Sakawaki
Akira Sakawaki, Chiba JP
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20090180213 | MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCTION THEREOF, AND MAGNETIC RECORDING AND REPRODUCING DRIVE - A discrete track-type magnetic recording medium ( | 07-16-2009 |
20090323219 | MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCTION THEREOF AND MAGNETIC RECORDING AND REPRODUCING DEVICE - A method for the production of a magnetic recording medium ( | 12-31-2009 |
20100284108 | PROCESS FOR PRODUCING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - A method for producing a magnetic recording medium having a magnetically partitioned magnetic recording pattern, comprising a step of forming a magnetic layer contains 0.5-6 atomic % of an oxide on a non-magnetic substrate; and a step of exposing regions of the magnetic layer, which magnetically partition the magnetic recording pattern, to a reactive plasma or reactive ion. The magnetic layer preferably has a non-granular structure, and in-plane orientated. After the step of exposure of the magnetic layer to a reactive plasma or reactive ion, a surface at least in said regions of magnetic layer having been exposed to the reactive plasma or reactive ion is preferably irradiated with an inert gas. Thus, a magnetic recording medium having a magnetic recording pattern with a high precision, and having high electromagnetic conversion characteristics and high recording density can be produced with an enhanced productivity. | 11-11-2010 |
20140362472 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS - A perpendicular magnetic recording medium includes a nonmagnetic substrate, an underlayer provided above the nonmagnetic substrate, and a perpendicular recording layer provided above the underlayer. The perpendicular recording layer includes a first magnetic layer including Co and Pt and having a granular structure, and a second magnetic layer having magnetic and ferroelectric properties. | 12-11-2014 |
Akira Sakawaki, Ichihara JP
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20100271730 | METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING APPARATUS - A method for producing a magnetic recording medium having a magnetically partitioned magnetic recording pattern on a surface of a nonmagnetic substrate, which comprises the following steps. Step (A) of forming a magnetic layer on a non-magnetic substrate, step (B) of forming a carbon layer on the magnetic layer, step (C) of forming a resist layer on the carbon layer, step (D) of forming a negative pattern of magnetic recording pattern on the resist layer, step (E) of removing the portions of resist layer and carbon layer in regions corresponding to the negative pattern, step (F) of removing at least a surface layer portion of the magnetic layer in the regions corresponding to the negative pattern, and optional step (G) of removing the residual resist layer and carbon layer. The produced magnetic recording medium has a recording/reproducing property equal to or better than conventional ones and exhibits a high recording density. | 10-28-2010 |
Akira Sakawaki, Kisarazu-Shi JP
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20130188278 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING DEVICE - A method of manufacturing a magnetic recording medium is provided. The method includes: forming a magnetic layer | 07-25-2013 |
20150016236 | MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING AND REPRODUCING APPARATUS, MAGNETIC RECORDING METHOD AND MAGNETIC REPRODUCING METHOD - Provided is a magnetic recording medium including a structure in which at least a soft magnetic underlayer, a non-magnetic intermediate layer, and a magnetic recording layer are sequentially laminated on a non-magnetic substrate, wherein the magnetic recording layer includes a first magnetic layer, a non-magnetic layer, and a second magnetic layer in order from the non-magnetic substrate side, has a structure in which the first magnetic layer and the second magnetic layer are magnetically separated from each other with the non-magnetic layer interposed therebetween, and consists of a plurality of patterns which are magnetically separated from each other, and the coercive force Hc of the second magnetic layer is larger than that of the first magnetic layer, and the coercive force Hc of the second magnetic layer is smaller than that of the first magnetic layer temporarily when the second magnetic layer is heated. | 01-15-2015 |
Atsushi Sakawaki, Kusatsu-Shi JP
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20140234139 | MAGNETIC BEARING AND COMPRESSOR USING THE SAME - A stator is provided which exerts a combined electromagnetic force of a plurality of electromagnets on a drive shaft having a fluctuating load. A controller is provided which controls a current difference between a first coil current passed through a coil of the electromagnet generating an electromagnetic force in a direction opposite to that of the load and a second coil current passed through a coil of the electromagnet generating an electromagnetic force in the same direction as that of the load to perform a position control on the drive shaft. The controller adjusts the second coil current to reduce an average value of the second coil current. | 08-21-2014 |
Atsushi Sakawaki, Shiga JP
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20140363321 | MAGNETIC BEARING DEVICE AND COMPRESSOR - A magnetic bearing body supports a rotating shaft using a combined electromagnetic force of a pair of control electromagnets without contact. A controller detects a control index value based on a first coil current passed through a coil of a first control electromagnet of the pair of control electromagnets which generates an electromagnetic force in the same direction as that of a load exerted on the rotating shaft, the control index value being an index of the degree of margin for error in control depending on a value of the first coil current. And the controller controls a middle value of a pair of coil currents passed through the respective corresponding coils of the pair of control electromagnets so that the control index value approaches a predetermined target index value. | 12-11-2014 |
Yoshihiko Sakawaki, Kanagawa JP
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20130219261 | APPARATUS, INFORMATION PROCESSING SYSTEM, AND INFORMATION PROCESSING METHOD - A disclosed apparatus includes a display control unit that causes a screen to be displayed by a display unit indicated by screen information included in a Web page, and a call unit that calls a method corresponding to a character string designated by an argument of a first script included in the Web page, the method being included in a program causing a function to be performed with the apparatus. | 08-22-2013 |
20140281914 | INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING DEVICE, AND INFORMATION PROCESSING METHOD - An information processing system includes a device, and a computer configured to provide display data to the device. The information processing system includes a storage unit configured to store setting information; an update unit configured to update the setting information stored in the storage unit based on setting information included in the display data; and a display configured to display the display data, based on the setting information stored in the storage unit that is updated by the update unit. | 09-18-2014 |