Patent application number | Description | Published |
20100126408 | SINGLE CRYSTAL GROWTH METHOD AND SINGLE CRYSTAL PULLING APPARATUS - The present invention resides in a silicon single crystal growth method of pulling up and growing a single crystal from a melt of a silicon raw material in a quartz crucible based on a Czochralski method, wherein the method comprises the steps of: applying a DC voltage between an outer wall of the quartz crucible acts as a positive electrode and a pulling wire or pulling shaft for pulling up the silicon single crystal acts as a negative electrode; and fixing an electric current flowing through the silicon single crystal over a period of time for pulling up the single crystal, to grow the single crystal; as well as a pulling apparatus therefor. This allows for provision of the silicon single crystal growth method and the pulling apparatus therefor, capable of generating appropriately crystallized layers, i.e., devitrification at an inner wall surface of a quartz crucible during a silicon single crystal growth process, and capable of simultaneously controlling a Li concentration of the silicon single crystal, to prevent generating dislocations in the single crystal growth process to thereby improve a yield and productivity of single crystal, while simultaneously restricting variances of thicknesses of those oxide films of sliced wafers which oxide films are to be formed by subsequent thermal oxidation treatments. | 05-27-2010 |
20110017125 | SINGLE CRYSTAL GROWTH METHOD AND SINGLE CRYSTAL PULLING APPARATUS - A silicon single crystal growth method of pulling up and growing a single crystal from a melt of a silicon raw material melted in a quartz crucible based on a Czochralski method, the method comprising the steps of: applying a direct current voltage in such a manner that an outer wall of the quartz crucible acts as a positive electrode and an electrode immersed into the melt of the silicon raw material acts as a negative electrode, the immersed electrode being placed separately from a pulling member for pulling the single crystal; and growing the single crystal with the pulling member while passing an electric current through the electrode, and a pulling apparatus thereof. | 01-27-2011 |
20110146564 | METHOD FOR DETECTING DIAMETER OF SINGLE CRYSTAL, SINGLE-CRYSTAL MANUFACTURING METHOD BY USING THE SAME AND SINGLE-CRYSTAL MANUFACTURING APPARATUS - A method for detecting a diameter of a single crystal at the time of pulling the single crystal from a silicon melt contained in a crucible according to the Czochralski method, the method including at least: using two cameras placed equidistant from each other as a target diameter upon forming a straight-body portion of the single crystal and face both ends of the diameter of the single crystal in a growth point of the single crystal respectively, to separately capture both of the ends of the growth point of the single crystal from an outside of a furnace, the growth point being a contact point between the single crystal and a melt surface; and detecting the diameter of the single crystal on the basis of the captured images. As a result, diameter detection precision is improved. | 06-23-2011 |
20130032083 | SINGLE-CRYSTAL MANUFACTURING APPARATUS AND METHOD FOR MANUFACTURING SINGLE CRYSTAL - The present invention provides a single-crystal manufacturing apparatus comprising a chamber that accommodates a crucible containing a raw material melt; a pulling mechanism for pulling a single crystal; a heater for heating the raw material melt, the heater being movable upwardly and downwardly; and a temperature measurement means for measuring temperature of the heater, wherein the temperature measurement means is movable upwardly and downwardly in response to the upward and downward movement of the heater. The present invention provides a single-crystal manufacturing apparatus and a method for manufacturing a single crystal that can stably measure the heater temperature regardless of a change in operation conditions and hence stably control the heater temperature and the heater output, resulting in a stable operation. | 02-07-2013 |
20130125810 | APPARATUS AND METHOD FOR MANUFACTURING SEMICONDUCTOR SINGLE CRYSTAL - The present invention is a semiconductor single crystal manufacturing apparatus including, within a growth furnace main body, a crucible, and a heater disposed around the crucible, wherein a heat insulating cylinder is disposed around the heater within the growth furnace main body, the heat insulating cylinder includes a step portion dividing the heat insulating cylinder into the upper part and the lower part at the inside surface thereof, the inner diameter of the lower part is larger than the inner diameter of the upper part, a heat insulating plate is disposed below the heater and on the inside of the lower part of the heat insulating cylinder within the growth furnace main body, and the diameter of the heat insulating plate is larger than the inner diameter of the upper part of the heat insulating cylinder and is smaller than the inner diameter of the lower part. | 05-23-2013 |
20130276693 | SINGLE CRYSTAL PRODUCTION APPARATUS AND SINGLE CRYSTAL PRODUCTION METHOD - A single crystal production apparatus using the Czochralski method, includes: a crucible for holding raw material melt; a pedestal that supports the crucible and can be moved upward and downward; a crucible rotating shaft for rotating the crucible via the pedestal; and a melt receiver that is disposed below the crucible and provided with a center sleeve surrounding the pedestal, wherein, on the outer periphery of the pedestal, two or more grooves for preventing the raw material melt leaking from the crucible from dripping are provided. The single crystal production apparatus and single crystal production method can reliably prevent melt from reaching a metal portion below the pedestal even when the raw material melt in the crucible flows to the outside of the crucible in an unexpected accident or the like and runs down along the pedestal and thereby prevent damage to the apparatus and the occurrence of an accident. | 10-24-2013 |
