Patent application number | Description | Published |
20090013942 | Cooling Structure for a Work Vehicle - A cooling structure for a working vehicle with a transmission disposed rearwardly and downwardly of a driver's seat and having a hydrostatic transmission, and an air-cooled engine disposed rearwardly of the transmission. The cooling structure comprising a fan for cooling the engine and a fan for cooling the transmission mounted on a rotary shaft operatively connecting the transmission with an output shaft of the air-cooled engine, the fans being configured such that air flows generated by the fans move from adjacent the transmission toward the engine; an oil cooler for cooling fluid supplied to the hydrostatic transmission, the oil cooler being disposed between the fan for cooling the engine and the fan for cooling the transmission, and disposed to face each of the fans; and an air guiding plate disposed at a position higher than the oil cooler for guiding air to regions of the fans. | 01-15-2009 |
20100242924 | Fuel System for Traveling Vehicle - Disclosed is a fuel system for a traveling vehicle having an engine mounted on a vehicle body and a ROPS extending upward from the vehicle body. The fuel system includes a fuel tank accommodating an amount of fuel, a canister, an evaporating hose including a first evaporating hose portion and a second evaporating hose portion for sending fuel vapor generated inside the fuel tank to the canister. The first evaporating hose portion is connected to the fuel tank and extending upward from the fuel tank along a vertical post of the ROPS. The second evaporating hose portion extends downward along a vertical post of the ROPS and is connected to the canister. | 09-30-2010 |
20110232250 | Mower Unit Suspended from a Grass Mower - A mower unit is disclosed, including a mower deck mounting therein in parallel layout first, second and third rotary blades rotatably driven about vertical axes and a washing device. The mower deck includes a top wall, side walls and first, second and third auxiliary side walls for evacuation, the auxiliary side walls having shapes along at least a machine body rear portion of the rotary path of each rotary blade. The washing device includes a single water supplying unit disposed upwardly of the top wall for supplying washing water and first, second and third water discharging units disposed through the first, second and third auxiliary side walls for discharging water to the first, second and third rotary blades respectively. The washing device includes also a water supplying pipe unit interconnecting and communicating the water supplying unit to the first, second and third water discharging units. The water supplying pipe unit is disposed within a mower deck rear space delimited by outer faces of the first, second and third auxiliary side walls. The first, second and third water discharging units are configured to discharge the washing water in such a manner that the center flow portion of the discharged water respectively therefrom is confined within the inner space of the mower deck. | 09-29-2011 |
20110259012 | WORKING VEHICLE - A working vehicle has a cooling fan provided on a first side of an engine to blow air to the engine; a muffler main body provided on a second side thereof in a position lower than an upper surface of a head cover of the engine; and an exhaust pipe exposed in a position facing an air blowing path of the cooling fan higher than the upper surface of the head cover of the engine to discharge exhaust from the muffler main body. | 10-27-2011 |
20120023886 | RIDING MOWER - A riding mower having left and right driving rear wheels independently drivable forward and backward and a pair of left and right steerable front wheels is provided with a support device capable of being mounted with a cylindrical gas cylinder in a horizontal position on an external side of a rollover projection frame. The support device is provided such that the mounted gas cylinder is positioned along front and rear of the rollover protection frame and is mounted in a tilted state in which the central axis of the cylindrical gas cylinder is closer to a central side in a lateral direction of a vehicle body toward a rear side from a plan view. | 02-02-2012 |
20120247077 | RIDING MOWER - A riding mower includes a pair of right and left front wheels; a pair of right and left rear wheels; a driver's seat provided between the rear wheels and the front wheels; an engine provided in the rear of the driver's seat; and a mower provided under the driver's seat. The riding mower is capable of being mounted with a fuel gas cylinder sideways on a side of the engine in which an operation section of the fuel gas cylinder faces backward. The riding mower further includes a guard member that is opposed to a rear surface of the fuel gas cylinder and is switchable between a protection position to cover the rear side of the operation section and an open position to open the rear surface of the fuel gas cylinder. | 10-04-2012 |
20120307863 | ENGINE EXHAUST HEAT TEMPERATURE DETECTION DEVICE - An exhaust gas temperature detection sensor is arranged at a predetermined position outside a muffler, or at a predetermined position outside an exhaust pipe constituting an exhaust gas flow passage on a more downstream side than the muffler in an exhaust direction. The sensor detects that an atmosphere temperature at the predetermined position outside the muffler has reached a predetermined temperature based on an increase in a temperature inside the muffler, or detects that an atmosphere temperature at the predetermined position outside the exhaust pipe has reached a predetermined temperature based on an increase in a temperature of an exhaust gas inside the exhaust pipe. | 12-06-2012 |
