JP7080185B2 - エンハンスメントモードfetドライバic - Google Patents
エンハンスメントモードfetドライバic Download PDFInfo
- Publication number
- JP7080185B2 JP7080185B2 JP2018560037A JP2018560037A JP7080185B2 JP 7080185 B2 JP7080185 B2 JP 7080185B2 JP 2018560037 A JP2018560037 A JP 2018560037A JP 2018560037 A JP2018560037 A JP 2018560037A JP 7080185 B2 JP7080185 B2 JP 7080185B2
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- JP
- Japan
- Prior art keywords
- gate driver
- circuit
- enhancement mode
- fet
- voltage
- 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.)
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- 230000001360 synchronised effect Effects 0.000 claims description 15
- 230000007257 malfunction Effects 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 2
- 230000005669 field effect Effects 0.000 claims 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 43
- 229910002601 GaN Inorganic materials 0.000 description 42
- 239000003990 capacitor Substances 0.000 description 11
- 230000008859 change Effects 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 101150107401 outH gene Proteins 0.000 description 1
- 101150117787 outL gene Proteins 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/06—Modifications for ensuring a fully conducting state
- H03K17/063—Modifications for ensuring a fully conducting state in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/04—Modifications for accelerating switching
- H03K17/0406—Modifications for accelerating switching in composite switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/08—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind
- H01L27/085—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only
- H01L27/088—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/20—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
- H01L29/2003—Nitride compounds
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
- H03K17/223—Modifications for ensuring a predetermined initial state when the supply voltage has been applied in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/0185—Coupling arrangements; Interface arrangements using field effect transistors only
- H03K19/018507—Interface arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/023—Generators characterised by the type of circuit or by the means used for producing pulses by the use of differential amplifiers or comparators, with internal or external positive feedback
- H03K3/0233—Bistable circuits
- H03K3/02337—Bistables with hysteresis, e.g. Schmitt trigger
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/06—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration
- H01L27/0605—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration integrated circuits made of compound material, e.g. AIIIBV
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- General Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Ceramic Engineering (AREA)
- Electronic Switches (AREA)
- Logic Circuits (AREA)
- Dc-Dc Converters (AREA)
Description
Claims (6)
- エンハンスメントモードGaN電界効果トランジスタであるメインFETを駆動する集積ゲートドライバ回路であって、
ゲートドライバと、
前記ゲートドライバへ接続された低電圧誤作動防止回路と
を単一チップに完全に集積されて有し、
前記ゲートドライバは、
供給電圧に等しい論理ハイ又は接地電圧に等しい論理ローを出力する論理インバータ回路と、
前記論理インバータ回路からの論理出力を受け、前記論理ハイの電圧振幅を倍増させたデジタル信号を生成するレベルシフタ回路と、
前記レベルシフタ回路からの前記デジタル信号に応答して前記メインFETを駆動する出力段と
を有し、
前記低電圧誤作動防止回路は、
所定の電圧基準を生成する電圧基準回路と、
前記電圧基準回路の出力を受け、供給電圧が前記所定の電圧基準を下回る場合に前記ゲートドライバの動作を阻止するコンパレータと
を有する、
集積ゲートドライバ回路。 - 当該集積ゲートドライバ回路内の全てのトランジスタは、エンハンスメントモードGaN電界効果トランジスタである、
請求項1に記載の集積ゲートドライバ回路。 - 前記単一チップに集積された前記メインFETを更に有する
請求項2に記載の集積ゲートドライバ回路。 - 前記出力段は、ハイサイド・エンハンスメントモードGaNトランジスタとローサイド・エンハンスメントモードGaNトランジスタとから形成されたハーフブリッジ回路を有し、前記ハイサイド・エンハンスメントモードGaNトランジスタ及び前記ローサイド・エンハンスメントモードGaNトランジスタは、2つの相補入力に従って、互いに反転したスイッチ動作を有している、