20140238292 | METHOD FOR MANUFACTURING SINGLE CRYSTAL - According to the present invention, there is provided a method for manufacturing single crystal based on a Czochralski method, including: analyzing Ni concentration in at least one of graphite components used in a furnace in which the single crystal is manufactured; and manufacturing the single crystal using the at least one of the graphite components when the analyzed Ni concentration is 30 ppb or less. As a result, in manufacture of the single crystal based on the Czochralski method, the method that enables manufacturing high-quality single crystal in which a reduction in LT (Life Time) or an LPD (Light Point Defect) abnormality does not occur can be provided. | 08-28-2014 |
Patent application number | Description | Published |
20100098022 | METHOD AND APPARATUS FOR ROUTING A PACKET IN MOBILE IP SYSTEM - The invention relates to a method, apparatus and system to preferably route a packet via an IP network, and more particularly to a routing entity having a buffer storing packets from/to a mobile entity. An initiation unit ( | 04-22-2010 |
20100182960 | VRM SELECTION - There are provided a method, a network system, and a router capable of decreasing the chance of VRM or VLM changes so as to reduce signaling, and consequently contributing to better scalability. The method is applied to mobility management used in an IP-based network system, which contains a plurality of access routers (AR), location managers (LM) and routing managers (RM), through which a mobile node (MN) transmits and receives information. According to the method, a visited routing manager (VRM) where the MN is currently located monitors the MN, an AR currently communicating with the MN discriminates whether or not the MN is moving out of its connectivity range, and the VRM discriminates whether or not the MN is moving out of its control range. Then, the method switches mobility management over from the current AR to a new AR in accordance with the discrimination results, and switches mobility management over from the current VRM to a new VRM in accordance with the discrimination result. | 07-22-2010 |
20100322245 | ROUTING MANAGER HIERARCHY - There are provided a scalable method for mobility management applied to an IP-based network system including a plurality of routers and a plurality of servers, a part of which serve as a home routing manager (HRM), a part of which serve as local routing managers (LRM) for individual mobile nodes. The method at least comprises the steps of sending a first query about a routing address of a destination mobile node toward the HRM, based on an activation notification (AN) from an ingress access router (AR) of the plurality of routers, triggered by a source mobile mode, from an LRM receiving the activation notification; relaying the first query via one or more intermediate routing managers (IRM) closer to the HRM until the first query reaches the HRM; and in response to the first query, sending the routing address of the destination mobile node back to the ingress access router through the relay path from the HRM. | 12-23-2010 |
Patent application number | Description | Published |
20090240656 | SEARCH SYSTEM OF COMMUNICATIONS DEVICE - A communications system is provided which can search for information about a communications device that is not registered in a network by designating time. The search system, which includes a plurality of communications devices, gateways and an entity management server, can execute a search method. The entity management server stores in a storage device the identification information of the communications device sent from the gateways with establishing correspondence with notification time. The entity management server receives from a mobile terminal the identification information of the communications device and designated time. The entity management server searches for the identification information stored in the storage device at the designated time, and identifies the location information of the gateways corresponding to the identification information included in the search request. | 09-24-2009 |
20120082086 | ROAMING SYSTEM, HLR, AND PACKET COMMUNICATION RESTRICTING METHOD - A communication restriction is performed in an appropriate manner for a mobile station (subscriber) that has roamed out of a communication operator's network where subscriber information is registered into another one. In a roaming system including an HLR | 04-05-2012 |
20120105707 | Imaging device, imaging method, and program - An imaging device includes a detector that repeatedly carries out a series of operation of generating an evaluation value to evaluate the degree of focusing of a position after driving of a lens toward one end part in the drive range of the lens, and detects the evaluation value of a position that is closer to the end part than the position of the evaluation value of the highest degree of focusing and is immediately adjacent or adjacent across a predetermined number of positions to the position of the evaluation value of the highest degree of focusing. The imaging device further includes a drive controller that makes the series of operation be repeatedly carried out toward the other end part in the drive range of the lens, and drives the lens to a position of a degree of focusing not smaller than the detected evaluation value. | 05-03-2012 |
