baber/WOPTO huggingface dataset:
Patent JP-2013507932-A (JP)
Title: 多能性細胞の誘導法
IPC: C07D417/12
Filed: 2010-10-15
Abstract: ヒト誘導多能性幹細胞（iPSC）を生成するための再プログラム化法の遅い動態および低い効率は、生物医学的適用におけるそれらの有用性に大きい制限を課す。ここで発明者らは、処理後7日以内に、ヒト線維芽細胞からのiPSC生成の効率を劇的に改善する（＞200倍）化学的アプローチを記載する。これはヒト体細胞を再プログラム化するためのより安全で、より効率的な、非ウイルス法を開発する基礎を提供する。
Patent JP-2013509917-A (JP)
Title: 内視鏡で使用するための外科手術アダプタ
IPC: A61B1/00
Filed: 2010-11-08
Abstract: 関連部位において内視鏡内に配置された医療装置の一部分を適切に配置するためのアダプタが開示される。 【選択図】図７
Patent JP-2013511153-A (JP)
Title: 設計規則違反を低減するために多重露光及び遮断マスクの手法を用いる半導体デバイス製造
IPC: H01L21/8244
Filed: 2010-11-09
Abstract: 【解決手段】   半導体デバイス（４００）を製造する方法は、半導体材質（４０２）の層及び半導体材質（４０２）の層の上の絶縁材質（４０４）の層を備える基板上に、ハードマスク材質（４０８）の層が絶縁材質（４０４）の層の上になるように、ハードマスク材質（４０８）の層を形成することによって開始する。多重露光フォトリソグラフィ手順が実行されて、ハードマスク材質（４０８）の層の上にフォトレジスト特徴部の結合されたパターンが作製され、またフォトレジスト特徴部の結合されたパターンを用いてハードマスク材質内に凹部線パターンが作製される。方法は、凹部線パターン（４２２）の指定された区画をフォトレジスト特徴部の遮断パターン（４４２）で覆い、そして溝（４５２）のパターンを絶縁材質（４０４）内に形成することによって継続し、ここで溝（４５２）のパターンは、フォトレジスト特徴部の遮断パターン（４４２）及びハードマスク材質（４０８）によって規定される。その後、電気伝導材質（４７２）が溝（４５２）内に堆積させられて、半導体デバイスのための導電線がもたらされる。 【選択図】図４
Patent JP-2013511989-A (JP)
Title: アレリックラダー遺伝子座
IPC: C12Q1/68
Filed: 2010-11-24
Abstract: ヒトのＤ１０Ｓ１２４８およびＤ１２Ｓ３９１遺伝子座における、まれな短縦列反復（ＳＴＲ）対立遺伝子が開示される。各遺伝子座についての代表的なアレリックラダー、これらの対立遺伝子を用いる方法およびアッセイ、および広い範囲の個人の正確な遺伝子型解析および同定のための、これらの対立遺伝子を含むアレリックラダーを含むキットが提供される。一実施形態において、１つ以上の多型短縦列反復遺伝子座の対立遺伝子変異体である、単離された複数の核酸分子を組み合わせて含むアレリックラダーが提供され、ここで、該多型短縦列反復遺伝子座は、対立遺伝子−７を含むＤ１０Ｓ１２４８および対立遺伝子−１３を含むＤ１２Ｓ３９１のうちの少なくとも１つである。
Patent JP-2013512989-A (JP)
Title: コーティング組成物
IPC: C09D5/03
Filed: 2010-11-10
Abstract: （Ｉ）少なくとも１種の熱硬化性樹脂組成物及び（ＩＩ）少なくとも１種の硬化剤を含む硬化性樹脂組成物であって、粉体コーティングは、高いガラス転移温度と低い吸水率との組み合わせを含む釣り合いのとれた特性を有する、硬化性樹脂組成物。
Patent JP-2013514751-A (JP)
Title: 同期機械を始動する方法
IPC: H02P6/20
Filed: 2010-11-03
Abstract: 本発明は、同期機械を始動する方法に関しており、ここでは設定回転トルクM＿V1をあらかじめ設定し、同期機械の回転数を始動後に適合させる。ここでこの適合は、第１ステップにおいて上記の設定回転トルクM＿V1よりも高い回転トルクM＿H1を設定し、引き続き、第２ステップにおいて回転トルクM＿H1を設定回転トルクM＿V1に減少させることによって行われる。さらに本発明は、同期機械を始動する方法に関しており、ここでは設定回転トルクM＿V1をあらかじめ設定し、同期機械の回転数を始動後に適合させる。ここでこの適合は、第１ステップにおいて上記の設定回転トルクM＿V1よりも高い回転トルクM＿H1を設定することによって行われる。これに続く第２ステップにおいて、この比較的高い回転トルクM＿H1を、上記の設定回転トルクM＿V1より小さい正の値M＿H1aに減少させ、第３のステップにおいて上記の設定回転トルクM＿V1に増大させる。
Patent JP-2013518253-A (JP)
Title: ロケーションアウェア推奨エンジン
IPC: G06F17/30
Filed: 2011-01-21
Abstract: 本明細書で開示する主題はロケーションアウェア推奨エンジンに関する。推奨要求に応答して、ユーザの現在のロケーション、エンティティに関連するロケーション、および/またはアクセス可能性基準に基づいて、関連性のある推奨がランク付けされ得る。
Patent JP-2013517963-A (JP)
Title: ２段階射出成形工程を利用して同じ樹脂層で成形された厚レンズ
IPC: F21W107/10
Filed: 2011-02-01
