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how to remove solder ball on PCB

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#56619

how to remove solder ball on PCB | 22 September, 2008

I have concern about cleaning solder ball after misprinting paste on PCB, currently use vigon 200 with ultrasonic generate but only 70% solder ball able to remove, Any other method or equipment can help to clean solder ball.

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#56628

how to remove solder ball on PCB | 22 September, 2008

While you're waiting for others to reply, search the fine SMTnet Archives for postings like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=30878

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#56639

how to remove solder ball on PCB | 23 September, 2008

Do not wipe the board at first before putting it in your cleaner. It will leave more paste in your tank, but you won't smear it into every corner of your solder resist.

We found that only our stencil cleaner would clean a board properly and leave no spheres behind. But again only if we did NOT wipe the board.

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#56649

how to remove solder ball on PCB | 23 September, 2008

In piggy back on Chunks' comments, what you might wipe it with can be the problem. Alcohol absorbed by the solder paste inhibits the effectiveness of some cleaning chemistries, and driving it into the nooks and crannies exacerbates the problem.

If you feel like you HAVE to remove some first to conserve your wash chemistry, use a plastic spatula and go easy.

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#56664

how to remove solder ball on PCB | 23 September, 2008

For additional information, download IPC-7526 - Stencil and Misprinted Board Cleaning Handbook http://www.ipc.org/html/IPC-7526.pdf

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#56700

how to remove solder ball on PCB | 25 September, 2008

strongly agree dont wipe at all, we make an air operated cleaner which blows the powder off while immersed in solvents to break up the flux. cheap and effective as long as you dont wipe first

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#56706

how to remove solder ball on PCB | 26 September, 2008

This sounds interesting. Could you explain?

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Solder Paste Inspection