[kleer001]

I don't have a concrete answer for you, but a suggestion to continue your line of questioning. I think you're very close to the answer, but skimmed over the path.

How do you find the answer? Talk to people in chip manufacturing, after doing some deep researching into that one particular company. While you may run into a dead-end there's other companies to query. Eventually someone will talk to you and you will become illuminated.

Be prepared, the answer might seem obvious or trite once you dig down to it.