I can't compete with Dewey's wisdom and axioms. So, I have to apply to
simpler rules. When I'm cooking, let's say making breakfast porridge or
making a chocolate colored thick spicy aromatic winy sauce for the coc
au vin, I use to clean the pans as soon as possible. Likewise, my advice
for flux residue cleaning is: ASAP !!!
Inge
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey
(EHCOE)
Sent: den 29 oktober 2007 18:26
To: [log in to unmask]
Subject: Re: [TN] cleaning concerns
That's a week answer. The real answer will cost me another royalty
donation to the Doug Paul's Defense Fund for Battered Chickens, but it
depends. The range of time could be from ASAP (a maximum one hour) to
eternity (meaning never). Some of the things to consider are as follows:
* Laminate
* Final surface finish
* Solder Mask
* Spacing
* Component orientation
* Assembly surface topography
* Material compatibilities
* Cleaning chemistries
* Solvency capabilities
* Flux chemistries
* Cleaning process residuals and their chemical make-up
* Thermal excursion exposures during processing
* Cleanliness requirements
* Conformal coating or not
* Testing requirements
* End use environment
* Warranty issues
* Cost
Dewey
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Linda Langley
Sent: Tuesday, October 23, 2007 11:40 AM
To: [log in to unmask]
Subject: [TN] cleaning concerns
Can anyone tell me or direct me to documentation that specify how long
flux residue from WS609 63/37 can be left on a board before washing?
I was informed that it could be left on for 7 days .
Linda Langley
Jabil Circuit
Training Specialist
(248) 292-6176
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