A METHOD AND SYSTEM FOR FORMING A FEATURE IN A HIGH-K LAYER

摘要

A method for plasma processing a high-k layer includes providing a substrate having a high-k layer formed thereon, on a substrate holder in a process chamber, and creating a plasma in the process chamber to thereby expose the high-k layer to the plasma. RF power is applied to the substrate holder, the RF power having a characteristic to reduce a rate of formation of an oxide interface layer located between the substrate and the high-k layer. A device includes a feature etched in a high-k layer. The etch profile of the device can include a reduced bird's beak, and a surface of the substrate in an etched region can be substantially coplanar with a substrate under a non-etched area.