Most of our boards are RF and as such rely heavily on ground planes . Using the cross hatch rather than solid pour cures the warping problem on .062" FR4 . One other method is if it's possible, try to pour copper on the top side too in the unused areas, and connect it to gnd with via stitches (otherwise the floating copper areas will just act as stray capacitance) . This way you get a better ground plane and a balanced board less prone to warping.
Matt Tudor, MSEE - RF and Microwave Design http://www.gigahertzelectronics.com > At 11:51 AM 5/14/02 -0400, you wrote: > >Hello, all: > > > >I have a double sided PCB about 4 x 4 in. square, supported by mounting > >holes, 1 in each corner. I want to pour a polygon ground plane on the top > >side. The plane will cover probably about 80% of the board area. There > >will be no plane on the bottom side. Am I going to have a problem with > >board warp with this? * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
