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March 2004

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Subject:
From:
Tom Oliver <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 23 Mar 2004 11:59:22 -0500
Content-Type:
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Steve
Could you place the picture of the round pads on your site that you have
devoted to pics. When I mentioned the round pads to my group they wanted to
know more.
Thx's in advance
Tom Oliver
Eagle Comtronics
----- Original Message -----
From: "Steve Gregory" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, March 23, 2004 9:53 AM
Subject: Re: [TN] FW: Round SMT pads


> Au contraire, Monsieur!!
>
> I've seen round pads used numerous times! Mostly on 0402 footprints
> though...I suppose it wouldn't hurt on 0603 pads.
>
> The benefits are a reduction in tombstones, and increased space for
routing
> traces.
>
> I'll send you a picture of a board that I have here now that has round
pads
> (there's part of a dime in the picture for scale), but I've got more than
just
> a few boards that I build here that uses round pads, and from my
experience,
> it does help prevent tombstoning. I have less problems with tombstones on
>
> Hope this helps!
>
> -Steve Gregory-
>
>
>
> > I'll take the total lack of response to mean nobody has seen this.
> >
> > Thanks anyway.
> > Jason
> >
> > -----Original Message-----
> > From: Jason Lineback
> > Sent: Monday, March 22, 2004 10:37 AM
> > To: TechNet+AEA-IPC.ORG
> > Subject: +AFs-TN+AF0- Round SMT pads
> >
> >
> > Hello
> >
> > Is there a trend coming to use round pads for SMT components?
> >
> > I work for a contract manufacturer and within the last month we have
quoted
> > 2 assemblies from 2 different customers, both had round pads for 0603
> > components. Both customers outsourced their board design. We do not know
if both
> > customers used the same designer.
> >
> > We have not seen this before and have not found any information
supporting
> > this type of design. Anyone have any information on processing these?
> >
> > Thanks
> > Jason Lineback
> >
>
>
>
>
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