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IEICE Trans

Shuichi NAGASAWA

Planarized Nb 4-Layer Fabrication Process for Superconducting Integrated Circuits and Its Fabricated Device Evaluation
Shuichi NAGASAWA Masamitsu TANAKA Naoki TAKEUCHI Yuki YAMANASHI Shigeyuki MIYAJIMA Fumihiro CHINA Taiki YAMAE Koki YAMAZAKI Yuta SOMEI Naonori SEGA Yoshinao MIZUGAKI Hiroaki MYOREN Hirotaka TERAI Mutsuo HIDAKA Nobuyuki YOSHIKAWA Akira FUJIMAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2021/09/01
Vol. E104-C  No. 9  pp. 435-445
Type of Manuscript:  Special Section PAPER (Special Section on Fabrication of Superconductor Devices; Key Technology in Superconductor Electronics)
Category: 
Keyword: 
superconducting fabrication technology, Nb/AlOx/Nb Josephson junction, caldera planarization, multi-layer structure, single-flux quantum logic, adiabatic quantum flux parametron logic, cell-based design, diagnostic shift-registers, 
 Summary | Full Text:PDF
Fabrication Process for Superconducting Digital Circuits
Mutsuo HIDAKA Shuichi NAGASAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2021/09/01
Vol. E104-C  No. 9  pp. 405-410
Type of Manuscript:  INVITED PAPER (Special Section on Fabrication of Superconductor Devices; Key Technology in Superconductor Electronics)
Category: 
Keyword: 
superconducting integrated circuits, Josephson junction, fabrication process, controllability, uniformity, defect density, 
 Summary | Full Text:PDF
Nb 9-Layer Fabrication Process for Superconducting Large-Scale SFQ Circuits and Its Process Evaluation
Shuichi NAGASAWA Kenji HINODE Tetsuro SATOH Mutsuo HIDAKA Hiroyuki AKAIKE Akira FUJIMAKI Nobuyuki YOSHIKAWA Kazuyoshi TAKAGI Naofumi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/03/01
Vol. E97-C  No. 3  pp. 132-140
Type of Manuscript:  INVITED PAPER (Special Section on Leading-Edge Technology of Superconductor Large-Scale Integrated Circuits)
Category: 
Keyword: 
superconducting fabrication technology, Nb/AlOx/Nb Josephson junction, single flux quantum, planarization, shift register, 
 Summary | Full Text:PDF
Large-Scale Integrated Circuit Design Based on a Nb Nine-Layer Structure for Reconfigurable Data-Path Processors
Akira FUJIMAKI Masamitsu TANAKA Ryo KASAGI Katsumi TAKAGI Masakazu OKADA Yuhi HAYAKAWA Kensuke TAKATA Hiroyuki AKAIKE Nobuyuki YOSHIKAWA Shuichi NAGASAWA Kazuyoshi TAKAGI Naofumi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/03/01
Vol. E97-C  No. 3  pp. 157-165
Type of Manuscript:  INVITED PAPER (Special Section on Leading-Edge Technology of Superconductor Large-Scale Integrated Circuits)
Category: 
Keyword: 
advanced process, cell-based design technique, high-end computing, large-scale integration, rapid single-flux-quantum circuits, 
 Summary | Full Text:PDF
100 GHz Demonstrations Based on the Single-Flux-Quantum Cell Library for the 10 kA/cm2 Nb Multi-Layer Process
Yuki YAMANASHI Toshiki KAINUMA Nobuyuki YOSHIKAWA Irina KATAEVA Hiroyuki AKAIKE Akira FUJIMAKI Masamitsu TANAKA Naofumi TAKAGI Shuichi NAGASAWA Mutsuo HIDAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/04/01
Vol. E93-C  No. 4  pp. 440-444
Type of Manuscript:  Special Section PAPER (Special Section on Frontiers of Superconductive Electronics)
Category: Digital Applications
Keyword: 
single flux quantum circuit, Josephson junction, cell library, adder, 
