Situational Awareness has committed $500 million to Source Foundry, a private semiconductor startup seeking to change how chips are manufactured. The investment includes a new $400 million infusion made this week, according to people familiar with the matter. Source Foundry was founded last year by Stanford University researchers Abdulmalik Obaid and Joe Burg and has already raised at least several hundred million dollars in total. One recent fundraising valued the company at $5 billion, and Sequoia Capital has previously backed the startup.