Abstract: 【課題】本発明は、同じ樹脂を２つの空間に注入する２段射出工程を利用して製作された厚い射出成形レンズを利用する新たな固体状態照明装置を提供する。 【解決手段】本発明は、１次注入時、所定量の溶融樹脂を注入して厚レンズの１番目層を生成する。この層は、モールドゲートと一致する少なくとも２つの長いバッフルを含む。２次注入時、１番目層がモールド空間の一部分となり、同じ材料を１番目層上に注入するが、このとき、他のモールドゲートを通じて前記バッフルの間に注入する。このモールドゲートはバッフルと整列状態をなすため、バッフルに沿って２次注入のための充電経路が形成される。また、モールドの換気を適切に行って気体を取り除くことにより、レンズ内部に気泡が全く生じない。 【選択図】図９
Patent JP-2013519711-A (JP)
Title: カルボシランデンドリマー及び抗ウイルス剤としてのそれらの使用
IPC: C07B61/00
Filed: 2011-02-17
Abstract: 高分子に負の実効電荷を与える、好ましくはアニオン性の基で周辺が官能化されたカルボシラン構造を有する、好ましくはケイ素又はポリフェノール性の多官能コアから合成される高度に分岐された高分子。更に、本発明は、これらの合成手順、並びに抗ウイルス剤、抗細菌剤及び抗真菌剤としてのこれらの使用に関する。 【選択図】なし
Patent JP-2014131917-A (JP)
Title: Adhesive-label-provided container
Inventor: TAKAHASHI SATOSHI
IPC: G09F3/10
Filed: 2013-01-07
Abstract: PROBLEM TO BE SOLVED: To provide an adhesive-label-provided container without use of release paper and a container having excellent design after peeling of an adhesive label.SOLUTION: An adhesive-label-provided container 1 has a peelable varnish layer 13 provided partially on the outside surface and an adhesive seal material 2 covering the peelable varnish layer 13 partially or entirely. The adhesive seal material 2 has a peelable region functioning as an adhesive label 3.
Patent JP-2014133393-A (JP)
Title: Front substrate for touch panel
Inventor: NISHIMA SATORU
IPC: B32B27/18
Filed: 2013-01-11
Abstract: PROBLEM TO BE SOLVED: To provide a front substrate for a touch panel with a hard coat layer having preferable slipperiness.SOLUTION: A front substrate for a touch panel includes a substrate, and a hard coat layer formed on the substrate, wherein the hard coat layer contains a fluorine silicone-based surfactant.
Patent JP-2013065361-A (JP)
Title: Storage medium on which program for lease transaction of, e.g., financial product is recorded and lease transaction system for, e.g., financial product
Inventor: NISHIMAKI MASANOBU
IPC: G06Q40/04
Filed: 2013-01-18
Abstract: PROBLEM TO BE SOLVED: To provide a computer-readable storage medium storing a lease transaction program for financial products and a lease transaction system for financial products, in which lease transaction markets for financial products and/or quasi-financial products are created via computer networks and users can conclude lease transactions between and/or among themselves.SOLUTION: The present invention provides a computer-readable storage medium storing a lease transaction program for financial products, and a lease transaction system for financial products, in which lease transaction markets for financial products and/or quasi-financial products are created via computer networks and users can conclude lease transactions between and/or among themselves.
