[SI-LIST] Re: Cross-hatched reference planes

  • From: Jeff Seeger <jseeger@xxxxxxxxxxxxxx>
  • To: si-list@xxxxxxxxxxxxx
  • Date: Thu, 05 Apr 2007 14:46:04 -0400

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.  Unbroken copper areas inhibit cure.  Relief is
in the form of "vent" 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 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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