baber/WOPTO huggingface dataset:
Patent JP-2010540492-A (JP)
Title: クローン病およびクローン病に関連する症状の治療のためのオピオイド作動薬およびオピオイド拮抗薬の組合せの使用
IPC: A61K9/16
Filed: 2008-09-25
Abstract: 本発明は、クローン病を治療するためのオピオイド作動薬および拮抗薬の組合せの使用に関する。
Patent JP-2011500270-A (JP)
Title: 液圧式調節性眼内レンズ
IPC: A61F2/16
Filed: 2008-06-19
Abstract: 固体シリコーンおよび液体シリコーンで作られた光学部を備えている調節性眼内レンズ。光学部は、前方中央領域すなわち膜を有し、この膜の半径を変化させて度数を変えることができる。
Patent JP-2011505686-A (JP)
Title: 電磁放射遮蔽装置
IPC: E04B1/92
Filed: 2008-11-12
Abstract: 電磁放射遮蔽装置は、第１の表面及び第２の表面を有する第１の層と、第３の表面及び第４の表面を有する第２の層とを含む。第１の層の第２の表面は、第２の層の第３の表面と向かい合っている。それら表面の１つの少なくとも一部分の上に、例えば、第２の表面の少なくとも一部分の上に、３つ以上の金属層を有する第１のコーティングが設けられている。他の諸表面の１つ以上の少なくとも一部分の上に、例えば、第３の表面の少なくとも一部分の上に、３つ以上の金属層を有する第２のコーティングが設けられている。 【選択図】図１
Patent JP-2011504611-A (JP)
Title: 脂肪族熱可塑性ポリウレタンの暫定層を備えおよび縁取りに用いる光学物品
IPC: G02B3/00
Filed: 2008-11-21
Abstract: 本発明による光学物品はその主表面の一方に疎水性および／または疎油性の外側塗膜を備え、乾燥した暫定塗膜で好ましくはポリエーテルまたはポリエステル骨格を持つ１種類以上の脂肪族熱可塑性ポリウレタンから成る組成物が、疎水性および／または疎油性の外側塗膜に直接堆積されていることを特徴とする。   眼鏡レンズに適用する。
Patent JP-2011505302-A (JP)
Title: 改良した回転阻止用突起を有する蓋
IPC: B65D39/08
Filed: 2008-11-26
Abstract: 炭酸飲料等用のパッケージは容器及び蓋を有し、該蓋は、それぞれの協力するねじ形成部の提供により該容器にねじで取り付けられる。蓋取り外し時に該パッケージ内からのガス圧力の放出を容易化するために、本パッケージは該パッケージの容器か、又は蓋か、何れか上に提供される通気溝内に位置付けられる、少なくとも１つの回転阻止突起を有する。とりわけ、本発明の回転阻止突起は、該パッケージの容器及び蓋のねじ形成部のそれぞれ１つにより規定されるらせんに対し垂直方向に非対称に構成される。該配備は該パッケージ内からのガス圧力の放出を容易化し、更に該蓋用の取り外しトルクを最小化することにより消費者による該蓋の簡便な手扱いと取り外しを可能にする。 【選択図】図１
Patent JP-2011508096-A (JP)
Title: ニトリルゴムバインダーを基材とする耐環境性の弾道複合材料
IPC: F41H1/02
Filed: 2008-12-13
Abstract: 海水等の液体、及びガソリンや他の石油系製品等の有機溶剤に曝露された後でも、優れた弾道抵抗性能を保持する弾道抵抗性布帛と弾道抵抗性物品。該布帛は、約１５重量％〜約５０重量％のアクリロニトリル含量を有するニトリルゴムバインダーポリマーで被覆した高性能繊維から作製され、必要に応じて、ニトリルゴムとフッ素含有材料とのブレンドであるバインダーで被覆する。 【選択図】なし
Patent JP-2011508758-A (JP)
Title: Ｎ−フェニルイミダゾ［１，２−α］ピリジン−２−カルボキサミド誘導体、これらの調製およびこれらの治療用途
IPC: A61P25/30
Filed: 2008-12-31
Abstract: 本発明は、式（Ｉ）の化合物に関し、式中、Ｘは置換されたフェニル基であり；Ｒ １ は、水素原子、ハロゲン、（Ｃ １ −Ｃ ６ ）アルコキシ基、（Ｃ １ −Ｃ ６ ）アルキル基、ＮＲａＲｂ基を表し；Ｒ ２ は、水素原子、任意に置換される（Ｃ １ −Ｃ ６ ）アルキル基、任意に置換される（Ｃ １ −Ｃ ６ ）アルコキシ基、（Ｃ ２ −Ｃ ６ ）アルケニル基、（Ｃ ２ −Ｃ ６ ）アルキニル基、−ＣＯ−Ｒ ５ 基、−ＣＯ−ＮＲ ６ Ｒ ７ 基、−ＣＯ−Ｏ−Ｒ ８ 基、−ＮＲ ９ −ＣＯ−Ｒ １０ 基、−ＮＲ １１ Ｒ １２ 基、−Ｎ＝ＣＨ−ＮＲａＲｂ基、ハロゲン原子、シアノ、ニトロ、ヒドロキシイミノアルキル、アルコキシイミノアルキル基、（Ｃ １ −Ｃ ６ ）アルキルチオ基、（Ｃ １ −Ｃ ６ ）アルキルスルフィニル基、（Ｃ １ −Ｃ ６ ）アルキルスルホニル基、（（（Ｃ １ −Ｃ ６ ）アルキル） ３ ）シリルエチニル基、−ＳＯ ２ −ＮＲ ９ Ｒ １０ 基、次の原子または基から互いに独立に選択される１つ以上の基によって任意に置換されるフェニル基：ハロゲン、（Ｃ １ −Ｃ ６ ）アルコキシ、シアノ、ＮＲａＲｂ、−ＣＯ−Ｒ ５ 、−ＣＯ−ＮＲ ６ Ｒ ７ 、−ＣＯ−Ｏ−Ｒ ８ または１つ以上のヒドロキシもしくはＮＲａＲｂ基によって任意に置換される（Ｃ １ −Ｃ ６ ）アルキル基；Ｒ ３ は、水素原子、（Ｃ １ −Ｃ ６ ）アルキル基、（Ｃ １ −Ｃ ６ ）アルコキシ基またはハロゲン原子を表し；Ｒ ４ は、水素原子、（Ｃ １ −Ｃ ４ ）アルキル基、（Ｃ １ −Ｃ ４ ）アルコキシ基またはフッ素原子を表し、この化合物は塩基または酸との付加塩の状態である。本発明は治療に使用できる。
Patent JP-2011514407-A (JP)
Title: テトラフルオロエチレン／ヘキサフルオロプロピレン共重合体及びその製造方法、並びに電線
IPC: H01B3/44
Filed: 2009-02-09
Abstract: 【課題】本発明の課題は、溶融押出成形における成形性の改良、特に電線の押出被覆成形における高速成形時の成形不良の大幅低減を実現するＦＥＰを提供することにある。 【解決手段】本発明に係るテトラフルオロエチレン／ヘキサフルオロプロピレン共重合体は、テトラフルオロエチレン、ヘキサフルオロプロピレン及び第三単量体のうち少なくともテトラフルオロエチレン及びヘキサフルオロプロピレンから、融点が２０℃以上異なる樹脂と混合されることなく得られ、雰囲気温度３１０℃及び角周波数０．０１ｒａｄ／秒の条件下での溶融粘弾性測定において複素粘度が２．０×１０ 3 〜１０．０×１０ 3 Ｐａ・ｓであり、貯蔵弾性率が０．１〜３．５Ｐａである。テトラフルオロエチレン／ヘキサフルオロプロピレン共重合体は、電線における芯導体の被覆として有用である 【選択図】図１
Patent JP-2012142223-A (JP)
Title: Conductive particle, anisotropic conductive material and connection structure
Inventor: MAHARA SHIGEO
IPC: C09J11/04
Filed: 2011-01-05
Abstract: PROBLEM TO BE SOLVED: To provide conductive particles capable of enhancing conduction reliability when used for connection between electrodes in a connection structure, and to provide an anisotropic conductive material using the conductive particles.SOLUTION: A conductive particle 1 relating to the present invention includes: a base material particle 2; a conductive layer disposed on a surface 2a of the base material particle 2 and having laminate structure with one layer or two or more layers; and an anticorrosion metal 4 disposed on a surface of the conductive layer. When the conductive layer 3 has one-layer structure, the ionization tendency of the anticorrosion metal 4 is larger than that of the conductive layer 3. When the conductive layer has laminate structure with two or more layers, the ionization tendency of the anticorrosion metal 4 is larger than that of the outermost layer of the conductive layer. The anisotropic conductive material relating to the present invention includes the conductive particles 1 and a binder resin.
