If you are moving to an aqueous or semi-aqueous system for the first time,
you must pay attention to your design to avoid potential capillary traps:
sleeved leads, component clearances, some connector types and so on can
mechanically attract water into them which is difficult to impossible to get
back out, Also do not neglect drying, most people concentrate on the
cleaning part of the process and relegate drying part to also ran, it can be
significant portion of budget. Generally blow off is better than dry off for
water, but you will probably need both.
Regards
Mike Fenner
Indium Corporation
T: + 44 1908 580 400
M: + 44 7810 526 317
F: + 44 1908 580 411
E: [log in to unmask]
W: www.indium.com
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Indium Corporation
Incorporated in New York, USA
Registered office: (Not for correspondence)
77-97 Harpur Street, Bedford , UK
Registered number: fc16473
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas O. Pauls
Sent: Wednesday, August 20, 2008 5:12 PM
To: [log in to unmask]
Subject: Re: [TN] PWA cleaning methods
Darn, Richard beat me to it. In addition to matching the cleaning solution
to the soils to be cleaned, you also need to consider the kind of cleaning
equipment. The dynamics of the machine can make as much of a difference as
the cleaning chemistry.
You should probably come to the IPC/SMTA Cleaning Symposium in Chicago in
October. Become an expert in the topic in two days.
Doug Pauls
"Stadem, Richard D." <[log in to unmask]> Sent by: TechNet
<[log in to unmask]>
08/20/2008 11:02 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to "Stadem, Richard
D." <[log in to unmask]>
To
[log in to unmask]
cc
Subject
Re: [TN] PWA cleaning methods
The cleaning method is tailored to the flux type of the solder paste and
wire solder and wave solder you are using. If you are looking for the
safest method of cleaning, then I would go with deionized water at
145-150 deg. F. and a good water soluble flux process. It depends.....
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of William D. Mengers
Sent: Wednesday, August 20, 2008 10:13 AM
To: [log in to unmask]
Subject: [TN] PWA cleaning methods
Can anyone tell me what the latest and greatest "safe-to-the-hardware"
PWA cleaning methods and solvents there are these days. One of my
co-workers has been tasked with buying a new cleaning system for PWA's.
Any information will be appreciated.
Thank you,
Bill
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