1
Sumio Hosaka, Atsushi Kikugawa, Yukio Honda, Hajime Koyanagi, Shigeyuki Hosoki, Tsuyoshi Hasegawa: Surface observing apparatus and method. Hitachi, Antonelli Terry Stout & Kraus, July 25, 1995: US05436448 (56 worldwide citation)

A surface observing apparatus for obtaining information of a specimen comprises a probe disposed in the close vicinity of the specimen, a deformable cantilever for holding the probe, a scanning mechanism for scanning a surface of the specimen with the probe and a detector for detecting displacements ...


2
Masaaki Futamoto, Kazuetsu Yoshida, Yukio Honda, Yoshiyuki Hirayama, Atsushi Kikugawa: Perpendicular magnetic recording media, magnetic recording apparatus. Hitachi, Antonelli Terry Stout & Kraus, February 3, 2004: US06686070 (45 worldwide citation)

A perpendicular magnetic recording medium which has been improved to be suitable for high-density magnetic recording and a magnetic recording apparatus using the medium are provided. The magnetic back film of a dual-layer perpendicular recording medium is caused to be constituted by a plurality of l ...


3
Masakazu Ichikawa, Shigeyuki Hosoki, Fumihiko Uchida, Shigeo Kato, Yoshihisa Fujisaki, Sumiko Fujisaki, Atsushi Kikugawa, Ryo Imura, Hajime Aoi, Kiyokazu Nakagawa, Eiichi Murakami: Surface atom fabrication method and apparatus. Hitachi, Fay Sharpe Beall Fagan Minnich & McKee, May 16, 1995: US05416331 (37 worldwide citation)

A fine-fabrication method of solid surfaces relates to a new surface fabrication method allows a solid-device surface to be fabricated at an atomic scale so as to produce an ultra-fine device or a device for recording information at an ultra-high density. A probe is installed with a tip thereof faci ...


4
Sumio Hosaka, Atsushi Kikugawa, Yukio Honda, Hajime Koyanagi, Kiyosi Nagasawa: Scanning probe microscope and method of control error correction. Hitachi, Hitachi Construction Machinery, Antonelli Terry Stout & Kraus, November 21, 1995: US05467642 (21 worldwide citation)

A scanning probe microscope in which the deflection of a cantilever caused by the proximity between a stylus and a sample is detected, the relative distance between the sample and a probe at which the level of the deflection detection signal coincides with a reference level is subjected to servo con ...


5
Masakazu Ichikawa, Shigeyuki Hosoki, Fumihiko Uchida, Shigeo Kato, Yoshihisa Fujisaki, Sumiko Fujisaki, Atsushi Kikugawa, Ryo Imura, Hajime Aoi, Kiyokazu Nakagawa, Eiichi Murakami: Surface atom fabrication method and apparatus. Hitachi, Fay Sharpe Beall Fagan Minnich & McKee, November 18, 1997: US05689494 (15 worldwide citation)

A fine-fabrication method of solid surfaces relates to a new surface fabrication method allows a solid-device surface to be fabricated at an atomic scale so as to produce an ultra-fine device or a device for recording information at an ultra-high density. A probe is installed with a tip thereof faci ...


6
Atsushi Kikugawa, Hiroyuki Minemura: Optical disk apparatus and playback signal processing method. Hitachi, Hitachi LG Data Storage, Antonelli Terry Stout & Kraus, December 14, 2010: US07852722 (13 worldwide citation)

Provided is an optical disk apparatus which has high read retry ability and high compatibility by performing a proper verify for other apparatuses. The optical disk apparatus includes a playback system capable of arbitrarily changing playback performance, and means which detects and determines a fac ...


7
Kiwamu Tanahashi, Atsushi Kikugawa, Noboru Shimizu, Yukio Honda, Yuzuru Hosoe: Perpendicular magnetic recording media, manufacturing process of the same, and magnetic storage apparatus using the same. Hitachi, Stanley P Fisher Esq, Juan Carlos A Marquez Esq, Reed Smith, April 20, 2004: US06723457 (13 worldwide citation)

Provided are a double-layer perpendicular magnetic recording medium having a high medium S/N at an areal recording density of 50 Gbits or more per square inch, and a magnetic storage apparatus having excellent reliability with a low error rate. The perpendicular magnetic recording medium is formed b ...


8
Atsushi Kikugawa, Hiroyuki Minemura: Information read device and read signal processing circuit. Hitachi, Antonelli Terry Stout & Kraus, January 27, 2009: US07483478 (12 worldwide citation)

An optical disk read signal processing system for Blu-ray disc systems to ensure stable phase-locked locked operation even with a low signal-to-noise ratio. This system changes a loop configuration of a phase lock loop circuit according to the operating state, and utilizes a FIR equalizer for phase ...


9

10
Kiwamu Tanahashi, Reiko Arai, Atsushi Kikugawa: Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic storage apparatus using the same. Hitachi, Mattingly Stanger Malur & Brundidge P C, December 26, 2006: US07153596 (7 worldwide citation)

A soft magnetic underlayer includes a first amorphous soft magnetic layer to which an exchange bias magnetic field is applied directly from an antiferromagnetic layer or via a ferromagnetic layer, and a second amorphous soft magnetic layer which is formed on the first amorphous soft magnetic layer v ...



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