Harutaka Sekiya
Samsung
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Featured researches published by Harutaka Sekiya.
Japanese Journal of Applied Physics | 1992
Harutaka Sekiya; Shin Kagami
Stability of a focus servo system was studied in a 90 mm magneto-optical (MO) disk drive that uses a separated optical system for high-speed access. The separated optical system had two major problems of focus servo system instability-one is caused by a mechanical feedback (MFB) due to mechanical resonance of a disk and the other is caused by a complex feed-back of both mechanical and optical crosstalks. The mechanisms of these problems are clarified, and high-speed access of less than 30 ms is achieved. In this paper, the mechanisms are discussed and effective solutions are presented.
Archive | 2004
Harutaka Sekiya; Yuichiro Tomishima
Archive | 2004
Harutaka Sekiya
Archive | 2013
Mitsuhiro Togashi; Harutaka Sekiya
Archive | 2006
Harutaka Sekiya; Shin Kagami; Toshiaki Suzuki; Toru Yoshida
Archive | 2012
Harutaka Sekiya; 晴隆 関谷; Mitsuhiro Togashi; 光宏 富樫
international symposium on semiconductor manufacturing | 2011
Harutaka Sekiya
Archive | 2006
Toskiaki Suzuki; Toru Yoshida; Shin Kagami; Harutaka Sekiya
Archive | 1992
Shin Kagami; Harutaka Sekiya; Kazuhiro Adachi
JJAP series | 1992
Harutaka Sekiya; Shin Kagami