Patent JP-2014140278-A (JP)
Title: Charging system for vehicle
Inventor: KANEYASU MASAMI
IPC: B60L11/18
Filed: 2013-01-21
Abstract: PROBLEM TO BE SOLVED: To provide a charging system for vehicle which enables a vehicle itself to reduce charging current before interrupting charging of the vehicle.SOLUTION: In the charging system for vehicle including an ordinary charging device 1 and a quick-charging device, the ordinary charging device 1 includes: relay circuits 21, 22 and a control section 20 which perform charge to a vehicle; and control circuits 30, 51 and switching circuit 52 which change a current value by switching a path of current outputted from a connector terminal and cause the vehicle to reduce charging to a storage battery based on the change of the current value in a state that a connector is fixed and a separation operation of the connector is not prepared, according to an operating state of the charging system for vehicle, to the ordinary charging device 1 based on a simulation operation instruction signal indicating a simulation operation that causes the vehicle to perform detection as if the separation operation of the connector is prepared in a state that the separation operation of the connector is not prepared.
Patent JP-2014146856-A (JP)
Title: Camera support device
Inventor: KATO TAIICHIRO
IPC: G03B17/56
Filed: 2013-01-25
Abstract: PROBLEM TO BE SOLVED: To provide a camera support device which is small without regard to the height of a ceiling and easy for an operator to operate intuitively.SOLUTION: A camera support device 100 for supporting a camera by suspending it from a ceiling comprises: a holding mechanism 20 for holding the camera; and a suspending mechanism 30 which is installed at the ceiling to suspend the holding mechanism by using a wire 39 having its distal end connected to the holding mechanism. The suspending mechanism 30 comprises: wire taking-up and feeding means 33 capable of taking-up and feeding the wire 39; and an elastic component 32 which imparts a torque well-balanced with the weights of the camera and the holding mechanism to the wire taking-up and feeding means 33 by elastic distortion.
Patent JP-2013178501-A (JP)
Title: Motor controller and imaging apparatus
Inventor: OTANI KINYO
IPC: H04N5/225
Filed: 2013-01-29
Abstract: PROBLEM TO BE SOLVED: To improve accuracy in detecting the position of a driven portion in a motor controller using a DC motor and a single-phase encoder.SOLUTION: A motor controller is equipped with a counter which counts pulses that a single-phase encoder outputs according to rotation of a DC motor; and a control section which recognizes the amount of rotation of the DC motor on the basis of the number of pulses counted by the counter. After braking of the DC motor (S600), the control section starts application of a predetermined voltage to the DC motor at a first timing before stopping of the DC motor (S603), and stops application of the predetermined voltage at a second timing after the stopping of the DC motor (S605). The control section subtracts the number of pulses occurring after the second timing from the value counted by the counter (S606). The predetermined voltage is a voltage lower than the lowest voltage necessary for driving a driven portion, and is a voltage higher than the lowest voltage necessary for rotating the DC motor against the pull-in force of magnets to a coil in the DC motor.
Patent JP-2014145123-A (JP)
Title: Method of producing high strength steel wire
Inventor: HARAGUCHI AKIRA
IPC: C22C38/00
Filed: 2013-01-30
Abstract: PROBLEM TO BE SOLVED: To provide a method of producing a high strength steel wire that can achieve increase in the productivity of the high strength steel wire without involving expansion of heat treatment equipment or plating treatment quipment.SOLUTION: The method of producing a high strength steel wire includes a pre-wire drawing step of drawing a high-carbon steel wire rod to an intermediate wire diameter to obtain an intermediate wire rod, a final heat treatment and plating step of subjecting the intermediate wire rod to patenting and brass plating to obtain a final heat-treated rod, and a final wire drawing step of drawing the final heat-treated rod to obtain the steel wire. In the final wire drawing step, there is obtained the high strength steel wire that has a diameter Df of 0.10 mm-0.40 mm and satisfies the relationship of the tensile strength Z (MPa) and the diameter Df: Z≥2250-1450logDf. The tensile strength of the final heat-treated rod is adjusted to be 800-1,100 MPa after the final heat treatment and plating step. In the final wire drawing step, the steel wire is drawn to have a true strain of 4.2 or more.
