baber/WOPTO huggingface dataset:
Patent JP-2007533975-A (JP)
IPC: G01D5/16
Filed: 2004-10-22
Abstract: A sensor device comprising an angle sensor (1) for a device consisting of a first part (2) and a second part (3) which can be rotated towards each other, said rotation being defined by an axis of rotation (5). The angle sensor (1) connected to the second part (3) detects the sine and cosine components (s, k) of a magnetic field (B) according to an angle of rotation (alpha), said magnetic field being generated by a magnet device (4) which is involved in said rotation along with the first part (2). In order to detect angles greater than 360°, the amount of magnetic field (B) is also determined as another component, in addition to the relative angle of rotation (alpharelativ), said amount varying in a predefinable manner according to an absolute angle of rotation (alphaabsolut). The variation is sufficiently great in order to exclude ambiguities in the angle indication by logically combining the relative angle of rotation (alpharelativ) with the amount of the magnetic field (B).
Patent JP-2007512289-A (JP)
Title: 不安処置のための（＋）−（２ｓ，３ｓ）−２−（３−クロロフェニル）−３，５，５−トリメチル−２−モルホリノール
IPC: A61K31/5375
Filed: 2004-11-25
Abstract: 本発明は、（＋）−（２Ｓ，３Ｓ）−２−（３−クロロフェニル）−３，５，５−トリメチル−２−モルホリノール・塩酸塩またはその塩もしくは溶媒和物の新規使用、特に、不安障害の処置または混合性不安抑うつ障害の処置におけるその使用に関連付けられる。
Patent JP-2007511362-A (JP)
Title: 排ガス処理装置
IPC: H01L21/00
Filed: 2004-11-12
Abstract: 湿式スクラバー又は他の装置との入口パイプ（１４）のためのアタチメント（１０）は、入口パイプのフランジ付端（１２）に着脱自在に連結されるようになった開口端（１８）を有するスリーブ（１６）を含む。シャフト（３０）がスリーブ（１６）内で移動でき、スクレーパ（３４）がシャフト（３０）の一端に取り付けられる。シャフト（３０）は、該シャフト（３０）の他端に取り付けられた空気シリンダ（４０）の一部を成す。使用中、シャフト（３０）を往復移動させてスクレーパ（３４）がパイプ（１４）内に付着した粒状物を取り除く。窒素又は乾燥空気のような加熱ガスをスリーブ（１６）に注入して洗浄液体がスリーブ（１６）内で凝縮するのを防止し、かくして、スリーブ内での粒状物の付着を抑制する。
Patent JP-2007511978-A (JP)
IPC: H04B1/16
Filed: 2004-11-02
Abstract: A low-noise filter for a wireless receiver is disclosed. The low-noise filter comprises an amplifier and a filter comprising a frequency dependent negative resistance implemented using a general impedance converter to realize a bi-quad filter. The low-noise filter is implemented such that noise generated by the filter when an in-band signal is processed is prevented from appearing at the output of the amplifier stage.
Patent JP-2007511980-A (JP)
Title: ダイバーシティアンテナ切換装置を用いたｆｍｉｂｏｃ受信機のコヒーレントトラッキング
IPC: H04L27/26
Filed: 2004-11-12
Abstract: 複数のデジタル変調基準サブキャリアを含むラジオ信号をコヒーレントトラッキングする方法が提供される。この方法は、基準サブキャリア上で送信されるシンボルを受信し、基準サブキャリアのシンボルを既知の基準系列共役と結合して複数のサンプルを発生させ、これらのサンプルにメディアンフィルタリングを施してフィルタリング済みサンプルを発生させ、各基準サブキャリアについて複数の基準サブキャリアにわたりサンプルを平滑化して各サブキャリアのコヒーレント基準信号推定値を発生させるステップより成る。少なくとも１つのデジタル変調基準キャリアを含むラジオ信号をコヒーレントトラッキングする受信機も提供される。
Patent JP-2007513914-A (JP)
Title: 新規除草剤
IPC: C07D213/50
Filed: 2004-12-10
Abstract: 置換基が請求項１において定義されるとおりである式（Ｉ）の化合物およびこれらの化合物の農薬的に許容される塩／Ｎ−オキシド／異性体／エナンチオマーは除草剤として使用するのに適している。
Patent JP-2007523739-A (JP)
IPC: F01N3/28
Filed: 2004-12-22
Abstract: A block, particularly for filtering particulates present in the exhaust gases of an internal combustion engine, includes a plurality of flow channels for the gases (14e,14s), each of the channels (14e,14s) being bounded by a side wall (22), a plug (15e,15s) and an opening (19e,19s) terminating outwardly. The block according to the invention is remarkable in that a first portion (34) of the side wall (22) of at least one of the channels (14p,14p″), called the “reinforced channel”, includes a reinforcement compared to the rest of the side wall (22) forming a second portion (36) of the side wall (22), the ratio (R) of the thickness of the first portion (34) to the thickness of the second portion (36), in any transverse plane of section (P), being between 1.1 and 3.
