Nidec Corporation

Masakazu Matsuyama

Xiang Zhang

Ryosuke Onoe

Kazuhiro Fujitani

Tomohiro Yoneda

Junzo Fujinawa

Tadahiro Kuramoto

Takaharu Funatsu

Akitsugu Miwa

A base member is structured to define a portion of a casing in which a gas with a density lower than that of air is to be sealed and to support a motor to be housed in the casing. The base member includes a base body made of a cast material, an information mark, and an insulating coating layer. The information mark includes casting information and is located on a portion of a surface of the base body. The insulating coating layer is defined on the surface of the base body and covers the information mark.

Base member including information mark and insulating coating layer, and disk drive apparatus including the same

In a method of manufacturing a spindle motor, a sheet preferably made of a thermoplastic resin is closely adhered to an upper surface of a base portion of a spindle motor such that the sheet covers a base hole of the base portion. Next, heat is applied to a region of the sheet which coincides with the base hole to define a sheet hole continuous with the base hole. Thereafter, a coil is arranged over the base portion, and a conducting wire defining the coil is extended through the sheet hole and the base hole to be drawn downwardly out of the base portion. The sheet hole is thus defined after the sheet is closely adhered to the base portion. In addition, the sheet hole is defined by melting the resin through application of the heat. It is therefore easy to arrange the sheet and define the sheet hole.

Spindle motor, disk drive apparatus, and method of manufacturing spindle motor

Method of manufacturing a spindle motor

Growing community of inventors

Kyoto, Japan

Masakazu Matsuyama