Doug was able to jog my memory and I was able to locate some associated
information:
        - The Effects of Ultrasonic Cleaning on Device Degradation by B.P.
Richards, P. Burton and P.K. Footner (GEC Hirst Research Centre, Wembley,
Middlesex, England) published in Circuit World Volume 16, Number 3, 1990
        - Update to the above published in Circuit World Volume 17, Number
4, 1991
        - IPC-TP-933 (October 1990) referenced in above
        - IPC-TP-855 (April 1990) referenced in above

Hope this helps.

Steve Sauer
Northrop Grumman, Xetron

-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Tuesday, November 12, 2002 9:32 AM
To: [log in to unmask]
Subject: Re: [TN] Ultrasonics cleaning


Lino.
To answer Brian's question, the string is 8.3 cm long.  Have it right here
in front of me.

Brian's listing of parameters is a good one for consideration.  I suggest
that you contact the National Physical Laboratory (NPL) in the UK.  In the
late 80s or early 90s, they did an extensive amount of research on what
frequencies and power levels could be used for ultrasonic cleaning.  I
think it was done by Dr. Colin Lea or by Peter Foote.  Dr. Chris Hunt or
Alan Brewin may be able to guide you to the test reports generated.  Those
reports were used to convince some of the more stubborn military types that
ultrasonic cleaning could be used safely.  Try http://www.npl.co.uk/.

Doug Pauls
Advanced Operations Engineering
Rockwell Collins

---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------