Class 369/285 - With mask

Subclass of Class 369 - Dynamic information storage or retrieval
Definition: Subject matter having a mask placed upon the storage medium
No. of patents: 35
Last issue date: 04/15/2008

Number	Title	Issue Date
7359306	Holographic recording medium Provided is a holographic recording medium including a recording layer in which information is to be holographically recorded, and a light-shielding layer which faces a main surface of the recording layer. The transmittance of the light-shielding layer for a recordi...	04/15/2008
7172798	High density read only optical disc A high density read only optical disc is provided. The high density read only optical disc includes a substrate having pits formed thereon; a crystalline reading assist layer; a first dielectric layer; and a mask layer composed of a metal oxide. The high density rea...	02/06/2007
7158471	Device and method for reading multilayer optical disk with compensation of shading effects The invention refers to a device and a method for scanning an optical data carrier by means of a main scanning beam being reflected by the data carrier and being detected by means of a photodetector, the data carrier having first and second layers to be scanned, the...	01/02/2007
7124441	Method and apparatus for securely associating an optically readable memory with a user machine A CD-ROM has an obscurable section wherein exists a photosensitive mask material layer or constituent operative to alter the optical properties of areas subjected to prolonged exposure to the CD-ROM read laser radiation. Digital information stored on a CD-ROM is mad...	10/17/2006
7087284	High density readable only optical disc and method of preparing the same A high density readable only optical disc includes a substrate having pits with different lengths in accordance with unit information, wherein a depth of the pit increases as the pit length increases; and a mask layer that includes a metal oxide, or a mixture of fin...	08/08/2006
7074471	Optical information recording medium, method for producing the medium, and method and apparatus for recording information using the medium An optical information recording medium of the present invention includes a transparent substrate and a multi-layered film provided on the transparent substrate. The multi-layered film includes at least a recording layer that is changed between two or more different...	07/11/2006
7038992	Mask pattern forming method and device, and method of producing optical disk A method of forming a mask pattern includes a formatting step for formatting authoring data in accordance with formats of specified media either by a fixed amount at a time or continuously. The authoring data is obtained by an authoring operation in which base infor...	05/02/2006
7014903	Optical recording medium An optical recording medium includes a support substrate, a light transmission layer whose one surface constitutes a light incidence plane through which a laser beam is projected, an information recording layer formed between the support substrate and the light tran...	03/21/2006
6898031	Method for replicating magnetic patterns on hard disk media A system and method for replicating magnetic patterns on hard disk media includes a mask located over or above a magnetic recording layer. The recording layer may include a single, dual, or multi-layer recording layer. A pattern is or has been formed in the mask, wh...	05/24/2005
6819648	Optical sample and method of writing and reading information on the same An optical sample includes a mask layer made of a material in which an aperture is produced by a chemical change, which is reversible, upon application of heat or light, and a recording layer provided at a position where an evanescent field produced in the aperture ...	11/16/2004
6741549	Optical recording medium and optical recording and reproduction apparatus An optical recording medium in accordance with the present invention is provided with a substrate, a mask layer, provided on the substrate, whose index of refraction changes due to light or heat of the substrate, and a recording layer that is provided away from the ...	05/25/2004
6667146	Optical recording medium and reproducing method therefor An optical recording medium includes a recording layer and a mask layer on a substrate. The mask layer is formed of a material whose light transmittance is decreased by light irradiation and is increased by heating....	12/23/2003
6620480	Pre-engraved substrate for magnetic, magneto-optical, or phase transition optical disc The invention concerns a pre-engraved substrate for a memory disc recordable by magnetic, magneto-optical or phase transition constraint, its manufacturing method and the resulting disc. Said pre-engraved substrate comprises a support (1) having at its su...	09/16/2003
6249507	Information storage systems utilizing media with optically-differentiated data sites Storage density in an optical data storage media and system is increased many times the resolution limit by fully utilizing the much smaller detection limit by differentiating and isolating the active data sites in the media optically. The tracks are preo...	06/19/2001
5592461	Methods of recording and reproducing information using an optical recording medium An optical recording medium is provided with a masking layer on a side of a recording layer for receiving a reproducing beam. The masking layer is prepared from that containing photochromic dye molecules having absorption at the wavelength of the reproduc...	01/07/1997
5465238	Optical random access memory having multiple state data spots for extended storage capacity An optical memory is disclosed in which data is stored in an optical data layer capable of selectively altering light such as by changeable transmissivity or polarization. The data is illuminated by controllable light sources and an array of multi-surface...	11/07/1995
