last year i attended the pcb west and did the lee richey (sp?) 2-day seminar. somebody asked him if the very high- tech boards required hand-laying the traces, and he implied that because of some of boards' complexity, it simply wasn't practical. he said that you simply set up the design rules correctly.
however, mr. lomax mentions that he almost never autoroutes, and i know that mr. lomax knows what he's doing, so i've got to think that what lee said was essentially just his opinion. but here's my opinion: hand-laying a complex board is an acquired skill, and the first few attempts are likely to be very time-inefficient and also poorly done. i've got a board right now thats got 576MHz coming in on a coax and driving some ECL circuitry. there's some TTL on it too. i want to hand-lay some critical lines and then auto- route the rest in a decent manner. i've been scrolling thru the design rules and i'm familiar with most of them, but what i would like is some advice on a few critical rules that will lead towards a decent layout. since i'm looking for a controlled impedance, i figure my width constraint will be fixed at 8mil. and i probably would like 10mil spacing between traces... crosstalk drops way off then, according to johnson's black magic book. how do i set up the other rules to give me a good layout? thanks, miker * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
