[SI-LIST] Re: Rectangular patterns on Toplayer.
- From: "Charles Grasso" <chasgrasso@xxxxxxxxxxx>
- To: cadpro2k@xxxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Wed, 03 Jul 2002 09:05:15 -0600
Hi Ismail,
This issue, I belive has benn throughly discussed previously
and you'll find it in the si-list archives.
Enjoy!!
>From: cadpro2k@xxxxxxxxxx
>Reply-To: cadpro2k@xxxxxxxxxx
>To: "si-list" <si-list@xxxxxxxxxxxxx>
>Subject: [SI-LIST] Re: Rectangular patterns on Toplayer.
>Date: Tue, 2 Jul 2002 08:50:53 -0800
>
>Hi Ismail,
>
>This is simply "added copper" to the outer board layers to ensure a
>consistant plating thickness across the surface of the boards. This is
>generally added by the fabrication house, without cost, to provide them
>better quality. Generally there is no problems associated with the
>practice, as long as the fab shop has guidance regarding how close to
>"features" they can get, but there are some times issues. This is
>definitely NOT a practice for RF designs.
>
>Good day.
>
>Mitch
>
>---------Included Message----------
> > Date: Tue, 02 Jul 2002 09:17:28 -0400
> > From: "Alex McPheeters" <amcpheeters@xxxxxxxx>
> > Reply-To: <amcpheeters@xxxxxxxx>
> > To: <ismailb@xxxxxxxxxxxxxxx>, "si-list" <si-list@xxxxxxxxxxxxx>
> > Subject: [SI-LIST] Re: Rectangular patterns on Toplayer.
> >
> >
> > I'm not going near this with a 10' pole!
> >
> >
> > At 06:26 PM 7/2/02 +0530, Ismail B - CTD, Chennai. wrote:
> > >
> > >Hello guys,
> > >
> > >I don't know whether this question has any relevance to signal
>integrity.
> > >But In some boards I see islands of copper (like rectangular
>patterns) on
> > >the top layer. I just wonder why this kind of pattern is used.
>Is it any
> > >thing to deal with EMI or what???
> > >
> > >Thanks a ton,
> > >Ismail
> > >
> > >
> >
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> >
> > Alex McPheeters
> > Vice President, Business Development
> > American Computer Development Inc.
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