Base member including information mark and insulating coating layer, and disk drive apparatus including the same
AssigneeNidec Corporation
InventorsTomohiro Yoneda, Takaharu Funatsu, Akitsugu Miwa, Masakazu Matsuyama, Junzo Fujinawa, Tadahiro Kuramoto
Life of this patent
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Abstract
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.
Claims10
A base member 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 comprising:
- a base body made of a cast material;
- an information mark including casting information and located on a portion of a surface of the base body;
- and
- an insulating coating layer defined on the surface of the base body;
- wherein
- the insulating coating layer covers the information mark;
- and
- the base body includes:
- a decreased thickness portion;
- and
- an increased thickness portion with a thickness greater than that of the decreased thickness portion;
- and
- the information mark is located on a surface of the increased thickness portion within the surface of the base body.
Dependencies are inferred from the claim text.