Invention Grant
- Patent Title: Information recording disk
- Patent Title (中): 信息记录盘
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Application No.: US927542Application Date: 1992-07-29
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Publication No.: US5265086APublication Date: 1993-11-23
- Inventor: Tsutomu Ota , Mamoru Sugimoto , Yasuto Nose , Hidetoshi Yoshitaki , Tatsuro Higashi , Takashi Hayashi
- Applicant: Tsutomu Ota , Mamoru Sugimoto , Yasuto Nose , Hidetoshi Yoshitaki , Tatsuro Higashi , Takashi Hayashi
- Applicant Address: JPX Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JPX Tokyo
- Priority: JPX62-270742 19871027; JPX62-274106 19871029; JPX62-298186 19871126; JPX63-158806 19880627
- Main IPC: G11B7/24
- IPC: G11B7/24 ; G11B23/00 ; G11B3/70
Abstract:
An information recording disk formed from two substrates with a stepped central opening for receiving a hub within the stepped recess of at least one of the substrates is provided. In one embodiment, the central aperture of the first substrate is larger than the central aperture of the second substrate to form the stepped recess. In another embodiment, at least one substrate has a stepped surface defining a central aperture and a hub structure is mounted within this stepped recess to reduce overall thickness of the disk.
Public/Granted literature
- US6026892A Heat transfer tube with cross-grooved inner surface and manufacturing method thereof Public/Granted day:2000-02-22
Information query
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