[SI-LIST] Re: Cross-hatched reference planes
- From: "Lee Ritchey" <leeritchey@xxxxxxxxxxxxx>
- To: "Christopher.Jakubiec@xxxxxxxxxxxx" <Christopher.Jakubiec@xxxxxxxxxxxx>, jseeger@xxxxxxxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Fri, 6 Apr 2007 10:05:19 -0700
Touche!
> [Original Message]
> From: <Christopher.Jakubiec@xxxxxxxxxxxx>
> To: <leeritchey@xxxxxxxxxxxxx>; <jseeger@xxxxxxxxxxxxxx>;
<si-list@xxxxxxxxxxxxx>
> Date: 4/6/2007 1:07:08 PM
> Subject: [SI-LIST] Re: Cross-hatched reference planes
>
> I think that the comment may have been made in good
> humor.................how about we say you were 'degassing' as opposed
> to venting.
>
> Chris Jakubiec
> =20
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of Lee Ritchey
> Sent: Friday, April 06, 2007 11:50 AM
> To: Jeff Seeger; si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Cross-hatched reference planes
>
> I think the venting that was mentioned in an earlier reply was from
> someone who thought my responses were venting frustration with a bad
> practice in PCBs. yes, it could be called venting, except for teh CAD
> departments who have to try to make Gerber files that include this type
> of plane structure.
>
> I don't know what the venting being discussed in this latest string of
> mail referes to.
>
> For those who saw my response as simple venting, I apologize. For all
> those engineers and designers who have been asked to create cross
> hatched planes, maybe this helped.
>
> For the record, the only fab shops I have seen ask for this in the last
> five years are located in Southeast Asia. Wonder why they do that?
>
> Lee Ritchey
>
>
> > [Original Message]
> > From: Jeff Seeger <jseeger@xxxxxxxxxxxxxx>
> > To: <si-list@xxxxxxxxxxxxx>
> > Date: 4/5/2007 12:35:30 PM
> > Subject: [SI-LIST] Re: Cross-hatched reference planes
> >
> > Andy wrote:
> >
> > > what is "venting"?
> >
> > In built-up multilayers, which start with a traditional core laminate,
>
> > subsequent dielectrics are applied in liquid or semi- liquid state. =20
> > Unbroken copper areas inhibit cure. Relief is in the form of "vent"=20
> > pads appearing as stray anti-pads, or as a cross-hatch shape.
> >
> > Sorry that carpal tunnel limits my replies. Or maybe that's a good=20
> > thing.
> >
> > Best regards,
> >
> > --
> >
> > Jeff Seeger Applied CAD Knowledge Inc
> > Chief Technical Officer Tyngsboro, MA 01879
> > jseeger "at" appliedcad "dot" com 978 649 9800
> >
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