Novel ultrananocrystalline diamond probes for high-resolution low-wear nanolithographic techniques

Abstract

A monolithically integrated 3-D membrane or diaphragm/tip (called 3-D tip) of substantially all UNCD having a tip with a radius of about less than 50 nm capable of measuring forces in all three dimensions or being used as single tips or in large arrays for imprint of data on memory media, fabrication of nanodots of different materials on different substrates and many other uses such as nanolithography production of nanodots of biomaterials on substrates, etc. A method of molding UNCD is disclosed including providing a substrate with a predetermined pattern and depositing an oxide layer prior to depositing a carbide-forming metallic seed layer, followed by seeding with diamond nano or micropowder in solvent suspension, or mechanically polishing with diamond powder, or any other seeding method, followed by UNCD film growth conforming to the predetermined pattern. Thereafter, one or more steps of masking and/or etching and/or coating and/or selective removal and/or patterning and/or electroforming and/or lapping and/or polishing are used in any combination to form the tip or probe.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

For the purpose of facilitating an understanding of the invention, there is illustrated in the accompanying drawings a preferred embodiment thereof, from an inspection of which, when considered in connection with the following description, the invention, its construction and operation, and many of its advantages should be readily understood and appreciated.

FIG. 1 is a schematic representation of the steps to fabricate multiple 3-D tips;

FIG. 2 is a schematic representation of a 3-D tip.

Claims

1. An 3-D tip measuring forces in three dimensions, said 3-D tip including membranes or a diaphragm and a tip associated therewith, said membranes or diaphragm and said tip being substantially all UNCD.

2. The 3-D tip of claim 1, wherein said probe is monolithic.

3. The 3-D tip of claim 1, wherein said membranes and/or diaphragm are in communication with said tip.

4. The 3-D tip of claim 1, wherein said tip has a radius of less than about 150 nanometers (nm).

5. The 3-D tip of claim 1, wherein said tip has a radius in the range of from about 50 to about 150 nm.

6. The 3-D tip of claim 1, wherein said membranes and/or diaphragm have thickness greater than about 100 nm.

7. The 3-D tip of claim 1, wherein said tip has a surface roughness of less than about 40 nanometers (nm).

8. The 3-D tip of claim 1, wherein said tip has a surface roughness of less than about 20 nm.

9. The 3-D tip of claim 1, wherein said tip has a RMS surface roughness of less than about 11 nm.

10. The 3-D tip of claim 1, wherein said tip is made by molding and has an as-molded stress of less than about 500 MPa.

11. The 3-D tip of claim 1, wherein said tip is made by molding and has an as-molded stress of less than about 100 MPa.

12. The 3-D tip of claim 1, and further including a plurality of supports extending from said membranes or diaphragm and integral therewith.

13. The 3-D tip of claim 1, wherein said tip is a polyhedron.

14. The 3-D tip of claim 1, wherein said tip is a pyramid.

15. The 3-D tip of claim 1, wherein at least 95% of the UNCD has average grain sizes in the range of between about 2 and about 5 nm.

16. The 3-D tip of claim 1, wherein at least some of said UNCD is electrically conductive.

17. The 3-D tip of claim 1, wherein said tip is chemically or biologically functionalized.

18. The 3-D tip of claim 1, and further including an electrical element in communication therewith.

19. The 3-D tip of claim 1, and further including a piezoresistive element in communication therewith.

20. The 3-D tip of claim 1, and further including a heating element in communication therewith.

21. A 3-D tip simultaneously measuring forces in three dimensions, said 3-D tip including UNCD membranes or diaphragm and tips,said tip having a surface roughness of less than about 11 nm.

22. A method of forming a 3-D tip of substantially all UNCD, comprising providing a substrate with a predetermined pattern therein, depositing an oxide layer on at least a portion of the predetermined pattern,depositing one or more of W, Mo, Ti or a carbide-forming layer on the oxide layer,depositing UNCD on the W, Mo, Ti, or a carbide forming layer and conforming to the predetermined pattern on the substrate followed by one or more of masking and/or etching and/or coating and/or selective removal and/or patterning and/or electroforming and/or lapping and/or polishing in any combination to form a molded monolithic UNCD structure having an integral tip and membranes and/or a diaphragm.