[PEDA] Internal plane problems
Sirs, I have noticed a problem when I route a multilayer board with an internal power plane split up into different sections in 99SE. When I setup an internal plane then add split planes to it the auto router doesn't seem to check if the via it placed into the board is actually going into the plane. It seems like if the via is in the pcb the router considers its job done and I have to find out when I run the DRC that it didn't connect to the plane it was supposed to. It feels like one of those problems where I am missing something simple. What would that simple thing be? :) Afshin Salehi DPS Telecom * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] Internal plane problems
Afshin,
Addition of the secondary planes has to be done in a certain way,
or Protel has trouble allocating the plane areas. To add secondary
Split Planes, it's necesary to create holes on the Primary Plane
by editing its vertices (ie, by doing Edit Move Polygon Vertices,
selecting the polygon, then dragging the handle {a small cross in the
middle of a side of the plane polygon} to a new location). Continue
until sufficient space is created for the new Split Plane, and add the new
plane. Though the edges of the Split Planes can coincide, be sure not to
overlap copper areas of the various planes.
Also note that the Primary Plane must not be closed, or completely
enclosing any Secondary Plane. You must break the margin of the
Primary Plane toward the edge of the board to create a gap in the
Primary Plane for each Secondary Plane. Protel's Help system has an
example, I believe. Check Plane current density and signal layer paths to
determine the best place to create these gaps.
These are supposed to be hard and fast rules, but I've had boards that
checked and ran OK even with small embedded Split Planes. But the
procedure should be followed, since DRC results and plane connection
assignment is unpredictable if it's not.
I'm sure others have more tips.
Brian
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Re: [PEDA] Internal plane problems
The instruction below is not correct. A primary or outer plane CAN completely enclose any number of secondary planes, it is secondary planes that must not enclose any other secondary planes. The example diagram in the manual is a little misleading in that it doesn't specifically show the outermost plane. Read the caption carefully. (P.571 in 99 manual) Dave Sanders -Original Message- From: Brian Sherer [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 11, 2002 6:28 AM To: Protel EDA Forum Subject: Re: [PEDA] Internal plane problems snip Also note that the Primary Plane must not be closed, or completely enclosing any Secondary Plane. You must break the margin of the Primary Plane toward the edge of the board to create a gap in the Primary Plane for each Secondary Plane. Protel's Help system has an example, I believe. Check Plane current density and signal layer paths to determine the best place to create these gaps. snip Brian * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] Internal plane problems
Thanks, Dave... Brian * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
