Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2006-11-21
2006-11-21
Neyzari, Ali (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S275300, C369S044130
Reexamination Certificate
active
07139236
ABSTRACT:
A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P≦λ/NA, wherein P is a pitch of the convex shaped section, λ is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system. A reproducing apparatus is particularly suited for the recording medium.
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Warner Advanced Media Operations (WAMO) DVD, obtained on Jun. 28, 1999, “DVD 18 Requirements”, “Process Fundamentals”, “DVD 14/18 First Generation Equipment”, Manufacturing Considerations for DVD 14/18.
Hayashi et al., Matsushita Electric Industrial Co., Ltd., International Symposium on Optical Memory 2001, Oct. 2001, “New Replication Process Using Function-Assigned Resins for Dual-Layered Disk With 0.1 mm-Thick Cover Layer”.
Kondo Tetsuya
Nishizawa Akira
Connolly Bove & Lodge & Hutz LLP
Neyzari Ali
Victor Company Of Japan, Limited
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