nice site Bill. > -----Original Message----- > From: Brooks Bill [SMTP:[log in to unmask]] > Sent: Thursday, June 29, 2000 9:26 AM > To: 'TechNet E-Mail Forum.'; Ryan Grant > Subject: RE: [TN] BGA pads size > > I have put together a little website to gather together some PCB Designer > reference materials for Designers... in there under 'programs and > calculators' I have a link to a site that has Ball Grid array layout > information that you might find useful... it's a document that Motorola > put > out on the web... > http://home.fda.net/bbrooks/pca/pca.htm > > here's a direct link to the Motorola page - > http://www.mot-sps.com/solutions/wired/pbga/layout.html#geometry > > - Bill Brooks > > > -----Original Message----- > From: Ryan Grant [mailto:[log in to unmask]] > Sent: Thursday, June 29, 2000 7:15 AM > To: [log in to unmask] > Subject: Re: [TN] BGA pads size > > > Stella, > PCB pad sizes should match the CSP pad size. If you can't find > that > out from the component manufacture, a good rule of thumb is to use pads > that > are 80% of the size of the ball. > > Thanks > > Ryan Grant > Advanced Technology Engineer > MCMS > (208) 898-1145 > [log in to unmask] > > > > -----Original Message----- > > From: Stella Neyman [SMTP:[log in to unmask]] > > Sent: Wednesday, June 28, 2000 12:08 PM > > To: [log in to unmask] > > Subject: [TN] BGA pads size > > > > Technetts, > > Please help. > > I have to do the PCB layout for 8mm x 8 mm BGA. 108 Balls size of 0.3 > mm, > > spacing is 0.5 mm. > > Could somebody advise what would be the pads size? What is would be vias > > diameter? > > Please advise. > > Thank you, > > Stella > > > > ############################################################## > > 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 Keach Sasamori at [log in to unmask] or > > 847-509-9700 ext.5315 > > ############################################################## > > ############################################################## > 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 Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################