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June 2000

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Subject:
From:
Ryan Grant <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 29 Jun 2000 11:14:40 -0600
Content-Type:
text/plain
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text/plain (109 lines)
nice site Bill.

> -----Original Message-----
> From: Brooks Bill [SMTP:[log in to unmask]]
> Sent: Thursday, June 29, 2000 9:26 AM
> To:   'TechNet E-Mail Forum.'; Ryan Grant
> Subject:      RE: [TN] BGA pads size
>
> I have put together a little website to gather together some PCB Designer
> reference materials for Designers... in there under 'programs and
> calculators' I have a link to a site that has Ball Grid array layout
> information that you might find useful... it's a document that Motorola
> put
> out on the web...
> http://home.fda.net/bbrooks/pca/pca.htm
>
> here's a direct link to the Motorola page -
> http://www.mot-sps.com/solutions/wired/pbga/layout.html#geometry
>
> - Bill Brooks
>
>
> -----Original Message-----
> From: Ryan Grant [mailto:[log in to unmask]]
> Sent: Thursday, June 29, 2000 7:15 AM
> To: [log in to unmask]
> Subject: Re: [TN] BGA pads size
>
>
> Stella,
>         PCB pad sizes should match the CSP pad size.  If you can't find
> that
> out from the component manufacture, a good rule of thumb is to use pads
> that
> are 80% of the size of the ball.
>
> Thanks
>
> Ryan Grant
> Advanced Technology Engineer
> MCMS
> (208) 898-1145
> [log in to unmask]
>
>
> > -----Original Message-----
> > From: Stella Neyman [SMTP:[log in to unmask]]
> > Sent: Wednesday, June 28, 2000 12:08 PM
> > To:   [log in to unmask]
> > Subject:      [TN] BGA pads size
> >
> > Technetts,
> > Please help.
> > I have to do the PCB layout for 8mm x 8 mm BGA. 108 Balls size of 0.3
> mm,
> > spacing is 0.5 mm.
> > Could somebody advise what would be the pads size? What is would be vias
> > diameter?
> > Please advise.
> > Thank you,
> > Stella
> >
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