Bob,

Your answer says "square pad".  Do you mean square pad or paste stencil??
The question indicated square paste.

I guess either way might work on xray;  sq pad/round paste or sq.
paste/round pad.
I haven't seen the square pad or paste on an xray, but it is an interesting
method.

Please clarify.

Tks........DT


At 11:57 AM 2/2/00 -0800, you wrote:
>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
> >
>
>##############################################################
>TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
>##############################################################
>To subscribe/unsubscribe, send a message to [log in to unmask] with following
>text in
>the body:
>To subscribe:   SUBSCRIBE TECHNET <your full name>
>To unsubscribe:   SIGNOFF TECHNET
>##############################################################
>Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
>information.
>If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
>847-509-9700 ext.5365
>##############################################################
>
>##############################################################
>TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
>##############################################################
>To subscribe/unsubscribe, send a message to [log in to unmask] with
>following text in
>the body:
>To subscribe:   SUBSCRIBE TECHNET <your full name>
>To unsubscribe:   SIGNOFF TECHNET
>##############################################################
>Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
>information.
>If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
>847-509-9700 ext.5365
>##############################################################

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################