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Subject:	Re: Most common PCB failure modes
From:	Sara Gorcos <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Sara Gorcos <[log in to unmask]>
Date:	Wed, 18 Aug 2004 11:13:15 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (364 lines)
I posted a pdf of the fishbone document on my website if anyone needs to
download it - I'll just leave it there for today - you can find it on
the left hand side of my homepage.  For those of you interested in more
info on failure modes, you might look in our resources section and
download some of our case studies.
http://www.residues.com

Sara Gorcos



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Fineline Circuits,
Inc.
Sent: Wednesday, August 18, 2004 10:43 AM
To: [log in to unmask]
Subject: Re: [TN] Most common PCB failure modes

Ingemar:
May be Daan can put it on his website www.smtinfo.net. Looks like steve
in
not online. I would like a copy too.

Sona Sitapara
Fineline Circuits Inc.
[log in to unmask]


----- Original Message -----
From: "Ingemar Hernefjord (KC/EMW)" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, August 18, 2004 8:14 AM
Subject: Re: [TN] Most common PCB failure modes


> 1st:May I point out that the fishbone diagram is not my creation.
> 2nd: As so many want it (surprise! Do professionals like you need such
crib?), maybe Steve can put a copy on his homestead. Watt do u zink,
Steve?
>
> Ingemar
>
> PS. fishbones are excellent for teaching the mysteries of SMT, you get
a
knowledge platform, but they don't automatically guide you to the root
of a
specific Murphy day problem.
>
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Marvin Gaines
> Sent: den 18 augusti 2004 13:49
> To: [log in to unmask]
> Subject: Re: [TN] Most common PCB failure modes
>
>
> Kristopher,
>
> My experience in this matter is that PCB manufacturing companies
> have not had one common defect that can be detailed as a persistent
problem
> unless they
> have a process issue and then the defect should be able to be traced
to a
> date code).
> Usually there is a myriad of issue's that the public never knows
about.
> As with all manufacturing there are issue's that come up and make it
> ultimately to the end customer.
> So to pinpoint one common problem would be difficult.
>
>
> Ted Gaines
> Ht&D Cam Service
> 775-599-6720
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Graham Naisbitt
> Sent: Wednesday, August 18, 2004 7:11 AM
> To: [log in to unmask]
> Subject: Re: [TN] Most common PCB failure modes
>
>
> Hi Kristopher
>
> All our customers tell us they have zero defects and no failures.
>
> We call this "Telling Porky Pies".
>
> I did a net search on your question and came up with one that might be
> useful: http://www.allaboutcircuits.com/vol_5/chpt_8/5.html
>
> --
> Regards Graham Naisbitt
>
> [log in to unmask]
>
> Concoat Limited - Engineering Reliability in Electronics
> A British Manufacturer
>
> www.conformalcoating.com      www.concoat.co.uk
www.concoatsystems.com
>
> Golf Quote of the week: If you think its hard to meet new people, try
> picking up the wrong golf ball.
>
> Cell: 079 6858 2121
> Office: +44 (0)1252 813706
>
>
>
> > Hello,
> > Could some of you share what are the most common PCB defects that
escape
> to
> > your customers?
> >
> >
> > Thanks
> >
> > Kristopher J. Keating
> > Circuit-Wise, Inc.
> > 400 Sackett Point Rd.
> > North Haven, CT 06473
> > tel. (203) 281-6511 x 410
> > fax (203) 287-8409
> >
> > -----Original Message-----
> > From: TechNet [mailto:[log in to unmask]] On Behalf Of Ingemar
Hernefjord
> > (KC/EMW)
> > Sent: Tuesday, August 17, 2004 3:16 AM
> > To: [log in to unmask]
> > Subject: Re: [TN] thin film
> >
> > Seal Science say they have it all:
> > http://www.sealscience.com/html/products/VacuumCupsPdfs/15about.pdf
> > ultrahighvacuum guys use pure gold gaskets:
> > http://www.sisweb.com/catalog/F39.pdf
> > ourselves, we use as simple as butyl rubber:
> > http://www.allstategasket.com/materials.asp (not Ultravacuum, of
course)
> > Butyl rubber group includes ordinary rubber used in your
mountainbike
> tire,
> > can keep vacuum or pressure for very long time.
> > /Ingemar
> >
> >
> > -----Original Message-----
> > From: TechNet [mailto:[log in to unmask]]On Behalf Of Crepeau, Phil
> > Sent: den 17 augusti 2004 02:25
> > To: [log in to unmask]
> > Subject: Re: [TN] thin film
> >
> >
> > hi,
> >
> > i believe you should be able to use a gasket material such as viton.
> >
> > phil
> >
> > -----Original Message-----
> > From: TechNet [mailto:[log in to unmask]]On Behalf Of Douglas O. Pauls
> > Sent: Monday, August 16, 2004 2:02 PM
> > To: [log in to unmask]
> > Subject: [TN] thin film
> >
> >
> > Good day all,
> > I am in need of a recommendation for a thin film sealant material.
I
need
> > it to be 15-20 mils thick, cuttable, and preferrably non silicone.
We
> have
> > considered the Sil-Pad technology, but as this will be used in a
vacuum
> seal
> > operation, I am concerned about silicone outgassing or cross
> contamination.
> > Are there any thin gasket materials from the engineered rubbers that
> anyone
> > would recommend?
> >
> > Doug Pauls
> >
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