Multi-level read-only optical disc and method of production |
Title: |
Multi-level read-only optical disc and method of production |
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Application Number: |
200510053509 |
Application Date: |
2005/03/08 |
Announcement Date: |
2005/09/07 |
Pub. Date: |
2007/11/07 |
Publication Number: |
1664940 |
Announcement Number: |
100347775 |
Grant Date: |
2007-11-7 |
Granted Pub. Date: |
2007-11-7 |
ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
G11B 7/24, G11B 7/26, G11B 7/007, G11B 20/10 |
Applicant(s): |
Tsinghua University |
Inventor(s): |
Xu Duanyi, Ni Yi, Pan Longfa, Chen Ken, Xiong Jianping, Lu Da, Hu Heng, Ma Jianshe, Pei Jing, Zhang Qicheng |
Key Words: |
Multi-level, read-only, optical disc, production method |
Abstract: |
This invention relates to multiple step read only disc and its process method with several kinds of recording grooves, wherein the grooves have different widths longitude sections and different areas, which satisfies the following formula: S£½¡Òh(x)dx, wherein, S represents longitude section area; x represents the coordinates of the width direction; h(x) represents longitude section distribution function of the record groove; the integral area is the whole longitude section area of the record groove. |
Claim: |
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Priority: |
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PCT: |
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LegalStatus: |
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