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How ToMake A Custom Pastemask Shape ?

I would like to make a footprint of this IC.

I got the shape of the thermal pad done , but as shown in the attached picture , the paste mask is not equally shaped like the thermal pad.

How does one create the suggested paste mask so it matches the shape of the thermal pad ?

I tried to create a flash , but the problem is that i can not see where i need to place the segments of the paste mask .

Do i need to create the footprint of the IC and then add the paste mask in PCB designer to the footprint instead of doing it in the PAD EDITOR ?

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redwire over 5 years ago

For a single pad you can always just a custom shape to the padstack editor. You need to create a drawing called a shape symbol and then make sure your path points to the ".ssm" file.

However, if you want to add multiple custom shapes to pastemask, just blank out the paste (null) in the padstack editor, then add a custom shape to the pastemask layer in the package geometry.

I can post an example if you have any issue with doing that.
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redwire over 5 years ago

For a single pad you can always just a custom shape to the padstack editor. You need to create a drawing called a shape symbol and then make sure your path points to the ".ssm" file.

However, if you want to add multiple custom shapes to pastemask, just blank out the paste (null) in the padstack editor, then add a custom shape to the pastemask layer in the package geometry.

I can post an example if you have any issue with doing that.
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nutron over 5 years ago in reply to redwire

I ended up doing what you suggested. i just created the thermal pad shape in PAD EDITOR and then added the paste mask in PCB DESIGNER to the package drawing. I wasn't sure if that is the 100% kosher way to do things though. I am sorta newish to ORCAD and still figuring things out.
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