Red Epoxy - The BGA guard

[lord]

How do you remove it? I talked to a couple of colleagues, and everybody has its own way.

I found my way pretty cheap and effective. I heat the board up so the epoxy is around 75°C and with a special sharp hook shaped tool and a pair of needle sharp tweezers a pick out the epoxy under the BGA, and i manage to remove it completely.

[mattbrad2]

Re: Red Epoxy - The BGA guard

Personally, I use a rework machine that heats it from underneath. At about 80C, I start to remove it with tweezers. By the time I'm done, the board is at about 120C and the stuff comes off like butter. I usually do this while pre-heating the board for chip removal so it's all in one step and I don't have to heat the board twice. Nothing worse than "thinking" you have it all removed, the go to lift the chip only to discover one blob still holding the chip down to the board.

[lord]

Re: Red Epoxy - The BGA guard

I heard there is some kind of fluid that resolves the epoxy. You leave if soaked for a couple od minutes and it easily comes off.

[mattbrad2]

Re: Red Epoxy - The BGA guard

The epoxy remover doesn't work as well. Don't waste your money.

[lord]

Re: Red Epoxy - The BGA guard

Did you meet the "black paste" on GPU in Apple PowerBooks? They had memory chips ontop the GPUs...
This stuff i just couldn't take down

[guruji]

Re: Red Epoxy - The BGA guard

Use any paint epoxy stripper or remover like bosny company apply some on the red paste make sure u keep away from your skin as this chemical burns a lot so be careful when usin it. Alternate use a wooden tootpick and blower to strip off the red epoxy.

[guruji]

Re: Red Epoxy - The BGA guard

Ohh when u use paint stripper you need to keep it for 30min or more and then the red paste become like soft and peels off like butter again watch your hand guys this sh....t is dangerous.

[lord]

Re: Red Epoxy - The BGA guard

Paint stripper is like a paint resolver/thinner?