Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7235313 | Magneto-optical recording medium, method of manufacturing magneto-optical recording medium, method of recording on magneto-optical recording medium, and method of reproduction from magneto-optical recording medium A magneto-optical medium has a recording layer having a plurality of columns extending in a lamination direction, and a reproduction layer which is placed below the recording layer and which functions as a nucleus for the columns. ... | 06/26/2007 |
| 7169454 | Multi-stack optical data storage medium and use of such medium A description is given of a multi-stack optical data storage medium (20) for rewritable recording using a focused radiation beam (30) entering through an entrance face (16) of the medium (20) during recording. The medium (20) has a... | 01/30/2007 |
| 7161755 | Increasing areal density in magnetic recording media A magnetic recording medium is made of a thin film medium that includes magnetic grains. At least one of a magnetization density of the magnetic grains, a crystalline anisotropy field of the magnetic grains, a thickness of the recording medium, an average diameter o... | 01/09/2007 |
| 7110328 | Recording and reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium An information recording/reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium that includes a first magnetic layer for recording at least information, a second magnetic layer for regulating a switched connectiv... | 09/19/2006 |
| 7079329 | Micro actuator for controlling focal depth A micro actuator for controlling a focal depth includes: a lens for forming a focal point by focusing light coming from a light source; a lens mounting unit having a lens mounted therein and allowing the lens to move in one axial direction; and an electromagnetic fo... | 07/18/2006 |
| 7050361 | Magneto-optical storage medium and optical disk drive A magneto-optical storage medium that protects against the effects of cross-talk, making it possible to further reduce the level of track density, and which also makes it possible to conduct high-density recording/playback with a reduced magnetic field for erasure a... | 05/23/2006 |
| 7038995 | Optical pickup for optically reading/writing data including convergent and aberration correction optical systems A lightweight, highly reliable optical pickup including a singlet objective lens is offered by correcting coma aberrations which adversely affect properties of the objective lens having an increased NA. A convergent optical system is composed of a singlet objective ... | 05/02/2006 |
| 6898158 | Information recording medium and information recording and reproducing slider An information recording medium including an information recording film made of an exchange-coupled multilayer film capable of magnetically reproducing a recorded information, wherein the exchange-coupled multilayer film has a coercive force which is not substantial... | 05/24/2005 |
| 6802073 | Magneto-optical recording medium Disclosed are magneto-optical recording media including at least a reflection layer, a recording layer and a dielectric layer laminated on a substrate in this order, wherein the thickness of the dielectric layer is not less than 140 nm or wherein the dielectric laye... | 10/05/2004 |
| 6687197 | High density information recording medium and slider having rare earth metals An information recording medium comprising an information recording film formed on a base on which regular depressions and projections having Ra of 0.1 to 1.5 nm have been formed, the information recording film containing as a major component a rare earth... | 02/03/2004 |
| 6660404 | Magnetooptical recording medium including a connection layer that is non-magnetic by itself at room temperature but can be induced to exhibit magnetism when in contact with a magnetic layer A magnetooptical recording medium comprising at least a reproduction layer, an intermediate layer, a connection layer and a recording layer, wherein the reproduction layer and intermediate layer have a slant magnetic direction in a non-magnetic field, and... | 12/09/2003 |
| 6630252 | Magneto-optical recording medium comprising four magnetic layers An MO disk includes a readout layer, an intermediate layer and a recording layer each of which is made of a rare earth-transition metal amorphous material. The MO disk also includes a fourth magnetic layer formed on the recording layer and made of a rare ... | 10/07/2003 |
| 6538960 | Magneto-optical recording medium having a metal heat dispersion layer A magneto-optical recording medium, which is for recording and reproduction of information by focusing of light of a wavelength/numerical aperture of about 1000 nm or less, has a light transmitting first dielectric layer having a first surface to which li... | 03/25/2003 |