Patent JP-2014150473-A (JP)
Title: Acoustic device
Inventor: ISHIZAKI HIROTOSHI
IPC: H04R1/02
Filed: 2013-02-04
Abstract: PROBLEM TO BE SOLVED: To provide an acoustic device capable of outputting bass sound and suppressing an acoustic echo due to the bass sound even when sound is input to a sound input unit simultaneously with the output of sound.SOLUTION: An acoustic device 1 includes a front side housing 31 and a rear side housing 32. A speaker and a microphone are exposed forward in the front wall part of the front side housing 31. A passive radiator 5 is exposed backward in the rear wall part 54 of the rear side housing 32. An upper side guide part 81 and a lower side guide part 82 extending in a horizontal direction while vertically holding the passive radiator 5 between them are arranged in the rear wall part 54. A vibration suppression member 7 is slidable along the upper side guide part 81 and the lower side guide part 82. Thus, the vibration suppression member 7 is slidable between a suppression position where the vibration of the passive radiator 5 is suppressed and an open position where the vibration is not suppressed.
Patent JP-2014153151-A (JP)
Title: Inner shape measuring device
Inventor: BABA MICHIKO
IPC: G01B5/20
Filed: 2013-02-07
Abstract: PROBLEM TO BE SOLVED: To measure an inner shape of an object to be measured with high accuracy.SOLUTION: The inner shape measuring device is provided with: a swing unit 3; a support base 21 fixed to the swing unit; a first liner guide installed with a rail 22 on the support base orthogonal to a rotary shaft of the swing unit; a second linear guide installed with a block on the support base orthogonal to the rotary shaft; a block of the first linear guide; and a rail 23a of the second linear guide, and includes: a table 24 induced by a rail of the first linear guide and a block of the second linear guide installed on the support base and slidable in a direction orthogonal to the rotary shaft; a displacement gauge disposed in front of the table and measuring an inner shape by contacting the inner shape of the object to be measured; a linear scale including a scale 26a installed on a rear surface of the table and having a scale of the prescribed intervals, and detection means 26b fixed to the support base and detecting a movement distance of the table according to a scale of the scale; and a calculation part for obtaining the inner shape by utilizing a measurement result of the displacement gauge and a detection result of the detection means.
Patent JP-2014151569-A (JP)
Title: Ink jet recording sheet
Inventor: ONDA YURIKO
IPC: B41M5/52
Filed: 2013-02-08
Abstract: PROBLEM TO BE SOLVED: To provide an ink jet recording sheet in which a white sheet part is hard to be yellowed even if it is configured to have ink absorption and image sharpness properties.SOLUTION: In the ink jet recording sheet according to the present invention, at least one face of a base sheet has one or more ink receiving layers having a pigment and a binder, the face provided with the ink receiving layer(s)is used as a measuring face, and its oxidation degradation intensity decided by an extremely feeble emission analysis method is 5,000 photons/s or lower.
Patent JP-2014154798-A (JP)
Title: Semiconductor laser element and laser module
Inventor: IWAI NORIHIRO
IPC: H01S5/022
Filed: 2013-02-13
Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor laser element capable of reducing power consumption.SOLUTION: An n-type clad layer is formed on a substrate. An active layer including a multiquantum well structure and composed of a group III-V compound semiconductor including a group III element as Al is arranged on the n-type clad layer. A current block layer provided with a groove is arranged on the active layer. An optical guide layer is arranged on at least a bottom face of the groove. A p-type clad layer is arranged on the optical guide layer. The effective refractive index of a material filled in the groove is higher than the effective refractive index of the current block layer. The effective refractive index of the n-type clad layer is higher than the effective refractive index of the p-type clad layer.
Patent JP-2014155145-A (JP)
Title: Earphone microphone
Inventor: SHIMIZU NORIYUKI
IPC: H04R19/04
Filed: 2013-02-13
Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive earphone microphone which can be reduced in size and has an echo suppression function.SOLUTION: An earphone microphone includes one speaker, a differential microphone, and a body housing. The differential microphone has first and second sound collection holes. The body housing includes: first and second openings communicating with an outside; a first acoustic space communicating with the first opening; and a second acoustic space communicating with the second opening. Sound to be input to the first sound collection hole is propagated in the first acoustic space. The speaker is arranged in the second acoustic space, and sound to be input to the second sound collection hole is propagated in the second acoustic space. The second acoustic space functions as a Helmholtz resonator with respect to sound to be propagated by way of the second opening.