20130125703 | WORK VEHICLE - A fuel pump supplying reservoir oil reservoired in an input case to devices to be supplied with the reservoir oil and a filter for filtering the reservoir oil circulating in the input case are provided in the input case. A fuel pump supplying reservoir oil in each of left and right axle cases to a hydraulic continuously variable transmission provided in each of the axle cases and a filter filtering the reservoir oil circulating in each of the left and right axle cases are provided in each of the left and right axle cases. | 05-23-2013 |
20130256054 | WORK VEHICLE WITH DIESEL PARTICULATE FILTER - A work vehicle includes a cooling fan, an engine, and a diesel particulate filter (DPF) purifying exhaust gas of the engine, placed under a hood in that order, beginning at the front. Exhaust gas from the engine is exhausted through an exhaust passage after passing through the DPF. The cooling fan supplies cooling air to the rear. The DPF is placed such that a length direction thereof follows a width direction of a vehicle body. The exhaust passage includes a first passage, a second passage, and a third passage. The first passage extends forward and upward from the DPF before extending along the length direction thereof on a front side of the DPF. The second passage extends downward from a downstream portion of the first passage. The third passage extends to the rear from a downstream portion of the second passage and also includes an exhaust outlet. | 10-03-2013 |
20140014429 | WORK VEHICLE - A work vehicle includes a fixed hood covering a rear area of an engine compartment housing an engine and an engine accessory, a swing axis extending through the rear area of the engine compartment in a transverse direction of the vehicle, and a swing hood swinging around the swing axis between a closed position and an open position. The swing hood tucks the fixed hood inside the swing hood and thus covers the fixed hood in the open position, and covers a front area and a middle area of the engine compartment and overlaps with a front end portion of the fixed hood in the closed position. | 01-16-2014 |
20140157747 | MOWER AND GRASS MOWING MACHINE INCLUDING THE SAME - There is provided a mower in which a guide member does not easily protrude on the side of the mower, and a grass mowing machine including the same. A mower for discharging mowed grasses from a discharge port provided in a side part of a mower deck to an exterior of the mower deck includes a flexible rubber sheet formed in a flat plate shape, a pivot frame, support frames, and a pivot shaft for attaching the rubber sheet to the mower deck oscillatably in the up and down direction, and fixing clips for fixing the rubber sheet to the mower deck in a state that the rubber sheet is bent into a shape capable of guiding the mowed grasses discharged from the discharge port. | 06-12-2014 |
20140196428 | MOWER BLADE - Mower blade utilizes a blade portion formed on the blade main body and an air circulator portion formed on the blade main body and generating airflow via rotation centered around the vertically-oriented axis of the mower blade. The blade portion is arranged in a length-direction end portion of the blade main body and extends along a predetermined area in the length-direction. The air circulator portion is located opposite the blade portion in a width direction, has a rising upward portion, and extends along a predetermined area in the length-direction. A boundary portion is arranged between the blade main body and a rising upward portion of the air circulator portion has a portion inclined or angled with respect to the blade portion such that, beginning at the length-direction end portion, a distance between the boundary portion and the blade portion increases along the length-direction and moving toward the vertically-oriented axis. A height of an upper end portion of the air circulator portion measured from a surface of the blade main body is a substantially constant height. | 07-17-2014 |
Patent application number | Description | Published |
20100027228 | SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME - A semiconductor device includes wiring boards each having an insulating board, conductor circuits and through-holes, the insulating board having top and bottom surfaces, the conductor circuits formed on the top and bottom surfaces, the through holes penetrating the insulating board and electrically connecting the conductor circuits of the top and bottom surfaces; conductor posts each having flange, head and leg portions, the flange portion having first and second surfaces and having an external diameter larger than that of the through-hole, the head portion protruding from the first surface, the leg portion protruding from the second surface; and electronic components each having an electrode formed on one or more surfaces and connected to the leg portion. The head portion is inserted until the first surface of the flange portion comes into contact with the bottom surface of the wiring board and electrically connected at an inner wall of the through-hole. | 02-04-2010 |
