Electronics Forum | Fri Jun 07 11:31:11 EDT 2019 | teejsd
This does sound like my failure! Failure typically goes away when boards are removed from humidity. Yes we do have a HASL finish. Do I have to do the waterbath alcohol/water extraction to pull these contaminants, or is warm water/steam enough?
Electronics Forum | Fri Nov 18 12:09:37 EST 2022 | jauregui
Hello friends! Is there a method to remove cured soldermask? Area is localized, intent is to solder SMDs parts. Boards are populated. Typically, we use an exacto knife with some risk of course but these boards are pricy and it's alot that needs
Electronics Forum | Mon Nov 21 20:21:04 EST 2022 | emeto
You can try strip it with Chemically (like Acetone) or micro-blasting.
Electronics Forum | Tue Nov 22 02:38:30 EST 2022 | davef
What type of material is your solder mask?
Electronics Forum | Sat Mar 04 03:48:26 EST 2023 | researchmfg
We had sucessful removed the solder mask by laser machine and got good result and quality without damage the copper layer. You may refer to youtube here by https://youtu.be/cQHaE3_fiqw
Electronics Forum | Wed Nov 23 04:40:27 EST 2022 | micropak
I usually use a small engraving tool (handheld, battery powered). Works like a charm.
Electronics Forum | Wed Nov 23 22:18:50 EST 2022 | davef
If you have access to a laser for barcode marking you can perform multiple passes to burn the mask away.
Electronics Forum | Sat Jan 14 11:22:04 EST 2023 | proy
Hello - I have seen this work effectively with a diode laser. I recently purchased a CO2 laser which I am certain would work. 10-20w diode lasers (used for marking and engraving) would likely work. The resist burns away, but the copper then dissipate
Electronics Forum | Tue Nov 22 19:54:45 EST 2022 | davef
Every year, for the holidays, grannies come to the camera store to get their point & shoot cameras fixed. They've replaced the battery, but it still won't work. In the past, we used the eraser on the end of a No.2 pencil to buff the corrosion from th
Electronics Forum | Fri May 14 15:27:19 EDT 2004 | davef
Other methods [than scraping or grinding] for removing soldermask from a board are: * Chemicals * Microblasting
