Tynax ~ Patent Library

Patent for Sale:

Ultrahard Coating comprising Diamond and cBN    

Ultra-hard/smooth multilayer coating (MLC) made of nanodiamond and nanocrystalline cubic boron nitride.


The MLC is formed on a substrate, comprising: a base layer, and a plurality of nano-cBN and nanodiamond layers deposited on the base layer in alternate sequence. The thickness of the layers can be engineered for a specific use and the intended number of layers could be obtained.

The MLC is a composite material with characteristics of reduced stress, low friction coefficient, high chemical inertness, high adhesion, extreme wear/abrasion resistance, and extreme thermal conductivity.

Primary Application of the Technology

The MLC can protect chemically and mechanically the surfaces of products, and can increase chemical and mechanical resistance and heat dissipation. They are attractive for use in construction of microelectromechanical systems (MEMS).

Patent Summary

U.S. Patent Classes & Classifications Covered in this listing:

Class 428: Stock Material Or Miscellaneous Articles

This is the residual class for: 1. Stock material in the form of a structurally defined web, sheet, rod, strand, fiber, filament, cell, flake, particle not provided elsewhere. 2. Stock material in the form of a web, sheet, mass or layer which consists of or contains a structurally defined constituent or element. 3. A nonstructural laminate defined merely in terms of the composition of one or more layers. 4. An article of manufacture or an intermediate-article not provided for elsewhere. 5. A process for applying an impregnating material to a naturally solid product such as a wood beam, a sheet of leather or a stone, or for applying a coating to a base, and which process includes no significant method step.

Subclass 216: No layer or component greater than 5 mils thick