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Removing soldermask from populated boards (PCBAs)

Removing soldermask from populated boards (PCBAs)

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Hello friends! Is there a method to remove cured soldermas... - Nov 18, 2022 by Edward Jauregui

You can try strip it with Chemically (like Acetone) or micro... - Nov 21, 2022 by Evtimov

What type of material is your solder mask? ... - Nov 22, 2022 by davef

Every year, for the holidays, grannies come to the camera st... - Nov 22, 2022 by davef

I usually use a small engraving tool (handheld, battery powe... - Nov 23, 2022 by Micropak

If you have access to a laser for barcode marking you can pe... - Nov 23, 2022 by davef

Hello - I have seen this work effectively with a diode laser... - Jan 14, 2023 by PRoy

We had sucessful removed the solder mask by laser machine an... - Mar 04, 2023 by researchmfg

Edward Jauregui

#88647

Removing soldermask from populated boards (PCBAs) | 18 November, 2022

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 to be reworked not just a few.

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Evtimov

#88650

Removing soldermask from populated boards (PCBAs) | 21 November, 2022

You can try strip it with Chemically (like Acetone) or micro-blasting.

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davef

#88652

Removing soldermask from populated boards (PCBAs) | 22 November, 2022

What type of material is your solder mask?

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davef

#88653

Removing soldermask from populated boards (PCBAs) | 22 November, 2022

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 the battery terminal, but who has No.2 pencils anymore? So, in support of grannies everywhere, we started using "fiberglass brush pencils" instead.

I just tried using one on some solder mask of undetermined composition, probably epoxy. It worked!!! Easy to control, no mess or masking.

Order the pencils online.

I'm going to bushfix a pencil to a Dremel Tool.

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Micropak

#88654

Removing soldermask from populated boards (PCBAs) | 23 November, 2022

I usually use a small engraving tool (handheld, battery powered). Works like a charm.

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davef

#88658

Removing soldermask from populated boards (PCBAs) | 23 November, 2022

If you have access to a laser for barcode marking you can perform multiple passes to burn the mask away.

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PRoy

#88842

Removing soldermask from populated boards (PCBAs) | 14 January, 2023

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 dissipates the laser heat and does not get anywhere near melting

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researchmfg

#89022

Removing soldermask from populated boards (PCBAs) | 4 March, 2023

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

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