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Paper Abstract and Keywords
Presentation 2017-11-30 15:50
Low-damage etching of nitride semiconductors utilizing photo-electrochemical reactions for electron devices
Keisuke Uemura, Satoru Matsumoto, Masachika Toguchi, Keisuke Ito, Taketomo Sato (Hokkaido Univ.) ED2017-54 CPM2017-97 LQE2017-67 Link to ES Tech. Rep. Archives: ED2017-54 CPM2017-97 LQE2017-67
Abstract (in Japanese) (See Japanese page) 
(in English) The photo-electrochemical oxidation and etching process was demonstrated in view of the damage-free etching for GaN and related materials. The photo-electrochemical oxidation was selectively conducted on the opened area of the SiO2-masked GaN surface. The Ga-oxide films were easily removed by the alkaline-treatments, where lower-damaged surface was obtained as compared with the surface obtained after the conventional dry-etching. Such low-damage etching process was very useful to fabricate the recessed-gate structure in AlGaN/GaN HEMTs. The threshold-voltage of HEMTs was precisely controlled with the etching depth with accuracy in a nanometer-range.
Keyword (in Japanese) (See Japanese page) 
(in English) GaN / AlGaN/GaN HEMT / electrochemical oxidation / wet etching / recessed-gate / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 331, ED2017-54, pp. 23-26, Nov. 2017.
Paper # ED2017-54 
Date of Issue 2017-11-23 (ED, CPM, LQE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF ED2017-54 CPM2017-97 LQE2017-67 Link to ES Tech. Rep. Archives: ED2017-54 CPM2017-97 LQE2017-67

Conference Information
Committee LQE CPM ED  
Conference Date 2017-11-30 - 2017-12-01 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Inst. tech. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Nitride Semiconductor Devices, Materials, Related Technologies 
Paper Information
Registration To ED 
Conference Code 2017-11-LQE-CPM-ED 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Low-damage etching of nitride semiconductors utilizing photo-electrochemical reactions for electron devices 
Sub Title (in English)  
Keyword(1) GaN  
Keyword(2) AlGaN/GaN HEMT  
Keyword(3) electrochemical oxidation  
Keyword(4) wet etching  
Keyword(5) recessed-gate  
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1st Author's Name Keisuke Uemura  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Satoru Matsumoto  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
3rd Author's Name Masachika Toguchi  
3rd Author's Affiliation Hokkaido University (Hokkaido Univ.)
4th Author's Name Keisuke Ito  
4th Author's Affiliation Hokkaido University (Hokkaido Univ.)
5th Author's Name Taketomo Sato  
5th Author's Affiliation Hokkaido University (Hokkaido Univ.)
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Speaker Author-1 
Date Time 2017-11-30 15:50:00 
Presentation Time 25 minutes 
Registration for ED 
Paper # ED2017-54, CPM2017-97, LQE2017-67 
Volume (vol) vol.117 
Number (no) no.331(ED), no.332(CPM), no.333(LQE) 
Page pp.23-26 
#Pages
Date of Issue 2017-11-23 (ED, CPM, LQE) 


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