Hi Earl, A 1100 I/O CCGA with 1.0 mm pitch is about 33 mm square, a 3000 I/O with 08 mm pitch is about 44 mm square. How tall are the columns you are using? Are you putting these CCGAs on FR-4? What kind of application environment are these assemblies going into? Has anybody checked these arrangements for reliability? Werner Engelmaier ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################