Patent ID: 6352081
Filing Date: 2002-03-05
Classification: H01L,Y10S

Abstract:
A method for removing nonvolatile byproducts from interior surfaces of a semiconductor device processing chamber after a copper etch process, wherein the method comprises the following steps:(a) an oxidation step comprising contacting interior surfaces of said processing chamber with an oxidizing plasma, whereby copper containing byproducts deposited on said interior surfaces during a copper etch process are oxidized; (b) a first non-plasma cleaning step comprising contacting interior surfaces of said processing chamber with a gas comprising a fluorinated, unsaturated organic solvent, whereby at least a portion of said oxidized copper containing byproducts are volatilized into gaseous species, which are then removed from said processing chamber; and (c) a second cleaning step comprising contacting interior surfaces of said processing chamber with a plasma containing reactive fluorine species, whereby at least a portion of said copper containing etch process byproducts remaining after step (b) are volatilized into gaseous species, which are then removed from said processing chamber.