WO2000036657A1 - Piezoelektrischer aktor - Google Patents
Piezoelektrischer aktor Download PDFInfo
- Publication number
- WO2000036657A1 WO2000036657A1 PCT/DE1999/003873 DE9903873W WO0036657A1 WO 2000036657 A1 WO2000036657 A1 WO 2000036657A1 DE 9903873 W DE9903873 W DE 9903873W WO 0036657 A1 WO0036657 A1 WO 0036657A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- actuator
- piezoelectric actuator
- actuator body
- piezoelectric
- heat sink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
Definitions
- the invention is based on a piezoelectric actuator, in particular for actuating control valves or injection valves on internal combustion engines in motor vehicles, with a piezoelectric actuator body, in particular in the form of a multi-layer laminate of layers of piezoelectric material stacked on top of one another and metallic or electrically conductive layers in between, serving as electrodes, one of which being a the end faces of the actuator body is fixed to a heat-conducting or metallic actuator foot.
- Such a piezoelectric actuator is known for example from DE 196 50 900 AI from Robert Bosch GmbH.
- piezoelectric actuators can be used, for example, for injection valves in a motor vehicle engine and in brake systems with an anti-lock braking system and anti-slip controls.
- Such injection valves equipped with piezoelectric actuators have an injection nozzle controlled by a plunger-like closure element.
- a nozzle-side active surface is arranged on the tappet, which is dependent on the pressure of the the fuel supplied to the nozzle is acted upon, the pressure forces trying to urge the tappet in the opening direction of the closure member.
- the plunger protrudes into a control chamber with a plunger-like end, the cross section of which is larger than the aforementioned active surface.
- the thorn effective pressure tries to move the plunger in the closing direction of the closure member.
- the control chamber is connected to the fuel supply under high pressure via an inlet throttle and to an only low pressure fuel return line via an outlet valve which is generally throttled or combined with an outlet throttle.
- piezoelectric actuators can switch faster.
- the ceramic materials of the piezoceramic have poor thermal conductivity, long actuators whose length is longer than theirs Width, the derivation within the actuator body consisting essentially of ceramic material is unfavorable.
- a piezoelectric actuator according to the invention thus avoids overheating due to the power loss of the same, does not require liquid cooling media and does not require the seals and coolant paths required for this, so that leakage of such coolants is not possible and the assembly of the piezoelectric actuator is simplified and it can thus be manufactured inexpensively .
- the invention resides in the fact that at least one heat sink with good thermal conductivity is connected to the side surfaces of the actuator body and to the actuator base in a highly heat conductive manner.
- the electrical leads to the metallic or electrically conductive electrodes of the actuator body which is designed as a multilayer laminate, are guided to the actuator body only on two sides thereof, so that the two other opposite side surfaces of the actuator body remain free and can be connected to the heat sink or the heat sinks with good thermal conductivity.
- the heat sink or heatsinks preferably consist of metal, particularly preferably of copper. Either two separate heat sinks or a single U-shaped heat sink, which is designed so that it is connected at the bottom portion of its U-shape to the front side of the actuator body facing the actuator foot, with the two opposite side surfaces of the
- thermally conductive adhesive consists, for example, of a silicone elastomer, which is optionally filled with an electrically insulating, thermally conductive filler, for example with AlN or Al 2 0 3 .
- the expansion or shrinkage of the actuator body caused when the electrical voltage is applied can be carried out without tearing the elastic, thermally conductive adhesive, the portions of the heat sink or the heat sink adjacent to the side surfaces of the actuator body can be undulating, that is to say in the form of a metallic wavy band.
- the heat sink or heatsinks are soldered or welded to the actuator base or alternatively connected to the same by a silver conductive adhesive. As a result, the heat loss generated by the piezoelectric actuator is safely dissipated from the heat sink to the heat-conducting actuator foot.
- the two end faces of which are pretensioned by a band spring, which are located along the side surfaces not covered by the heat sinks and at a distance from the actuator body, it is advisable to also use the band springs for heat dissipation, since these are also fixed on the actuator foot.