 Summary | Full Text:PDF
Improvements in Fabrication Process for Nb-Based Single Flux Quantum Circuits in Japan
Mutsuo HIDAKA Shuichi NAGASAWA Kenji HINODE Tetsuro SATOH 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/03/01
Vol. E91-C  No. 3  pp. 318-324
Type of Manuscript:  INVITED PAPER (Special Section on Recent Progress in Superconductive Digital Electronics)
Category: 
Keyword: 
superconductive circuit, Josephson junction, fabrication process, SFQ (Single Flux Quantum) circuit, Nb/AlOx/Nb junction, 
 Summary | Full Text:PDF
Pattern-Size-Free Planarization for Multilayered Large-Scale SFQ Circuits
Kenji HINODE Shuichi NAGASAWA Masao SUGITA Tetsuro SATOH Hiroyuki AKAIKE Yoshihiro KITAGAWA Mutsuo HIDAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/12/01
Vol. E86-C  No. 12  pp. 2511-2513
Type of Manuscript:  LETTER
Category: Superconductive Electronics
Keyword: 
planarization, reversal mask, Nb SFQ, multilevel wiring, 
 Summary | Full Text:PDF
Single Flux Quantum Multistage Decimation Filters
Haruhiro HASEGAWA Tatsunori HASHIMOTO Shuichi NAGASAWA Satoru HIRANO Kazunori MIYAHARA Youichi ENOMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/01/01
Vol. E86-C  No. 1  pp. 2-8
Type of Manuscript:  INVITED PAPER (Special Issue on Superconductor Digital/Analog Circuit Technologies)
Category: LTS Digital Applications
Keyword: 
single flux quantum, sinc filter, decimation filter, Josephson junction, 
 Summary | Full Text:PDF
Design of SFQ Circuits and Their Measurement
Kazunori MIYAHARA Shuichi NAGASAWA Haruhiro HASEGAWA Tatsunori HASHIMOTO Hideo SUZUKI Youichi ENOMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/03/01
Vol. E85-C  No. 3  pp. 603-607
Type of Manuscript:  INVITED PAPER (Special Issue on Superconductive Electronics)
Category: Digital Devices and Their Applications
Keyword: 
AD converter, decimation filter, superconducting memory, SFQ circuit, sigma-delta modulator, 
 Summary | Full Text:PDF
Superconducting Technology for Digital Applications Using Niobium Josephson Junctions
Shuichi TAHARA Hideaki NUMATA Shinichi YOROZU Yoshihito HASHIMOTO Shuichi NAGASAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2000/01/25
Vol. E83-C  No. 1  pp. 60-68
Type of Manuscript:  INVITED PAPER (Special Issue on Superconductive Devices and Systems)
Category: Digital Applications
Keyword: 
Josephson junctions, planarization, moat structure, memory, network, 
 Summary | Full Text:PDF
Josephson Memory Technology
Suichi TAHARA Shuichi NAGASAWA Hideaki NUMATA Yoshihito HASHIMOTO Shinichi YOROZU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/09/25
Vol. E79-C  No. 9  pp. 1193-1199
Type of Manuscript:  INVITED PAPER (Special Issue on Toward Digital and Analog Applications of Superconductors)
Category: Superconductive digital integrated circuits
Keyword: 
Josephson, memory, flux trap, built-in self testing, 
 Summary | Full Text:PDF
A Resistor Coupled Josephson Polarity-Convertible Driver
Shuichi NAGASAWA Shuichi TAHARA Hideaki NUMATA Yoshihito HASHIMOTO Sanae TSUCHIDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1994/08/25
Vol. E77-C  No. 8  pp. 1176-1180
Type of Manuscript:  Special Section PAPER (Special Section on Superconducting Devices)
Category: LTS
Keyword: 
superconductive electronics, Josephson device, driver, low temperature device, 
 Summary | Full Text:PDF