20140090460 | PARTICULATE COLLECTION FILTER STATE DETECTION DEVICE - A particulate collection filter state detection device according to the present invention includes first pressure detection means for detecting a first pressure produced at an upstream side of the filter on an exhaust gas flow path, second pressure detection means for detecting a second pressure produced at a downstream side of the filter on the exhaust gas flow path, first Fourier transformation means for applying Fourier transformation to a value of the first pressure detected by the first pressure detection means, second Fourier transformation means for applying Fourier transformation to a value of the second pressure detected by the second pressure detection means, comparison means for comparing a spectral intensity and/or a phase at a zero frequency and a spectral intensity and/or a phase at a predetermined frequency obtained by the first Fourier transformation means and a spectral intensity and/or a phase at a zero frequency and a spectral intensity and/or a phase at a predetermined frequency obtained by the second Fourier transformation means, and filter state determination means for determining a state of the filter based on a comparison result provided by the comparison means, so as to conduct determination of a state of a filter for collecting particulates in an exhaust gas at a good precision. | 04-03-2014 |
Patent application number | Description | Published |
20080265616 | Weather strip and method for manufacturing the same - A door weather strip includes a base attached along the outer periphery of a door frame and a hollow seal, and a clip attached to the base. The clip includes an engaging part fit in and enagageable with an attaching hole in the door frame and a retained part retained to the base. The retained part includes a retaining piece and a coupling portion coupling the center area of the retaining piece in the longitudinal direction and the engaging part. Using an inserting means equipped with an insertion pin which is nearly cylindrical and sharp-pointed, the insertion pin is pierced into the base so that the retaining piece is fed through the inner peripheral side of the insertion pin to the inner face side of the base, thereby attaching the clip to the base. | 10-30-2008 |
20090056229 | Door weatherstrip - A door weather strip is attached round a circumferential edge of a door of an automotive vehicle. An extruded portion | 03-05-2009 |
20090100761 | Door weatherstrip - A door weatherstrip includes a mounted base portion which is mounted along an outer circumference of a door frame, and a seal portion which extends in an outer circumferential direction of a door from the mounted base portion. The mounted base portion includes a base bottom portion, a vehicle-interior side wall portion and a vehicle-exterior side wall portion, and an isolating wall portion. The mounted base portion is made from an EPDM sponge rubber material into which polyethylene is mixed to have a specific gravity of 0.2 or larger and smaller than 0.45 and a low expansion stress of 200 kPa or larger. The seal portion is made from an EPDM sponge rubber material having a specific gravity of 0.45 or larger and 1.0 or smaller and a low expansion stress of 120 kPa or larger and smaller than 200 kPa. Thus, the door weatherstrip is provided in which the specific gravity of the mounted base portion is made smaller than the specific gravity of the seal portion and a material rigidity of the mounted base portion is larger than a material rigidity of the seal portion. | 04-23-2009 |
20090241431 | Glass run and sealing structure for door vehicle - A glass run includes a base part, a body part having a substantially U-shape in cross section and provided with side wall portions extended from the base part, and seal lips extended from substantially tip ends of the respective side wall portions inward into the body part. An entire region of the glass run in a longitudinal direction is formed by extrusion molding. A part of the glass run corresponding to a frame positioned above a belt line is provided with design lips extended from the substantially tip ends of the respective side wall portions outward of the body part. Flange parts of a sash parts DS which is provided along an outer periphery of a window part are clamped between the respective design lips and the side wall portions whereby the glass run is mounted to the sash part. A distance of the glass run from an outer peripheral face of the base part to the tip ends of the side wall portions is 15 mm or less. | 10-01-2009 |
20090266000 | Weather strip for motor vehicle - A weather strip for a motor vehicle, which is capable of meeting the need for the provision of a lightweight motor vehicle, and exhibiting a great holding force against a flange of a vehicle body. The weather strip includes a trim portion having a generally U-shaped cross-section and a tubular seal portion. The trim portion includes an outer side wall, a bottom wall and an inner side wall, flange holding lips extend in an interior of the trim portion, and the tubular seal portion is formed near a center of an exterior surface of the bottom wall via a neck portion. An exterior surface of a corner portion between the bottom wall and the outer side wall, and an exterior surface of a corner portion between the bottom wall and the inner side wall are respectively formed to have an angle of 90° through 100°, angular parts of both the corner portions are formed with a radius of curvature of 0.2 mm through 2.0 mm, and the outer side wall, the bottom wall and the inner side wall respectively exhibit a JIS hardness of 75 through 100, and are respectively formed of a hard material of rubber or a thermoplastic elastomer with an apparent specific gravity of not less than 0.8. | 10-29-2009 |