Patent JP-2014157707-A (JP)
Title: Winding bind
Inventor: MURAKAMI YASUSHI
IPC: H02G7/00
Filed: 2013-02-15
Abstract: PROBLEM TO BE SOLVED: To provide a winding bind which allows winding around an overhead wire and removing from the overhead wire without damaging the sheathings of the overhead wire and the winding bind.SOLUTION: A winding bind 10 is used to bond and support a pin insulator 2 to an overhead wire 1 and comprises: a semi-circular arc part 11 which is smaller in diameter than the overhead wire 1, consists of a coated metal wire and is formed in a bent form in the longitudinal-direction central part of the metal wire so as to be windable around the neck part of a pin insulator; first and second spiral parts 12a and 12b formed in a bent form at both ends of the semi-circular arc part 11; and first and second tubes 13a and 13b each attached to the open ends of the first and second spiral parts 12a and 12b.
Patent JP-2013190421-A (JP)
Title: Method for improving detection of traffic-object position in vehicle
Inventor: NILS EINECKE
IPC: G01S13/931
Filed: 2013-02-15
Abstract: PROBLEM TO BE SOLVED: To provide a method and a system for improving the detection results of an object position sensor like a radar sensor.SOLUTION: The method for detecting a position of a target object (51) in the environment of a host vehicle comprises the steps of: receiving information on a first position (6) relating to the target object by using an object position sensor (2) like e.g. a radar sensor; receiving an image (7) containing the target object detected by an image sensor (3) like e.g. a camera; projecting the first position (6) on the image (7); and refining the first position (6) by computing a refined second position (25) of the target object on the basis of a symmetry search within the image (7).
Patent JP-2014160544-A (JP)
Title: Female terminal fitting
Inventor: CHIGUSA TAKAHIRO
IPC: H01R13/11
Filed: 2013-02-19
Abstract: PROBLEM TO BE SOLVED: To perform backlash stuffing of a male tab and to regulate an elastic contact piece from being excessively bent, without increasing processing man-hours.SOLUTION: Within a main body 20, a flexible elastic contact piece 21 is provided and in the elastic contact piece 21, a protrusion 25 is provided. On a sidewall 23 of the main body 20, a hammered-out part 34 is provided by inward hammering together with a through hole 33 and in the hammered-out part 34, in a portion opposing the protrusion 25 in a bending direction of the elastic contact piece 21, an excessive bend regulation part 36 is provided for regulating the elastic contact piece 21 from being excessively bent. In the hammered-out part 34, in a portion opposite to the excessive bend regulation part 36 with the protrusion 25 interposed therebetween, a backlash stuffing part 35 is provided for regulating displacement of a male tab 91 which is inserted into the main body 20.
Patent JP-2014160110-A (JP)
Title: Driving device, display device, electronic apparatus and driving method
Inventor: SASAKI HITOSHI
IPC: G09G3/20
Filed: 2013-02-19
Abstract: PROBLEM TO BE SOLVED: To reduce a display trouble.SOLUTION: According to a video signal, a driving device drives an electrooptical panel having a plurality of pixels for modulating light from a light source. The driving device includes: driving means configured to repeat, in the driving, a voltage application consisting of a first period for applying voltage of positive polarity and a second period for applying voltage of negative polarity, in which the first period and the second period are different in length; and light source control means configured to control to turn off the light source in part of the longer one of the first period and the second period.
Patent JP-2014158527-A (JP)
Title: Absorbent article
Inventor: HAYASHI NOBUMASA
IPC: A61F13/53
Filed: 2013-02-19
Abstract: PROBLEM TO BE SOLVED: To provide an absorbent article that is designed to achieve cost reduction by using wood pulp fiber as its material, is excellent in absorption speed and is less in an amount of liquid returned.SOLUTION: An absorbent article 200 comprises: a liquid permeable top sheet 202 forming a body-contact-side surface; a liquid-impermeable back sheet 204; and a sheet-like absorbent body 207 arranged between the top sheet and back sheet and formed from an absorption layer 207x having water absorbent resin and adhesive, the absorbent layer 207x being arranged together with core wrap sheets 207a, 207b in layers. In the absorbent article 200, the core wrap sheet is formed from pulp as principal component, is 15 to 45 g/min basis weight, is 60 to 230 water-g/min an amount of water absorption, is not greater than 25.0 sec/0.1 ml prescribed in the former JIS-S3104, is 100 to 600 μm in the height difference between the recess and projection of the surface of the core wrap sheet, and is 2 to 12% in the area rate of a recessed part of the surface.