Patent JP-2012147189-A (JP)
Title: Information processing system
Inventor: ASAI KENTARO
IPC: H04L9/08
Filed: 2011-01-11
Abstract: PROBLEM TO BE SOLVED: To provide an information processing system capable of preventing reduction of a communication response.SOLUTION: An information processing system 1 comprises an in-vehicle communication device 4 and an ECU3 mounted on a vehicle 2, and a center device 5. An ACC (accessory) switch 7 is connected to the ECU3. When a certain period of time or more passes since the last change of a common key, the ECU3 determines whether a predetermined time passes since the ACC switch 7 has switched from ON to OFF. When the ECU3 determines that the predetermined time passes, the ECU3 turns ON the power of the in-vehicle communication device 4 only, creates a new common key using a random number, and transmits the new common key to the center device 5 through the in-vehicle communication device 4 with a public key cryptosystem. Then, the center device 5 updates and registers the received new common key to a common key database 9. Afterward, it becomes possible to make communication between the in-vehicle communication device 4 and the center device 5 with the public key cryptosystem using the new common key.
Patent JP-2012150700-A (JP)
Title: Image forming device and processor controlling method
Inventor: HIROI TAKAAKI
IPC: G06T1/20
Filed: 2011-01-20
Abstract: PROBLEM TO BE SOLVED: To provide a high-performance and small-sized image forming device of low power consumption utilizing a many core processor and a processor control method.SOLUTION: A digital copying device 1 is configured to divide a CPU core of a many core processor 11 having many CPU cores executing a plurality of different functions necessary to perform image forming into functional core blocks each of which comprises an appropriate number of CPU cores, to assign the functions to each functional core block, and to cause each of the core blocks to perform processing of the assigned function, independently of functional operations of core blocks with other functions assigned thereto.
Patent JP-2012151764-A (JP)
Title: Printed matter inspection device
Inventor: KOYABU KEITARO
IPC: H04N1/387
Filed: 2011-01-20
Abstract: PROBLEM TO BE SOLVED: To provide a printed matter inspection device which is capable of inspecting a printed matter having variable information printed thereon represented by a slip, without referring to prepared management data etc. and furthermore capable of recording an inspection history.SOLUTION: Code patterns of identification codes recorded on the printed surfaces of a printed matter 15 having the variable information printed on the front and back sides are read respectively by code readers 21a and 21b and converted to code information by a code taking-in part 31. Moreover, a code comparison and determination part 32 compares the code information of the front and back sides and determines whether the code information is correct. The result of the determination is recorded in a storage part 35 and outputted to the outside via an output control part 33.
Patent JP-2012154303-A (JP)
Title: Air/fuel ratio control device
Inventor: ONISHI YASUMASA
IPC: F02D45/00
Filed: 2011-01-28
Abstract: PROBLEM TO BE SOLVED: To regularly keep high the efficiency of exhaust gas purification performed by a catalyst, and to further reduce an exhaust amount of HC, CO and NOx.SOLUTION: This air/fuel ratio control device comprises: a first air/fuel ratio sensor 11 arranged upstream of an upstream-side catalyst 31 which is attached in an exhaust passage of an internal combustion engine 2; a second air/fuel ratio sensor 12 arranged downstream of the upstream-side catalyst 31; a learning part which estimates and stores the oxygen occlusion ability of the upstream-side catalyst 31 by referring to at least an output of the second air/fuel ratio sensor 12; and an air/fuel ratio control part which estimates an oxygen discharge amount from the upstream-side catalyst 31 by referring to at least an output of the first air/fuel ratio sensor 11, and feed-back controls the oxygen discharge amount to a target value which is obtained by multiplying the learnt oxygen adsorption ability with 0.5.
Patent JP-2012154902-A (JP)
Title: Inspection device and inspection method
Inventor: TAKEHISA KIWAMU
IPC: G01N21/956
Filed: 2011-01-28
Abstract: PROBLEM TO BE SOLVED: To provide an inspection device and an inspection method capable of easily achieving a review function.SOLUTION: An inspection device according to one embodiment is an inspection device for inspecting an inspection object used for an EUV mask, comprising a Schwarzschild enlargement optical system 15 with two mirrors of a convex mirror 15b and a concave mirror 15a and a TDI camera 19 for imaging an enlarged projection image of the inspection object, in which an enlarged image of the inspection object by the Schwarzschild enlargement optical system 15 is, by a single concave mirror 18, enlarged and projected onto the TDI camera 19.
