i assume you meant '99SE' ? the autorouter for it's time (which was not new even at that time) actually wasn't too bad, but it certainly was not made to do BGAs
it did do a decent job at lined up rows of random wired DIPS :) i wouldn't get my hopes up about autorouting that thing to do a solder mask opening smaller than the pad use a negative expansion my brain is wired in mils so... for a 40 mil pad with a 30 mil opening use solder mask expansion of -5 mils what is driving the 'solder mask defined' ? i have read both pros and cons about that but everyone i know does not do it .125mm is 4.9 mils 5 mil trace/space is almost ordinary these days for BGAs depending on the pitch we sometimes need to go to 4mil trace 4mil space AKA 4/4 Dennis Saputelli _______________________________________________________________________ CONTACT INFORMATION: _______________________________________________________________________ Integrated Controls, Inc. Tel: 415-647-0480 EXT 107 2851 21st Street Fax: 415-647-3003 San Francisco, CA 94110 www.integratedcontrolsinc.com _______________________________________________________________________ NOTE! TO PASS OUR SPAM FILTER PUT THE FOLLOWING IN SUBJECT LINE: I.C.I. Stephen R Phillips wrote: > I've made LFBGA PCB parts in protel 98 SE and I'm rather concerned or > is that befuddled? hmmmm > in any case what I have done I've been experimenting with a 4 layer > board and the (miserable) autorouter that came with it. > I've made the layer type of the pads multilayer so that each layer of > the board can connect to a pin. > Right so what's the problem? > > Well there are several options for the solder mask and yet I can't see > where to specify them in the package information. IE in the LFBGA144 > package I should be able to specify a solder mask defined pad with a > solder mask hole of 0.38mm and a pad size of 0.48 mm. I also should be > able to specify a non solder mask defined pad with solder mask hole of > 0.50mm and a solder pad of 0.35mm. > > Next comes .. what trace width should I use. Currently (rightly or > wrongly) I'm attempting to use 0.125mm trace widths for connecting to > the pads. Too large? Too small? I have been setting that as the > smallest but I'm thinking that is not as wise as I had thought before. > > Is it possible to associate a set of rules WITH a package? IE LFBGA > package automatically defines the rules for the nets that connect too > it. Hints pointers appreciated. I would like to have the design rules > twisted.. err pushed toward sane directions before the autorouter goes > insane err begins it's job. > > In summary, how do I define the solder masked used with a specific > package, what is a proper trace width too use with 0.8 mm pitch BGA > packages, and is it possible to semi automate setting the design rules > based on package used with a net? > > Stephen > > 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]