20120114320 | Image apparatus, imaging method and program - An imaging apparatus includes: a supplying section configured to supply a driving command for driving at least a portion of a lens in a specific direction to a focal-point adjustment device for changing or adjusting a focal-point distance in accordance with power supplied to the focal-point adjustment device; and an inference section configured to infer a position, at which the lens is located after being driven in accordance with the driving command in the specific direction, on the basis of the driving command supplied to the focal-point adjustment device and on the basis of error information serving as information on an error of a driving quantity by which the lens driven by the focal-point adjustment device is moved. | 05-10-2012 |
Patent application number | Description | Published |
20090003902 | IMAGE HEATING APPARATUS AND PRESSURE ROLLER USED FOR IMAGE HEATING APPARATUS - A pressure roller forming a nip portion for contacting to a heating member to pinch and convey and heat recording material includes: a core metal and an elastic layer containing filler, the elastic layer containing the filler including thermal conductive filler with length of not less than 0.05 mm and not more than 1 mm and with thermal conductivity λ | 01-01-2009 |
20090116886 | IMAGE HEATING APPARATUS AND PRESSURE ROLLER THEREIN - A pressure member contacts with a heating member | 05-07-2009 |
20110217092 | IMAGE HEATING APPARATUS, PRESSURE ROLLER TO BE USED IN THE IMAGE HEATING APPARATUS, AND MANUFACTURING METHOD FOR THE PRESSURE ROLLER - The image heating apparatus includes a rubber layer and a resin tube layer on a metal core. The rubber layer includes a solid rubber layer having a thermal conductivity in a thickness direction of 0.16 W/(m·K) or more and 0.40 W/(m·K) or less, and a self-bonded silicone rubber layer that contains a filler of 5 vol % or more and 40 vol % or less, and has a thermal conductivity in an axial direction of 2.5 W/(m·K) or more and a thickness of 0.5 mm or more and 5.0 mm or less, the filler having a length of 0.05 mm or more and 1 mm or less and a thermal conductivity in a length direction of 500 W/(m·K) or more, so that a pressure roller to moderate temperature rise in a non-sheet feeding area when a small sized recording material has undergone sheet feeding can be easily manufactured. | 09-08-2011 |
20110237413 | IMAGE HEATING APPARATUS AND PRESSURE ROLLER USED FOR IMAGE HEATING APPARATUS - A pressure roller forming a nip portion for contacting to a heating member to pinch and convey and heat recording material includes: a core metal and an elastic layer containing filler, the elastic layer containing the filler including thermal conductive filler with length of not less than 0.05 mm and not more than 1 mm and with thermal conductivity λ | 09-29-2011 |
20120121284 | FIXING APPARATUS - A fixing apparatus is capable of executing a first fixing mode for performing fixing processing at a first pressing force and a second fixing mode for performing fixing processing at a second pressing force that is lower than the first pressing force. When a pressing force applied to a fixing nip portion is set to the second pressing force, all of a first heating member pattern on a heater is contained within a contact region between a belt member and the heater, and at least a portion of a second heating member pattern is disposed outside the contact region, so that consumed power is reduced. | 05-17-2012 |
20120141173 | SUSPENDED PARTICLE COLLECTING MEMBER AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A collecting member that collects suspended particles vaporized from wax includes a flow path and a space, where gas passes along the flow path. The space is connected to the flow path through an opening formed in the flow path. The space extends upstream with respect to a direction of travel of the gas that passes along the flow path. By virtue of this structure, dew condensation in a fixing unit is suppressed while efficiently collecting the suspended particles. | 06-07-2012 |
20120257913 | IMAGE HEATING APPARATUS AND PRESSURE ROLLER USED FOR IMAGE HEATING APPARATUS - A pressure roller forms a nip for contacting a heating member to pinch and convey a heat recording material. The roller includes a core metal and an elastic layer containing filler. The elastic layer containing the filler includes thermal conductive filler with a length of not less than 0.05 mm and not more than 1 mm with a thermal conductivity λ | 10-11-2012 |
20140093268 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a fixing portion for fixing an image, formed on a recording material, on the recording material, wherein the fixing portion includes a heater for generating heat by electric power supplied from a commercial power source; a power source portion for supplying the electric power to a load except the heater, wherein the power source and the heater are connected with the commercial power source in parallel; a suppliable electric power calculating portion for calculating suppliable electric power suppliable to the heater; and a temperature setting portion for setting, depending on the suppliable electric power calculated by the calculating portion, a control target temperature of the fixing portion in an operation in a stand-by mode in which the image forming apparatus awaits a print instruction. | 04-03-2014 |
20140147162 | SUSPENDED PARTICLE COLLECTING MEMBER AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A collecting member that collects suspended particles vaporized from wax includes a flow path and a space, where gas passes along the flow path. The space is connected to the flow path through an opening formed in the flow path. The space extends upstream with respect to a direction of travel of the gas that passes along the flow path. By virtue of this structure, dew condensation in a fixing unit is suppressed while efficiently collecting the suspended particles. | 05-29-2014 |