Michael
There is a process out of MCNC called PADS (plasma assisted dry soldering)
that can do the same. The negative is that they use a vacuum pre-treatment
system. I am aware of atmospheric systems as well. But there is some
hesitation, which I don't understand.
Carey
ps-Nice to hear from Aerojet. I had a chance to be your comrade many years
ago but chose a different path.
-----Original Message-----
From: Alderete, Michael <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Wednesday, January 05, 2000 1:16 PM
Subject: Re: [TN] cleaning flex circuits
>Hi all.
>
>Scientific Sealing Technology, in Downey CA, has been touting process and
>equipment for flux free attachment of solder balls, etc.
>
>Temporary web site has contact info...
>
>http://www.sst-tech.com/
>
>Michael Alderete
>Aerojet
>
>
>Brian wrote...
>------------------------------
>
>Date: Wed, 5 Jan 2000 13:23:01 +0200
>From: Brian Ellis <[log in to unmask]>
>Subject: Re: cleaning flex circuits
>
>Carey
>
>Such as?
>
>Brian
>
>Carey Pico wrote:
>
>> To all
>>
>> I've been keeping out of this discussion. But one thing I don't get...
>why
>> isn't the board industry looking at a fluxless process?
>>
>> Carey
>>
>> -----Original Message-----
>> From: Kelly M. Schriver <[log in to unmask]>
>> To: [log in to unmask] <[log in to unmask]>
>> Date: Tuesday, January 04, 2000 2:52 PM
>> Subject: Re: [TN] cleaning flex circuits
>>
>> >Hi Nancy -
>> >
>> >To begin with, the cleaning media is driven by the particular flux you
>are
>> >using. This, in turn, will drive the issue of what equipment you may be
>> >able to use for the process. I have had good success removing RMA
>residues
>> >from flex circuits with quite a number of blended solvents in vapor
>> >degreasers and conveyorized spray systems. Size of the flex assembly
>must
>> >obviously be considered - there are a number of suppliers who can
provide
>> >cleaning baskets to restrain small flexes for processing thru
>conveyorized
>> >cleaning systems. Manual cleaning would not be my first choice if I
were
>> >dealing with a high reliability article, particularly if it were to be
>> >conformal coated.
>> >
>> >Another possibility might be one of the saponifiers, in either a heated
>> bath
>> >or a "dishwasher" type system.
>> >
>> >If you are not currently using a low residue ("no clean") flux, might
>that
>> >be a possibility? If this is a consideration, and you plan to conformal
>> >coat or use adhesives on the assembly, be sure to verify full
>compatibility
>> >of the flux residues and the specific coating material you intend to use
>> >before proceeding.
>> >
>> >Contact me directly if I can be of assistance.
>> >
>> >Regards - Kelly
>> >
>> >
>> >
>> >
>> >-----Original Message-----
>> >From: Nancy M. H. Holloway <[log in to unmask]>
>> >To: [log in to unmask] <[log in to unmask]>
>> >Date: Tuesday, January 04, 2000 10:57 AM
>> >Subject: [TN] cleaning flex circuits
>
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