- the gaps between the actuator body and the band springs are filled with thermally conductive elastomer, optionally with the addition of a thermally conductive filler.
- the electrical connections of the electrodes of the piezoelectric actuator body can also be used for heat dissipation if these electrical connection lines have a sufficiently large line cross section.
- heat sink or heatsinks are only exemplary and that other expedient shapes, for example in the case of actuator bodies with a round cross section, can be used.
- Figure 1 shows schematically and in the form of a partial section a first embodiment of a piezoelectric actuator
- FIG. 2 shows a cross section through the embodiment of the piezoelectric actuator according to the invention shown in FIG. 1 along the sectional plane II - II, and
- FIG. 3.1-3.5 shows various further embodiments of the heat sink provided according to the invention.
- Embodiments in the first exemplary embodiment of a piezoelectric actuator according to the invention shown as a partial section in the longitudinal direction in FIG Ring flange 10 and an actuator base 6 clamped by two corrugated spring strips 8.
- the actuator body 1 with the corrugated spring straps 8 is seated in a metallic housing 3, on the underside of which terminals are connected for connection to electrode leads 7.
- the actuator body 1 When the actuator body 1 is subjected to a pulsating electrical voltage at its electrodes, it performs pulsating strokes analogously, changing the distance between its end faces clamped between the ring flange 10 and the actuator foot 6 by the spring strips 8.
- the heat generated during operation of the actuator can only be dissipated upward to a small extent through the ring flange 10 and the extension 12 of the plunger plate located underneath.
- the dissipation of the heat within the ceramic of the actuator body 1 is unfavorable.
- a metallic heat sink 5 which is preferably made of copper, is connected to the side faces of the actuator body 1 and to the actuator base 6 with good heat conductivity.
- this good heat-conducting connection is implemented by a soldered or welded seam 11.
- the same heat sink 5 is attached on the opposite side of the actuator body 1, which in Figure 1 is not visible.
- the spaces between the perpendicular to the plane of the actuator body 1 and the spring bands 8 are filled with a thermally conductive elastomer 9, to which a thermally conductive filler is added.
- the heat is additionally dissipated through the spring band 8 to the actuator base 6, to which the band springs 8 are connected in a heat-conducting manner.
- FIG. 2 of the exemplary embodiment shown in FIG. 1 along the sectional plane II-II shown in FIG. 1 shows that the heat sink 5 has two opposite side faces of the
- Actuator body 1 which here has a square cross section, are glued by an elastic, thermally conductive adhesive 4.
- This thermally conductive adhesive 4 consists, for example, of silicone elastomer which is filled with a thermally conductive filler. Silicone elastomer has the advantage that it is highly elastic and thus elastically compensates for the strokes of the actuator body 1.
- the cross-sectional view in FIG. 2 also shows that the electrode feed lines 7.1, 7.2 lead to the side surfaces of the actuator body 1, which are not covered by the heat sink 5.
- Actuator base 6 arises, can vary, which is explained below with reference to FIGS. 3A-3E.
- a left heat sink 5.1 and a right heat sink 5.2 are connected to the actuator base 6 in a heat-conducting manner by a soldered or welded connection 11.
- a left heat sink 5.1 and a right heat sink 5.2 are each connected in a heat-conducting manner to the actuator foot 6 by a soldered or welded connection 11, but the lower sections of the heat sinks 5.1, 5.2 are angled outwards.
- the exemplary embodiment shown in FIG. 3D differs from those described so far in that two
- Heat sinks 5.1 and 5.2 are connected in a heat-conducting manner to the actuator base 6 by silver conductive adhesive 13.
- a left heat sink 5.1 and a right heat sink 5.2 are in
- an elastic, thermally conductive adhesive for example silicone elastomer, can be used to connect the or the
- This silicone elastomer adhesive can be filled with heat-conductive filler.
- the Band springs 8 are used for lateral heat dissipation from the actuator body 1 by filling the spaces between the actuator body 1 and the spring band 8 with thermally conductive elastomer.
