SoftBank Group has agreed to acquire semiconductor designer Ampere Computing in a move that further broadens the Japanese investment firm’s push into artificial intelligence infrastructure.

SoftBank is buying Ampere in an all-cash transaction that values the Santa Clara, California-based firm at $6.5 billion, according to a statement.

The deal for Ampere, whose early backers included Oracle and private equity firm Carlyle Group, adds to a wave of chip companies looking to capitalize on a spending boom in AI.