Nidec Corporation

Toshiya Tsujita

Yasutaka Ino

Katsuhisa Shinohara

Tomoki Ida

Naoki Iwasaki

A disk drive housing includes an accommodation unit in which a disk and a motor are accommodated, the disk rotating about a center axis extending vertically, the motor rotating the disk; and a non-piercing first screw hole including a die-cast metal in which an upper surface is opened, the non-piercing first screw hole extending from a first end surface toward a second end surface. The first screw hole includes a first region disposed at a leading end of an inner surface of the first screw hole, the first region including a first portion of the die-cast metal member covered with a chill layer; and a second region in which a screw is disposed on an inner circumferential surface of the first screw hole, the second region including a second portion of the die-cast metal member that is exposed.

Disk drive housing

Enables the uniform, accurate application, onto microscale areas, of an in-solution oil repellent of low viscousness and in which the solvent is of extremely high volatility. A contacting piece that comes into contact with a target for application of the repellent is encased inside a sheath structure that, including the contacting piece, is lent rigidity. Therein, while the in-solution oil repellent is fed along the inside of the sheath structure, along the contacting piece itself, and onto the repellent-application target, it is coated on by the contacting piece tracing the surface of the application target. Giving at least the application start-point two coats, or a number of applications greater than that, yields a coating film of still higher uniformity.

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Kyoto, Japan

Toshiya Tsujita