Patent JP-2007515966-A (JP)
Title: 疾患の併用療法のための組成物および方法
IPC: C12N15/864
Filed: 2004-12-23
Abstract: 【課題】  対象物の標的細胞における遺伝子生成物の量を変えることにより、望ましい生理学的な状態を誘発することができる。前記標的細胞は、ＲＮＡｉにより少なくとも１つの第一遺伝子の発現を減少させるように設計された少なくとも１つの化合物、及び少なくとも１つの第二遺伝子からの発現を増強させるように設計された少なくとも１つの化合物により処理される。前記標的脂肪における前記第一遺伝子の減少された発現、及び前記第二遺伝子からの増強された発現は、前記対象者における望ましい生理学的状態を誘発する。このような方法おいて標的細胞の遺伝子発現を変化することによって、血管新生、又は腫瘍増殖及び転移などの状況が阻害され得る。 【選択図】      図２
Patent JP-2007518866-A (JP)
Title: 軽質オレフィンの生産を最大にする選択的成分分解のシステムおよび方法
IPC: C10G11/18
Filed: 2005-01-19
Abstract: 【課題】軽質オレフィンの生産を能率的かつ選択的に最大にすることのできる流動接触分解システムおよび方法の提供。 【解決手段】相対的に重質の炭化水素の一次供給物を流動化粒子触媒と反応帯で接触分解条件下で接触させて３−４炭素原子を有する軽質オレフィンに転化させ、廃触媒粒子並びに軽質オレフィンおよび他の反応生成物を含む気体状の流れを含む反応混合物を、容器により閉じられた内部空間（ストリッピング域とサイクロン分離システムの少なくとも一部を有する上方域とを含む）内に配置されたサイクロン分離システムに運び、サイクロン内部の圧力をストリッピング域の圧力より少なくとも０．０５ｐｓｉｇ低く操作する流動接触分解法。 【選択図】図２
Patent JP-2007522593-A (JP)
Title: 高速試験および冗長計算のためのリモートｂｉｓｔ
IPC: G11C29/44
Filed: 2005-01-24
Abstract: 【課題】組み込み自己試験（ＢＩＳＴ）機能をリモート低速実行可能命令およびローカル高速実行可能命令にセグメント化する埋め込みメモリ・アレイのためのハイブリッドＢＩＳＴアーキテクチャを提供する。 【解決手段】独立型ＢＩＳＴロジック・コントローラ（１１０）は、より低い周波数で動作し、ＢＩＳＴ命令セットを用いて複数の埋め込みメモリ・アレイ（１１１−１１３）と通信する。高速試験ロジックのブロック（１１６）は、試験中の各埋め込みメモリ・アレイに組み込まれ、独立型ＢＩＳＴロジック・コントローラ（１１０）から受信されたＢＩＳＴ命令をより高い周波数で局所的に処理する。高速試験ロジックは、ＢＩＳＴ命令の周波数を、より低い周波数からより高い周波数に増大させるためのマルチプライヤ（１１８）を含む。独立型ＢＩＳＴロジック・コントローラは、複数の埋め込みメモリ・アレイにおける複数の高速試験ロジック構造を可能にする。 【選択図】図１
Patent JP-2007522510-A (JP)
Title: オーディオ符号化
IPC: G10L19/26
Filed: 2005-02-10
Abstract: 本発明の中心思想は、複数のノードから始まる複数の中間オーディオ値のための複数の補間値を得るための従来の手順、すなわち複数のフィルタ係数および増幅値に関する補間が退けられなければならないということである。含まれる可聴アーティファクトがより少ない符号化は、増幅値の補間によってではなく、各ノードすなわち転送される各パラメータ化値のためのマスキング閾値から導出されるパワーリミットを好ましくはこのマスキング閾値の大きさの２乗より下の範囲として取り、次に隣接するノードのパワーリミット間の補間、たとえば線形補間などを実行することによって得ることができる。次に、符号器および復号器側の両方で、量子化によって発生し、復号器側でのポストフィルタリング前は一定の周波数を有する量子化ノイズがポストフィルタリング後にパワーリミットかそれより下になるように、決定される中間パワーリミットから増幅値を計算することができる。 【選択図】図１
Patent JP-2007522935-A (JP)
Title: フッ素化化合物−含有ガス流を処理する方法及び装置
IPC: B01J19/08
Filed: 2005-02-18
Abstract: 【課題】ぺルフルオロ化合物-含有ガス・ストリーム、例えば、半導体製造処理ツールから排出流動体ストリームを処理する方法を提供する。 【解決手段】一実施形態では、窒素又はアルゴンのような、イオン化ガスからプラズマを生成するためにプラズマ・トーチが用いられる。このプラズマは、水蒸気のストリーム及び排出流動体ストリームの両方を受け容れる、反応室の中に注入される。イオン化ストリームは、ぺルフルオロ化合物との反応のために加熱Ｈ + 及びＯＨ - イオンに水蒸気を分解する。ぺルフルオロ化合物-含有ガス・ストリームを処理する装置は、源ガスからプラズマを生成する手段と、反応室の中にプラズマを注入する手段と、反応室へガス・ストリームを運ぶ手段と、及びプラズマにＨ + 及びＯＨ - イオンの源を運ぶ手段とを備えている。 【選択図】図５
Patent JP-2007525217-A (JP)
Title: レプチンプロモーター多型及びその使用
IPC: C12Q1/68
Filed: 2005-02-19
Abstract: 本発明は、レプチンプロモーターにおける一塩基多型（ＳＮＰ）と、循環レプチンレベル、飼料摂取量、成長速度、体重、屠体価値、及び屠体構成に連関した、これらのＳＮＰの特定のアレルを有する動物を同定する方法とに関する。本発明は、これらのＳＮＰを増幅及び／又は検出するためのプライマー及び／又はプローブとして使用できるオリゴヌクレオチドを提供し、動物、特にウシを遺伝子型に従って選抜し、集団に分ける方法を提供する。
Patent JP-2008171482-A (JP)
Title: Disk drive unit
Inventor: SHINDO HITOSHI
IPC: G11B25/04
Filed: 2007-01-09
Abstract: <P>PROBLEM TO BE SOLVED: To raise junction reliability of a soldering part between a feedthrough and a casing on a stress applied by deformation due to change of temperature environment in use in a disk drive unit in which low density gas is filled.  <P>SOLUTION: Helium gas is filled in a storage space of an HDD 1 of this invention. The feedthrough 150 is soldered to a feedthrough loading face 252 of a base 102. In a part where thermal stress becomes relatively large, breadth of feedthrough loading face 252 is increased, and in a part where thermal stress becomes small, breadth of the feedthrough loading face 252 is reduced. Thereby occurrence of a crack penetration path by thermal stress in the soldering part 261 is prevented and contact between the soldering part and the pin 152 can be avoided.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008172561-A (JP)
Title: Lighting device, image reading apparatus and image forming apparatus
Inventor: NAGAO YOSHIAKI
IPC: G03B27/54
Filed: 2007-01-12
