Patent ID: 7012027
Filing Date: 2006-03-14
Classification: H01L

Abstract:
1. A method of removing a high k dielectric layer from a substrate, comprising the steps of: (a) providing a substrate with isolation regions and an active area between said isolation regions; (b) depositing a high k dielectric layer on said substrate; (c) forming a patterned gate electrode on said high k dielectric layer; and (d) anisotropically etching through exposed portion of said high k dielectric layer with a plasma etch comprising one or more halogen containing gases; wherein said anisotropically etching step is performed in an etch chamber and is comprised of a flow rate between about 2 and 100 standard cubic centimeters per minute (sccm) for the one or more halogen containing gases, at a temperature between 20° C. and 200° C.; wherein said anisotropically etching step includes of adding one or more O wherein said high k dielectric layer includes HfO