Kojima, Kyoto
Hirofumi Kojima, Kyoto JP
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20090196540 | DYNAMIC FLUID PRESSURE BEARING, SPINDLE MOTOR, DISK DRIVE APPARATUS AND METHOD FOR MANUFACTURING THE DYNAMIC FLUID PRESSURE BEARING - A fluid dynamic pressure bearing includes a shaft arranged along a central axis, an annular member fixed to the shaft, a sleeve, a lubricant, and a lubricating film. A stepped surface is provided on the outer circumferential surface of the shaft. The annular member preferably includes a lower surface extending radially with respect to the central axis and arranged to make contact with the stepped surface in the inner edge portion of the lower surface. The sleeve preferably includes an upper surface axially opposed to the lower surface of the annular member. The lubricant is provided between the shaft and the sleeve and between the annular member and the sleeve. The lubricating film is provided on the lower surface of the annular member at least over a region lying radially outwardly of the inner edge portion of the lower surface. | 08-06-2009 |
20120092788 | FLUID DYNAMIC BEARING MECHANISM INCLUDING COMMUNICATING CHANNEL, SPINDLE MOTOR, AND DISK DRIVE APPARATUS - A fluid dynamic bearing mechanism includes a stationary bearing portion including a sleeve portion, and a rotating bearing portion including an outer rotating portion. A lubricating oil is arranged between the stationary and rotating bearing portions. A first dynamic pressure groove array is arranged in an upper surface of the sleeve portion or a lower surface of the outer rotating portion. A second dynamic pressure groove array is arranged in a surface of the outer rotating portion or a surface of the stationary bearing portion in a region between the first array and a liquid surface. An end of the second array closer to the liquid surface is arranged radially inward of an opposite end of the second array. An upper end opening of a communicating channel defined in the sleeve portion is arranged radially outward of a radially inner end of the first array. | 04-19-2012 |
Katsunori Kojima, Kyoto JP
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20120295156 | NON-AQUEOUS SECONDARY BATTERY - The non-aqueous secondary battery of the present invention comprises a positive electrode containing a lithium-containing composite oxide as an active material, a negative electrode, a separator, and a non-aqueous electrolyte. The non-aqueous electrolyte contains polyvalent organic lithium salt, and the content of the polyvalent organic lithium salt is 0.001 parts by mass or more and 1 part by mass or less with respect to 100 parts by mass of all of the components of the non-aqueous electrolyte other than the polyvalent organic lithium salt. | 11-22-2012 |
20120301784 | NONAQUEOUS SECONDARY BATTERY - The nonaqueous secondary battery of the present invention comprises a positive electrode having a positive electrode mixture layer containing a lithium-containing composite oxide as a positive electrode active material, a negative electrode, a separator, and a nonaqueous electrolyte. The surface of the positive electrode active material or the positive electrode mixture layer is coated with polyvalent organic metal salt, particularly preferably with fluorine-containing polyvalent organic lithium salt. | 11-29-2012 |
Masatoshi Kojima, Kyoto JP
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20090047731 | CELLULAR ELECTROPHYSIOLOGICAL MEASUREMENT DEVICE AND METHOD FOR MANUFACTURING THE SAME - A cellular electrophysiological measurement device includes a thin plate and a frame. The thin plate has a first surface with a depression and a second surface with a through-hole. The frame is in contact with an outer periphery on the second surface of thin plate. The thin plate has a laminated structure of at least two layers including a first material layer on the first surface and a second material layer on the second surface. The frame is formed of a third material layer. The structure allows the cellular electrophysiological measurement device to be not so vulnerable to breakage of thin plate and other damages, thereby having high production yield. | 02-19-2009 |
Mitsuo Kojima, Kyoto JP
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20100102387 | SEMICODUCTOR DEVICE - An inventive semiconductor device includes a semiconductor layer, a source region provided in a surface layer portion of the semiconductor layer, a drain region provided in the surface of the semiconductor layer in spaced relation from the source region, a gate insulation film provided in opposed relation to a portion of the surface of the semiconductor layer present between the source region and the drain region, a gate electrode provided on the gate insulation film, and a drain-gate isolation portion provided between the drain region and the gate insulation film for isolating the drain region and the gate insulation film from each other in non-contact relation. | 04-29-2010 |
20130292765 | SEMICONDUCTOR DEVICE HAVING A DRAIN-GATE ISOLATION PORTION - An inventive semiconductor device includes a semiconductor layer, a source region provided in a surface layer portion of the semiconductor layer, a drain region provided in the surface of the semiconductor layer in spaced relation from the source region, a gate insulation film provided in opposed relation to a portion of the surface of the semiconductor layer present between the source region and the drain region, a gate electrode provided on the gate insulation film, and a drain-gate isolation portion provided between the drain region and the gate insulation film for isolating the drain region and the gate insulation film from each other in non-contact relation. | 11-07-2013 |
Tsutomu Kojima, Kyoto JP
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20140238953 | ETCHING AGENT FOR COPPER OR COPPER ALLOY - Object is to provide an etching solution which generates less foam and can etch copper or copper alloy at high selectivity when used in a step of etching copper or copper alloy in an electronic substrate having both of copper or copper alloy and nickel. | 08-28-2014 |