Ask HN: How do you get a core job in a mature field?

I want to get a core job in a mature field (semiconductors).

The problem is the requirements for getting a core jobs is 20+ years experience designing chips with a large network of people who work in the industry. I have a better chance of getting a job designing the core interface of the next Facebook then designing the core functionality of a chip today.

It seems the only jobs left for an inexperienced person like me are housekeeping jobs implementing the plans those senior people create.

What options (if any) are there for getting a core job in a mature field when your still young and foolish?