請求項1に記載の集積ゲートドライバ回路。 - 前記メインFETの駆動を制御する前記デジタル信号に基づいて、前記メインFETがオン又はオフされるタイミングに対して前記ゲートドライバのターンオン又はターンオフを制御する同期ブートストラップFET供給ゲートドライバ回路を更に有する
請求項1に記載の集積ゲートドライバ回路。 - 前記同期ブートストラップFET供給ゲートドライバ回路は、前記出力段を必要としない点を除いて前記ゲートドライバと同じ構成を有する、
請求項5に記載の集積ゲートドライバ回路。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201662341318P | 2016-05-25 | 2016-05-25 | |
US62/341,318 | 2016-05-25 | ||
PCT/US2017/034461 WO2017205618A1 (en) | 2016-05-25 | 2017-05-25 | Enhancement mode fet gate driver ic |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2019519150A JP2019519150A (ja) | 2019-07-04 |
JP7080185B2 true JP7080185B2 (ja) | 2022-06-03 |
Family
ID=60411907
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2018560037A Active JP7080185B2 (ja) | 2016-05-25 | 2017-05-25 | エンハンスメントモードfetドライバic |
Country Status (7)
Country | Link |
---|---|
US (1) | US10243546B2 (ja) |
JP (1) | JP7080185B2 (ja) |
KR (1) | KR102109851B1 (ja) |
CN (1) | CN109155627B (ja) |
DE (1) | DE112017002655B4 (ja) |
TW (1) | TWI641218B (ja) |
WO (1) | WO2017205618A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11056875B2 (en) * | 2018-02-23 | 2021-07-06 | Maxim Integrated Products, Inc. | Systems and methods for gate driver with field-adjustable UVLO |
CN108768145B (zh) * | 2018-05-25 | 2019-07-02 | 电子科技大学 | 适用于GaN功率开关器件的高速半桥栅驱动电路 |
TWI732280B (zh) * | 2018-08-28 | 2021-07-01 | 美商高效電源轉換公司 | 串級自舉式GaN功率開關及驅動器 |
TWI716980B (zh) * | 2018-08-28 | 2021-01-21 | 美商高效電源轉換公司 | 使用具回授之主動前置驅動器的GaN驅動器 |
US11687110B2 (en) * | 2018-09-26 | 2023-06-27 | Efficient Power Conversion Corporation | Multi-channel pulse current generator with charging |
US10601302B1 (en) | 2019-04-04 | 2020-03-24 | Navitas Semiconductor, Inc. | Bootstrap power supply circuit |
US10454481B1 (en) * | 2019-04-04 | 2019-10-22 | Navitas Semiconductor, Inc | GaN logic circuits |
US11394380B2 (en) | 2019-08-09 | 2022-07-19 | Texas Instruments Incorporated | Gate drivers and auto-zero comparators |
WO2021191726A1 (ja) | 2020-03-27 | 2021-09-30 | 株式会社半導体エネルギー研究所 | 半導体装置、増幅器および電子機器 |
US11489441B2 (en) * | 2020-06-02 | 2022-11-01 | Texas Instruments Incorporated | Reference voltage generation circuits and related methods |
CN113433998B (zh) * | 2021-07-06 | 2022-06-24 | 西安电子科技大学芜湖研究院 | 一种功率驱动器 |
WO2023107885A1 (en) * | 2021-12-08 | 2023-06-15 | Efficient Power Conversion Corporation | Active bootstrapping drivers |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009278386A (ja) | 2008-05-14 | 2009-11-26 | Sony Corp | 半導体デバイス、表示パネル及び電子機器 |
JP2011509629A (ja) | 2008-01-11 | 2011-03-24 | インターナショナル レクティフィアー コーポレイション | 集積iii族窒化物電力変換回路 |
JP2012078839A (ja) | 2011-11-07 | 2012-04-19 | Semiconductor Energy Lab Co Ltd | 表示装置の駆動回路 |
JP2015115953A (ja) | 2013-12-09 | 2015-06-22 | インターナショナル・レクティファイアー・コーポレーションInternational Rectifier Corporation | モノリシック集積ハイサイドブロックおよび電圧変換器 |
US20160079979A1 (en) | 2014-09-16 | 2016-03-17 | Navitas Semiconductor Inc. | Pulsed level shift and inverter circuits for gan devices |
JP2016039440A (ja) | 2014-08-06 | 2016-03-22 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4724342A (en) | 1986-02-12 | 1988-02-09 | Hughes Aircraft Company | Push-pull DCFL driver circuit |
EP0764365A2 (en) * | 1995-04-10 | 1997-03-26 | Koninklijke Philips Electronics N.V. | Level-shifting circuit and high-side driver including such a level-shifting circuit |
US6037720A (en) * | 1998-10-23 | 2000-03-14 | Philips Electronics North America Corporation | Level shifter |
US6859087B2 (en) * | 2002-10-31 | 2005-02-22 | International Rectifier Corporation | Half-bridge high voltage gate driver providing protection of a transistor |
