Patent ID: 6398974
Filing Date: 2002-06-04
Classification: C23F,H01L

Abstract:
A method of forming an electrode, comprising:forming an aluminum layer on a substrate and a molybdenum layer on the aluminum layer; forming a photoresist pattern on a predetermined portion of the molybdenum layer; etching the molybdenum layer to expose the aluminum layer using a first mixed solution of (H3PO4+HNO3+CH3COOH+H2O) and the photoresist pattern as an etch mask; etching the exposed aluminum layer with a second mixed solution of (H3PO4+HNO3+CH3COOH+H2O) and the photoresist pattern as an etch mask; and removing the photoresist pattern; wherein a concentration of the second mixed solution of (H3PO4+HNO3+CH3COOH+H2O) used to etch the aluminum layer differs from a concentration of the first mixed solution of (H3PO4+HNO3+CH3COOH+H2O) used to etch the molybdenum layer.