Patent ID: 8158011
Filing Date: 2012-04-17
Classification: C23C,C30B

Abstract:
1. A method of fabricating a structure including conical cubic boron nitride microstructures, comprising: forming diamond nuclei on a substrate, growing a diamond film on the substrate, depositing a cubic boron nitride film on the diamond film, depositing a metal film on the cubic boron nitride film, and sequentially etching the metal film and the cubic boron nitride film, including etching the metal film in a hydrogen plasma, with a negative direct current bias applied on the substrate, so that the metal film segregates into distributed mutually separated nanoscale etching masks on the cubic boron nitride film, and etching the cubic boron nitride film into a plurality of conical microstructures, using the nanoscale etching masks to define the conical microstructures.