Patent JP-2012160302-A (JP)
Title: Fuel cell system
Inventor: SHINODA KAZUNOBU
IPC: H01M8/10
Filed: 2011-01-31
Abstract: PROBLEM TO BE SOLVED: To provide a fuel cell system.SOLUTION: The system is provided with a fuel cell 1, a reformer 2A, and a housing 5. The housing 5 has an upper chamber 52 for housing the fuel cell 1 and the reformer 2A; a lower chamber 53 for housing system auxiliary machines; a partition wall 58 having a ventilation through port 583 for communicating the lower chamber 53 and the upper chamber 52 and parting the upper chamber 52 and the lower chamber 53; a suction port 50 communicating the lower chamber 53 with outside of the housing; and an exhaust port 51 for communicating the upper chamber 52 with the outside of the housing. A ventilation fan 300 is mounted to a lower surface 580 of the partition wall 58 so that it is positioned in the lower chamber 53. The ventilation fan 300 has a fan suction port 302 opposed to the lower surface 580 of the partition wall 58, and an air guide duct 305 communicated with the fan suction port 302 and the ventilation through port 583. The ventilation fan 300 sucks the air stored on the lower surface 580 of the partition wall 58 along the lower surface 580 of the partition wall 580 from the fan suction port 302, flows it to the upper chamber 52 via the air guide duct 305 and the ventilation through port 583 of the partition wall 58, and flow it to the outside of the housing from the exhaust port 51.
Patent JP-2012161172-A (JP)
Title: Non contact charging module and non contact charger
Inventor: KOBAYASHI NAOYUKI
IPC: H02J7/00
Filed: 2011-02-01
Abstract: PROBLEM TO BE SOLVED: To provide a non contact charging module and a non contact charger which achieve the thickness reduction while ensuring the electrical insulation between a conducting wire and a magnetic sheet.SOLUTION: A non contact charging module includes: a planar coil part around which a conducting wire is spirally wound; a magnetic sheet 3 provided so as to face a coil surface through an insulation sheet 4; and a recessed part 33 or a slit which is provided at the magnetic sheet 3 and extends from a wind-start point or a wind-end point of the coil surface to an end part of the magnetic sheet 3. At least a part of the magnetic sheet 3 where the recessed part 33 or the slit is formed is conductive, and the conducting wire is housed in the recessed part 33 or the slit with the insulation sheet 4 pressed into the recessed part 33 or the slit.
Patent JP-2012159797-A (JP)
Title: Optical fiber connector with mirror and manufacturing method thereof
Inventor: SAKAI DAICHI
IPC: G02B6/26
Filed: 2011-02-02
Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber connector with a mirror capable of uniquely positioning between an optical fiber and a mirror regardless of a substrate, and to provide a manufacturing method thereof.SOLUTION: In the optical fiber connector with the mirror, an optical fiber guide member that has an optical fiber insertion groove for fixing an optical fiber and a mirror member that has a vertical surface to be joined with end face of the optical fiber and a slope for converting an optical path are juxtaposed on a substrate, so that the end face of the optical fiber fixed in the optical fiber insertion groove and the vertical surface of the mirror member are joined at such a position as being capable of transmitting and receiving optical signals.
Patent JP-2012162280-A (JP)
Title: Separately packed article treatment system
Inventor: OZEKI SHUJI
IPC: B65B69/00
Filed: 2011-02-04
Abstract: PROBLEM TO BE SOLVED: To provide a separately packed article treatment system which has improved efficiency of recovery of powder or grain from a separately packed article even when the powder or the grain is easily recovered from the separately packed article.SOLUTION: The separately packed article treatment system 1 includes a separately packed article treatment apparatus 2 which includes: a pair of rollers 14 and 16 having outer circumferential surfaces opposite to each other; and a cutter 14a formed in the outer circumferential surface of one roller 14 along its circumferential direction. The separately packed article treatment apparatus 2 feeds a separately packed article S into a gap F between the opposing outer circumferential surfaces of the rollers 14 and 16 while rotating the rollers 14 and 16 in directions reverse to each other, the separately packed article S being formed by packing the powder or the grain in a bag shape, and the separately packed article treatment apparatus 2 cuts the package bag S1 of the fed separately packed article S by the cutter 14a, thereby recovering a product S2 from the separately packed article S. The axial center 16b of the other roller 16 is positioned on a side where the separately packed article S is fed with respect to the axial center 14b of the one roller 14.
