ANTIREFLECTION FILM AND METHOD FOR PRODUCING THE SAME

• US 20150079348A1
• Filed: 08/29/2014
• Published: 03/19/2015
• Est. Priority Date: 09/03/2013
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho (Toyota Motor Corporation)
• Original Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho (Toyota Motor Corporation)
• Inventors: TANAKA, Hiromitsu, MIZOSHITA, Norihiro, ISHII, Masahiko
• Application Number:
  US14/472,938
• Publication Number:
  US 20150079348A1
• Time in Patent Office: Days
• US Class Current: 428/148
• CPC Class Codes: C03C 17/007 containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
• CPC Class Codes: C03C 2217/45 Inorganic continuous phases
• CPC Class Codes: C03C 2217/478 Silica
• CPC Class Codes: C03C 2217/732 made of a single layer
• CPC Class Codes: C03C 2218/113 by sol-gel processes
• CPC Class Codes: C03C 23/007 by thermal treatment
• CPC Class Codes: G02B 1/113 using inorganic layer materials only
• CPC Class Codes: G02B 2207/109 Sols, gels, sol-gel materials
• CPC Class Codes: G02B 5/0226 having particles on the surface
• CPC Class Codes: G02B 5/0294 adapted to provide an additional optical effect, e.g. anti-reflection or filter
• CPC Class Codes: Y10T 428/24413 Metal or metal compound
• CPC Class Codes: Y10T 428/249969 Of silicon-containing material [e.g., glass, etc.]
• CPC Class Codes: Y10T 428/24997 Of metal-containing material

Abstract

An antireflection film comprises:

mesoporous nanoparticles having a metal oxide framework and an average particle diameter of 30 to 200 nm; and

a mesoporous transparent material having a metal oxide framework and filling voids among the nanoparticles.

Claims

1. An antireflection film comprising:

mesoporous nanoparticles having a metal oxide framework and an average particle diameter of 30 to 200 nm; and

a mesoporous transparent material having a metal oxide framework and filling voids among the nanoparticles.

2. The antireflection film according to claim 1, wherein the mesoporous nanoparticles have a silica framework.

3. The antireflection film according to claim 1, wherein the mesoporous transparent material has a silica framework.

4. The antireflection film according to claim 1, which has a concavity and convexity structure on a surface thereof with projections having an average pitch of 30 to 200 nm and an average height of 20 to 150 nm.

5. The antireflection film according to claim 1, wherein a porosity attributable to mesopores which is determined from a nitrogen adsorption isotherm is 20 to 65%.

6. The antireflection film according to claim 1, wherein an average refractive index measured by spectroscopic ellipsometry is 1.20 to 1.44.

7. The antireflection film according to claim 1, wherein a content of the mesoporous nanoparticles in terms of metal atom is 20 to 80% by mass.

8. The antireflection film according to claim 1, which has a surface subjected to a hydrophobizing treatment.

9. A multilayer antireflection film comprising:

a transparent film having a metal oxide framework; and

the antireflection film according to claim 1 arranged on a surface of the transparent film.

10. The multilayer antireflection film according to claim 9, wherein the transparent film has a silica framework.

11. A method for producing an antireflection film, comprising:

preparing a sol dispersion liquid containing mesoporous nanoparticles having a metal oxide framework, a hydrophobized surface and an average particle diameter of 30 to 200 nm, a metal alkoxide, and a surfactant;

forming a coating film using the sol dispersion liquid; and

calcining the obtained coating film to form a film containing the mesoporous nanoparticles and a mesoporous transparent material.

12. The method for producing an antireflection film according to claim 11, comprising subjecting a surface of the film obtained after the calcination to a hydrophobizing treatment.

13. A method for producing a multilayer antireflection film, comprising forming a film containing the mesoporous nanoparticles and the mesoporous transparent material on a surface of a transparent film having a metal oxide framework by the production method according to claim 11.