Method of manufacturing diamond knife for ultra-microtome for continuous cutting

Patent metadata

Field	Value
Publication number	US-11260488-B2
Application number	US-201815995018-A
Country	US
Kind code	B2
Filing date	May 31, 2018
Priority date	May 31, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

Provided is a method of manufacturing a diamond knife for an ultra-microtome, including determining a shape and size of a knife, performing a multiphase flow analysis on movement of a droplet at a fore-end of the knife with the determined shape and size, processing a fine pattern to ensure hydrophobic property according to a result of the flow analysis, and grinding a blade of the knife after the processing of the fine pattern to minimize an interval between the pattern and the blade and, thus, a knife blade is always maintained in a wet state due to a droplet movement between a hydrophobic fine pattern and a hydrophilic surface to continuously generate ultrathin slices.

First claim

What is claimed is:

1. A method of manufacturing a diamond knife for an ultra-microtome with a hydrophobic surface, the method comprising:
determining a shape and size of a knife with a hydrophilic surface;
performing a multiphase flow analysis on a movement of a droplet to determine a ratio between the hydrophilic surface of the knife and a hydrophobic surface to be provided on the knife that would cause a given droplet on the knife to be guided to be moved to a fore-end portion of a knife blade of the knife;
processing, according to a result of the multiphase flow analysis, a fine pattern on the knife to provide the hydrophobic surface on the knife; and
subsequent to the processing of the fine pattern, grinding the knife blade such that the fore-end portion of the knife blade is hydrophilic and a portion of the knife that is adjacent to the fore-end portion is hydrophobic, thereby guiding the given droplet to be moved to the fore-end portion of the knife blade.

2. The method of claim 1 , wherein the multiphase flow analysis comprises a two-dimensional (2D) finite-element analysis on a droplet movement.

3. The method of claim 1 , wherein the processing of the fine pattern uses a mechanical processing method.

4. The method of claim 3 , wherein the mechanical processing method is laser processing.

5. The method of claim 4 , wherein the laser processing uses a laser with a wavelength of 150 nm to 250 nm.

6. The method of claim 4 , further comprising forming an inclined diagonal groove on a surface of the knife during the laser processing.

7. The method of claim 4 , further comprising forming a lattice groove on a surface of the knife during the laser processing.

8. A diamond knife manufactured using the method of claim 6 , wherein the inclined diagonal groove is formed on the surface of the knife.

9. A diamond knife manufactured using the method of claim 7 , wherein the lattice groove is formed on the surface of the knife.

10. A diamond knife manufactured using the method of claim 1 , wherein the fine pattern is formed on a surface of the knife.

Assignees

• Korea Basic Science Inst

Inventors

• Hur Hwan
• Kim Geon-Hee
• Bae Ji Yong
• Kweon Hee-Seok

Classifications

• B24B3/54

  of hand or table knives · CPC title

• G01N2001/061

  Blade details · CPC title

• G01N1/06 Primary

  providing a thin slice, e.g. microtome · CPC title

• B24B3/36 Primary

  of cutting blades (B24B3/58 takes precedence) · CPC title

• B23K26/364

  for making a groove or trench, e.g. for scribing a break initiation groove · CPC title