Abstract: <P>PROBLEM TO BE SOLVED: To obtain an excellent image by efficiently irradiating an original surface with light even in the case of a light source configured by arranging point light sources in the shape of an array in a main scanning direction and reducing a deterioration in an image when regular reflected light comes into an imaging device.  <P>SOLUTION: This lighting device is provided with a light source provided with a LED array 402 formed by arranging a plurality of LED light emitting devices 401 in a line to irradiate an original with light, and a diffusion member 702 arranged between the LED array 402 and the original to diffuse light emitted from a light irradiating body, and a distance L of the diffusion member 702, the LED array 402, or the like is L=(P/2)tanΘ when an interval between the LED light emitting devices 401 arranged in a line is P, and an angle at which relative light intensity in an irradiation surface in a light emission distribution of the LED light emitting device 401 becomes 0. 5 is Θ.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008168550-A (JP)
Title: Liquid ejection head and liquid ejection device having the same
Inventor: YASOJIMA TAKESHI
IPC: B41J2/055
Filed: 2007-01-12
Abstract: <P>PROBLEM TO BE SOLVED: To provide a liquid ejection head which has a protective film that is free from a defect and ensures good adhesiveness.  <P>SOLUTION: The liquid ejection head comprises a channel forming substrate 10 in which pressure generating chambers 12 communicating with respective nozzle openings 21 are formed, and piezoelectric elements 300 for generating pressure change in the respective pressure generating chambers 12. Each pressure generating chamber 12 has the liquid resistant protective film 16 formed at least on an inner wall thereof. The protective film 16 consists of an amorphous layer 16a made of an amorphous film formed on a surface of the inner wall, and a crystalline layer 16b made of a crystallized film formed on a surface of the amorphous layer 16a.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008168584-A (JP)
Title: Liquid ejector, image formation device and liquid discharge method
Inventor: KOJIMA TOSHIYA
IPC: B41J2/175
Filed: 2007-01-15
Abstract: <P>PROBLEM TO BE SOLVED: To obtain a stable discharging state of a liquid to be discharged by assuring a gas barrier property and preventing color material contained in the liquid for discharge from cohering and precipitating.  <P>SOLUTION: The liquid ejector is equipped with: a liquid storage part for storing the liquid for discharge in a case, a nonvolatile liquid whose gas permeability is lower than the one of the liquid for discharge and a gas in the state that the liquid for discharge and the gas are separated by the existing of the nonvolatile liquid between the liquid for discharge and the gas; a pressure control section for controlling the pressure of the liquid for discharge in the case by charging and discharging the gas into and from the liquid storage part; and a recording head equipped with a discharge means which communicates to the liquid storage part and pressurizes the liquid for discharge to make it discharged from the nozzle.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008066690-A (JP)
Title: Probe card with surface light source
Inventor: YOKOTA SHUICHI
IPC: G01R31/26
Filed: 2007-01-24
Abstract: <P>PROBLEM TO BE SOLVED: To provide a probe card which stably irradiates a semiconductor integrated circuit to be examined with light of uniform illuminance, without causing illuminance unevenness.  <P>SOLUTION: A surface light source 2 is arranged on the undersurface of the central part of a disk-shaped probe card board 1. Two or more probe needles 3 are attached to the circumference of the surface light source. The tips of these probe needles 3 are extended toward a lower part of the surface light source 2, and are brought into contact with an integrated circuit to be examined which is not illustrated, when electrical property inspection is carried out.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008184482-A (JP)
