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Chip On Board Manufacturing. The Black Blob on PCBs | by S Shyam | Shyam Cortex | Medium
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What are these dark spots around my PCB trace, and should I worry about them? I tried to remove them with 99% IPA and a brush, but they won't come off. :
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what causes the black corrosion /deposit on the pcb? | Electronics Forum (Circuits, Projects and Microcontrollers)
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Chip On Board Manufacturing. The Black Blob on PCBs | by S Shyam | Shyam Cortex | Medium
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