Patent ID: 8722547

Claim:
A method for etching a high K dielectric layer during fabrication of a semiconductor device comprising: providing a wafer into a plasma etch processing chamber, wherein said wafer comprises the high K dielectric layer and a silicon oxide containing layer; applying a source power of between about 200 watts and 600 watts to generate an inductively coupled plasma; introducing into said plasma etch processing chamber a gas consisting essentially of BCl 3 and CH 4 ; heating said wafer to a temperature of between about 175° C. and 225° C.; controlling a process pressure in the plasma etch processing chamber at between about 4 mTorr and 50 mTorr; and while applying the source power, heating the wafer, and controlling the process pressure, etching the high K dielectric layer with a selectivity of the high K dielectric layer to the silicon oxide containing layer of greater than 10:1.