# US 2021/0242055 A1 · Cutting blade position detecting method

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- Number: US 2021/0242055 A1
- Document ID: US20210242055A1
- Status: Published application
- Kind: A1
- Application number: 17/147,610
- Filed: 2021-01-13
- Published: 2021-08-05
- Earliest claimed: 2020-01-31
- Assignees: Disco Corporation
- Applicants: Disco Corporation
- Inventors: Atsushi KOMATSU
- Web page: https://patentgrep.com/patent/US20210242055A1

## CPC

- H10P 72/0606: {Position monitoring, e.g. misposition detection or presence detection}
- H10P 72/0428: {Apparatus for mechanical treatment or grinding or cutting}
- H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10

## Abstract

A cutting blade position detecting method using a cutting apparatus including a holding table that holds a workpiece, and a cutting unit in which a cutting blade for cutting the workpiece held by the holding table is mounted in a rotatable state, includes a groove forming step of causing the cutting blade to further cut into the workpiece including a first groove formed by causing the cutting blade to cut into the workpiece, to form the workpiece with a second groove of which one end portion in a width direction does not overlap with the first groove whereas another end portion in the width direction overlaps with the first groove, and a calculating step of calculating the lower end position of the cutting blade based on a length of the one end portion in the width direction of the second groove formed in the workpiece.

## Claims

### Claim 1

A cutting blade position detecting method for detecting a lower end position of a cutting blade, using a cutting apparatus including a holding table that holds a workpiece, and a cutting unit in which the cutting blade for cutting the workpiece held by the holding table is mounted in a rotatable state, the cutting blade position detecting method comprising:
a groove forming step of causing the cutting blade to further cut into the workpiece including a first groove formed by causing the cutting blade to cut into the workpiece, to form the workpiece with a second groove of which one end portion in a width direction does not overlap with the first groove whereas another end portion in the width direction overlaps with the first groove; and
a calculating step of calculating the lower end position of the cutting blade based on a length of the one end portion in the width direction of the second groove formed in the workpiece.