[PCB_FORUM] Re: Heatsink Pad

A problem arises when you try to bring a 15.x symbol that uses PASTEMASK_TOP into 15.5 *mirrored*. The equivalent bottom layer possibly doesn't exist - so the shape gets put on PACKAGE GEOMETRY/PASTEMASK_TOP_UD. If you could create the PASTEMASK_BOTTOM_UD subclass manually this would be less of a problem.

Dave Seymour wrote:

Can't you do a little "pre" filtering.

IF User defined layers = Allegro Layers
Accept

If user defined layers not equal
then add _UD

I'm a software guy, but really this seems to easy.

dave




Dave Elder wrote:

It's not fixed in 15.5.1.
User defined layers are renamed with the suffix "_UD" (in 15.5 and 15.5.1)
Unfortunately, beacause PASTEMASK_BOTTOM_UD" is more than 18 characters in length, this causes some problems with scripting a solution.

Cheers, Dave

Musetti, Carl wrote:

does anyone know if it is fixed in 15.5.1

    -----Original Message-----
    *From:* Dave Elder [mailto:dave.elder@xxxxxxxxxx]
    *Sent:* Wednesday, December 14, 2005 2:45 PM
    *To:* icu-pcb-forum@xxxxxxxxxxxxx
    *Subject:* [PCB_FORUM] Re: Heatsink Pad

    I have raised a PCR and am hoping that Uncle Ed will get Allegro
    to do just that!

    Dave Seymour wrote:

    arrrgh. Why can't Allegro just map on the way in.

    Venting done.



    Dave Elder wrote:

    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
    Please respond to
    icu-pcb-forum@xxxxxxxxxxxxx


            
    To
        <icu-pcb-forum@xxxxxxxxxxxxx>
    cc
        
    Subject
        [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



--
Dave Seymour, CID+
Catapult Communications Inc.
800 Perimeter Park Dr, Suite A
Morrisville, NC 27560

Direct: (919)653-4249
Main: (919)653-4180
Fax: (919)653-4297

Dave.seymour@xxxxxxxxxxxx




--
Dave Seymour, CID+
Catapult Communications Inc.
800 Perimeter Park Dr, Suite A
Morrisville, NC 27560

Direct: (919)653-4249
Main: (919)653-4180
Fax: (919)653-4297

Dave.seymour@xxxxxxxxxxxx



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fn:Dave Elder
n:Elder;Dave
org:Tait Electronics;PCB Design
adr:;;PO Box 1645;Christchurch;;;New Zealand
email;internet:dave.elder@xxxxxxxxxx
title:CAE Support Manager
tel;work:+64 3 3580327
tel;fax:+64 3 3583903
tel;home:+64 3 3224444
tel;cell:+64 21 37 37 25
url:http://www.taitworld.com
version:2.1
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