Clean bga with ultrasonic

[jasko_jacker]

Hi all, I read that in some cases to clear bga with a non ultra expensive (permit to change the frequency ) ultrasonic wash can damage the chip.
Some experience....
thanks

[ktmmotocross]

Re: Clean bga with ultrasonic

i clean hundreds mobile phone boards with ultrasonic bath with no damage.
every good technician doing this after liquid damage.

[jasko_jacker]

Re: Clean bga with ultrasonic

I use the same method with no problem, but I assume that the article I read, referred about an issue of separation between the die and the golden thread. It's possible?
How liquid you use ? I try some liquid and various temperature but I have the best result , especially to remove the flux after a reballing, with a isopropil alcool at 60-70 C° or for particular cases an ersa solvent. with distilled water, the results are poor as well as with specific liquids, probably for the frequency, my bath operates at 44 Khz but I read of devices operating at much higher frequencies.

[ktmmotocross]

Re: Clean bga with ultrasonic

i dont using utrasonic bath after reball. only for removing oxidation after liquid damage under the bga.

[diif]

Re: Clean bga with ultrasonic

The only damage i have read about is if the chip touches the inside of the bath, which can cause physical damage to the chip and also the bath. The chip/item should be in a try or suspended.
I use IPA in my bath but i don't clean BGA chips in mine.

[Ramee]

Re: Clean bga with ultrasonic

Agreed to diif. They are not ESD safe.

[ktmmotocross]

Re: Clean bga with ultrasonic

Agreed to diif. They are not ESD safe.

ofcourse thats why all using some kind of nonmetal "carpet" on bottom of ultrasonicbath

[jasko_jacker]

Re: Clean bga with ultrasonic

I find the article, can I post the full link ?
http://www.xxxxxxx.org/mart/50226F.shtml

[trebo]

Re: Clean bga with ultrasonic

all I get is this,
(Controller file /home/orgclini/public_html/xxxxxxx.org/libs/controller/mart.php not found.)
Is it just me again

[vinceroger69]

Re: Clean bga with ultrasonic

maybe he meant this link
http://www.ipcoutlook.org/mart/50226F.shtml

[jasko_jacker]

Re: Clean bga with ultrasonic

I am a newbie to this forum and not know the policy to post a link.
the right link is http://www.ipcoutlook.org/mart/50226F.shtml

[Bobdee]

Re: Clean bga with ultrasonic

thanks
Cheers jasko

[reaper57]

Re: Clean bga with ultrasonic

An ulrasonic bath shouldn't damage the bga. I've done not only phones, but also CPUs, tablets, laptop motherboards and other PCBs. The weirdest thing that I have fixed with an ultrasonic bath was an iPad camera. Isopropyl alcohol didn't work, but after the bath it worked like new.

[Joseph cauchi]

Re: Clean bga with ultrasonic

Can somebodt tell me what liquid mix to use in ultrasonic for mobile and BGA

[Th3_uN1Qu3]

Re: Clean bga with ultrasonic

I did not know an ultrasonic cleaner is not ESD safe - i removed the plastic tray from mine when i got it, and forgot where i've put it. I've cleaned lots of BGAs in it and it didn't damage any of them. But i always put the BGAs in with the pads facing up.