# US 11,299,420 B2 · Glass article

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- Number: US 11,299,420 B2
- Document ID: US11299420B2
- Status: Granted
- Kind: B2
- Application number: 16/361,959
- Filed: 2019-03-22
- Published: 2019-09-26
- Granted: 2022-04-12
- Earliest claimed: 2018-03-23
- Assignees: AGC Inc.
- Applicants: AGC Inc.
- Inventors: Takanori Fukushi; Satoshi Kanasugi; Toru Ikeda
- Web page: https://patentgrep.com/patent/US11299420B2

## CPC

- C03C 15/00: Surface treatment of glass, not in the form of fibres or filaments, by etching (etching or surface-brightening compositions, in general C09K13/00)
- C03B 23/0252: {by gravity only, e.g. sagging (C03B23/035 takes precedence)}
- C03B 23/0258: {Gravity bending involving applying local or additional heating, cooling or insulating means}
- C03B 23/0352: {by suction or blowing out for providing the deformation force to bend the glass sheet}
- C03B 23/0357: {by suction without blowing, e.g. with vacuum or by venturi effect}
- C03B 25/025: {Glass sheets}
- C03B 29/025: {Glass sheets}
- C03C 3/083: containing aluminium oxide or an iron compound
- C03C 3/085: containing an oxide of a divalent metal
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03C 21/002: {to perform ion-exchange between alkali ions (C03C21/005 takes precedence)}
- B24C 1/06: for producing matt surfaces, e.g. on plastic materials, on glass
- B24C 11/00: Selection of abrasive materials {or additives} for abrasive blasts (polishing compositions C09G)
- B60R 11/0229: {for displays, e.g. cathodic tubes}
- Y02P 40/57: Improving the yield, e-g- reduction of reject rates
- Y10T 428/24355: Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- B24C: ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A glass article including a first main surface, a second main surface, and an end face, in which: the glass article includes an antiglare layer on the first main surface side; the antiglare layer has a glass transition point Tg of equal to or less than a glass transition point Tg0 of the glass article at a center portion in a cross section along a thickness direction; and the first main surface has a protrusion diameter y (μm) that satisfies the relation (1) with respect to a 60° specular gloss (gloss value) x (%) of the first main surface, y>−0.0245x+3.65 (1).

## Claims

### Claim 1

A glass article comprising a first main surface, a second main surface, and an end face, wherein:
the glass article comprises an antiglare layer on the first main surface side;
the antiglare layer has a glass transition point Tg of equal to or less than a glass transition point Tg0 of the glass article at a center portion in a cross section along a thickness direction; and
the first main surface has a protrusion diameter y (μm) that satisfies the relation (1) with respect to a 60° specular gloss (gloss value) x (%) of the first main surface,
y>−0.0245x+3.65 (1)
wherein the protrusion diameter y (μm) is determined by examining the first main surface with a laser microscope to obtain an XYZ data of a surface shape, obtaining an image from the XYZ data, subjecting the obtained image to a filtering with an image processing software to acquire a smoothed image, subtracting an XYZ data of the smoothed image from the XYZ data of the surface shape to obtain a profile, cutting the profile at a height of a bearing height+0.01 μm, converting a resultant protrusion section into a circle, and taking the diameter of the circle as the protrusion diameter y, and
the 60° specular gloss (gloss value) x (%) is a value measured by the method described in JIS Z8741:1997 (ISO 2813:1994).

### Claim 2 (depends on 1)

The glass article according to claim 1, wherein at least one of the first main surface and the second main surface comprises a curved portion.

### Claim 3 (depends on 1)

The glass article according to claim 1, having a ratio Z1/Z0 of 0.9-1.1, wherein Z is an atomic composition ratio of X/Si between Si and an element X selected from the group consisting of Al, B, Zr, and Ti, Z1 is the atomic composition ratio Z in the antiglare layer, and Z0 is the atomic composition ratio Z in the glass article at the center portion in the cross section along the thickness direction.

### Claim 4 (depends on 1)

The glass article according to claim 1, having an alkali metal composition ratio represented by K/(Li+Na+K) in the antiglare layer being larger than an alkali metal composition ratio in the glass article at the center portion in the cross section along the thickness direction.

### Claim 5 (depends on 1)

The glass article according to claim 1, wherein the antiglare layer comprises a fluorine atom (F) or a chlorine atom (Cl).

### Claim 6 (depends on 1)

The glass article according to claim 1, wherein the 60° specular gloss (gloss value) x (%) is 15% or more and 130% or less.

### Claim 7 (depends on 1)

The glass article according to claim 1, comprising an aluminosilicate glass.

### Claim 8 (depends on 1)

The glass article according to claim 1, wherein the protrusion diameter y (μm) is 1.5 μm or more and 3.0 μm or less.

### Claim 9 (depends on 1)

The glass article according to claim 1, wherein the first main surface has a surface skewness Ssk of less than 0.

### Claim 10 (depends on 1)

The glass article according to claim 1, having a haze value of 0.1% or more and 50% or less.

### Claim 11 (depends on 10)

The glass article according to claim 10, having an in-plane standard deviation of the haze value of 0-10%.

### Claim 12 (depends on 1)

The glass article according to claim 1, wherein at least one of the first main surface and the second main surface comprises a surface compression stress layer having a surface compression stress (CS) of 500 MPa or higher.

### Claim 13 (depends on 1)

The glass article according to claim 1, wherein the first main surface further comprises a functional layer.

### Claim 14 (depends on 13)

The glass article according to claim 13, wherein the functional layer is an antireflection treatment layer.

### Claim 15 (depends on 13)

The glass article according to claim 13, wherein the functional layer is an antifouling treatment layer.