Fusion Electronics
Working an electronics project and need help with the schematic, the PCB, or making your components? Join the discussion as our community of electronic design specialists and industry experts provide you their insight and best practices.
Showing results for 
Show  only  | Search instead for 
Did you mean: 

how to reduce isolation width

Message 1 of 4
406 Views, 3 Replies

how to reduce isolation width



I'm really struggling on trying to find a way to reduce the isolation width on my pcb.

for each wire, I have an isolation of 0.6mm on both side, and would like to reduce it to 0.2mm.

I tried to change the "isolation" parameter in the "modify" section, but it only changes the wire width and not the isolation width...

I've attached a sample

thanks in advance for your help




Message 2 of 4
in reply to: burfin

ok... seems I found the settings, even, very hard to use ...

this is related to "pour copper" in fusion360. I have to change the "isolate" parameter to change the spaces.


best regards


Message 3 of 4
in reply to: burfin

I'm not certain what setting you found, but if you select one of the polygon edges, the isolate parameter sets the minimum distance between it and another signal. I say minimum because polygon fills are not allowed to violate DRC, so you must also change the clearance values if you want the distance to be less than 6 mils.

Message 4 of 4
in reply to: burfin

Hi @burfin 


I'd like to give some basic information on this topic:  There are several places you would have to check.

  • There are the clearance values in the Design Rules. Rules DRC/ERC menu, DRC command in 2D PCB editor
    In the Clearance tab, please check the value for Wire - Wire
  • You might have net classes defined that are valid for certain signals in the layout; Check the settings
    in Rules DRC/ERC menu, CLASS command. Is there a value for Clearance set?
  • Check the properties of your polygon. There can be set a value for Isolate

Hope this helps.



Richard Hammerl


Can't find what you're looking for? Ask the community or share your knowledge.

Post to forums  

Autodesk Design & Make Report