-8739.1B states "Following cleaning and prior to ... Alan Woodford, Zentech Nov 4, 2024 Reflow For Rigid Flex Depending on the overall thickness of the flex, bake times vary. I would recommend that you contact your board manufacturer for guidelines, as Polyimide is very hydroscopic. ... Philip H. Provencal, Jr., Columbia Tech Oct 11, 2024 Variations in SAC 305 Solder Curious, after dross recovery what phosphorus, at such a low % level would affect a selective solder system based on your comment of "equipment cant tolerate phosphorus", not to mention, what about a wave solder? ... Scott E. Fiske, Lockheed Martin Space |
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