It improves the manufacturability during wave solder operations. Big blank areas cause problems somehow, better that the whole board have a more uniform distribution of copper on it. -----Original Message----- From: Bill Mueller [mailto:williamm@xxxxxxx] Sent: Tuesday, May 13, 2003 1:36 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] "checkered" copper plane question Hello all, I've been hitting a couple embedded design shows lately and have been seeing a couple prototype boards that have the top and bottom copper planes 'checkered' That is instead of a large continuous plane, the plane has been cut into a grid of 1-2mm squares. Has anyone else seen this? What are the benifits of this type of layout? Thanks, -Bill BTW: The guys manning the booth had answers ranging from 'I don't know' to 'better aestetics' to 'complex proprietary EMI interfusion grid' :) ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu