# US 11,027,398 B2 · Grinding material and production method of grinding material

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- Number: US 11,027,398 B2
- Document ID: US11027398B2
- Status: Granted
- Kind: B2
- Application number: 15/737,755
- Filed: 2016-05-24
- Published: 2018-07-05
- Granted: 2021-06-08
- Earliest claimed: 2015-06-19
- Assignees: Bando Chemical Industries, Ltd.
- Applicants: Bando Chemical Industries, Ltd.
- Inventors: Kazuo Saito; Kenji Shimoyama; Tomoki Iwanaga; Toshikazu Taura
- Web page: https://patentgrep.com/patent/US11027398B2

## CPC

- B24D 3/346: {utilised during polishing, or grinding operation}
- B24D 3/00: Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D 3/04: and being essentially inorganic
- B24D 3/14: ceramic, i.e. vitrified bondings
- B24D 3/34: characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D 11/00: Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D 11/02: Backings, e.g. foils, webs, mesh fabrics
- B24D 13/147: {comprising assemblies of felted or spongy material; comprising pads surrounded by a flexible material}
- C09K 3/1436: {Composite particles, e.g. coated particles}
- B24D 2203/00: Tool surfaces formed with a pattern
- C09K 3/1409: {Abrasive particles per se (preparation of diamond C01B32/25)}
- B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

The purpose of the present invention is to provide a grinding material which has a superior grinding rate and planarizing accuracy, with the grinding rate being less likely to be reduced over a relatively long period of time. The present invention is directed to a grinding material including a base, a grinding layer overlaid on a front face side of the base and including grinding grains and a binder for the grinding grains, and an adhesion layer overlaid on a back face side of the base, in which the grinding grains are diamond grinding grains, a wear quantity of the grinding layer as determined by a Taber abrasion test is no less than 0.03 g and no greater than 0.18 g, and, an Asker D hardness measured from a front face side of the grinding layer is no less than 80° and no greater than 98°.

## Claims

### Claim 1

A grinding material comprising:
a base;
a grinding layer overlaid on a front face side of the base and comprising grinding grains and a binder for the grinding grains; and
an adhesion layer overlaid on a back face side of the base,
wherein
the grinding grains are diamond grinding grains,
the binder comprises an inorganic substance as a principal component,
the binder further comprises a filler comprising an inorganic oxide as a principal component,
a content of the filler with respect to the grinding layer is no less than 15 volume % and no greater than 75 volume %,
a wear quantity of the grinding layer as determined by a Taber abrasion test is no less than 0.03 g and no greater than 0.18 g, and
an Asker D hardness measured from a front face side of the grinding layer is no less than 82° and no greater than 98°.

### Claim 2 (depends on 1)

The grinding material according to claim 1, wherein the grinding layer comprises a plurality of grooves on a front face.

### Claim 3 (depends on 1)

The grinding material according to claim 1, wherein the grinding layer is formed by a printing process.

### Claim 4 (depends on 1)

The grinding material according to claim 1, wherein the grinding material is used in a flat grinding of a substrate.

### Claim 5

A production method of a grinding material comprising: a base; a grinding layer overlaid on a front face side of the base and comprising grinding grains and a binder for the grinding grains; and an adhesion layer overlaid on a back face side of the base, the method comprising
forming the grinding layer by printing with a grinding layer composition, wherein
the grinding layer composition comprises diamond grinding grains; a forming material of the binder comprises an inorganic substance as a principal component; and a filler comprising an inorganic oxide as a principal component, and
the grinding layer is formed such that a wear quantity of the grinding layer as determined by a Taber abrasion test is no less than 0.03 g and no greater than 0.18 g, an Asker D hardness measured from a front face side of the grinding layer is no less than 82° and no greater than 98°, and a content of the filler with respect to the grinding layer is no less than 15 volume % and no greater than 75 volume %.