Title: Conductive resin composition containing styrene-based elastomer
Inventor: KOMATSU HIDEO
IPC: B65D65/02
Filed: 2007-01-26
Abstract: <P>PROBLEM TO BE SOLVED: To obtain a conductive resin composition for providing a sheetlike and a film-like material having a reduced surface glossiness and an excellent mechanical properties such as tensile strength, durability to folding, etc.  <P>SOLUTION: The conductive resin composition comprises (A) 100 parts by mass of a thermoplastic aromatic polycarbonate having a melt flow rate (MFR) of 2-50 g/10 minutes, (B) 1-10 parts by mass of a thermoplastic polyalkylene phthalate, (C) 1-10 parts by mass of a styrene-based elastomer having a styrene ratio of 10-20 and (D) 5-20 parts by mass based on 100 parts by mass of the total of the component (A), the component (B) and the component (C) of conductive carbon black having an n-dibutyl phthalate (DBP) oil absorption of 100-400 ml/100 g.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008169823-A (JP)
Title: Waste heat recovery system of internal combustion engine
Inventor: YOKOTA KOICHI
IPC: F02G5/04
Filed: 2007-01-11
Abstract: <P>PROBLEM TO BE SOLVED: To provide an internal combustion engine waste heat recovery system for preventing global warming, which reduces fossil fuel consumption (gas, petroleum or the like) as fuel of the internal combustion engine, and reduces atmospheric emission of exhaust gas such as carbon dioxide (CO<SB>2</SB>) emitted by combustion.  <P>SOLUTION: A part of heat quantity emitted to an external of the internal combustion engine (generally more than 50% of supplied heat quantity) is recovered, and heat energy is converted into mechanical energy, is supplied to a power shaft of an engine main body to reduce fuel consumption of the engine.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008194112-A (JP)
Title: Medical puncture needle
Inventor: KAWASHIMA YUKIO
IPC: A61M25/00
Filed: 2007-02-09
Abstract: <P>PROBLEM TO BE SOLVED: To provide a medical puncture needle which prevents an inserting article from being damaged by the opening edge of an outer needle or being stuck on the opening edge when the inserting article protruded from the outer needle is pulled back.  <P>SOLUTION: Since a protection member 3 made of a material which is softer than the outer needle 1 is provided in a manner to cover the inside of the opening part 1a of the outer needle 1, the inserting article A makes contact with the protection member 3 and does not make contact with a cutting edge 1b of the opening part 1a of the outer needle 1 even if the inserting article A projecting out of the tip of the outer needle 1 is retracted. Consequently, the trouble that the inserting article A is damaged by the cutting part 1b of the outer needle 1 or is stuck on the cutting edge 1b is efficiently prevented.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008046591-A (JP)
Title: Method of producing contact part of actuator, actuator, optical system and image forming apparatus
Inventor: NANJO TAKESHI
IPC: G02B26/10
Filed: 2007-02-09
Abstract: <P>PROBLEM TO BE SOLVED: To reduce driving voltage of an actuator by remarkably reducing the contact area or a contact length at which the operating part of an actuator is made contact during operation and reducing sticking force induced by contact by finely composing the contacting part of actuator smaller than a resolution limit of a lithography technique.  <P>SOLUTION: A method of producing the contacting part with which a working member 504 of the actuator comes into contact is disclosed. The contacting part is composed of at least two or more laminated films 502 and 503, and the overlapped part 505 of the pattern end part 502a of an arbitrary layer and the pattern end part 503a of the other layer of the laminated films.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008197304-A (JP)
