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Subject:	Re: MiniBGA pad conflicts
From:	Bob Perkins <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Wed, 2 Feb 2000 11:57:34 -0800
Content-Type:	text/plain
Parts/Attachments:	text/plain (51 lines)

The square pads will give you better release of the paste, also the square
pads will help you see if the bga has reflowed properly when you x-ray them.

-----Original Message-----
From: Larry Jindra [mailto:[log in to unmask]]
Sent: February 2, 2000 10:34 AM
To: [log in to unmask]
Subject: [TN] MiniBGA pad conflicts

I'm a little confused.  J-STD-013 recommends 22 mil pads for 1.00mm pitch
BGAs, but the guideline for IPC7527 suggests 15 mil round pads with a square
paste opening.  Is anyone out there having good luck with one or the other?
Why the large disparity?

Thanks-

> Larry Jindra
> TRW/Avionics Systems Division
> mailto:[log in to unmask]   ph (858) 592-3424   fax (858) 592-3606
>

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