I am still waiting for the person to get arrested for fixing the BOM
while waiting to get on a plane
-----Original Message-----
From: Ian Hanna [mailto:[log in to unmask]]
Sent: Monday, September 10, 2007 12:23 PM
Subject: Re: Help needed on motherboard failure analysis-Update
Reminds me of the time I tried a web-search when looking for vibrators
for my copper plating lines...
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gary Crowell
Sent: Monday, September 10, 2007 12:07 PM
To: [log in to unmask]
Subject: Re: [TN] Help needed on motherboard failure analysis-Update
My company, in their infinite wisdom, has picasaweb blocked. Apparently
other types of photos are shared there as well.
Gary Crowell
Micron Technology
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
> Sent: Monday, September 10, 2007 8:46 AM
> To: [log in to unmask]
> Subject: Re: [TN] Help needed on motherboard failure analysis-Update
>
> Hi Gil!
>
> Looks like you found a way to share your photos. Picasa is a pretty
> neat way of doing that and it's free!
>
> I created my web page before there was something like Picasa out there
> so that if a Technetter wanted to share a photo with the list, they
> could do that.
>
> But now it looks like the need for my page is going to be obsolete
> now... (:^(
>
> Thanks Google! (just kidding)
>
> But, if you ever want a picture posted on my page, you just need to
> email them to me and I'll post them.
>
> Steve
>
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Zilber Gil
> Sent: Monday, September 10, 2007 10:12 AM
> To: [log in to unmask]
> Subject: [TN] Help needed on motherboard failure analysis-Update
>
> Hello Technet and thanks to all for your help.
> Below is a links to some photos (How could I upload photos to Steve's
> site?).
> The board contains only connectors to which other modules are
> connected (no passive or active components). The board is FR4 with 28
> layers.
> There are Ground holes with retaining screws (and its looks like it
> connected to the failure). Their was a protective fuse that blow after
> the failure.
> I am checking the modules that were attached to the board. No sign to
> failure, yet.
> A month before the failure a cooling liquid (ethylene glycol) was
> spilt on the board and did not cleaned up (just drying it). I am doing
> analysis on residues found on the screwing (but it could be Loctite).
> I will keep you update on the finding (cross section, x-ray, etc.).
>
> Regards,
>
> Gil
>
> http://picasaweb.google.co.uk/gil.zilber/Board
>
> -
>
> ----- Original Message -----
> From: "Zilber Gil" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, September 04, 2007 1:25 PM
> Subject: [TN] Help needed on motherboard failure analysis
>
>
> > Hi,
> >
> > Recently one of our motherboard failed. It reaches very high
> temperature
> > that melts the copper and explodes shooting (from the side of the
> board)
> > the melt copper to over 20 cm. the shooting hole cause
> delamination of
>
> > the board in the area. A lot of black smoke and was also
> seen. The max
>
> > voltage of the board is about 50V. The board worked fine
> for more then
> a
> > year. What could be the failure mechanism? Could it be due to
> conductive
> > filament formation (although the PCB should be free of that)?
> >
> > Thanks
> >
> > Gil Zilber
> > Elta Systems
> >
> > The information contained in this communication is proprietary to
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> >
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