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June 2004

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Subject:
From:
Cal Driscoll <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 17 Jun 2004 11:40:24 -0400
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Hello All-
Recently I was away on Holiday and when I came back....there was a Branson
Utlrasonics system being used to clean our newly assembled PCB's. The
machine is a standard ultrasonics (parts cleaner I call it) bath using a
general cleaner/degreaser.

Facts:
Our process is:
- No clean
- double sided
- mix technology
- Discrete (tants, Chips resistors)
- BGA's
- QFPs
- PLCC's
- ASICS
- Connectors
- Headers
- Electrolytic Caps

Concerns:
- Ultrsonics damaging internals on IC's
- Residues left after cleaning
- Effects on Programmable IC's
- .....Just General over all reliability.


I have huge concerns on the over all cleanliness and reliability. Any info
supporting or declining this is of interest.

Thanks in advance,

Cal

Caldon Driscoll
Program Manager, Circuit Board Manufacturing
CTDI
1373 Enterprise Drive
West Chester, PA 19380
610-793-8098
WWW.CTDI.COM

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