Optical information recording medium
AssigneesSony Disc & Digital Solutions Inc., Kabushiki Kaisha Kobe Seiko Sho, Kobelco Research Institute, Inc.
InventorsNaoki Okawa, Yuki Tauchi, Junichi Nakai
Life of this patent
Estimating the term…
Abstract
There is provided a read-only optical information recording medium including a reflective film which has high reflectivity, and is superior in environment resistance at the time of being kept in a high-temperature, high humidity environment as well as light resistance at the time of being kept in a high-intensity light irradiation environment and repeating reproduction durability against a repeating reproduction test. In a read-only optical information recording medium in which at least one reflective film and at least one light transmissive layer are laminated in order on a substrate, the reflective film is made of a Ag-base alloy including 0.01 to 1.0 at % of Bi and 0.1 to 13.0 at % of Cu.
Claims6
1-5. (canceled)
An optical information recording medium comprising a read-only optical information recording medium in which at least one reflective film and at least one light transmissive layer are laminated in order on a substrate,
- wherein the reflective film includes a Ag-base alloy including 0.01 to 1.0 at % of Bi and 0.1 to 13.0 at % of Cu.
An optical information recording medium comprising a read-only optical information recording medium in which a first reflective film, a first light transmissive layer, a second reflective film and a second light transmissive layer are laminated in order on a substrate,
- wherein the first reflective film and the second reflective film are the same as or different from each other, and include a Ag-base alloy including 0.01 to 1.0 at % of Bi and 0.1 to 3.0 at % of Cu.
Dependencies are inferred from the claim text.