# US 2023/0053596 A1 · Motor, disk drive device, and manufacturing method of motor

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- Number: US 2023/0053596 A1
- Document ID: US20230053596A1
- Status: Published application
- Kind: A1
- Application number: 17/888,479
- Filed: 2022-08-16
- Published: 2023-02-23
- Earliest claimed: 2021-08-18
- Assignees: Nidec Corporation
- Applicants: Nidec Corporation
- Inventors: Shingo KAKITA
- Web page: https://patentgrep.com/patent/US20230053596A1

## CPC

- G11B 19/2009: {Turntables, hubs and motors for disk drives; Mounting of motors in the drive (means for clamping of disk to turntable G11B17/022 and subgroups)}
- G11B 5/4813: {Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm (G11B5/484 takes precedence)}
- G11B 25/043: {using rotating discs}
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

A motor includes a rotor, a stator, a shaft, a base part, a hole part, a connector, and a metal connection portion. The rotor is rotatable about the axial direction. The stator radially opposes the rotor. The shaft extends axially along the central axis and supports the rotor. The base part is disposed on axial one side relative to the stator, and radially expands from the shaft. The hole part axially penetrates the base part. The connector covers the hole part when viewed from the axial direction. The metal connection portion connects the connector to the base part. The metal connection portion is disposed between the base part and the connector in the axial direction, and surrounds the hole part when viewed from the axial direction.

## Claims

### Claim 1

A motor comprising:
a rotor rotatable about an axial direction;
a stator radially opposing the rotor;
a shaft axially extending along a central axis and supporting the rotor;
a base part disposed on axial one side relative to the stator and radially expanding from the shaft;
a hole part axially penetrating the base part;
a connector covering the hole part when viewed from an axial direction; and
a metal connection portion connecting the connector to the base part, wherein
the metal connection portion is disposed between the base part and the connector in an axial direction and surrounds the hole part when viewed from an axial direction.

### Claim 2 (depends on 1)

The motor according to claim 1, wherein
the metal connection portion is disposed along all outer edge parts at an axial end parts of the hole part.

### Claim 3 (depends on 1)

The motor according to claim 1, wherein
the metal connection portion covers at least a part of a side surface of the connector.

### Claim 4 (depends on 1)

The motor according to claim 1, wherein
a material of the metal connection portion is silver.

### Claim 5 (depends on 1)

A disk drive device comprising:
the motor according to claim 1; and
an access portion performing at least any of reading and writing of information on a disk supported by the motor.

### Claim 6 (depends on 5)

The disk drive device according to claim 5 further comprising:
a housing accommodating the motor, the disk, and the access portion, wherein
the housing is filled with a gas having a density lower than a density of air.

### Claim 7

A manufacturing method of a motor comprising steps of:
disposing a paste substance containing metal nanoparticles and a dispersion medium in a region outside relative to an outer edge part of an axial end part of the hole part;
covering the hole part with the connector by disposing the connector at an axial end part of the base part with the paste substance interposed therebetween; and
forming the metal connection portion by burning the paste substance.

### Claim 8 (depends on 7)

The manufacturing method of a motor according to claim 7, wherein
in the step of disposing the paste substance, a mean particle diameter of the metal nanoparticles is equal to or less than 10 nm.