[PCB_FORUM] Re: Heatsink Pad

Unless you are using 15.5 do not use PACKAGE GEOMETRY/PASTEMASK_TOP as the user-defined layer name.
In 15.5 this is a system-defined layer and you will get a nasty conflict if you already have a user-defined layer of this name in your designs or on symbols when you come to uprev your designs or use 15.x created symbols in 15.5.

Cheers, Dave



Gerry Meier wrote:

While in symbol - Add polygon on Package Geometry > Pastemask_top then Include this layer in your film control file
Gerry Meier
Sr. PCB Designer
Freedom CAD Services, Inc.
Voice: (603) 864-1300 x1350
AL Voice: (256) 417-6944
Email: gerry.meier@xxxxxxxxxxxxxx <mailto:gerry.meier@xxxxxxxxxxxxxx>
visit our website at<http://www.freedomcad.com


------------------------------------------------------------------------
*From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Ed Caldwell
*Sent:* Wednesday, December 14, 2005 10:09 AM
*To:* icu-pcb-forum@xxxxxxxxxxxxx
*Subject:* [PCB_FORUM] Re: Heatsink Pad


Hi Gerry,

That is the track I was originally on but I didn't see how to add the paste pad.

Ed



*"Gerry Meier" <gerry.meier@xxxxxxxxxxxxxx>*
Sent by: icu-pcb-forum-bounce@xxxxxxxxxxxxx

12/14/2005 11:03 AM
Please respond to
icu-pcb-forum@xxxxxxxxxxxxx



To
<icu-pcb-forum@xxxxxxxxxxxxx>, "Milostnik Matija ITWEH7" <milostnik@xxxxxxxxxxx>
cc

Subject
[PCB_FORUM] Re: Heatsink Pad









Ed,
You can just add the shape to the symbol on etch > top. When you import the part into you're board file assign the shape to whatever net you want and drop in some vias. You can include the soldrmask and pastemask in the symbol.
This does not require a ninth pin to be added to the logic symbol.
Gerry Meier
Sr. PCB Designer
Freedom CAD Services, Inc.
Voice: (603) 864-1300 x1350
AL Voice: (256) 417-6944
Email: _gerry.meier@xxxxxxxxxxxxxxx <mailto:gerry.meier@xxxxxxxxxxxxxx>
visit our website at<http://www.freedomcad.com


------------------------------------------------------------------------
*From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Ed Caldwell*
Sent:* Wednesday, December 14, 2005 9:52 AM*
To:* Milostnik Matija ITWEH7*
Cc:* icu-pcb-forum@xxxxxxxxxxxxx*
Subject:* [PCB_FORUM] Re: Heatsink Pad


Sorry - didn't mean to seem unfriendly

First, I generated the unique pad shape with the Allegro editor...

Start new
enter a unique file name
select drawing type - Shape symbol
in the editor - go to Shape add polygon
draw the shape
save (Important - make sure the Setup Drawing Parameters is set to Type: Shape)

Open padstack editor
go to layers tab
select each appropriate layer and change the geometry to shape (under Regular Pad)
pick the nav button beside Shape and find the unique file name you assigned to the pad shape

This still leaves a problem in my symbol. It has 8 pins and the heatsink adds a 9th pin. This means I have to add another pin to the schematic symbol in order to tie the heatsink to the appropriate same net pins.

Hope this helps

Ed


*"Milostnik Matija    ITWEH7" <milostnik@xxxxxxxxxxx>*

12/14/2005 10:21 AM

        
To
        <Ed.Caldwell@xxxxxxxxxx>
cc
        
Subject
        RE: [PCB_FORUM] Re: Heatsink Pad






Hello,
very unfriendly from you, not to tell HOW did you figure it out.
It is nice that you found a solution, but it would be even nicer, if you just would tell something like this:
==============================
never mind - figured it out by pushing on the third button from the left on the opening page.
Ed
==============================
Bye
Matija


------------------------------------------------------------------------
*From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Ed Caldwell*
Sent:* Wednesday, December 14, 2005 3:58 PM*
To:* icu-pcb-forum@xxxxxxxxxxxxx*
Subject:* [PCB_FORUM] Re: Heatsink Pad


never mind - figured it out
Ed
*Ed Caldwell <Ed.Caldwell@xxxxxxxxxx>*
Sent by: icu-pcb-forum-bounce@xxxxxxxxxxxxx

12/14/2005 09:11 AM
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        [PCB_FORUM] Heatsink Pad














How do I generate a polygon Heatsink solderpaste pad? The symbol editor accommodates copper and soldermask but no solderpaste. Is this done with a custom padstack? If so, how do I generate the polygon padshape so that I can import it into the padstack editor?

Thanks,
Ed

Ed Caldwell
Circuit Board Designer
Voice: 770-622-8707
Email: mailto:ed.caldwell@xxxxxxxxxx


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