Patent ID: 7902078

Claim:
A processing method, comprising: a silicon oxide etching process of performing a plasma etching on a silicon oxide layer of a target object by using a patterned resist layer as a mask, wherein the target object includes an etching target layer mainly made up of silicon, the silicon oxide layer formed on the etching target layer and the patterned resist layer formed on the silicon oxide layer; a removing process of simultaneously removing the resist layer and deposits generated in the silicon oxide etching process and stuck to the target object; and a silicon etching process of performing a plasma etching on the etching target layer by a plasma generated from a processing gas containing sulfur hexafluoride (SF 6 ), oxygen (O 2 ) and silicon tetrafluoride (SiF 4 ) by using the silicon oxide layer as a mask, wherein, before the silicon etching process, the removing process is performed to etch the etching target layer by the plasma generated from the processing gas containing SF 6 , O 2 and SiF 4 by using the resist layer as a mask until the resist layer is completely removed.