Patent ID: 6077450
Filing Date: 2000-06-20
Classification: C23F,H01L

Abstract:
A method for etching platinum comprising the steps of:depositing a platinum layer on an insulator;depositing on the platinum layer an aluminum alloy mask layer having a high selectivity with the platinum layer;patterning the aluminum alloy mask layer to be spaced apart by a predetermined distance; andetching the platinum layer using the aluminum alloy mask layer and an etch gas chosen from the group comprising CF.sub.x, C.sub.y F.sub.x, C.sub.2 F.sub.4 or C.sub.2 F.sub.8 and O.sub.2 such that an etch ratio of the platinum layer and the aluminum alloy mask layer of more than 2 results to etch the platinum layer by using the aluminum alloy mask layer.