Title: Image data processing method
Inventor: YAMADA YOSHIJI
IPC: G09G3/20
Filed: 2007-02-13
Abstract: <P>PROBLEM TO BE SOLVED: To generate a pixel value intensity unevenness correcting value of an optical modulating element.  <P>SOLUTION: An image data processing apparatus which generates the pixel value intensity unevenness correction value of the optical modulating element for correcting pixel value intensity unevenness of each of pixels constituting the optical modulating elements comprises: a whole area pixel value intensity unevenness correction value calculating unit 104 which calculates a whole area pixel value intensity unevenness correction value for correcting pixel value intensity unevenness spreading over the entire area of the optical modulating element; a specified area pixel value intensity unevenness correction value calculating unit 102 which calculates a specified area pixel value intensity unevenness correction value for correcting pixel value intensity unevenness in a specified area enclosing pixel value intensity unevenness present in an area narrower than the whole area of the optical modulating element; a specified area weight coefficient calculating unit 103 which calculates a specified area weight coefficient determining how intensely the specified area pixel value intensity unevenness correction value is applied to each pixel; and a whole area weight coefficient calculating unit 105 which calculates a whole area weight coefficient determining how intensely the whole area pixel value intensity unevenness correction value is applied to each pixel based upon the specified area weight coefficient.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008195829-A (JP)
Title: Polyester film and bottle label produced by using the same
Inventor: MORI HIDETO
IPC: G09F3/04
Filed: 2007-02-13
Abstract: <P>PROBLEM TO BE SOLVED: To provide a polyester film having excellent ultraviolet ray shielding performance in a short wavelength range of ≤410 nm wavelength, having little yellowness and excellent transparency, developing suppressed generation of problems accompanied by bleed-out, etc., in film manufacture and useful as a material for thermal shrink packaging and to provide a bottle label produced by using the film.  <P>SOLUTION: The polyester film contains a fluorescent brightener and an ultraviolet ray absorber and satisfies the following conditions (a) to (c) in the case of molding to a thickness of 50 μm: (a) the haze value is ≤8%, (b) the light transmittance is ≤30% at 410 nm and ≥70% at 430 nm, and (c) the thermal shrinkage generated by immersing the film in hot water of 80°C for 10 sec is ≥40% in the main shrinking direction and ≤5% in the direction perpendicular to the main shrinking direction.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008195865-A (JP)
Title: Modified natural rubber latex and modified natural rubber, and rubber composition and tire
Inventor: MORITA KOICHI
IPC: C08F253/00
Filed: 2007-02-14
Abstract: <P>PROBLEM TO BE SOLVED: To provide a rubber composition having remarkably excellent low loss, abrasion resistance and breaking characteristics, to provide a modified natural rubber suitable as the rubber component of the rubber composition, and to provide a modified natural rubber latex capable of producing the modified natural rubber.  <P>SOLUTION: This modified natural rubber latex prepared by adding a urethane group and/or urea group-containing monomer to a natural rubber latex to addition-react the urethane group and/or urea group-containing monomer to natural rubber in the natural rubber latex is characterized in that the amount of the added urethane group and/or urea group-containing monomer is 0.01 to 5.0 mass% based on the natural rubber in the natural rubber latex. The modified natural rubber is prepared by coagulating and drying the modified natural rubber latex. And the rubber composition uses the modified natural rubber.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008201679-A (JP)
