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/proteledaforum@techservinc.com
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

Reply via email to