John;

Your reference is correct, but I believe it is a typo in IPC-SM-782.
.025mm would be .001in the statement in 782 is  "Maximum conductor width
should be .025mm [.010in]"

Would someone from IPC like to clarify? I believe the .010in figure is
closer to reality.

Regards
Tom G.



On Mar 6,  6:16am, john balchunas wrote:
> Subject: Re: SMTTraces
> >Date: Wed, 05 Mar 1997 09:02:11
> >To: [log in to unmask] (Mike Modrzejewski)
> >From: john balchunas <[log in to unmask]>
> >Subject: Re: SMTTraces
> >
> >Hello Mike, I came across the following info in Surface Mount Design and
> Land Pattern standard IPC-SM-782A section 3.6.2.2..."Wide conductors
> connecting to a land area can act as a solder thief...Narrow the conductor
> as it enters the land area.  Maximum conductor width should be .025
> mm....The minimum conductor length should be .025 mm."  Hope this helps!
 John
> >
> >
> >At 06:54 AM 3/4/97 CST, you wrote:
> >>
> >>
> >>Hi my name is Michael Modrzejewski
> >>Iam looking for some information on trace width going into SMT pads.
> >>Is there any problems with a .025 trace going into a 1206,0805 or 0603 pads
?
> >>IS there a rule of thumb for this ?
> >>
> >>MOJO


>
>-- End of excerpt from john balchunas



-- 
Tom Garman KC4WAR
PCB Designer and Librarian
Sacred cows make the best hamburger (stolen from a friend)
Don't force it, get a bigger hammer.

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