Patent application number | Description | Published |
20090022044 | OPTICAL INFORMATION RECORDING MEDIUM AND METHOD OF MARKING BCA (BURST CUTTING AREA) INTO THE SAME - An optical information recording medium includes a read-only information recording portion, and a BCA (Burst Cutting Area) portion formed by laser marking. A reflective film on an information recording surface of the read-only information recording portion and a reflective film on the BCA portion are formed of the same material. The reflective film includes Ag as a main component, and at least one of Nd and Gd, and at least one of Sn and In as components; the reflective film including at least one of Nd and Gd of 0.1 atom % or more and 3.0 atom % or less in total and at least one of Sn and In of 3 atom % or more and 12 atom % or less in total. Recorded information is reproduced from the information recording surface of the read-only information recording portion and a BCA signal is reproduced from the BCA portion, using blue-violet laser reproducing light. | 01-22-2009 |
20090046566 | RECORDING LAYER FOR OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING MEDIUM, AND SPUTTERING TARGET FOR OPTICAL INFORMATION RECORDING MEDIUM - Provided is a recording layer for optical information storage media, which not only excels in initial reflectivity and creativity of recording marks, but also extremely excels in durability under high temperature and high humidity conditions, and which can be adequately applied to next-generation optical discs using blue-violet laser. The recording layer for optical information storage media is a recording layer to create recording marks upon irradiation with a laser beam. This recording layer is composed of a tin-based alloy containing a total of 1.0 atomic percent or more and 15 atomic percent or less of at least one selected from neodymium (Nd), gadolinium (Gd), and lanthanum (La). | 02-19-2009 |
20090057141 | AG-BASED ALLOY SPUTTERING TARGET - The invention relates to an Ag-based alloy sputtering target including at least one element selected from the group consisting of Ti, V, W, Nb, Zr, Ta, Cr, Mo, Mn, Fe, Co, Ni, Cu, Al, and Si in a total amount of 1 to 15% by weight, in which the Ag-based alloy sputtering target has an arithmetic mean roughness (Ra) of 2 μm or more and a maximum height (Rz) of 20 μm or more at a sputtering surface thereof. | 03-05-2009 |
20090252914 | OPTICAL RECORDING MEDIUM HAVING WRITE ONCE METAL REFLECTIVE FILM - A pirated optical recording medium may be determined which is produced by physically transferring a shape of pits and lands formed on a substrate of an optical recording medium. The optical recording medium is provided with excellent weatherability and long-term storage reliability. A reflective film formed of an Ag alloy film of Ag | 10-08-2009 |
20100074094 | OPTICAL INFORMATION RECORDING MEDIUM, METHOD FOR MANUFACTURING OPTICAL INFORMATION RECORDING MEDIUM, AND BCA (BURST CUTTING AREA) MARKING METHOD - The invention provides an optical information recording medium which is compatible with Blu-ray for recording a BCA signal by laser marking, in which the optical information recording medium has superior reading properties and is improved in recording properties and reliability in a BCA portion. A reflective film | 03-25-2010 |
20100143636 | OPTICAL INFORMATION RECORDING MEDIUM - 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. | 06-10-2010 |
20100226240 | READ-ONLY OPTICAL INFORMATION RECORDING MEDIUM - An optical information recording medium of the present invention is a read-only optical information recording medium in which at least one reflective film formed of an Al-based alloy and at least one light transmission layer are successively laminated on a substrate. The arithmetical mean roughness of the reflective film is 0.5 nm or less, and the thickness of the reflective film is 25 nm or more. The optical information recording medium of the present invention is the read-only optical information recording medium including the reflective film which has a high reflectivity and low jitter, preferably has excellent durability, and is used particularly appropriately in an optical disc using a blue laser such as BD-ROM or HD DVD-ROM. | 09-09-2010 |
20110003168 | REFLECTIVE FILM AND SEMI-TRANSMISSIVE REFLECTIVE FILM OF OPTICAL INFORMATION RECORDING MEDIUM, SPUTTERING TARGET FOR MANUFACTURING THEM, AS WELL AS OPTICAL INFORMATION RECORDING MEDIUM - The present invention provides an Ag-based alloy reflective film or semi-transmissive reflective film of an optical information recording medium having high reflectivity and excellent in the wet heat resistance and the light fastness. The invention relates to a reflective film or a semi-transmissive reflective film of an optical information recording medium comprising an Ag-based alloy comprising Hf in an amount of 0.05 to 0.8 atomic %. | 01-06-2011 |
20120176883 | RECORDING LAYER FOR OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING MEDIUM, AND SPUTTERING TARGET - A recording layer for optical information recording medium excellent in recording property, an optical information recording medium including the recording layer and a sputtering target useful for formation of the recording layer are provided. A recording layer for an optical information recording medium on which recording is performed through irradiation with laser light, the recording layer including an oxide of a metal of which an absolute value of the standard free energy of oxide formation per 1 mol of oxygen is larger than that of Pd (hereinafter referred to metal X) and a Pd oxide, wherein the Pd oxide includes a Pd monoxide and a Pd dioxide, and wherein a ratio of the Pd atom to a total of the metal X atom and the Pd atom which are contained in the recording layer is 4 to 85 atomic %. | 07-12-2012 |
20130052389 | OPTICAL RECORDING MEDIUM - [Object] To provide an optical recording medium that can be applied to a write-once optical recording medium having a high capacity of about 25 GB per one layer, and has good recording properties when a multilayered recording layer configuration is provided. | 02-28-2013 |
20130164544 | OPTICAL RECORDING MEDIUM - [Object] To provide an optical recording layer that is capable of controlling a reflectance and a transmittance of each recording layer and obtaining good recording properties in each recording layer | 06-27-2013 |