Howard
And what about the contamination on the components? In my experience,
this is often, by far, worse than that on the boards.
Brian
Howard Watson wrote:
>
> Graham,
>
> We don't demonstrate our end product reliability. What we do, per the
> consultants advice, is to:
>
> 1. Ensure that the no-clean flux we use passes Bellcore
> specifications.
> 2. Use the Ionograph and electromigration tests to determine bare
> board cleanliness, and work with our suppliers to ensure the
> boards are clean (to our specs).
> 3. Use Certificates of Compliance as the conforming document for
> solder, solder paste, and flux. Occasionally challenge the C of
> C's.
> 4. Monitor and control our processes, to ensure that variation is
> reduced.
>
> Basically, the process controls we have in place, I am told, will
> satisfy our customer (so far, so good). If our customer requires
> demonstration of end product reliability, then we will proceed
> down that path.
>
> Howard Watson
>
> "Graham Naisbitt"
> <[log in to unmask]> To: "TechNet
> E-Mail Forum."
> 02/21/01 09:48 AM <[log in to unmask]>,
> <[log in to unmask]>
> cc:
> Subject: RE:
> [TN] Washing of no-clean
>
> Howard,
>
> It would be interesting to understand how you demonstrate your
> end product reliability.
>
>
> Regards, Graham Naisbitt
>
> [log in to unmask]
> www.concoat.co.uk
>
> Concoat Limited
> Alasan House, Albany Park
> CAMBERLEY GU16 7PH UK
> Phone: +44 (0)1276 691100
> Fax: +44 (0)1276 691227
> Mobile: +44 (0)79 6858 2121
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Howard Watson
> Sent: Tuesday, February 20, 2001 08:27
> To: [log in to unmask]
> Subject: Re: [TN] Washing of no-clean
>
> You guys are right on target here. We have a major customer who
> is world leader in the heavy vehicle industry, and they were (and
> I think still are) very skeptical of our no-clean process (we
> also use Multicore paste). We have taken great strides to
> convince the customer that the no-clean process meets all
> industry specifications, and we have set up process controls to
> prove it. We hired a very high ranking consultant to set us on
> the right track with our customer. The consultant strongly
> advises against cleaning the "no-clean" flux. The alternative,
> to do the job correctly, would have been a $250,000 investment
> for a cleaning system.
>
> Howard Watson
>
> Lou Hart <[log in to unmask]>
> Sent by: TechNet <[log in to unmask]> To:
> [log in to unmask]
> 02/20/01 09:09 AM cc:
> Please respond to "TechNet E-Mail Subject: Re:
> Forum."; Please respond to Lou Hart [TN] Washing of no-clean
>
> I was hoping someone would say what Brian has here, on behalf of
> manufacturers. If you want something more than conformance to
> our
> standard, 610 class 2 product, tell us you want it up front and
> be prepared
> to pay for it. This business is not a philanthropic enterprise.
> It may be
> advisable to give some free advice in this area, however, by
> telling the
> customer he may be wasting his money.
> Lou Hart
> -----Original Message-----
> From: Brian Ellis [SMTP:[log in to unmask]]
> Sent: Tuesday, February 20, 2001 9:21 AM
> To: [log in to unmask]
> Subject: Re: [TN] Washing of no-clean
>
> Ioan
>
> Well, if they want it clean, they will have to pay for it,
> n'est-ce-pas?
> If they don't want to pay, the corollary is that they should put
> up with
> the minimal residues from a good low-solids, "no-clean"
> flux/paste.
>
> If you buy a car and want to enhance its appearance with
> "speed-stripes"
> or a spoiler, do you think your supplier will do it for free?
>
> Brian
>
> "Tempea, Ioan" wrote:
> >
> > Sorry for the missing details.
> >
> > The product is regular office equipment, so not a demanding
> one. The
> request
> > for cleanliness is purely aesthetical.
> >
> > By the way, no premium involved. They want it clean and that's
> it.
> >
> > Regards,
> > Ioan
> >
> > > -----Original Message-----
> > > From: Brian Ellis [SMTP:[log in to unmask]]
> > > Sent: Tuesday, February 20, 2001 2:31 AM
> > > To: TechNet E-Mail Forum.; Tempea, Ioan
> > > Subject: Re: [TN] Washing of no-clean
> > >
> > > Ioan
> > >
> > > Whoa! Be careful here. If your clients are wanting cleaning,
> there is a
> > > reason why they are willing to pay a premium. What is it? If
> it is
> > > purely for aesthetics, then no great deal. If it is for
> technical
> > > reasons, what degree of cleanliness is required? What is the
> end-use
> > > application? If it is critical, then you must do the job
> properly and
> it
> > > would be unlikely a bench-top system would give adequate
> results, at
> > > least without multiple stages and excellent process control.
> > >
> > > Please let us know more.
> > >
> > > Brian
> > >
> > > "Tempea, Ioan" wrote:
> > > >
> > > > Hi technos,
> > > >
> > > > I need your expertise again.
> > > >
> > > > We are on no-clean and newer clients ask us to clean the
> residue. I
> need
> > > to
> > > > know if any equipment exists to do this job, except for the
> big
> washers.
> > > I'm
> > > > thinking of a small (table top) tank, followed by some
> drying thing.
> > > > Then, is the simple dipping of the board enough to wash
> away the
> > > residue, or
> > > > some agitating action is needed?
> > > >
> > > > We are on X33 flux from Multicore and I think I can get
> from them the
> > > right
> > > > substance that would do the cleaning. However, if you
> happen to have
> > > > suggestions...
> > > >
> > > > Thank you,
> > > > Ioan
> > > >
> > > >
> > >
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