Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2007-10-16
2007-10-16
Neyzari, Ali (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S280000, C369S112010
Reexamination Certificate
active
10510460
ABSTRACT:
A recording layer (2) and a light-transmitting layer (3) are provided on a substrate (1) having a guide groove for tracking a light beam projected in a spot for information recording/reproduction. The spot light beam is projected onto the recording layer (2) through the light-transmitting layer (3) so as to record information in a first portion (G′) of the recording layer corresponding to the inside (G) of the guide groove and a second portion (L′) of the recording layer corresponding to a flat portion (L) between adjacent guide grooves. The depth d of the first portion (G′) with respect to the second portion (L′) on the light-transmitting layer side of the recording layer (2) satisfies the relation λ/5.8nf≦d≦λ/5nf where λ is the wavelength of the light and nf is the index of refraction of the light-transmitting layer (3) to the wavelength λ. The reflectance of the recording layer (2) after the recording is larger than that before the recording.
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Untranslated Office Action issued by Chinese Patent Office on Aug. 4, 2006 in connection with corresponding Chinese patent application No. 200510080234.4.
English translation of relevant parts of Examiner's comments in Japanese translation of-date Chinese Office Action submitted in lieu of statement of relevancy of prior art to present invention.
English translation of Chinese Office Action issued on Aug. 4, 2006 in connection with corresponding Chinese patent application No. 200510080234.4.
Untranslated Office Action issued by Chinese Patent Office on Jul. 21, 2006 in connection with corresponding Chinese patent application No. 03807950.X.
English translation of Chinese Office Action issued on Jul. 21, 2006 in connection with corresponding Chinese patent application No. 03807950.X.
NEC Corporation
Neyzari Ali
Ostrolenk Faber Gerb & Soffen, LLP
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