| 6496450 | Optical recording/reproducing apparatus, optical rotating recording medium, and method of designing optical recording/reproducing apparatus An optical recording/reproducing apparatus accessing a recording layer of an optical rotating recording medium using an accessing means positioned a predetermined gap away from a surface of said optical rotating recording medium and mounted with an object... | 12/17/2002 |
| 6381200 | Flash layer overcoat for first surface magneto-optical media Front surface magneto-optical (FSMO) information storage and retrieval media having improved tribological properties when used in high-density storage devices employing very small head flying heights are formed by providing an ultra-thin, protective flash... | 04/30/2002 |
| 6373792 | Reduction of a temperature in a lubricant interface A data storage system including a source of heat, a substrate, a storage layer, a lubricant layer, a flying head, and a dielectric layer is disclosed. The dielectric layer is disposed between the lubricant layer and the storage layer. The flying head is d... | 04/16/2002 |
| 6228482 | Magneto-optic recording medium with reduced demagnetizing field threshold A magneto-optic recording medium having a reduced demagnetizing field threshold incorporates a thin recording layer having a thickness of less than or equal to approximately 15 nm, and preferably less than or equal to approximately 12 nm. The recording me... | 05/08/2001 |
| 6200673 | Magneto-optical recording medium A magneto-optical recording medium having a substrate and a magnetic layer composed of at least a recording layer and a supporting layer and being capable of retrieving information by utilizing the fact that when it is irradiated with a laser beam it prod... | 03/13/2001 |
| 6177175 | Magneto-optical medium utilizing domain wall displacement Disclosed herein is a magneto-optical medium of the type that information recorded therein is reproduced by displacing a domain wall, the medium comprises a substrate, and a magnetic layer provided on the substrate, which permits domain wall displacement,... | 01/23/2001 |
| 6146752 | Magneto-optical recording medium A magneto-optical recording medium permitting satisfactory recording of information even at a small magnetic field in magnetic field modulation recording. The magneto-optical recording medium comprises a recording film formed by deposition of a recording ... | 11/14/2000 |
| 6139949 | Magneto optical recording medium A magneto-optical recording medium in which information can be overwritten by a magnetic field modulation method, is provided with a magnetic thin film satisfying an inequality t×Ms | 10/31/2000 |
| 6132862 | Magneto-optical recording medium A magneto-optical recording medium comprising a light-transmitting substrate 1 on which a dielectric layer 2, a memory layer 3 having perpendicular magnetic anisotropy, an intermediate layer 4 having in-plane magnetic anisotropy or slight perpendicular ma... | 10/17/2000 |
| 6044044 | Magneto-optical recording medium having an enlarged magnetic domain in the amplifier layer during read-out A magneto-optical recording medium comprises a substrate, and a magnetic multilayer 4 on a surface side thereof. The magnetic multilayer comprises an amplifying layer A1 and a recording layer R2 which are laminated together and are e... | 03/28/2000 |
| 5989705 | Magneto-optical recording medium A magneto-optical recording disk includes a recording layer for recording information as a mark and a reproduction layer, laminated with the recording layer, to which magnetization direction of the recording layer is transferred at high temperatures, wher... | 11/23/1999 |
| 5985436 | Magneto-optical recording medium, magneto-optical recording method, and magneto-optical recording apparatus A magneto-optical recording medium including at least a recording layer, and an auxiliary recording layer which achieves magnetostatic coupling with the recording layer. The auxiliary recording layer is in an in-plane magnetization state at temperatures l... | 11/16/1999 |
| 5958575 | Magneto-optical recording medium A magneto-optical recording medium is disclosed in which magnetic layer has a multi-layer structure consisting of an artificial lattice film constituted by a Co layer and a Pt layer and/or a Pd layer stacked together and a rare earth-transition metal laye... | 09/28/1999 |
| 5935701 | Super-resolution magneto-optic recording medium using in-plane magnetic film and information reproducing method using the medium A magneto-optic recording medium of the present invention has a transparent substrate. A reproducing layer is stacked on the substrate, and remains in an in-plane magnetic state at room temperature and is transformed into a perpendicular magnetic state at... | 08/10/1999 |
