Electronics Forum: freon substitute (Page 1 of 1)

Re: White layer appearance on PCB

Electronics Forum | Sun Jan 31 22:55:33 EST 1999 | Dennis O'Donnell

| | Hello Netters, | | | | I need some info, Earl or Dave, I have a PCB that exhibits a white layer on solder side. It does not appear to be surface residues (IPA has no effect), but looks like its under solder mask. My first guess is that the LPI

Re: White layer appearance on PCB

Electronics Forum | Wed Feb 03 04:44:43 EST 1999 | Jeff Sanchez

| | | Hello Netters, | | | | | | I need some info, Earl or Dave, I have a PCB that exhibits a white layer on solder side. It does not appear to be surface residues (IPA has no effect), but looks like its under solder mask. My first guess is that t

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