Platform forum

pad specific rule

federico.massimi , 02-18-2019, 12:38 AM
good morning, sorry for my english,
i'm new in altium. I'm working on my first pcb and i've a question.

how can I set specific rule for only some pad ? as an example i have some mosfet and LDO, with a termal pad, i want the my GND poligon connect all smd pad with thermal relief and only this termal pad with a direct connection.
For now my solution is place a FILL around the thermal pad and set the poligon "Pour over all same net object" but i think is a dirty solution, there is a way to create a rule like:
"for polygon: connect all smd with thermal relief except some specific pad" ?

thank you in advance
robertferanec , 02-18-2019, 03:15 AM
What Altium do you use?

In AD19 and higher you can directly select the pad and change thermal connection https://www.altium.com/altium-design...GJaJ8bzNcjArtp

In old Altiums you could for example create a rule between specific net and component (or specific pad), possibly draw a separate polygon around your thermal pad? There may be more options.
federico.massimi , 02-18-2019, 06:35 AM
I use Altium 18
Creating a rule is exactly what i want to do, but i don't know how to specify the pad in the rule. For example, how i can create a query for every pan of pin 3 of DPAK package?
Paul van Avesaath , 02-19-2019, 12:03 AM
you mean like in the picture.. (also in altium 18)
robertferanec , 02-25-2019, 11:25 AM
I am not 100% sure if you can select a pin with specific number in PCB ... hmm, I would say it should be possible - I tried to search for it, but could not find it. Anyone knows?
federico.massimi , 02-26-2019, 12:30 AM
for now i solved overlapping a FILL over the specific pad. waiting for my upgrade to Altium 19.
Thank you.
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