Electronics > Proteus

Is it possible to create a NTPH pad with a solder resist clearance?

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DiBosco:
Folks,


I've been asked to ensure there is no solder resist round a non plated through hole (I'm not convinced this is necessary, but you gotta do what you gotta do - or at least what the boss says).

I can't see a way of doing this. I can't even draw a void around a pad on the solder resist layer as far as I can tell.

Anyone know of a way to achieve this please?

Many thanks! :)

DiBosco:
Looks like you have to create a padstack that uses pins with different attributes on the resist layers and use that to create a new part. 

electrolust:

--- Quote from: DiBosco on August 10, 2017, 09:09:38 am ---I can't even draw a void around a pad on the solder resist layer as far as I can tell.

--- End quote ---

The guard gap setting of a pad defines the gap to the resist.  I think the default is 5mil.  0 = no gap.  "not present" = tented/covered pad.

For a non-plated hole, will a padstack with 'none' selected for every layer work?

electrolust:
Talk about timing.

I just came across this error dialog in the circular pad creation dialog:


--- Quote ---If you are trying to create a hole that is 'only a hole' with no copper, you can place a pad, edit it, and set it to be on the Drill Layer.
--- End quote ---

So if you do that, maybe the guard gap setting will be honored and you end up with your NPTH with resist expansion.

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