I do not understand the question. What are you trying to do?
Your maximum trace resistivity (ohm/unit length) is defined by the trace thickness and width. Your PCB fabricator's design rules are going to define the minimum width for a given copper thickness. Don't forget to include the plating thickness.
Google "pcb trace calculator" and you'll see lots of options to calculate the resistivity. Your engineer needs to define any trace requirements that are out of the ordinary. IPC-2152 is the standard for trace requirements as related to current flow and temperature rise.
Thanks for the info .
Is there any lower limit for trace resistance ? Any standard value ?
Best Regards ,
Hardware CAD Engineer
Vadodara , Gujarat
The theoretical limit is defined by the copper characteristics. The practical limit is defined by how thick and wide you make the trace. Typicall the standard value is 'don't care' because copper is a good conductor and the trace resistance is not significant.
Why do you ask?
Thanks for the info.
I do consider the trace resistance calculation in power supply board but just wanted to know whether is there any limit for trace resistance or not .