TW200525869A (en) * | 2004-01-28 | 2005-08-01 | Renesas Tech Corp | Switching power supply and semiconductor IC |
JP2008205767A (ja) * | 2007-02-20 | 2008-09-04 | Seiko Epson Corp | レベルシフト回路および電気光学装置 |
JP4525696B2 (ja) * | 2007-04-04 | 2010-08-18 | 三菱電機株式会社 | 電源電圧低下保護回路 |
US8054110B2 (en) * | 2009-01-20 | 2011-11-08 | University Of South Carolina | Driver circuit for gallium nitride (GaN) heterojunction field effect transistors (HFETs) |
KR101057676B1 (ko) * | 2009-04-13 | 2011-08-18 | 실리콘 디스플레이 (주) | 레벨시프터 및 이를 갖는 어레이 기판 |
KR20110037367A (ko) * | 2009-10-06 | 2011-04-13 | 페어차일드코리아반도체 주식회사 | 스위치 구동 회로 및 구동 방법 |
US8581625B2 (en) * | 2011-05-19 | 2013-11-12 | Semiconductor Energy Laboratory Co., Ltd. | Programmable logic device |
JP2013198125A (ja) * | 2012-03-22 | 2013-09-30 | Fujitsu Semiconductor Ltd | 半導体装置 |
US9660639B2 (en) | 2012-12-21 | 2017-05-23 | Gan Systems Inc. | Distributed driver circuitry integrated with GaN power transistors |
EP2800274B1 (en) * | 2013-04-30 | 2017-09-13 | Nxp B.V. | Gate driver circuit |
US9007117B2 (en) | 2013-08-02 | 2015-04-14 | Infineon Technologies Dresden Gmbh | Solid-state switching device having a high-voltage switching transistor and a low-voltage driver transistor |
WO2015135072A1 (en) * | 2014-03-12 | 2015-09-17 | Gan Systems Inc. | Power switching systems comprising high power e-mode gan transistors and driver circuitry |
CN103915990B (zh) | 2014-04-18 | 2016-05-18 | 电子科技大学 | 一种用于GaN功率器件的驱动电路 |
US9559683B2 (en) * | 2014-08-29 | 2017-01-31 | Infineon Technologies Austria Ag | System and method for a switch having a normally-on transistor and a normally-off transistor |
EP3001563B1 (en) * | 2014-09-25 | 2019-02-27 | Nexperia B.V. | A cascode transistor circuit |
US9667245B2 (en) | 2014-10-10 | 2017-05-30 | Efficient Power Conversion Corporation | High voltage zero QRR bootstrap supply |
CN104917467B (zh) * | 2015-06-24 | 2017-08-25 | 江苏博普电子科技有限责任公司 | 一种GaN微波功率放大器用漏极调制电路 |
-
2017
- 2017-05-25 CN CN201780031960.6A patent/CN109155627B/zh active Active
- 2017-05-25 JP JP2018560037A patent/JP7080185B2/ja active Active
- 2017-05-25 TW TW106117466A patent/TWI641218B/zh active
- 2017-05-25 KR KR1020187037100A patent/KR102109851B1/ko active IP Right Grant
- 2017-05-25 US US15/605,219 patent/US10243546B2/en active Active
- 2017-05-25 WO PCT/US2017/034461 patent/WO2017205618A1/en active Application Filing
- 2017-05-25 DE DE112017002655.5T patent/DE112017002655B4/de active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011509629A (ja) | 2008-01-11 | 2011-03-24 | インターナショナル レクティフィアー コーポレイション | 集積iii族窒化物電力変換回路 |
JP2009278386A (ja) | 2008-05-14 | 2009-11-26 | Sony Corp | 半導体デバイス、表示パネル及び電子機器 |
JP2012078839A (ja) | 2011-11-07 | 2012-04-19 | Semiconductor Energy Lab Co Ltd | 表示装置の駆動回路 |
JP2015115953A (ja) | 2013-12-09 | 2015-06-22 | インターナショナル・レクティファイアー・コーポレーションInternational Rectifier Corporation | モノリシック集積ハイサイドブロックおよび電圧変換器 |
JP2016039440A (ja) | 2014-08-06 | 2016-03-22 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
US20160079979A1 (en) | 2014-09-16 | 2016-03-17 | Navitas Semiconductor Inc. | Pulsed level shift and inverter circuits for gan devices |
Also Published As
Publication number | Publication date |
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CN109155627A (zh) | 2019-01-04 |
DE112017002655B4 (de) | 2023-08-24 |
US10243546B2 (en) | 2019-03-26 |
TW201813305A (zh) | 2018-04-01 |
US20170346475A1 (en) | 2017-11-30 |
KR20190009800A (ko) | 2019-01-29 |
CN109155627B (zh) | 2023-04-11 |
JP2019519150A (ja) | 2019-07-04 |
KR102109851B1 (ko) | 2020-05-13 |
TWI641218B (zh) | 2018-11-11 |
DE112017002655T5 (de) | 2019-03-07 |
WO2017205618A1 (en) | 2017-11-30 |
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