# US 2010/0166949 A1 · Antireflective coating compositions and methods for depositing such coatings compositions

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- Number: US 2010/0166949 A1
- Document ID: US20100166949A1
- Status: Published application
- Kind: A1
- Application number: 12/488,285
- Filed: 2009-06-19
- Published: 2010-07-01
- Earliest claimed: 2005-05-11
- Assignees: Yazaki Corporation
- Inventors: Yongan Yan; Satyabrata Raychaudhuri; Matthew Emilio Coda
- Web page: https://patentgrep.com/patent/US20100166949A1

## CPC

- G02B 1/113: using inorganic layer materials only
- C08F 283/10: on to polymers containing more than one epoxy radical per molecule {(C08F283/004 takes precedence)}
- C08F 290/06: Polymers provided for in subclass C08G
- C08F 290/064: {Polymers containing more than one epoxy group per molecule}
- C09D 5/006: {Anti-reflective coatings}
- C09D 7/62: modified by treatment with other compounds
- C09D 133/06: of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D 151/10: grafted on to inorganic materials
- C08K 3/36: Silica
- Y10S 977/773: Nanoparticle, i.e. structure having three dimensions of 100 nm or less
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

Coating compositions, and methods for depositing them on the surface of an article to produce an antireflection coating, are disclosed. In one embodiment, the coating composition includes a (meth)acrylate-functional silicon alkoxide, silica particles, a (meth)acrylate monomer, an epoxy (meth)acrylate oligomer, a photoinitiator, a solvent, an acid, and water. The relative amounts of these constituents are controlled such that, when the coating composition is deposited onto the surface of an article and cured, it has a refractive index less than about 1.60 at a wavelength of 510 nm. In another embodiment, the coating composition includes an organo-metallic compound other than an organo-metallic compound of silicon, an epoxy-functional silicon alkoxide, a non-epoxy-functional silicon alkoxide, a curing agent compatible with epoxy-functional molecules, a solvent, an inorganic acid, and water. The relative amounts of these constituents are controlled such that, when the coating composition is deposited onto the surface of an article and cured, it has a refractive index greater than about 1.70 at a wavelength of 510 nm. The coating compositions are deposited in a process that produces an antireflection coating in less than 90 minutes of processing time.

## Claims

### Claim 1

A coating process comprising the steps of:
providing a first coating composition that comprises at least one meth)acrylate-functional silicon alkoxide, silica particles, at least one (meth)acrylate monomer, at least one epoxy (meth)acrylate oligomer, at least one photoinitiator, at least one solvent, at least one acid, and water; and
forming an antireflection coating on a surface of an article, wherein the step of forming includes a step of depositing a first coating layer onto the surface of the article, wherein the step of depositing the first coating layer includes
dispensing the first coating composition onto the surface of the article, and
curing the dispensed first coating composition, to produce the first coating layer,
wherein the first coating layer has a refractive index less than about 1.60 at a wavelength of 510 nm;
wherein the step of forming an antireflection coating has a time duration of less than 90 minutes,
and wherein the antireflection coating has prescribed optical properties and prescribed adhesion and abrasion resistance properties.

### Claim 2 (depends on 1)

A coating process as defined in claim 1, wherein the step of forming has a time duration of less than 30 minutes.

### Claim 3 (depends on 1)

A coating process as defined in claim 1, wherein the step of forming has a time duration of less than 10 minutes.

### Claim 4 (depends on 1)

A coating process as defined in claim 1, wherein the first coating layer deposited in the step of depositing has a refractive index less than about 1.55 at a wavelength of 510 nm.

### Claim 5 (depends on 1)

A coating process as defined in claim 1, wherein the first coating layer deposited in the step of depositing has a refractive index less than about 1.50 at a wavelength of 510 nm.

### Claim 6 (depends on 1)

A coating process as defined in claim 1, wherein:
the process further comprises a step of providing a second coating composition that comprises at least one organo-metallic compound other than an organo-metallic compound of silicon, at least one epoxy-functional silicon alkoxide, at least one non-epoxy functional silicon alkoxide, at least one curing agent compatible with epoxy-functional molecules, at least one solvent, at least one inorganic acid, and water; and
the step of forming further includes a step of depositing a second coating layer onto the surface of the article, wherein the step of depositing the second coating layer includes
dispensing the second coating composition onto the surface of the article, and
curing the dispensed second coating composition, to produce the second coating layer,
wherein the second coating layer has a refractive index greater than about 1.70 at a wavelength of 510 nm.

### Claim 7 (depends on 6)

A coating process as defined in claim 6, wherein the second coating layer has a refractive index greater than about 1.80 at a wavelength of 510 nm.

### Claim 8 (depends on 6)

A coating process as defined in claim 6, wherein the second coating layer has a refractive index greater than about 1.90 at a wavelength of 510 nm.

### Claim 9 (depends on 6)

A coating process as defined in claim 6, wherein the step of depositing the second coating layer occurs before the step of depositing the first coating layer.

### Claim 10 (depends on 6)

A coating process as defined in claim 6, wherein the step of depositing the second coating layer alternates with the step of depositing the first coating layer, to produce an antireflection coating having at least four layers.

### Claim 11 (depends on 10)

A coating process as defined in claim 10, wherein at least one of the alternating steps of depositing the second coating layer and depositing the first coating layer includes a step of heat-treating the dispensed coating composition prior to the step of curing such dispensed coating composition.

### Claim 12 (depends on 1)

A coating process as defined in claim 1, and further comprising a step of depositing a hard-coat layer onto the surface of the article prior to the step of forming the antireflection coating.

### Claim at position 13

13-42. (canceled)