Micron Technology, Inc.
Methods of forming high aspect ratio openings and methods of forming high aspect ratio features

Abstract:

Methods of forming high aspect ratio openings. The method comprises removing a portion of a dielectric material at a temperature less than about 0.degree. C. to form at least one opening in the dielectric material. The at least one opening comprises an aspect ratio of greater than about 30:1. A protective material is formed in the at least one opening and on sidewalls of the dielectric material at a temperature less than about 0.degree. C. Methods of forming high aspect ratio features are also disclosed, as are semiconductor devices.