- the electrode lines 7 can also be used as a further additional heat dissipation option, provided that they have a sufficiently large cable cross section.
- a piezoelectric actuator designed according to the invention can be used, for example, to actuate the injection valves for a common rail injection in diesel passenger cars or commercial vehicles.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/622,027 US6333587B1 (en) | 1998-12-11 | 1999-12-03 | Piezoelectric actuator |
| EP99964392A EP1053569A1 (de) | 1998-12-11 | 1999-12-03 | Piezoelektrischer aktor |
| KR1020007008792A KR20010040885A (ko) | 1998-12-11 | 1999-12-03 | 압전 액추에이터 |
| JP2000588814A JP2002532658A (ja) | 1998-12-11 | 1999-12-03 | 圧電式のアクチュエータ |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19857247A DE19857247C1 (de) | 1998-12-11 | 1998-12-11 | Piezoelektrischer Aktor |
| DE19857247.6 | 1998-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000036657A1 true WO2000036657A1 (de) | 2000-06-22 |
Family
ID=7890781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1999/003873 Ceased WO2000036657A1 (de) | 1998-12-11 | 1999-12-03 | Piezoelektrischer aktor |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6333587B1 (de) |
| EP (1) | EP1053569A1 (de) |
| JP (1) | JP2002532658A (de) |
| KR (1) | KR20010040885A (de) |
| DE (1) | DE19857247C1 (de) |
| WO (1) | WO2000036657A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2842354A1 (fr) * | 2002-07-12 | 2004-01-16 | Bosch Gmbh Robert | Composant piezo-electrique |
| WO2007128764A1 (de) * | 2006-05-08 | 2007-11-15 | Continental Automotive Gmbh | Piezo-aktor, verfahren zum herstellen eines piezo-aktors und einspritzsystem mit einem solchen |
Families Citing this family (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19914411A1 (de) * | 1999-03-30 | 2000-10-12 | Bosch Gmbh Robert | Piezoelektrischer Aktor |
| DE19928176A1 (de) * | 1999-06-19 | 2001-01-04 | Bosch Gmbh Robert | Piezoaktor |
| US20010033125A1 (en) * | 2000-04-20 | 2001-10-25 | Tokin Corporation | Multilayer piezoelectric actuator device having a conductive member attached to an external electrode thereof |
| DE10025997A1 (de) * | 2000-05-25 | 2001-12-06 | Bosch Gmbh Robert | Piezoaktor |
| DE60142818D1 (de) * | 2000-05-31 | 2010-09-30 | Denso Corp | Piezoelektrisches Bauelement für eine Einspritzvorrichtung |
| DE10048430A1 (de) * | 2000-09-29 | 2002-04-25 | Bosch Gmbh Robert | Piezoelektrischer Aktor |
| DE10211107A1 (de) * | 2001-07-12 | 2003-02-13 | Ceramtec Ag | Monolithischer Vielschichtaktor in einem Gehäuse |
| DE10230032A1 (de) * | 2002-07-04 | 2004-01-22 | Daimlerchrysler Ag | Piezoelektrischer Aktor für umströmende Medien sowie Verwendung eines entsprechenden piezoelektrischen Aktors |
| DE10233906A1 (de) * | 2002-07-25 | 2004-02-19 | Siemens Ag | Einspritzmodul |
| DE10259801A1 (de) * | 2002-12-19 | 2004-07-01 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
| US7235916B2 (en) * | 2004-06-03 | 2007-06-26 | Zippy Technology Corp. | Piezoelectric blades anchoring structure |
| JP4786326B2 (ja) * | 2004-12-20 | 2011-10-05 | Next I&D株式会社 | 液滴射出装置 |
