Patent application number | Description | Published |
20090122448 | GLASS SUBSTRATE FOR MAGNETIC DISK APPARATUS - A main surface of a glass substrate for a magnetic disk is disk-shaped and has a ski jump on an outer peripheral end portion of the main surface opposing a magnetic head slider to be loaded. A rate of change of angles of tangents to a slope of the ski jump in a radial direction in a range between an inner circumferential side and a transition point on the slope is equal to or less than 10/W μrad/mm where W is a width of the magnetic head slider. | 05-14-2009 |
20090142626 | GLASS SUBSTRATE FOR MAGNETIC DISK AND MAGNETIC DISK APPARATUS - A glass substrate for a magnetic disk satisfies Ra | 06-04-2009 |
20090145168 | OPTICAL FIBER MANUFACTURING METHOD AND OPTICAL FIBER MANUFACTURING APPARATUS - A pressure detecting unit detects a pressure of supplying a resin to at least a hole for forming an innermost resin layer on an optical fiber from among a plurality of successive holes in a coating die. A control unit controls a discharge amount of a constant-rate pump that supplies the resin to the coating die in such a manner that a detected resin pressure becomes a predetermined value, and controls a temperature of the optical fiber so that the temperature of the optical fiber becomes a predetermined temperature in accordance with a variation of the discharge amount of the constant-rate pump. | 06-11-2009 |
20090239101 | GLASS SUBSTRATE AND THERMAL-ASSISTED MAGNETIC RECORDING DISK - A plurality of recording magnetization portions is arranged in a concentric manner around a center of a glass substrate. A plurality of non-magnetization portion having a thermal conductivity lower than that of the recording magnetization portions is formed each between adjacent recording magnetization portions along a circumferential direction on a main surface of the glass substrate. A mean squared roughness of a surface of an area where each of the non-magnetization portions is formed is equal to or smaller than 1 nanometer. | 09-24-2009 |
20090241604 | OPTICAL FIBER DRAWING METHODS AND DRAWING FURNACES - Drawing methods and drawing furnaces for drawing an optical fiber with small non-circularity by simple drawing system are provided. An optical fiber preform is received into a muffle tube and heated by a primary heater placed to surround the muffle tube. The optical fiber preform is heated such that a starting position of a meniscus portion is higher in its position than the top of the primary heater, wherein the meniscus portion is created at the bottom portion of the optical fiber preform. | 10-01-2009 |
20100212364 | OPTICAL FIBER MANUFACTURING METHODS - An optical fiber manufacturing method, which recycles cooling gas with a simple system (less modification from a conventional device) is provided. The method comprises the steps of heating and melting an optical fiber preform, cooling the glass fiber obtained from the preform using a cooling device, and coating the cooled glass fiber with a coating material. During the cooling step, cooling gas is supplied from the bottom portion of the cooling device | 08-26-2010 |
20110177257 | METHOD OF MANUFACTURING OPTICAL FIBER - A method of manufacturing an optical fiber, comprises applying a UV cured resin to an outer circumference of a running glass optical fiber, forming an accompanying flow composed of an inert gas near a surface of the resin by passing the glass optical fiber immediately after having the resin being applied through an atmosphere of the inert gas, and forming a coating by irradiating the resin coated with the accompanying flow with ultraviolet ray to cure the resin while the glass optical fiber accompanied by the accompanying flow is passed through a UV transmission tube to which a gas containing oxygen is supplied. | 07-21-2011 |
20120034728 | LINEAR SEMICONDUCTOR SUBSTRATE, AND DEVICE, DEVICE ARRAY AND MODULE, USING THE SAME - The linear semiconductor substrate | 02-09-2012 |
20120118018 | OPTICAL FIBER PREFORM, METHOD OF MANUFACTURING OPTICAL FIBER PREFORM, AND METHOD OF MANUFACTURING OPTICAL FIBER - A porous layer is formed by depositing a silica glass particle around a core rod. The porous layer is dehydrated. The dehydrated porous layer is sintered under a decreased pressure until the dehydrated porous layer becomes a translucent glass layer containing a closed pore. The translucent glass layer is vitrified under an ambient atmosphere including an inert gas other than a helium gas. | 05-17-2012 |
20120192594 | OPTICAL FIBER DRAWING METHODS AND DRAWING FURNACES - Drawing methods and drawing furnaces for drawing an optical fiber with small non-circularity by simple drawing system are provided. An optical fiber preform is received into a muffle tube and heated by a primary heater placed to surround the muffle tube. The optical fiber preform is heated such that a starting position of a meniscus portion is higher in its position than the top of the primary heater, wherein the meniscus portion is created at the bottom portion of the optical fiber preform. | 08-02-2012 |
20120301610 | METHOD OF PRODUCING GLASS PREFORM AND APPARATUS FOR PRODUCING THE SAME - A method of producing a glass preform by depositing silica powder that contains silica particles on a starting material includes a transferring step, a disaggregating step, and a depositing step. The transferring step includes transferring the silica powder. The disaggregating step includes disaggregating and dispersing agglomerates of the silica particles contained in the silica powder while being transferred in the transferring step. The depositing step includes depositing the silica powder, which is transferred and is obtained by disaggregating and dispersing the agglomerates of the silica particles, on the starting material. | 11-29-2012 |
20140050450 | OPTICAL FIBER PREFORM, METHOD OF MANUFACTURING OPTICAL FIBER PREFORM, AND METHOD OF MANUFACTURING OPTICAL FIBER - A porous layer is formed by depositing a silica glass particle around a core rod. The porous layer is dehydrated. The dehydrated porous layer is sintered under a decreased pressure until the dehydrated porous layer becomes a translucent glass layer containing a closed pore. The translucent glass layer is vitrified under an ambient atmosphere including an inert gas other than a helium gas. | 02-20-2014 |