5457006	Method of manufacturing photo-mask and photo-mask manufactured thereby A photo-mask and a method of manufacturing a photo-mask, which includes the steps of applying a resist film onto a substrate of quartz, glass and the like, subjecting the resist film to light exposure and development to form a fine resist pattern, etching...	10/10/1995
5436885	Optical disc and optical system for reproducing the optical disc An optical disc has a recording film with information recorded thereon, and a photochromic material film provided adjacent the recording film. The photochromic material film is made of a photochromic material. The photochromic material has a first state i...	07/25/1995
5238786	Method for manufacturing high recording density optical disk A mastering method for making a high recording density optical disk is disclosed, in which a substrate with a photosensitive material layer is selectively exposed to a focused laser light having a predetermined power representing information to be recorde...	08/24/1993
5087535	Method of manufacturing photo-mask and photo-mask manufactured thereby A photo-mask and a method of manufacturing a photo-mask, which includes the steps of applying a resist film onto a substrate of quartz, glass and the like, subjecting the resist film to light exposure and development to form a fine resist pattern, etching...	02/11/1992
5004671	Optical recording medium and optical recording method An optical recording medium is provided which comprises a diacetylene derivative compound and at least one compound selected from the group consisting of azulenium salt compounds, pyrylium dyes, diene compounds, croconic methines, and polymethine compound...	04/02/1991
4980262	Producing a replicate video disc by a method of photographic contact printing A photographic contact printing process is disclosed having application in the mass production of replicate video discs from a master disc, and other applications wherein it is desired to replicate micro-detail over a relatively large area. A problem with...	12/25/1990
4957851	Image recording medium comprising a diacetylene derivative compound film and a radiation absorbing layer An image forming medium is provided which has an image forming layer comprising a monomolecular film of a diacetylene derivative compound or its built-up film and a radiation absorbing layer. The diacetylene derivative compound may be polymeric. An image ...	09/18/1990
4954422	Recording material containing a layer of polymer particles and a superimposed metallic layer A photosensitive recording material for recording information by means of a local change in the optical properties of a recording layer under the action of light having a high energy density, and a process for its preparation....	09/04/1990
4937171	Photosensitive recording material A photosensitive recording material for recording information by means of a local change in the optical properties of a recording layer under the action of light having a high energy density, and a process for its preparation....	06/26/1990
4910107	Optical recording-reproducing method and device by using the same An optical recording-reproducing method comprising the step of irradiating a radiation for polymerization on an optical recording medium having a recording layer containing at least one selected from the group consisting of azulenium salt compounds, pyryl...	03/20/1990
4888266	Process for producing information supports capable of being optically read by variations in absorption The invention relates to a process for producing supports intended for the optical recording and reading of information. A layer containing a diazo compound is deposited onto a metallized substrate. Recording is obtained by exposing the support to light t...	12/19/1989
4863832	Optical recording employing diacetylene compound and dye to change color and form pits An optical recording method is provided which comprises a step of irradiating light corresponding to recording information on the optical recording medium having a recording layer containing at least one selected from the group consisting of azulenium sal...	09/05/1989
4778747	Method of manufacturing optical memory element A method of manufacturing an optical memory element, which includes the steps of applying a first photo-resist layer onto a glass substrate for an optical memory element, laying a mask plate on the glass substrate applied with the first photo-resist layer...	10/18/1988
4737444	Optical information recording medium An optical information recording medium is disclosed, which comprises a plastic substrate; an undercoat layer formed thereon, comprising a condensate of a mixture of (1) at least one metal alcoholate selected from the group consisting of a tetra-alkoxy me...	04/12/1988
4478782	Erasable recording medium comprising a dimer acid polyamide resin Provided is an erasable recording medium and a method for recording and erasing same. The erasable recording medium comprises a thermally stable substrate and a polymeric layer deposited on the substrate comprised of a dimer acid polyamide. Such a recordi...	10/23/1984
4423137	Contact printing and etching method of making high density recording medium A process for making a radiation-reflecting record carrier, such as a video disc, is provided on which video and/or audio information is stored in an optically readable track in which reflective areas alternate with non-reflective areas, the two areas hav...	12/27/1983
4387381	Optical recording medium and information record with tracking aid An optical recording medium comprising a substrate, a light absorptive layer overlying the substrate, a buffer layer overlying the absorptive layer and a masking layer having slots therethrough overlying the buffer layer. The invention also includes an in...	06/07/1983
4118736	Method of and apparatus for controlling the optical reading of recorded information Information which is recorded on a record medium is read therefrom by a main beam of radiant energy, such as a main light beam, which impinges and scans the record medium so as to be modulated with the recorded information. An additional beam of radiant e...	10/03/1978

PatentStorm

Bizarre Patents

PatentStorm News

Class 369/285 - With mask