How to set clreance design rule between two net classes

[syhaunguyen]

Hi all,

I need create clearance design rule for checking in our pcb project.

I have two net class A and B
I want to set clearances for these net classes with anything not in the class is 120mil. please help me how to set this rule in Altium Designer.

Thanks all,

[mairomaster]

Hi syhaunguyen,

If I understood correctly, you want a minimum clearance of 120mil between objects in net class A and all other objects, and minimum clearance of 120mil between objects of net class B and all other objects.

If that is the case, here is how to set up such rule with custom queries:


I am using Altium Designer 16, it might look a bit different with older versions.

[syhaunguyen]

Good day to you mairomaster it's OK now. Thanks you so much.

Once more Q, How to disable check on no-net pad? Picture attach.

[mairomaster]

The best practice in my opinion is to put a No-DRC directive to all unconnected pads in your schematics. That also ensures you will not randomly forget to connect a pin and prevents errors/warning during the schematic compilation as well. After placing the directives don't forget to re-compile the project and import the changes to the PCB.

Here is how to place the directives:

[syhaunguyen]

Thank mairomaster great to know that.