Parylene’s benefits as a conformal coating are well known. It resists heat, cold, moisture, and pressure; salt spray, electricity, and solvents can’t permeate it. And while these attributes of parylene contribute to the conformal coating’s appeal, they also present distinct challenges, particularly in regards to parylene removal, rework, and repair.
The quality of a conformal coating job is directly related to the cleanliness of the substrate that is being coated. Clean substrates coat well, and contaminated ones don’t. The only way to manage the problem is to inspect and clean the board or other item before applying the coating — once it’s coated, it’s essentially […]
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Coverage in Undesired Areas
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