Yes, Joyce! There is always a danger of US damaging wirebonds and diebonds, but a lesser chance of that if the correct US cleaner made specifically for electronics is used. However, when you think about it, the cavitation physics would change radically with different viscosities of cleaning fluids, so that is one more thing that would have to be checked during qualification. The more coating stripping off into the solution, the more direct US energy is being applied, but at the same time less cavitation. Not sure just how that would work.
-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Joyce Koo
Sent: Wednesday, May 29, 2019 8:37 AM
To: [log in to unmask]
Subject: Re: [TN] Ultrasonics
I heard ultrasonic infused wood smoke flavour for enhance wine aging process. But no striping on PWA - worry about damage chip or wb.
Sent from my BlackBerry 10 smartphone.
Original Message
From: Stadem, Richard D
Sent: Wednesday, May 29, 2019 09:29
To: [log in to unmask]
Reply To: TechNet E-Mail Forum
Subject: Re: [TN] Ultrasonics
No, and it sounds very dangerous. US and volatile chemicals don't go together very well!
But like any other process involving volatiles, I imagine it can be done with the right equipment. The right equipment would NOT be an open US wash using 100% IPA, however. Those things lead to wholesale management/personnel changes and new company parking lots or swimming pools.
But the use of US energy to further drive a coating stripper does sound quite intriguing.
Odin
-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Douglas Pauls
Sent: Wednesday, May 29, 2019 7:55 AM
To: [log in to unmask]
Subject: [TN] Ultrasonics
Good morning all,
I had an odd question that came in recently about the use of ultrasonics to strip conformal coating? I have never heard of such. Does anyone have any experience with this?
*Douglas Pauls *| Principal Materials and Process Engr | Advanced Operations Engineering
*COLLINS AEROSPACE*
400 Collins Road NE, MS 108-101, Cedar Rapids, IA 52498 USA
*Tel:* +1 319 295 2109 | *Mobile: *+1 319 431 3773
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