Lam Research Corporation
Direct drive RF circuit for substrate processing systems

Abstract:

A direct drive circuit for providing RF power to a component of a substrate processing system includes a clock generator to generate a clock signal at a first frequency, a gate driver to receive the clock signal and a half bridge circuit. The half bridge circuit includes a first switch with a control terminal connected to the gate driver, a first terminal and a second terminal; a second switch with a control terminal connected to the gate driver, a first terminal connected to the second terminal of the first switch and an output node, and a second terminal; a first DC supply to supply a first voltage potential to the first terminal of the first switch; and a second DC supply to supply a second voltage potential to the second terminal of the second switch. The first voltage potential and the second voltage potential have opposite polarity and are approximately equal in magnitude.