Miker, Nope, a surface mount pad is just that, no matter which surface it's on (top or bottom). It's only the thru-holes or blind vias you have to worry about. Over-lapping smt pads, on different layers should, by definition, not be a problem. For either fab or assembly.
----- Original Message ----- From: "Robison Michael R CNIN" <[EMAIL PROTECTED]> To: "'Protel EDA Forum'" <[EMAIL PROTECTED]> Sent: Wednesday, February 20, 2002 2:37 PM Subject: [PEDA] how does smt work ?? > hello, > > well, thats a pretty dumb question, isn't it? hahaha. > but i'm serious. i'm trying to reproduce a board which > has smt top and bottom, and it appears that some of the > smt pads overlap from top to bottom. > > so how do smt pads work? on a thru-hole, they obviously > go thru the entire board. how far does a pad go thru as > an smt? obviously it has to at least burrow thru to any > layer it runs on, but do top and bottom overlapping smt > pads necessarily net together? i'm confused. > > let me state that i realize many complex things are > possible (blind and buried vias come to my mind), but > somehow i don't think this is the case with this board. > but i'm not sure. > > 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/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
