Method of forming grooves of a fine periodic structure in the surface of the diamond

Patent metadata

Field	Value
Publication number	US-2020055147-A1
Application number	US-201716345966-A
Country	US
Kind code	A1
Filing date	Sep 1, 2017
Priority date	Nov 1, 2016
Publication date	Feb 20, 2020
Grant date	—

Abstract

A method of forming grooves (3) of a fine periodic structure in the surface (1) of the diamond by irradiating at least part of the surface (1) of the diamond having a mean surface roughness Ra of not more than 0.1 μm with a laser beam of a pulse width of not less than 1 ns generating a periodic intensity profile.

First claim

1 . A method of forming grooves of a fine periodic structure in the surface of the diamond by irradiating at least part of the surface of the diamond having a mean surface roughness Ra of not more than 0.1 μm with a laser beam of a pulse width of not less than 1 ns generating a periodic intensity profile.

2 . The method of forming the grooves of the fine periodic structure according to claim 1 , wherein said grooves of the fine periodic structure are regularly arranged to express a structural color.

3 . The method of forming the grooves of the fine periodic structure according to claim 1 , wherein the surface of the diamond is irradiated with said laser beam with a fluence of not less than 200 mJ/cm 2 .

4 . The method of forming the grooves of the fine periodic structure according to claim 1 , wherein said laser beam has a wavelength of shorter than 1064 nm.

5 . A mold for plastic work including a rigid member of which the working surface is the surface of the diamond,
wherein grooves of a fine periodic structure are formed in the surface of the diamond, the grooves of the fine periodic structure being regularly arranged to express a structural color.

6 . The mold for plastic work according to claim 5 , wherein the surface of the diamond includes a film of the diamond.

7 . The mold for plastic work according to claim 5 , wherein said mold for plastic work is a die for ironing work.

8 . A method of transferring grooves of a fine periodic structure by plastically working a metallic base material by using the mold for plastic work of claim 5 and, at the same time, transferring the grooves of the fine periodic structure onto the surface of the metallic base material to express a structural color.

9 . The method of transferring the grooves of the fine periodic structure according to claim 6 , wherein a base material of aluminum or an aluminum alloy is used as said metallic base material.

10 . A seamless metal can having grooves of a fine periodic structure formed in the outer surface of a metallic can body portion to express a structural color.

Assignees

• Toyo Seikan Group Holdings Ltd

Inventors

• Shiroishi Ryozo
• Takao Kenichi
• Yuasa Yoshiyuki

Classifications

• B21D37/01

  Selection of materials · CPC title

• B21D51/26

  cans or tins; Closing same in a permanent manner (making outlet arrangements B21D51/38; welding or soldering B23K) · CPC title

• B21D37/20 Primary

  Making tools by operations not covered by a single other subclass · CPC title

• B21D22/28

  of cylindrical articles using consecutive dies · CPC title

• B23K26/364 Primary

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