Cleaning PCB board after soldering

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#1
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Hi!

I have a question to those, who solder their own PCB board on their own:
After soldering there are brownish solder flux residues left on the PCB board, which doesn't look pretty. One of my friends told me to dip the hole board into a bowl full of isopropyl alcohol, and leave there for a while, so these flux residues get dissolved.

My question is: are the IC-s water, or isopropyl alcohol resistant? I mean can I put a common DIP or TQFP AVR into a bowl full of isopropyl alcohol?

If not, then what do you suggest to clean the board?

Thanks for your answers.

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IPA is generally used for cleaning PCBs. You need the 99% stuff, with a stiff brush.

Leon Heller G1HSM

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So generally IC-s are fluid-proof, so no IPA (or other fluid) can get into the packege (DIP, SOIC, TQFP, etc.)?

But for example you wouldn't put a small electret microphone into IPA, would you?

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I had the same problem only a couple weeks ago. Check here.

https://www.avrfreaks.net/index.p...

I followed nleahcim's method since 99% IPA usually needs to be ordered online. It works pretty well.

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lammelm wrote:
But for example you wouldn't put a small electret microphone into IPA, would you?

You can always try it. I had a piezoelectric speaker that said not to get wet and it still works fine after soaking. The IPA evaporates so fast.

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Thanks for the link.