Patent JP-2012164187-A (JP)
Title: Data processing device, data processing method, and program
Inventor: TAKAGI YOSHINORI
IPC: G06T9/00
Filed: 2011-02-08
Abstract: PROBLEM TO BE SOLVED: To provide a data processing device, a data processing method, and a program that are capable of reducing data having a spatial spread to data in which its feature is appropriately reflected.SOLUTION: An n-dimensional (n is a natural number equal to or greater than 2) data table is read out (step S102), the most frequent value is calculated for each data array in a first dimension direction on the data table (step S103), the existence number of the most frequent values of the respective data arrays in the first dimension direction is calculated for each data array in an (n-1)-th dimension direction except the first dimension direction (step S104), and a data array in the (n-1)-th dimension direction having the maximum existence number of the most frequent values is extracted from the data table (step S106).
Patent JP-2012164911-A (JP)
Title: Semiconductor light-emitting device
Inventor: IZUKA MIYUKI
IPC: H01L33/38
Filed: 2011-02-09
Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor light-emitting device in which the polarity of external electrodes can be identified.SOLUTION: A semiconductor light-emitting device comprises: a semiconductor layer; a p-side electrode; an n-side electrode; a p-side metal pillar; an n-side metal pillar; and an insulating material. The p-side metal pillar has a p-side external terminal that is exposed from the insulating material on a surface different from the surface onto which the p-side electrode is connected. The n-side metal pillar has an n-side external terminal that is exposed from the insulating material on a surface different from the surface onto which the n-side electrode is connected. The p-side external terminal and the n-side external terminal are different from each other in at least any of an area and a planar shape.
Patent JP-2012169399-A (JP)
Title: Die pickup device
Inventor: IWAKI NORIAKI
IPC: H01L21/52
Filed: 2011-02-14
Abstract: PROBLEM TO BE SOLVED: To shorten tact time by shortening time required for peeling a sheet of a die bonded to a dicing sheet.SOLUTION: A sheet suction hole 40 of a peeling stage 18 includes a first suction hole 41 peeling the sheet so that the die 21 can pickup a bonding part of the die 21, which is to be picked up this time, and a second suction hole 42 which preliminarily sheet-peels a part of the bonding part of the die 21, which is to be picked up next. Whenever a suction nozzle 30 picks up the die 21 which is sheet-peeled, the peeling stage 18 is moved to near side of the bonding part of the die 21, which is to be picked up next. The peeling stage 18 is slid to just below the bonding part of the die 21 and the bonding part of the die 21 is sheet-peeled in the first suction hole 41 so that the die 21 can be picked up, and a part of the bonding part of the die 21, which is to be picked up next to the die 21, is preliminarily sheet-peeled in the second suction hole 42.
Patent JP-2012169977-A (JP)
Title: Acoustic navigation system
Inventor: KONDO MAMORU
IPC: H04R3/12
Filed: 2011-02-16
Abstract: PROBLEM TO BE SOLVED: To provide a system that can repeatedly generate signal sound to inform a pedestrian of navigation path as needed so that the pedestrian can understand the entire direction of a walking range and the relationship between hazardous places and the location of the pedestrian.SOLUTION: To build a system that repeatedly navigates a pedestrian, static speakers are each provided on locations of A, B, C, and D. Those speakers mimic a tweet of a small bird by producing sound only when the bird flies over the locations. Thus, with moving the production locations of the multiple static speakers along the navigation path, the system can inform the pedestrian of the entire direction of a walking range and the relationship between hazardous places and the location of the pedestrian. In order to move the production locations of signal sounds for each certain period, the speakers are grouped into four phases of A and E, B and F, C and G, and D and H and connected to four electric cables. Then, those cables and a common earth are combined into a signal cable which is provided along the navigation path. Acoustic signals are transmitted into each of the electric cables with a gap of certain period so that each of the speakers can produce sound at an appropriate timing.
