Author Message
 Post subject: Making a footprint
PostPosted: 01 Feb 2011, 16:33 
Offline

Joined: 19 Dec 2010, 07:28
Posts: 39
I'm trying to make the attached footprint. Any help would be appreciated. This is basically a SON-8 package with 4 pins joined to make a thermal pad.


You do not have the required permissions to view the files attached to this post.


Top
 Profile  
 
 Post subject: Re: Making a footprint
PostPosted: 02 Feb 2011, 06:08 
Offline
Technical Support

Joined: 14 Jun 2010, 06:43
Posts: 2762
You should use polygonal pads for this.
Create a shape on signal layer (choose "signal" layer from drop-down menu, select "polygon" tool and define points on design area), then right click on its outline and select "Convert to pad" from submenu.


Top
 Profile  
 
 Post subject: Re: Making a footprint
PostPosted: 02 Feb 2011, 15:34 
Offline

Joined: 09 Jul 2010, 13:03
Posts: 15
The main problem you may run into is that DipTrace does not allow multiple pins in a schematic symbol to be connected together in the pcb pattern. If you design your schematic symbol with 5 pins, it will work ok. If the schematic symbol has 8 pins and you try to connect 4 pins to one pad, the pattern editor complains. Or you get drc errors in the pcb layout program.


Top
 Profile  
 
 Post subject: Re: Making a footprint
PostPosted: 03 Feb 2011, 08:08 
Offline

Joined: 19 Dec 2010, 07:28
Posts: 39
Alex wrote:
You should use polygonal pads for this.
Create a shape on signal layer (choose "signal" layer from drop-down menu, select "polygon" tool and define points on design area), then right click on its outline and select "Convert to pad" from submenu.


Thanks everyone. I found this option after posting. I ended up just making a 5-pin part. I guess it would be possible to make some dummy pins for the extra pins in the schematic part.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group