Patent ID: 6162367
Filing Date: 2000-12-19
Classification: B81C,H01J,H01L

Abstract:
A method of etching in a micromachining process, comprising:obtaining a sample of a material that can be etched using bromine trifluoride; andtreating said sample by contacting said sample with a gas-phase bromine trifluoride containing etchant to produce a controlled etch depth in said sample, wherein said treating comprises introducing a specific amount of the etchant into an etching chamber with said sample, leaving said etchant in said chamber for a specified time, and then introducing another specific amount of the etchant in said chamber to define a pulsed operation,wherein said treating comprises storing said etchant as a liquid material, converting the liquid to a gaseous phase, and introducing the gaseous phase material into the etching chamber.