Patent ID: 11955342
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An apparatus for a plasma processing comprising a first electrode configured to place a substrate thereon within a chamber; a second electrode facing the first electrode; and a controller,
wherein the controller is configured to control:
preparing the substrate having a first region formed of silicon oxide and a second region formed of silicon nitride;
etching the first region by exposing the substrate to plasma of a first processing gas including a fluorocarbon gas, and forming a deposit including fluorocarbon on the first region and the second region;
etching the first region and the second region by radicals of the fluorocarbon included in the deposit; and
removing the deposit by plasma of a second processing gas which does not include oxygen,
wherein the controller is configured to apply a high frequency power to the second electrode but not to apply a high frequency power to the first electrode in the removing of the deposit, and
wherein the first processing gas is different from the second processing gas.