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EAGLE User Support (English) Arbitrary Pad Shapes for packages without devices: more than one pad
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Related

Arbitrary Pad Shapes for packages without devices: more than one pad

Former Member
Former Member over 13 years ago

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 :

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

 

 

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`

end

 

 

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  • autodeskguest
    autodeskguest over 11 years ago

     

    "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 :

    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.

     

     

     

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  • autodeskguest
    autodeskguest over 9 years ago in reply to autodeskguest

    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

     

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