20100242392 | Weather strip - A weather strip | 09-30-2010 |
Patent application number | Description | Published |
20120276793 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a nozzle, a deflector, and a forward bucket (hereinafter referred to as “F bucket”). In a state in which the F bucket is in a closed position and the deflector is positioned at a left side, water jetted obliquely rearward to the left from the deflector is guided by the F bucket in a left guiding direction that is tilted further to the left than a direction of jetting of water from the deflector. In a state in which the F bucket is in the closed position and the deflector is positioned at a right side, water jetted obliquely rearward to the right from the deflector is guided by the F bucket in a right guiding direction that is tilted further to the right than the direction of jetting of water from the deflector. | 11-01-2012 |
20130237106 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a nozzle, a deflector, a reverse bucket, and a guide. In a state in which the reverse bucket is positioned at a closed position and the deflector is positioned at a straight drive position, the guide generates a right branch stream flowing in an obliquely forward right direction and a left branch stream flowing in an obliquely forward left direction. In a state in which the reverse bucket is positioned at the closed position and the deflector is positioned at a right side, the guide generates the left branch stream. In a state in which the reverse bucket is positioned at the closed position and the deflector is positioned at a left side, the guide generates the right branch stream. | 09-12-2013 |
20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
Patent application number | Description | Published |
20130022860 | LEAD ACID STORAGE BATTERY - A flooded-type lead acid storage battery in which charging is intermittently carried out in a short period of time and high-efficiency discharge to a load is carried out in a partial state of charge, wherein the charge acceptance and service life characteristics are improved by using a positive plate in which the specific surface area of the active material is set to 6 m | 01-24-2013 |
20130029210 | LEAD ACID STORAGE BATTERY - In a liquid-type lead acid storage battery in which charging is performed for a short time intermittently and high-rate discharging to load is performed in a partially charged state, there are used a positive electrode plate in which the utilization rate of a positive electrode activation substance is set to a range of 50% to 65%, and a negative electrode plate in which a carbonaceous electroconductive material and a bisphenol/aminobenzenesulfonic acid/formaldehyde condensate are added to the negative electrode activation substance, thereby improving the charge acceptance and the lifespan performance; and a separator whose surface disposed opposite the negative electrode plate is formed from a nonwoven fabric made of a material selected from glass, pulp, and polyolefin, is used as a separator; whereby the charge acceptance and the lifespan performance under PSOC are improved. | 01-31-2013 |
20130099749 | LEAD-ACID BATTERY - A flooded-type lead-acid battery in which charging is intermittently carried out in a short period of time and high-rate discharge to a load is carried out in a partial state of charge, wherein the charge acceptance and service life characteristics under PSOC are improved by using a positive plate in which the total surface area of the positive active material per unit of the plate pack volume is set in a range of 3.5 to 15.6 m | 04-25-2013 |
20130157118 | LEAD-ACID BATTERY - In a valve-regulated lead-acid battery in which charging is performed intermittently on every short time and high rate discharging to a load is performed in a partial state of charge (PSOC), a valve-regulated lead-acid battery improved for the charge acceptance and the life characteristic under PSOC than usual is provided. A positive electrode plate having a specific surface area of an active material of 5.5 m | 06-20-2013 |
20150050540 | LEAD ACID BATTERY - On each negative plate ( | 02-19-2015 |
Patent application number | Description | Published |
20110259270 | CARBON COMPONENT AND METHOD FOR MANUFACTURING THE SAME - A carbon component having a hole therein and an outer surface covered with a ceramic coating, and a method for manufacturing the carbon component are provided. The carbon component includes two carbon plate members joined together. The hole is defined by a groove formed on a mating surface of at least one of the carbon plate members and a mating portion of the other of the carbon plate members, which opposes the groove. An inner surface of the hole including a surface of the groove is entirely covered with a ceramic coating. | 10-27-2011 |
