EAGLE Central Forums
Where the EAGLE community meets. Sponsored by Stratford Digital.

Home » CadSoft Support Forums » eagle.suggest.eng » Arbitrary Pad Shapes for packages without devices: more than one pad
Arbitrary Pad Shapes for packages without devices: more than one pad [message #146385] Fri, 15 June 2012 14:02 Go to next message
Christian Bohrer
Messages: 246
Registered: April 2007
Senior Member
I am currently working on a board without schematic. My client has designed the schematic under
orcad, and I have only placed the packages (without devices) on the board and loaded the netlist.

My problem is that (in library) I have to add a matrice of 56 vias (pads) in the Thermal PAD (smd)
of a D2PAK (connected all together inside the same polygon), but as the package is not defined in a
device, the 56 vias are electrically ignored in the board, only the thermal pad is taken in account
(as eagle help says):

EAGLE Help [Arbitrary Pad Shapes] :
If a polygon or wire is connected to more than one pad within a package,
only one of the pads will be considered electrically connected to the polygon or wire.
The other pads will cause DRC errors, unless they are all connected to the same pin in a device.

What I am asking is a derogation of this rule for boards builded without schematic and thus without
devices.

My request:
If a polygon is connected to more than one pad within a package (linked or not to a device),
all pads will be considered electrically connected to the polygon, without DRC errors.

Why not add something like this in the eaglerc.usr:
Option.PackageEditor.Polygon.AllPadsInsideConnected = "1"

Please Mr EAGLE, do that for me!
Christian Bohrer


Re: Arbitrary Pad Shapes for packages without devices: more than one pad [message #158076 is a reply to message #146385] Wed, 05 November 2014 09:02 Go to previous messageGo to next message
Christian Bohrer
Messages: 246
Registered: April 2007
Senior Member
"Christian Bohrer" <c.bohrer@azelectronic.fr> a écrit dans le message de news:
jrffad$2im$1@cheetah.cadsoft.de...
> I am currently working on a board without schematic. My client has designed the schematic under
> orcad, and I have only placed the packages (without devices) on the board and loaded the netlist.
>
> My problem is that (in library) I have to add a matrice of 56 vias (pads) in the Thermal PAD
> (smd) of a D2PAK (connected all together inside the same polygon), but as the package is not
> defined in a device, the 56 vias are electrically ignored in the board, only the thermal pad is
> taken in account (as eagle help says):
>
> EAGLE Help [Arbitrary Pad Shapes] :
> If a polygon or wire is connected to more than one pad within a package,
> only one of the pads will be considered electrically connected to the polygon or wire.
> The other pads will cause DRC errors, unless they are all connected to the same pin in a device.
>
> What I am asking is a derogation of this rule for boards builded without schematic and thus
> without devices.
>
> My request:
> If a polygon is connected to more than one pad within a package (linked or not to a device),
> all pads will be considered electrically connected to the polygon, without DRC errors.
>
> Why not add something like this in the eaglerc.usr:
> Option.PackageEditor.Polygon.AllPadsInsideConnected = "1"
>
> Christian Bohrer

I am still waiting for this feature.
Re: Arbitrary Pad Shapes for packages without devices: more than one pad [message #168301 is a reply to message #158076] Mon, 16 January 2017 01:04 Go to previous message
justin li
Messages: 1
Registered: January 2017
Junior Member
This is Lucy from Dragon Innovation, nice to talk with you on the phone just now.
We are conducting a new sourcing task of *SinoGuide Thermal Interface Material (TIM)* for our client . This material should come in either a roll or sheet form then is die cut into the customer’s specific size. Currently they are using a 150mm x 150mm x 3mm thick piece of this material (roughly 2300mm^2). You could find the attached spec of what the client is using now.

--
To view any images and attachments in this post, visit:
https://www.element14.com/community/message/213103
Previous Topic: Looking for element
Next Topic: Using a LSM330DLC with ATMEGA328-MMH using I2C
Goto Forum:
  


Current Time: Tue May 23 16:57:11 GMT 2017