Invention Grant
US4230915A Record carrier with an optically readable radiation-reflecting
information structure
失效
具有光学可读的辐射反射信息结构的记录载体
- Patent Title: Record carrier with an optically readable radiation-reflecting information structure
- Patent Title (中): 具有光学可读的辐射反射信息结构的记录载体
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Application No.: US972754Application Date: 1978-12-26
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Publication No.: US4230915APublication Date: 1980-10-28
- Inventor: Jan G. Dil , Bernardus A. J. Jacobs
- Applicant: Jan G. Dil , Bernardus A. J. Jacobs
- Applicant Address: NY New York
- Assignee: U.S. Philips Corporation
- Current Assignee: U.S. Philips Corporation
- Current Assignee Address: NY New York
- Priority: NLX7809227 19780911
- Main IPC: G11B7/007
- IPC: G11B7/007 ; G11B7/12 ; G11B7/24

Abstract:
A record carrier is described having an optically readable radiation-reflecting information structure, which comprises trackwise arranged information areas which, in the track direction and transverse to the track direction, are spaced from each other by intermediate areas. It is demonstrated that if the angle of inclination between the walls of the first areas and the normal to the record carrier has one value between 30.degree. and 65.degree. for a satisfactorily reproducible record carrier, the geometrical distance between the plane of the information areas and the plane of the intermediate areas should have one value between (165/N) nanometers and (270/N) nanometers, N being the refractive index of a transparent medium which is disposed between the first and the second plane.
Public/Granted literature
- US5359225A Thin, high leadcount package Public/Granted day:1994-10-25
Information query
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