Footprint with custom pad shapes

You will need to define a padstack which references the shape symbols (.ssm). Create a surface mount padstack with the padstack type "Single" and define your Regular pad as a Shape using the Geometry pulldown. The box to the right of the shape field that has three dots inside it is a browse button so you can select the shape symbol (.ssm) to be used. You will probably need to create a solder mask shape symbol to follow the contour of the top layer pad and may need one for the solder paste as well if you don’t reuse the top layer pad shape symbol. I attached images of the pad_designer forms for reference. Hope this helps, Mike Catrambone UTStarcom, Inc.

Thank's for the help Mike. I have followed your instructions, but I have used the same .ssm for the Begin Layer and for the soldermask_top as I want the same aperture. But now, when I try to save the padstack it gives me the error "Pad stack origin outside all pads" Regards Luis.

Most likely when you created your shape symbols with the 0,0 origin outside of the shape area. When creating shape symbols you should have the 0,0 in the center of the shape or where you want the pad center to be but it must be inside of the shape area. Another requirement for shape symbol is that the shape is defined on Class ETCH and Subclass Top which you probably already have correct but I figured I would mention it anyway.

Let me know how you make out,
Mike Catrambone
UTStarcom, Inc.

Thank's a lot Mike, I've followed your steps and now it seems to be ok. You were right, the pad shape was created in Etch/Top. The only thing it could be wrong, is the fact that I haven't used flash shape for the thermal relief and antipad under padstack designer, simply I didn´t fill the thermal relief and antipad columns because I'm not going to attach any pad to a plane, and if a copper area surrounds the component it will be applied the cleareance of the plane, won't it? Thanks again. Regards.

The thermal relief and antipad values are not required from surface mount pads because they are on the surface layers. You can specify values but by default dynamic positive shape will void the pins accordingly using the Pin to Shape DRC rules.

Mike Catrambone
UTStarcom, Inc.