CPU Electron migration heat/current

I know what electron migration is and why it happens, I am looking to find out some info on the relationship between current/heat generated by leakage/and electron migration.

Is electron migration just a function of current? I don't see how it could be. So how does heat in the core accelerate electron migration and what is the relationship?

Done a google and can't find what im looking for......

In case you haven't come across them.

This is an introduction, some physics about electromigration, effect of current density and heat, ...

http://www.cadence.com/whitepapers/electromigration.html

This one has some pictures and illuatrations.

http://www.eas.asu.edu/~schroder/Electromigration.pdf

Thanks Hitech I hadn't come across those yet, I'll check them out. I thought you might know of something to point me too.

Thanks!!

Blacks equation! exactly what I was looking for, I just didn't know what it was called.. Thanks again