20120228795 | CERAMIC SUBSTRATE SUPPORTING MEMBER AND METHOD OF MANUFACTURING CERAMIC MEMBER - There is provided a ceramic substrate supporting member configured to support a ceramic substrate at a tip portion thereof and used for forming a ceramic member coat on the ceramic substrate to manufacture a ceramic member in a reaction furnace. The ceramic substrate supporting member includes a core formed of graphite, and a supporting member coat formed at a surface including at least the tip portion with a pyrolytic carbon layer interposed between the core and the supporting member coat. | 09-13-2012 |
20120315213 | METHOD FOR PRODUCING GRAPHITE MATERIAL AND GRAPHITE MATERIAL - There is provided a method for producing a graphite material and a graphite material produced by the method The method includes a kneading step of adding a hydrophobic binding material to a first carbonaceous raw material containing coke powder, followed by heat kneading to obtain a mixture, a pulverizing step of pulverizing the mixture obtained in the kneading step to obtain a second carbonaceous raw material, a granulating step of obtaining a granulated powder using the second carbonaceous raw material obtained in the pulverizing step, a hydrophilic binding material and a solvent, a molding step of subjecting the granulated powder obtained in the granulating step to cold isostatic press molding to obtain a molded body, a burning step of burning the molded body obtained in the molding step to obtain a burnt product, and a graphitizing step of graphitizing the burnt product obtained in the burning step. | 12-13-2012 |
Patent application number | Description | Published |
20110024799 | COMPOUND SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SAME - A method for manufacturing a compound semiconductor device includes forming a first compound semiconductor layer over a first substrate, the first compound semiconductor layer containing Al | 02-03-2011 |
20110068471 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE - The method of manufacturing a semiconductor device includes forming an insulating film of a silicon compound-group insulation film; forming an opening in the insulation film, applying an active energy beam in an atmosphere containing hydrocarbon gas to form a barrier layer of a crystalline SiC, and forming an interconnection structure of copper in the opening with the barrier layer formed in. | 03-24-2011 |
20110223766 | METHOD AND APPARATUS FOR MANUFACTURING SEMICONDUCTOR DEVICE - A method for manufacturing a semiconductor device includes: exposing an insulating film including a siloxane bond to an energy beam or plasma; and exposing the insulating film to a gas (excluding N | 09-15-2011 |
20120217543 | COMPOUND SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - At least one kind of impurity selected from, for example, Fe, C, B, Ti, Cr is introduced into at least a buffer layer of a compound semiconductor layered structure from a rear surface of the compound semiconductor layered structure to make a resistance value of the buffer layer high. | 08-30-2012 |
20150087119 | COMPOUND SEMICONDUCTOR DEVICE, METHOD OF MANUFACTURING THE SAME, POWER SUPPLY DEVICE AND HIGH-FREQUENCY AMPLIFIER - A compound semiconductor device includes a substrate having an opening formed from the rear side thereof; a compound semiconductor layer disposed over the surface of the substrate; a local p-type region in the compound semiconductor layer, partially exposed at the end of the substrate opening; and a rear electrode made of a conductive material, disposed in the substrate opening so as to be connected to the local p-type region. | 03-26-2015 |
Patent application number | Description | Published |
20120241758 | COMPOUND SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF - A compound semiconductor device is provided with a first nitride semiconductor layer of a first conductivity type, a second nitride semiconductor layer of the first conductivity type which is formed over the first nitride semiconctor layer and being in contact with the first nitride semiconductor layer, a third nitride semiconductor layer of a second conductivity type being in contact with the second nitride semiconductor layer, a fourth nitride semiconductor layer of the first conductivity type being in contact with the third nitride semiconductor layer, and an insulating film insulating the first nitride semiconductor layer and the fourth nitride, semiconductor layer from each other. A source electrode is positioned inside an Outer edge of the insulating film in planar view. | 09-27-2012 |
20130075750 | SEMICONDUCTOR DEVICE - A semiconductor device includes a first semiconductor layer formed on a substrate; a second semiconductor layer formed on the first semiconductor layer; a third semiconductor layer formed on the second semiconductor layer; a gate electrode formed on the third semiconductor layer; and a source electrode and a drain electrode formed on the second semiconductor layer. The third semiconductor layer is formed with a semiconductor material doped with a p-type impurity element. In the third semiconductor layer, a p-type area is formed immediately below the gate electrode, and a high resistance area having a higher resistance than the p-type area is formed in an area other than the p-type area. | 03-28-2013 |
20130082307 | COMPOUND SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREFOR - A compound semiconductor device includes a compound semiconductor laminated structure, a passivation film formed on the compound semiconductor laminated structure and having a through-hole, and a gate electrode formed on the passivation film so as to plug the through-hole. A grain boundary between different crystalline orientations is formed in the gate electrode, and a starting point of the grain boundary is located apart from the through-hole on a flat surface of the passivation film. | 04-04-2013 |
