Method of automatically routing nets according to current density rules

A method comprising:

• providing a plurality of pins of a layout to be routed together using a net, each pin having a pin value associated with it;
• using at least one pin value, determining a first requirement for a first track segment of the net;
• determining a first track width for the first track segment of the net based on the first requirement;
• performing an automatic routing of the net using the first track segment, wherein the automatically routed first track segment has the first track width;
• using at least one pin value, determining a second requirement for a second track segment of the net;
• determining a second track width for the second track segment of the net based on the second requirement, wherein the second track width is different from the first track width;
• and
• performing the automatic routing of the net using the second track segment, wherein the automatically routed second track segment has the second track width.

A method comprising:

• providing a plurality of first pins of a layout to be routed together using a first net, each first pin having a pin value associated with it;
• providing a plurality of second pins of the layout to be routed together using a second net, each second pin having a pin value associated with it;
• using a pin value associated with at least one of the first pins, determining a first track width for the first net;
• performing an automatic routing of the first net using a track having a first track width;
• using a pin value associated with at least one of the second pins, determining a second track width for the second net;
• and
• performing an automatic routing of the second net using a track having the second track width, wherein the second track width is different from the first track width.