SAN FRANCISCO, May 7 : Nvidia has paid several billion dollars to help fund new factories for glassmaker Corning in addition to taking an equity stake of up to $3.2 billion disclosed earlier this week, the CEOs of the two companies confirmed on Thursday. Nvidia CEO Jensen Huang said the AI chip supplier has made "a multi-billion-dollar prepayment" that was not disclosed when it announced an equity investment earlier this week in Corning, whose glass is used in the fiber-optic cables that