Dan, Would you please point out what kinds of EMI headaches this would cause?
Thanks, Abbas At 12:32 PM 1/18/01 -0500, Roman, Dan wrote: > >Remember that you can also cause yourself all kinds of EMI headaches if you >have electrically floating copper areas or patterns on the board. It has >lead to many arguments with the CAD department over the years! > >-- Dan > >-----Original Message----- >From: Stephen Phillips [mailto:step...@cisco.com] >Sent: Thursday, January 18, 2001 9:33 AM >To: rehel...@mmm.com; emc-p...@majordomo.ieee.org >Subject: Re: Copper Thieving > > > > Copper applied to the outer PCB layers, in a pattern, >to even out the copper placement so the board is less >likely to warp through soldering. Obviously, it would >be put where there is not etch, large open areas, to >somewhat offset where you might have planes of >copper elsewhere on the layer. > > Beware of Creepage and Clearance violations >(if applicable). Some PCB fab. houses have >carte-blanche to add this, we don't allow that - >and control it as part of our own PCB CAD >instead. > > Best regards, > Stephen > >At 09:15 AM 1/18/01 Thursday , rehel...@mmm.com wrote: >> >>Please excuse my lack of knowledge..........................what is "copper >>thieving"? >> >> >>------------------------------------------- >>This message is from the IEEE EMC Society Product Safety >>Technical Committee emc-pstc discussion list. >> >>To cancel your subscription, send mail to: >> majord...@ieee.org >>with the single line: >> unsubscribe emc-pstc >> >>For help, send mail to the list administrators: >> Jim Bacher: jim_bac...@mail.monarch.com >> Michael Garretson: pstc_ad...@garretson.org >> >>For policy questions, send mail to: >> Richard Nute: ri...@ieee.org >> >> > > > >------------------------------------------- >This message is from the IEEE EMC Society Product Safety >Technical Committee emc-pstc discussion list. > >To cancel your subscription, send mail to: > majord...@ieee.org >with the single line: > unsubscribe emc-pstc > >For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson: pstc_ad...@garretson.org > >For policy questions, send mail to: > Richard Nute: ri...@ieee.org > > >------------------------------------------- >This message is from the IEEE EMC Society Product Safety >Technical Committee emc-pstc discussion list. > >To cancel your subscription, send mail to: > majord...@ieee.org >with the single line: > unsubscribe emc-pstc > >For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson: pstc_ad...@garretson.org > >For policy questions, send mail to: > Richard Nute: ri...@ieee.org >