| 5932364 | Magneto-optical recording medium, method of recording and reproducing information in and from said magneto-optical recording medium and method of producing said mageto-optical recording medium A magneto-optical recording medium according to the present invention comprises a recording layer in which information is to be recorded; and a reproducing layer to and from which information recorded in the recording layer is to be transferred and read o... | 08/03/1999 |
| 5914915 | Magneto-optical disk system having an objective lens with a numerical aperture related to the thickness of the protective layer An magneto-optical disc system includes an magneto-optical disc with a light-transmitting cover and an objective lens for bundling or focusing a laser beam on a recording layer of the magneto-optical disc in order to perform recording and/or reproduction.... | 06/22/1999 |
| 5910932 | Optical disk and optical disk system with numerical aperture of objective lens related to protective layer thickness of optical disk An optical disc system uses a rewritable optical disc with a light-transmitting cover and an objective lens for bundling or focusing a light beam on a recording layer of the optical disc in order to perform recording and/or reproducing of information. The... | 06/08/1999 |
| 5901118 | Magneto-optical recording medium having a readout layer and a recording layer A magneto-optical recording medium having a substrate whereupon a transparent dielectric layer, a readout layer showing in-plane magnetization at room temperature and perpendicular magnetization with an increase in temperature, a metal film layer, a recor... | 05/04/1999 |
| 5853872 | Magneto-optical recording medium A magneto-optical recording medium having, in the following order, a substrate, a magneto-optical recording layer having a Curie temperature of not less than 220° C., and a reflective layer mainly composed of Ag and having a refractive index of not more ... | 12/29/1998 |
| 5838646 | Optical disk having a protective layer of specified thickness relative to the numerical aperture of the objective lens An optical disc system uses an optical disc with a light-transmitting cover and an objective lens for bundling or focusing a light beam on a recording layer of the optical disc in order to perform recording and/or reproducing of information. The thickness... | 11/17/1998 |
| 5814400 | Magneto-optical recording medium and method A magneto-optical recording medium comprises in combination: a magneto-optical recording layer capable of writing or erasing information by a laser beam and an external magnetic field and of reading the information by a Kerr effect; and a substrate having... | 09/29/1998 |
| 5786078 | Magneto-optical recording medium A magneto-optical recording medium comprising a transparent substrate, a first dielectric layer on the substrate, a magneto-optical recording layer on the first dielectric layer and a metal reflecting layer on the magneto-optical recording layer, opticall... | 07/28/1998 |
| 5757733 | Optical disc system having an objective lens with a numerical aperture related to the thickness of the protective layer A magneto-optical disc system includes a magneto-optical disc 40 with a light-transmitting cover layer 41, an objective lens 2 for bundling or focusing a laser beam onto a magnetic recording layer 43 of the magneto-optical disc 40 for recording informatio... | 05/26/1998 |
| 5751670 | Magneto-optical disk having variable thickness recording layer but adequate uniform reflectance value A magneto-optical disc includes a disc-shaped transparent substrate, a recording layer formed on the substrate for extending from an inner diameter to nearly an outer most diameter, and an outer peripheral portion of the recording layer having a thickness... | 05/12/1998 |
| 5700567 | Magneto-optical recording medium In a magneto-optical recording medium comprising a first dielectric layer, a recording layer, a second dielectric layer, and a metal reflective layer stacked on a substrate, the second dielectric layer is formed of a mixture of a rare earth element oxide,... | 12/23/1997 |
| 5667887 | Magneto-optical media The present invention relates to a magneto-optical media. More particularly, the present invention relates to a device for assuring a high S/N ratio by controlling the optical phase difference of the media by optimizing the film structure of a multi-layer... | 09/16/1997 |
| 5667862 | Magneto-optical disk A magneto-optical disk having a four-layer structure formed of a first protective dielectric layer, a recording magnetic layer, a second protective dielectric layer and a reflective metal layer is disclosed. The constraints for the film thicknesses of the... | 09/16/1997 |
