Patent application number | Description | Published |
20100011814 | MATERIAL FOR INFORMATION RECORDING MEDIUM SUBSTRATE, INFORMATION RECORDING MEDIUM SUBSTRATE, INFORMATION RECORDING MEDIUM, AND METHOD FOR MANUFACTURING THEM - The present invention has for its objects to provide a method for manufacturing a disklike glass material for the mass production of information recording media substrate-use materials of constant sheet thickness, to provide a method for manufacturing an information recording medium-use substrate from the material thus manufactured, and to provide a method for manufacturing an information recording medium. The provided is a method for manufacturing a disklike glass material comprising the successive molding of multiple pieces of disklike glass material from glass melt. Being suppressed variation over time in the concentration of infrared radiation-absorbing ions contained in the glass melt being molded into said pieces of disklike glass material so that the variation in the sheet thickness of said multiple pieces of disklike glass material falls within a range of ±15 percent of a reference value. The reference value being the median between the maximum value and the minimum value of the sheet thickness of 1,000 pieces of said glass material. In the course of molding multiple pieces of disklike glass material comprised of glass containing 0.1 to 100 ppm of infrared radiation-absorbing ions, variation over time in the concentration of the infrared radiation-absorbing ions contained in the glass melt being molded into said pieces of disklike glass material is suppressed to suppress variation in the sheet thickness of said multiple pieces of sheetlike glass material. | 01-21-2010 |
20100167091 | GLASS FOR USE IN SUBSTRATE FOR INFORMATION RECORDING MEDIUM, SUBSTRATE FOR INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING MEDIUM, AND THEIR MANUFACTURING METHOD - According to one aspect of the present invention, provided is glass for use in substrate for information recording medium, which comprises, denoted as molar percentages, a total of 70 to 85 percent of SiO | 07-01-2010 |
20110086241 | GLASS FOR MAGNETIC RECORDING MEDIA SUBSTRATES, MAGNETIC RECORDING MEDIA SUBSTRATES, MAGNETIC RECORDING MEDIA AND METHOD FOR PREPARATION THEREOF - The provided are a glass for a magnetic recording medium substrate permitting the realization of a magnetic recording medium substrate affording good chemical durability and having an extremely flat surface, a magnetic recording medium substrate comprised of this glass, a magnetic recording medium equipped with this substrate, and methods of manufacturing the same. Glasses for a magnetic recording medium substrate are, glass I comprised of an oxide glass, comprising, denoted as mass percentages:
| 04-14-2011 |
20110123832 | GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM SUBSTRATE AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to glass for a magnetic recording medium substrate, which comprises, denoted as molar percentages, 50 to 75 percent of SiO | 05-26-2011 |
20120021892 | GLASS FOR USE AS SUBSTRATE FOR INFORMATION RECORDING MEDIUM, SUBSTRATE FOR INFORMATION RECORDING MEDIUM, INFORMATION RECORDING MEDIUM, AND THEIR PRODUCTION METHODS - According to one aspect of the present invention, provided is glass for use in substrate for information recording medium, which comprises, denoted as molar percentages, a total of 70 to 85 percent of SiO | 01-26-2012 |
20120107647 | GLASS SUBSTRATE FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a glass substrate for a magnetic recording medium, which is comprised of glass comprising, denoted as molar percentages, 56 to 75 percent of SiO | 05-03-2012 |
Patent application number | Description | Published |
20080206494 | Glass substrate for display and display - A glass substrate for a display, which is formed of a glass having a light weight and having high refinability with decreasing environmental burdens, the glass comprising, by mass %, 50 to 70% of SiO | 08-28-2008 |
20080231972 | ON-VEHICLE CAMERA LENS GLASS MATERIAL AND ON-VEHICLE CAMERA LENS - An on-vehicle camera lens glass material satisfies at least one of conditions in which a measurement result in water resistance based on a powder method prescribed by Japanese Optical Glass Industrial Standard is 1 | 09-25-2008 |
20090176641 | OPTICAL GLASS, GLASS MOLDED BODY, OPTICAL DEVICE AND THEIR PRODUCTION METHODS - An optical class comprising, by mass %, 12 to 30% of total of B | 07-09-2009 |
20100298112 | Glass substrate for display and display - A glass substrate for a display, which is formed of a glass having a light weight and having high refinability with decreasing environmental burdens, the glass comprising, by mass %, 50 to 70% of SiO | 11-25-2010 |
20110077142 | OPTICAL GLASS, PRESS-MOLDING GLASS MATERIAL, OPTICAL ELEMENT AND PROCESS FOR PRODUCING THE SAME - A high-refractivity low-dispersion optical glass of which the Ta | 03-31-2011 |
20120302424 | OPTICAL GLASS, GLASS MOLDED BODY, OPTICAL DEVICE AND THEIR PRODUCTION METHODS - An optical glass comprising, by mass %, 12 to 30% of total of B | 11-29-2012 |
20120328907 | GLASS FOR USE AS SUBSTRATE FOR INFORMATION RECORDING MEDIUM, SUBSTRATE FOR INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING MEDIUM, AND THEIR PRODUCTION METHODS - According to one aspect of the present invention, provided is glass for use in substrate for information recording medium, which comprises, denoted as molar percentages, a total of 70 to 85 percent of SiO | 12-27-2012 |
20140031192 | GLASS SUBSTRATE FOR DISPLAY AND DISPLAY - A glass substrate for a display, which is formed of a glass having a light weight and having high refinability with decreasing environmental burdens, the glass comprising, by mass %, 50 to 70% of SiO | 01-30-2014 |
20140302346 | GLASS FOR USE AS SUBSTRATE FOR INFORMATION RECORDING MEDIUM, SUBSTRATEFOR INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING MEDIUM, ANDTHEIR PRODUCTION METHODS - According to one aspect of the present invention, provided is glass for use in substrate for information recording medium, which comprises, denoted as molar percentages, a total of 70 to 85 percent of SiO | 10-09-2014 |