20130082400 | COMPOUND SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - A HEMT has a compound semiconductor layer, a protection film which has an opening and covers an upper side of the compound semiconductor layer, and a gate electrode which fills the opening and has a shape riding on the compound semiconductor layer, wherein the protection film has a stacked structure of a lower insulating film not containing oxygen and an upper insulating film containing oxygen, and the opening includes a first opening formed in the lower insulating film and a second opening formed in the upper insulating film and wider than the first opening, the first opening and the second opening communicating with each other. | 04-04-2013 |
20130083568 | COMPOUND SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREFOR - An HEMT includes, on an SiC substrate, a compound semiconductor layer, a silicon nitride (SiN) protective film having an opening and covering the compound semiconductor layer, and a gate electrode formed on the compound semiconductor layer so as to plug the opening. In the protective film, a projecting portion projecting from a side surface of the opening is formed at a lower layer portion | 04-04-2013 |
20130083569 | MANUFACTURING METHOD OF COMPOUND SEMICONDUCTOR DEVICE - A passivation film is formed on a compound semiconductor layered structure, an electrode formation scheduled position for the passivation film is thinned by dry etching, a thinned portion of the passivation film is penetrated by wet etching to form an opening, and a gate electrode is formed on the passivation film so as to embed this opening by an electrode material. | 04-04-2013 |
20130214287 | SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF - A semiconductor device is provided with: a GaN layer; an anode electrode that forms a Schottky junction with a Ga face of the GaN layer; and an InGaN layer positioned between at least a part of the anode electrode and the GaN layer. | 08-22-2013 |
20130292790 | SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF - A semiconductor device includes a semiconductor layer and a Schottky electrode, a Schottky junction being formed between the semiconductor layer and the Schottky electrode. The Schottky electrode includes a metal part containing a metal, a Schottky junction being formed between the semiconductor layer and the metal part; and a nitride part around the metal part, the nitride part containing a nitride of the metal, and a Schottky junction being formed between the semiconductor layer and the nitride part. | 11-07-2013 |
20140092637 | COMPOUND SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - A compound semiconductor device includes: a compound semiconductor layered structure; a gate electrode formed above the compound semiconductor layered structure; a first protective insulating film that covers a surface of the compound semiconductor layered structure and is made of silicon nitride as a material; a second protective insulating film that covers the gate electrode on the first protective insulating film and is made of silicon oxide as a material; and a third protective insulating film that contains silicon oxynitride and is formed between the first protective insulating film and the second protective insulating film. | 04-03-2014 |
20140185347 | COMPOUND SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREFOR - An HEMT includes, on an SiC substrate, a compound semiconductor layer, a silicon nitride (SiN) protective film having an opening and covering the compound semiconductor layer, and a gate electrode formed on the compound semiconductor layer so as to plug the opening. In the protective film, a projecting portion projecting from a side surface of the opening is formed at a lower layer portion | 07-03-2014 |
20140295666 | COMPOUND SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREFOR - A compound semiconductor device includes a compound semiconductor laminated structure, a passivation film formed on the compound semiconductor laminated structure and having a through-hole, and a gate electrode formed on the passivation film so as to plug the through-hole. A grain boundary between different crystalline orientations is formed in the gate electrode, and a starting point of the grain boundary is located apart from the through-hole on a flat surface of the passivation film. | 10-02-2014 |
20140346525 | SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF - A semiconductor device includes a first semiconductor layer formed of a nitride semiconductor on a substrate; a second semiconductor layer formed of a nitride semiconductor on the first semiconductor layer; a gate trench formed in the second semiconductor layer or in the second and first semiconductor layers; a gate electrode formed at the gate trench; and a source electrode and a drain electrode formed on the second semiconductor layer. The gate trench has terminal parts of a bottom of the gate trench formed shallower than a center part of the bottom. A part of a sidewall of the gate trench is formed of a surface including an a-plain surface. The center part of the bottom is a c-plain surface. The terminal parts of the bottom form a slope from the c-plain surface to the a-plain surface. | 11-27-2014 |