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Missing Soldermask on all IC pins

Hi everyone,

I am new to PCB designing. I am designing a 2 layer PCB using OrCAD 17.4. I complete the schematic and PCB design. But I started generating Geber files, I saw Solder mask top film has no solder mask on all IC pins. I haven't created symbols and PCB footprints by myself. I have downloaded from the Ultra Librarian.

I tried to fix it by : In Board Geometry -> soldermask_top, Shape-> Rectangle, draw rectangle around the pin and shape fill -> static solid. But it doesn't help.

Can anyone help how to fix this problem ??

I appreciate your help.

Thanks in advance.

steve over 4 years ago

Try Tools - Padstack - Modify Design Padstack then click on a pin, right click - Edit. This opens Padstack Editor, go to the Mask Layers tab and enter values for Soldermask_Top and Pastemask_Top (for solder paste). Save the padstack where you keep your padstacks (padpath) then use File - Update to Design and Exit which will update the board. It might be worth mentioning to UltraLibrarian which symbols these are so they can be fixed for other users.
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Sugreev over 4 years ago in reply to steve

Thanks!

It works. I will mention to Ultra Librarian.
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Sugreev over 4 years ago in reply to Sugreev

I fixed 4 of my IC's pin but I am stuck with the voltage regulator pin. It is 4 pin. The 3 pins are showing. the fourth one -GND is not showing soldermask.

I checked its pad stack, it has values for Solder mask and paste mask in Mask layers. Still it is not showing solder mask on the soldermask film.

Can you please help how that can be fixed ?

Thanks
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steve over 4 years ago in reply to Sugreev

Difficult to debug without seeing the symbol so maybe you can give the part number and I can get it from UltraLibrarian? But check to make sure that the padstacks in the library have been refreshed (Tools - Padstack - Refresh) and that the library padstack does have the correct layers defined. Is it a default pad shape or does it use a custom shape symbol?
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Sugreev over 4 years ago in reply to steve

Thanks!

I sort that out..
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