Title: Method for producing lactide from polylactic acid
Inventor: ISHIHARA KENICHI
IPC: C08J11/26
Filed: 2007-02-16
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method for thermally degrading polylactic acid to produce a lactide, wherein the thermal degradation temperature of the polylactic acid is lowered to produce the lactide having a good quality.  <P>SOLUTION: This method for thermally degrading the polylactic acid to produce the lactide is characterized in that the polylactic acid is degraded in the coexistence of an acid compound and a catalyst at a temperature of 170 to 240°C in a condition of pressure of the vapor pressure of the lactide or lower, while distilling away the produced lactide.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008205788-A (JP)
Title: Network device and method for detecting congestion
Inventor: KOBAYASHI NAOHITO
IPC: H04L12/801
Filed: 2007-02-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide a network device capable of easily judging the congestion state of a network and a method for detecting a congestion.  <P>SOLUTION: The event of packet data received by the network device 201 is registered to an event table 214 together with a time for processing the event carrying out the event by an event registering section 215, and a difference between the time carrying out the event and the time for processing the event is computed as a delay time by a congestion detecting section 213. When the computed delay time is larger than the preceding computed delay time, the network is judged as the congestion state.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008200295-A (JP)
Title: Game device, program and information storage medium
Inventor: TAKEI YUKA
IPC: A63F13/45
Filed: 2007-02-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide a game device and program capable of instructing the operations of various forms at an operation timing matched with a musical piece, and to provide an information storage medium.  <P>SOLUTION: Not only the operation timing of a player corresponding to the musical piece but also an operation position by a position specifying operation at the operation timing is compared with reference data and determined, it is evaluated, a performance corresponding to the operation is executed or the like, and various game operations are performed. In particular, by setting the reference position KI of reference region data KRD to be matched with the musical piece, thereby making the player perform the position specifying operations of various forms matched with the musical piece.  <P>COPYRIGHT: (C)2008,JPO&INPIT
Patent JP-2008226865-A (JP)
Title: Semiconductor laser diode
Inventor: OKAMOTO KUNIYOSHI
IPC: H01S5/22
Filed: 2007-02-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide a semiconductor laser diode that can improve laser oscillation efficiency and reduce a threshold current.  <P>SOLUTION: A Fabry-Perot type semiconductor laser diode 70 includes a substrate 1 and a group-III nitride semiconductor laminated structure 2 formed on the substrate 1. The substrate 1 is a GaN single crystal substrate having a plane m as a principal plane. The group-III nitride semiconductor laminated structure 2 is crystal-grown. The group-III nitride semiconductor laminated structure 2 has an m-axis as the principal plane of the crystal growth and is constituted by laminating, in the m-axis direction, an n-type semiconductor layer 11, a light-emitting layer 10, and a p-type semiconductor layer 12. The n-type semiconductor layer 11 includes an n-type AlGaN clad layer 14, and the p-type semiconductor layer 12 includes a p-type AlGaN clad layer 18. A ridge stripe 20 is parallel to the c-axis and a pair of resonator end surfaces 21, 22 are plane +c and plane -c.  <P>COPYRIGHT: (C)2008,JPO&INPIT