> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Stephen R Phillips > Sent: 23 June 2005 17:29 > To: [email protected] > Subject: [PEDA] BGA parts etc. > > Greetings having read some of the messages on dealing with > BGA's and protel99se I've a few questions. > 1) is there a repository for protel pad layouts laying about? > 2) ditto for schemative devices.
Steve Any user is welcome to upload/download or other wise use http://www.proteluser.com for posting footprints or symbols to share. > 3) is it possible to hand route the BGA routes to specific > layers using blind and buried vias then lock the routes and > let protels autorouter finish the connections to the rest of > the board? It seems blind and buried vias are a problem with it. Autorouter, your kidding right? I guess others can answer this better but I believe that the Electra autorouter does a pretty good job but never used it myself. http://www.connecteda.com/ On the right hand side you will see an article called "Autorouting Techniques/ Using ELECTRA with Protel" written by Mike Reagan. > What sort of other gotcha's would using a BGA part create? I > might have to use the 48pin memory packages, and I'm > wondering what horrors I might have to navigate around. Not a lot of horrors, depending on if you choose to define NSMD or SMD BGA pads and what pitch. If you look at the manufacturers web site most have details and process recommendtaions for layout and pad size/mask expansion/fanout etc. Freescale, TI, AD, Xilinx 7 Altera sites would yield some interesting info. Before Freescale, Motorola labs did a lot of process tests on their packages including recommendations on fanout, vias and profiles/finishes. What BGA will you use, I might already have some footprints anyway for FLASH/SDRAM etc.. John > Stephen R. Phillips was here > Please be advised what was said may be absolutely wrong, and > hereby this disclaimer follows. I reserve the right to be > wrong and admit it in front of the entire world. > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection > around http://mail.yahoo.com > > > ____________________________________________________________ > You are subscribed to the PEDA discussion forum > > To Post messages: > mailto:[email protected] > > Unsubscribe and Other Options: > http://techservinc.com/mailman/listinfo/peda_techservinc.com > > Browse or Search Old Archives (2001-2004): > http://www.mail-archive.com/[email protected] > > Browse or Search Current Archives (2004-Current): > http://www.mail-archive.com/[email protected] > > ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[email protected] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected]
