Patent ID: 6328848
Filing Date: 2001-12-11
Classification: H01L

Abstract:
An etching tool for use in fabricating a semiconductor workpiece of the type comprising a metal layer, an ARC layer disposed on said meta layer, and a photoresist pattern disposed on said ARC layer opposite said metal layer, the tool comprising:a fixture for holding sad semiconductor workpiece during etching;a conduit configured to supply etching chemistry to the surface of said workpiece proximate said photoresist pattern while said semiconductor device is in said fixture;a first source containing a first etching chemistry for etching said ARC layer, said ARC layer comprising an inorganic dielectric, and a second source containing a second etching chemistry for etching sad metal layer, said first and second sources being configured to communicate with said conduit; anda controller for controlling the flow of said first and second etching chemistries to said conduit, wherein said controller is configured to deliver said first etching chemistry to a surface of said workpiece during etching of said ARC layer, and to thereafter deliver said second workpiece remains in said fixture.