[sdiy] smt keepout area

Brock Russell brockr0 at shaw.ca
Tue Jul 31 19:05:34 CEST 2012

You could try the Footprint Expert at PCB Libraries 
I haven't used this recent version but successfully used earlier versions.


At 06:22 AM 31/07/2012, Tim Ressel wrote:
>Thanks to everyone who responded. I see know how to determine these 
>properly. Unfortunately the free land pattern calculator from PCB 
>Matrix it seems is no longer free. Anyone know of a free land 
>pattern calculator? I don't want to drop $120 to buy the standard if 
>I don't have to.
>--Tim (cheap) Ressel
>----- Original Message -----
>From: Vesa Lahteenmaki <vjhl2000 at hotmail.com>
>To: madhun2001 at yahoo.com; synth-diy at dropmix.xs4all.nl
>Sent: Monday, July 30, 2012 11:40 PM
>Subject: RE: [sdiy] smt keepout area
>As a good rule of thumb, keepout width should be 0.5 mm, so minimum 
>free space between footprints of two components will be 1.0 mm. Same 
>rule applies to the minimum distance of component bodies
>This minimum value applies to all components, not just your resistor
>This value is learned from IPC stadard:
>IPC-D-7351B "Generic Requirements for Surface Mount Design and Land 
>Pattern Standard"
> > Date: Sun, 29 Jul 2012 10:42:06 -0700
> > From: madhun2001 at yahoo.com
> > To: synth-diy at dropmix.xs4all.nl
> > Subject: [sdiy] smt keepout area
> >
> > Hi,
> >
> > I am having the dickens of a time finding out how to determine 
> the proper keepout area for a surface mount resistor. Just a 
> standard 0603. The datasheets from the manufacturers I looked at 
> show the land patterns in great detail but are mum about keepout. I 
> suspect its more a function of the machine doing the placement. 
> Does anybody know about this?
> >
> > Thanks!
> >
> > --Tim (uncharted territory) Ressel
> >
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