Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Removing carbon finish from pcbs

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#77682

Removing carbon finish from pcbs | 6 June, 2017

Hi im new to the forum. We have product where we have applied a carbon finish. I want to remove the carbon to reapply but cant seem to find a solution. Its baked onto solder mask. Any ideas? I was hoping something non abrasive to save scratching the solder mask, maybe a solvent or chemical.

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#77685

Removing carbon finish from pcbs | 6 June, 2017

I'd be surprised if you find a non-destructive method of removing carbon ink. Your best bet is following the recommendations of your ink supplier.

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#77690

Removing carbon finish from pcbs | 8 June, 2017

Carbon ins has very strong resistance to acid and alkali, not easy to remove, maybe return your boards to PCB supplier? they may have solution.

Robert Peng- SysPCB

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#77694

Removing carbon finish from pcbs | 8 June, 2017

By the way that you stated your question, I assume that you want to do something different with the carbon inked pads. If that's incorrect, instead of removing your carbon ink, considering printing an insulating layer over the ink.

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