| Patent Number |
Title Of Patent |
Date Issued |
| 7616552 |
Phase-change optical recording medium having first and second track pitches |
November 10, 2009 |
| An optical disc or other optical recording medium enables reading barcode-shaped-BCA marks in a burst cutting area (BCA) with tracking on while making tampering with the BCA marks difficult. The optical disc 100 has a first area 102 containing tracks at a first track pitch d2, and a |
| 7540006 |
Optical information recording medium and manufacture method thereof |
May 26, 2009 |
| An optical information recording medium includes one or more information layers including a recording layer for recording/reproducing an information signal by irradiation with a laser light, and a seperating layer or a protective substate on which a first information layer of the inf |
| 7525893 |
Electron beam recorder and electron beam irradiation position detecting method |
April 28, 2009 |
| An electron beam recorder includes an electron optical system for irradiating an electron beam on a master of an information recording medium and an electron beam irradiation position detecting unit for detecting an irradiation position of the electron beam in the electron optical sy |
| 7474604 |
Electron beam recorder, electron beam irradiation position detecting method and electron beam ir |
January 6, 2009 |
| An electron beam recorder includes an electron optical system for irradiating the electron beam on a master of an information recording medium and a shielding plate for shielding the electron beam. An electron beam irradiation quantity detector is provided on the shielding plate and |
| 7359305 |
Electron beam recorder and electron beam irradiation position detecting method |
April 15, 2008 |
| An electron beam recorder includes an electron optical system for irradiating an electron beam on a master of an information recording medium and an electron beam irradiation position detecting unit for detecting an irradiation position of the electron beam in the electron optical sy |
| 7272099 |
Exposure apparatus of an optical disk master, method of exposing an optical disk master and pinh |
September 18, 2007 |
| An exposure apparatus of an optical disk master having a laser source, a deflector for deflecting a recording laser beam obtained based on the laser beam of the laser source and an objective lens for focusing the recording laser beam on an optical disk master, has a lens system provi |
| 7236434 |
Exposure apparatus of an optical disk master, method of exposing an optical disk master, and wav |
June 26, 2007 |
| Apparatus and method for exposing an optical disk master having a laser source, a deflector for deflecting a recording laser beam based on the laser beam of the laser source and an objective lens for focusing the recording laser beam on an optical disk master, including a liquid crys |
| 7101588 |
Apparatus and method for applying liquid material to form a resin layer |
September 5, 2006 |
| A liquid material is applied by spin coating it onto a first main surface of a flat plate to form a coating of the liquid material thereon. The flat plate includes a second main surface which is opposite to the first main surface and a hole which passes through the flat plate. The ap |
| 7068590 |
Optical disc and manufacturing method for the same |
June 27, 2006 |
| The width and/or depth of guide grooves on the disc substrate surface are changed in each data recording layer and the guide groove depth of the recording film layer is appropriately shaped in each data recording layer to provide a high density, high recording capacity optical disc. The |
| 7053394 |
Recording device of master disk for information recording medium |
May 30, 2006 |
| Two light beams are incident on the same position on a surface of an object (105) to be measured obliquely from upper sides facing each other, and positions at which the reflecting light beams are incident on respective predetermined detection surfaces are detected by position detect |
| 7046613 |
Exposure apparatus of an optical disk master, method of exposing an optical disk master and pinh |
May 16, 2006 |
| An exposure apparatus of an optical disk master having a laser source, a deflector for deflecting a recording laser beam obtained based on the laser beam of the laser source and an objective lens for focusing the recording laser beam on an optical disk master, has a lens system provi |
| 6894959 |
Method and apparatus for exposing optical disk master |
May 17, 2005 |
| A method for exposing an optical disk master includes rotating a substrate disk coated with a photoresist, focusing a beam on the photoresist for exposure through an objective lens, and exposing the photoresist so as to form tracks on the substrate disk in its circumferential direction. |
| 6882605 |
FOCUSING METHOD, METHOD OF DETECTING FOCAL POINT DEVIATION, METHOD OF FORMING MASTER OF DATA STO |
April 19, 2005 |
| Focusing control for maintaining a distance between an objective lens and a recording medium constant is executed using light whose wavelength is longer than that of recording light and whose detection sensitivity is better than that of the recording light, and a deviation of a focal poi |
| 6842420 |
Optical disc having plural grooves of different depths |
January 11, 2005 |
| The width and/or depth of guide grooves on the disc substrate surface are changed in each data recording layer and the guide groove depth of the recording film layer is appropriately shaped in each data recording layer to provide a high density, high recording capacity optical disc. The |
| 6835432 |
Optical disc and method for manufacturing the optical disc |
December 28, 2004 |
| An optical disc comprises a first base plate having a surface in which a recess is formed and a multi-layer structure disposed over the surface. The multi-layer structure includes a reflection layer, a recording layer, and a transparent member. The reflection layer is disposed on the sur |
| 6700862 |
Optical disc and manufacturing method for the same |
March 2, 2004 |
| The width and/or depth of guide grooves on the disc substrate surface are changed in each data recording layer and the guide groove depth of the recording film layer is appropriately shaped in each data recording layer to provide a high density, high recording capacity optical disc. The |
