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Subject:	.8mm bga, IPC class 3 design
From:	Frank A Bergmeister <[log in to unmask]>
Reply To:	(Designers Council Forum)
Date:	Mon, 11 Jul 2005 14:06:44 -0400
Content-Type:	text/plain
Parts/Attachments:	text/plain (23 lines)

I have a design that has a few .8mm bga's on it.  Everything I read says to
use a via with a .018 pad and .008 drill.  I never see what class the
boards are being built to.  My question is ... can PCB manufacturers make a
board with that via to class 3?  We have one manufacturer that wants the
pad .016 over what he drills (+.005 over our drill chart).

What vias are people using for class 3 designs?  Any board manufacturers on
the mailing list?

Any input is welcomed.

Thanks,
Frank

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