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June 2000

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Subject:
Re: BGA pads size
From:
Ryan Grant <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 29 Jun 2000 08:14:31 -0600
Content-Type:
text/plain
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text/plain (60 lines) 
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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