Repairing Damaged Solder Mask

Repairing Damaged Solder Mask

Solder mask can be damaged by a number of things including but not limited to board handling, hand soldering, rework operations or burned devices or even the original board manufacturing process.

The damaged mask can be easily repaired by a skilled PCB repair technician following the guidelines of the IPC 7721 procedure.
The following TOOLS & MATERIALS are required for this repair: Brushes Cleaner Liquid Mask Foam Swabs UV Lamp Microscope Wipes
PROCEDURE:
1. Clean the area. Make sure the surfaces to be coated are cleaned prior to coating to ensure adequate adhesion, minimized corrosion, and optimized electrical properties.
2. If needed, apply Kapton tape to outline the area where the solder mask will be applied.
3. Apply the replacement mask to the board surface as required. A brush or foam swab may be used to apply and spread the epoxy or replacement coating.
4. Cure per the manufacturers' suggested guidelines with a UV spot curing system or by placing under a UV lamp
Call BEST if you need help with these or other repair procedures.