| DE102005013912A1 (de) * | 2005-03-24 | 2006-09-28 | Siemens Ag | Piezoaktor |
| JP4793568B2 (ja) * | 2005-07-08 | 2011-10-12 | セイコーエプソン株式会社 | アクチュエータ装置、液体噴射ヘッド及び液体噴射装置 |
| DE102005046174B4 (de) * | 2005-09-27 | 2008-12-04 | Siemens Ag | Spannfeder |
| DE102006018032A1 (de) * | 2006-04-19 | 2007-10-31 | Robert Bosch Gmbh | Aktormodul |
| DE102006026152A1 (de) * | 2006-06-06 | 2007-12-13 | Robert Bosch Gmbh | Anordnung mit einem beschichteten Piezoaktor |
| DE102006043027A1 (de) * | 2006-09-13 | 2008-03-27 | Epcos Ag | Verspannelement und Piezoaktor mit dem Verspannelement |
| DE102006047606A1 (de) * | 2006-10-09 | 2008-04-10 | Robert Bosch Gmbh | Aktormodul mit einem umhüllten Piezoaktor |
| DE102006051325A1 (de) * | 2006-10-31 | 2008-05-08 | Robert Bosch Gmbh | Anordnung eines Piezoaktors in einer Hülse eines Piezoaktormoduls |
| US20090134240A1 (en) * | 2007-11-27 | 2009-05-28 | Caterpillar Inc. | Method of making piezoelectrically actuated device |
| US8100346B2 (en) | 2007-11-30 | 2012-01-24 | Caterpillar Inc. | Piezoelectric actuator with multi-function spring and device using same |
| DE102009038153A1 (de) * | 2009-08-20 | 2011-07-28 | Continental Automotive GmbH, 30165 | Optimierte Aktuatoreinheit für ein Einspritzventil |
| US8324785B2 (en) * | 2009-11-10 | 2012-12-04 | The Regents Of The University Of California | Piezoelectric actuators |
| WO2012026564A1 (ja) * | 2010-08-26 | 2012-03-01 | 京セラ株式会社 | 圧電アクチュエータ |
| KR101195531B1 (ko) | 2011-03-18 | 2012-10-30 | 숭실대학교산학협력단 | 열전소자를 구비한 피에조 인젝터 |
| JP5717869B2 (ja) * | 2011-10-31 | 2015-05-13 | 京セラ株式会社 | 圧電アクチュエータ |
| JP6029063B2 (ja) * | 2013-01-25 | 2016-11-24 | 秋田県 | 並進機構を用いたアクチュエータの減衰方法およびアクチュエータ |
| KR102791160B1 (ko) | 2018-05-11 | 2025-04-07 | 매튜 인터내셔널 코포레이션 | 제팅 조립체에 사용되는 마이크로-밸브를 밀봉하는 시스템 및 방법 |
| US11794476B2 (en) | 2018-05-11 | 2023-10-24 | Matthews International Corporation | Micro-valves for use in jetting assemblies |
| US10994535B2 (en) | 2018-05-11 | 2021-05-04 | Matthews International Corporation | Systems and methods for controlling operation of micro-valves for use in jetting assemblies |
| US11639057B2 (en) | 2018-05-11 | 2023-05-02 | Matthews International Corporation | Methods of fabricating micro-valves and jetting assemblies including such micro-valves |
| US11186084B2 (en) * | 2018-05-11 | 2021-11-30 | Matthews International Corporation | Electrode structures for micro-valves for use in jetting assemblies |
| DE102019110736B4 (de) * | 2019-04-25 | 2022-12-01 | Pi Ceramic Gmbh | Aktuator |
| BR112022008418A2 (pt) | 2019-11-01 | 2022-07-19 | Matthews Int Corp | Sistema de deposição sem contato e dispositivo de interface tátil |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5295288A (en) * | 1992-02-18 | 1994-03-22 | Caterpillar Inc. | Method of making coating surrounding a piezoelectric solid state motor stack |
| DE19626671C1 (de) * | 1996-07-03 | 1997-10-16 | Fraunhofer Ges Forschung | Piezoelektrischer Leistungsaktor mit Kühlung und Verfahren zu seiner Herstellung |
| DE19650900A1 (de) * | 1996-12-07 | 1998-06-10 | Bosch Gmbh Robert | Piezoelektrischer Aktuator |