Patent JP-2012167237-A (JP)
Title: Medical rubber composition with improved proceesability and crosslinked rubber thereof
Inventor: NODA KENJI
IPC: C08K5/54
Filed: 2011-02-16
Abstract: PROBLEM TO BE SOLVED: To provide a curable composition in which its self-bondability is reduced and fabrication work and molding workability of the curable composition are improved; and a method for producing the same.SOLUTION: This medical rubber composition includes a saturated hydrocarbon polymer (A) having at least one alkenyl group at the molecular terminal, an organic silicon compound (B) having at least two hydrosilyl groups in a molecule, a hydrosilylation catalyst (C) and an organic microparticle powder (D). The method for producing the curable composition comprises a first step of reacting the polymer (A) having an alkenyl group with a composition containing a component (B) in such an amount of total hydroxy group of 0.3-0.7 equivalent to the total alkenyl group in the component (A) and hydrosilylation catalyst (C); and a second step of adding the component (B) with 0.3-3 equivalent total hydrosilyl group amount to the total amount of the alkenyl group in the component (A) to the composition obtained in the first step.
Patent JP-2012171032-A (JP)
Title: Film suction device
Inventor: MATSUO KENGO
IPC: B25J15/06
Filed: 2011-02-18
Abstract: PROBLEM TO BE SOLVED: To provide a film suction device capable easily separating a film.SOLUTION: This film suction device 1 sucks the upper surface of a film A. The film suction device 1 includes: a vacuum chuck 10 including a plurality of pressure chambers 12 in the longitudinal direction, and including a suction surface 10a communicating with the plurality of pressure chambers 12 independently of one another, and bulging between both ends in the longitudinal direction; and a hand device for sequentially bringing the suction surface 10a into contact with the upper surface of the film A from one end to the other end out of both the ends in the longitudinal direction.
Patent JP-2012173881-A (JP)
Title: Operation input device
Inventor: FURUKAWA KENICHI
IPC: G06F3/02
Filed: 2011-02-18
Abstract: PROBLEM TO BE SOLVED: To provide an operation input device for detecting the opening/closing state of a slide section without providing any dedicated switch.SOLUTION: This operation input device includes: a direction key 10 configured so as to be stored in a case 60 in a closing state that a slide section 120 slides in a closing direction, and to displace to a position projected from an opening 61 of the case 60 according as the slide section 120 slides to an opening direction, and to displace inwardly to the opening 61 according to an operation input acting in an opening state that the slide section 120 slides to an opening direction; and a coil 71a configured to detect the position of the direction key 10 in a non-contact state, and to output a signal corresponding to the displacement magnitude of a direction key 19.
Patent JP-2012172193-A (JP)
Title: Method for manufacturing electrolytic cobalt or electrolytic nickel
Inventor: KUDO TAKASHI
IPC: C25C1/00
Filed: 2011-02-21
Abstract: PROBLEM TO BE SOLVED: To provide: electrolytic cobalt excellent in acid solubility, hard to cause undissolved residue in acid dissolution, with a smooth surface, and with a high purity; a method for manufacturing the same; and a method for manufacturing electrolytic nickel.SOLUTION: The method for manufacturing electrolytic cobalt or electrolytic nickel is used for manufacturing electrolytic cobalt or electrolytic nickel by electrowinning or electrorefining by using an electrolytic solution consisting of an acidic solution containing cobalt or nickel. In the electrowinning or the electrorefining, an intermittent energization of repeating non-energization and energization is carried out to the electrolytic solution.
Patent JP-2012174989-A (JP)
Title: Method of manufacturing semiconductor device
Inventor: TOMITA SHIGEKI
IPC: H01L29/78
Filed: 2011-02-23
Abstract: PROBLEM TO BE SOLVED: To provide a method of manufacturing a semiconductor device in which a trench contact structure is formed by self-alignment.SOLUTION: The method of manufacturing the semiconductor device includes a process of forming a gate trench in a semiconductor layer containing silicon by etching the semiconductor layer using, as a mask, a mask layer containing silicon nitride and a side wall film formed on a side wall of the mask layer. Further, the method includes a process of removing the side wall film and forming a base region and a source region in the semiconductor layer using the mask layer as a mask. Furthermore, the method includes a process of forming a contact trench under the part of the semiconductor layer where the mask layer is removed using an inter-layer film containing silicon oxide as a mask.