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How to create library part with thermal pad?

e14 Contributor

Hi there,

 

I was hoping someone could give me the recommended flow for creating a

library package with a thermal pad.  I'm using an LME49600TS/NOPBLME49600TS/NOPB which has 5

pins and a thermal pad.  The pad is electrically connected internally

to Vee.

 

I initially tried just marking a tStop region in the shape of the pad

hoping that if I just drew a polygon over it in the layout editor and

hit ratsnest, all would work out.  All I got was a polygon around the

pad not connected to it.

 

I then tried to draw a polygon in the package and name it something but

I discovered you can't name polygons.  A square pad would work I guess

but this isn't the shape of the pad which is in the shape of a 'T'.

 

Any pointers on the correct way of doing this?  The demo board doesn't

have the pad polygon connected to the Vee pin so that shouldn't be an

issue.

 

Thanks, Shareef.

 

 

Parents

  • I am also having this problem. I cannot name my polygon to the name I want!

    If I try to do this, the end result is the dialog window where you write

    the name just dissappears after you click on the polygon edge, and the

    polygon remains the same. It's very strange in the layout editor, I can

    name my polygo whatever I need, but in the component editor, it simply

    ignores my NAME request!

     

    In modern lingo : What's up with that y'all?

     

    or eighties version: Bummer dude, this polygon is having, like, an identity

    crisis, or like, identiphobia?

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

Reply

  • I am also having this problem. I cannot name my polygon to the name I want!

    If I try to do this, the end result is the dialog window where you write

    the name just dissappears after you click on the polygon edge, and the

    polygon remains the same. It's very strange in the layout editor, I can

    name my polygo whatever I need, but in the component editor, it simply

    ignores my NAME request!

     

    In modern lingo : What's up with that y'all?

     

    or eighties version: Bummer dude, this polygon is having, like, an identity

    crisis, or like, identiphobia?

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

Children
  • in reply to e14 Contributor

    Redcutlass wrote on Tue, 29 March 2011 13:13

    but in the component editor, it simply ignores my NAME request!

     

    I think you mean the package editor?

     

    It would be nice if you could draw arbitrary stuff and have that be part of

    a pad such that the DRC doesn't create a flood of errors.  However, you

    can't.  Any time you want a connection point you have to start with a pad.

    You can then add copper to it as you like.  That will result in the right

    copper, but the DRC will give you lots of overlap errors.

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.