Patent ID: 7288008

Claim:
A method for defining geometries in a semiconductor wafer in a processing chamber, the semiconductor substrate being supported on a surface of a plate electrode, the method comprising: forming a reusable refractory coated laminar mask on a surface of the semiconductor wafer by defining geometries in a laminar mask substrate corresponding to the geometries to be defined in the semiconductor wafer, forming apertures through the laminar mask substrate, and forming a layer of refractory material over at least one surface of the etched laminar mask substrate; positioning the reusable refractory coated laminar mask over the semiconductor wafer; coupling an RF power source to the plate electrode so that coupling between the RF power source and the reusable refractory coated laminar mask is based upon a capacitive coupling therebetween for causing ions to be accelerated through the apertures in the reusable refractor coated laminar mask; and treating the semiconductor wafer through the apertures in the reusable refractory coated laminar mask.