| JPH11214760A (ja) * | 1998-01-29 | 1999-08-06 | Kyocera Corp | 積層型圧電アクチュエータ |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3598506A (en) * | 1969-04-23 | 1971-08-10 | Physics Int Co | Electrostrictive actuator |
| US4011474A (en) * | 1974-10-03 | 1977-03-08 | Pz Technology, Inc. | Piezoelectric stack insulation |
| US4752712A (en) * | 1985-06-10 | 1988-06-21 | Nippon Soken, Inc. | Piezoelectric laminate stack |
| JPS6427228A (en) * | 1987-03-25 | 1989-01-30 | Oki Electric Ind Co Ltd | Forming method for fine pattern of semiconductor element |
| JP2893736B2 (ja) * | 1989-07-27 | 1999-05-24 | 日本電気株式会社 | 圧電素子の熱膨張特性安定化法 |
| JP2508321B2 (ja) * | 1989-12-04 | 1996-06-19 | 日本電気株式会社 | 圧電アクチュエ―タおよびその製造方法 |
| JP2545639B2 (ja) * | 1990-07-30 | 1996-10-23 | 富士通株式会社 | 積層型圧電素子 |
| DE4113667A1 (de) * | 1991-04-26 | 1992-11-05 | Fraunhofer Ges Forschung | Piezo-stellantrieb |
| JPH05218519A (ja) * | 1992-02-03 | 1993-08-27 | Nec Corp | 電歪効果素子 |
| JPH08172227A (ja) * | 1994-12-19 | 1996-07-02 | Sumitomo Metal Ind Ltd | 積層型圧電アクチュエータ及びその製造方法 |
| JP3506609B2 (ja) * | 1998-06-30 | 2004-03-15 | 京セラ株式会社 | 積層型圧電アクチュエータ |
| JP2000134958A (ja) * | 1998-10-29 | 2000-05-12 | Kyocera Corp | 圧電アクチュエータ装置 |
-
1998
- 1998-12-11 DE DE19857247A patent/DE19857247C1/de not_active Expired - Lifetime
-
1999
- 1999-12-03 KR KR1020007008792A patent/KR20010040885A/ko not_active Withdrawn
- 1999-12-03 WO PCT/DE1999/003873 patent/WO2000036657A1/de not_active Ceased
- 1999-12-03 US US09/622,027 patent/US6333587B1/en not_active Expired - Fee Related
- 1999-12-03 JP JP2000588814A patent/JP2002532658A/ja active Pending
- 1999-12-03 EP EP99964392A patent/EP1053569A1/de not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5295288A (en) * | 1992-02-18 | 1994-03-22 | Caterpillar Inc. | Method of making coating surrounding a piezoelectric solid state motor stack |
| DE19626671C1 (de) * | 1996-07-03 | 1997-10-16 | Fraunhofer Ges Forschung | Piezoelektrischer Leistungsaktor mit Kühlung und Verfahren zu seiner Herstellung |
| DE19650900A1 (de) * | 1996-12-07 | 1998-06-10 | Bosch Gmbh Robert | Piezoelektrischer Aktuator |
| JPH11214760A (ja) * | 1998-01-29 | 1999-08-06 | Kyocera Corp | 積層型圧電アクチュエータ |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 1999, no. 13 30 November 1999 (1999-11-30) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2842354A1 (fr) * | 2002-07-12 | 2004-01-16 | Bosch Gmbh Robert | Composant piezo-electrique |
| WO2007128764A1 (de) * | 2006-05-08 | 2007-11-15 | Continental Automotive Gmbh | Piezo-aktor, verfahren zum herstellen eines piezo-aktors und einspritzsystem mit einem solchen |
| US7808160B2 (en) | 2006-05-08 | 2010-10-05 | Continental Automotive Gmbh | Piezoactuator, method for producing a piezoactuator and injection system of said piezoactuator |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010040885A (ko) | 2001-05-15 |
| EP1053569A1 (de) | 2000-11-22 |
| US6333587B1 (en) | 2001-12-25 |
| DE19857247C1 (de) | 2000-01-27 |
| JP2002532658A (ja) | 2002-10-02 |
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| AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP KR US |
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