Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2005-03-29
2005-03-29
Neyzari, Ali (Department: 2655)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S275300, C369S044130
Reexamination Certificate
active
06873595
ABSTRACT:
An information recording medium includes a substrate having a microscopic pattern which has a shape of continous 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 that is formed on the microscopic pattern and a light transmitting layer having thickness of 0.05 mm. to 0.12 mm. that is formed on the recording layer. The microscopic pattern is formed so as to satisfy a relation of P≦γ/NA, wherein P is a pitch of the convex shaped section or the concave shaped section, γ is a wavelength of reproducing light beam and NA is a numerical aperture of an objective lens. Further, the microscopic pattern has modulated address information formed on both side walls of the convex shaped section that is viewed from the light transmitting layer side as a wobble having same period and phase. Furthermore, even when a laser beam is irradiated on the side opposite to the substrate of the information recording medium, a reproduced signal in high output and high quality can be obtained and an address and recorded information can be read out accurately.
REFERENCES:
patent: 6097695 (2000-08-01), Kobayashi
patent: 6128273 (2000-10-01), Horie et al.
patent: 6160776 (2000-12-01), Seo
patent: 6195325 (2001-02-01), Okanishi
patent: 6256282 (2001-07-01), Yamagami et al.
patent: 02-247818 (1990-10-01), None
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
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