| Project/Area Number |
10555122
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
電子デバイス・機器工学
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
KUROKI Yukinori Graduate School of Information Science and Electrical Engineering, Kyushu University, Professor, 大学院・システム情報科学研究科, 教授 (40234596)
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| Co-Investigator(Kenkyū-buntansha) |
ASADA Hironori Faculty of Engineering, Yamaguchi University, Associate Professor, 工学部, 助教授 (70201887)
MATSUYAMA Kimihide Graduate School of Information Science and Electrical Engineering, Kyushu University, Professor, 大学院・システム情報科学研究科, 教授 (80165919)
TANIGUCHI Kenji Kurume Institute of Technology, Professor, 電子情報工学科, 教授 (10217127)
NAKASHI Kenichi Graduate School of Information Science and Electrical Engineering, Kyushu University, Associate Professor, 大学院・システム情報科学研究科, 助教授 (50237252)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥12,700,000 (Direct Cost: ¥12,700,000)
Fiscal Year 1999: ¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 1998: ¥6,300,000 (Direct Cost: ¥6,300,000)
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| Keywords | Magnetic Storage Device / Signal Processing / Magnetic device / Magnetic Recording / Integrated Circuit / Transistor modeling / GMR |
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| Research Abstract |
In this study, development of a novel magnetic read head to increase read-out signal amplitude, namely, a new magnetic devices using high efficiency magneto-electric conversion characteristics using spin polarized electrons in magnetic transition metal, and device materials and fabrication process technology to realize this new device, and a new signal processing technology for recovering data sequence from ultra-low amplitude and low s/n read-out signal with inter-symbol-interfer and integrating this signal processing technology into silicon integrated circuits are performed. Object of this study is to establish fundamental technologies such as (A) Development of quantum effect type ultra-high sensitivity micro-magnetic magneto-electric conversion device, (B) Optimization of device materials and fabrication, (C) Analog/digital mixed signal processing circuits and system, and design of VLSI, (D) Device modeling for VLSI, to realize next-generation ultra-high density magnetic recording system.
Following results are obtained, (A) A new static bias type gmr head in which thickness of non-magnetic layer is optimized and permanent magnetic layer is integrated are proposed and developed, (B) A new method to apply magnetic bias even to sub-micron-structured gmr film using high coercivity and high saturation copt (cobalt plutinum) film as permanent magnetic layer pattern, are confirmed, (C) Magneto-resistance of 20% high enough is obtained, (D) PLL and viterbi decoder are designed for integrated circuits. The PLL can run up to 600MHz. And area of the viterbi can be reduced about 50%. (E) A new device model for 0.6um and 6um mosfet is proposed.
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