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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