Patent JP-2014161192-A (JP)
Title: Headset transmitter receiver and power supply control method for headset transmitter receiver
Inventor: SEKINE MASAHIRO
IPC: H04M1/02
Filed: 2013-02-20
Abstract: PROBLEM TO BE SOLVED: To enhance convenience during use of a headset.SOLUTION: When a rotary part 24 of a headset body part 2 is rotated around a rotary fitting part 39 and a fitting guide 24a is positioned on a side "C" at the headset body part 2, a retainer mechanism part 26 is slid downward as shown by an arrow in Fig. 3E. Then a fitting guide groove 26a of the retainer mechanism part 26 comes out of the fitting guide 24a and an ear hook 25 is detached from the headset body part 2. Then the fitting guide 24a is positioned on a side "B" at the headset body part 2 by rotating the rotary part 24 while the ear hook 25 is detached from the headset body part 2, and the fitting guide 24a is fitted into a fitting guide groove 26a of the retainer mechanism part 26, so that the hear hook 25 is fitted on the side "B" of the headset body part 2. Thus, the headset body part 2 can be used while suspended on both pinnas of right and left ears.
Patent JP-2013209788-A (JP)
Title: Cellulose ester-based fiber and fiber structure
Inventor: HAMANAKA SHOGO
IPC: D06M15/643
Filed: 2013-02-25
Abstract: PROBLEM TO BE SOLVED: To provide a cellulose ester fiber that is superior in wear resistance and suitably used for clothing and the like, and to provide a fiber structure formed of the same.SOLUTION: The cellulose ester-based fiber has a coating film of an amino-modified silicone on a surface layer part of the fiber. An average value of the thickness of the coating film is in a range of 10-200 nm. The number of residual hydroxyl groups in cellulose ester is preferably 0.2 to 1.0 per glucose unit. The cellulose ester preferably comprises cellulose acetate propionate and/or cellulose acetate butyrate. An amino group equivalent of the amino-modified silicone is preferably 1,000 to 8,000 g/mol.
Patent JP-2014166073-A (JP)
Title: Transmitter and transmission method
Inventor: TERAI RYOTA
IPC: H04L47/80
Filed: 2013-02-26
Abstract: PROBLEM TO BE SOLVED: To provide a transmitter and transmission method capable of efficiently transmitting data having high importance.SOLUTION: A transmitter (101) comprises: an acquisition unit (121) for acquiring power consumption of each of a plurality of power loads; a communication unit (125) for transmitting data based on the power consumption to a server through a network; and a control unit (127) for acquiring the degree of congestion of the network. The control unit (127) determines the degree of importance of the data on the basis of the degree of congestion, and controls the communication unit (125) so as to preferentially transmit data in descending order of the degree of importance.
Patent JP-2014170790-A (JP)
Title: Fixing member and processing method
Inventor: SAKAMOTO YOSHIYUKI
IPC: H01L21/304
Filed: 2013-03-01
Abstract: PROBLEM TO BE SOLVED: To provide a fixing member which fixes a wafer to be processed, and can be easily removed from the processed wafer.SOLUTION: A fixing member has the same thickness as that of a wafer (W), and is formed into an annular shape having an inner diameter (di2) equal to an outer diameter (dw) of the wafer and an outer diameter (do2) larger than the outer diameter of the wafer, and comprises: an annular shape body (12) having an inner peripheral surface (12c) corresponding to an upper surface side of a chamfer portion (Wc) provided in an outer peripheral edge portion of the wafer; and a disk-shaped rigid plate (11) having an outer diameter (d1) equal to or larger than an outer diameter of the annular shape body. A contact portion (112) having the same shape as that of the annular shape body is provided on a side of an upper surface (11a) of the rigid plate. One of a bottom surface (12b) of the annular shape body and the contact portion of the rigid plate is composed of a material having a magnetic property, and the other thereof is composed of a material to be attracted by magnetic force. The inner peripheral surface of the annular shape body is abutted on the chamfer portion, and the bottom surface of the annular shape body and the chamfer portion of the rigid plate are attracted to each other by magnetic force to hold the wafer.