公开(公告)号：JP2001118346A

公开(公告)日：2001-04-27

申请号：JP29290999

申请日：1999-10-14

Applicant: IBM

Inventor： TAKEUCHI MASAYUKI ,  SATO MASAHIKO

IPC: G11B21/08 ,  G11B19/02

Abstract: PROBLEM TO BE SOLVED: To provide a disk drive device capable of suppressing the generation of noise in the case of recording and reproducing AV data and its controlling method. SOLUTION: This device sets an actuator control condition corresponding to the seek distance of a magnetic head, decides a distance when the magnetic head actually seeks and controls the actuator with the control condition corresponding the distance by controlling the seek of the magnetic head in the case of reading information recorded on a magnetic disk or writing information on the magnetic disk. For instance, the control shown in the diagram S1 is executed in the case of short stroke seek, the control shown in the diagram S2 is executed in the case of middle stroke seek, and the control shown in the diagram S3 is carried out in the case of long stroke seek.

公开(公告)号：JP2003059216A

公开(公告)日：2003-02-28

申请号：JP2001247394

申请日：2001-08-16

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーション

Inventor： TAKEUCHI MASAYUKI ,  NAKAGAWA YUZO ,  FUKUSHIMA YUKIO ,  UEDA TETSUO

IPC: G11B21/12 ,  G11B5/55 ,  G11B21/08

CPC classification number: G11B5/5526

Abstract: PROBLEM TO BE SOLVED: To provide a hard disk drive that copes with various causes to occurrence of runaway of a magnetic head.
SOLUTION: The hard disk drive is provided with a magnetic disk 2 on which servo information is stored, the magnetic head 4 that seeks on the magnetic disk 2 and reads or writes data while staying at a prescribed position, a voice coil motor 6 that moves the magnetic head 4 onto a prescribed position of the magnetic disk 2, and a position control means that supplies a drive current to the voice coil motor 6 on the basis of the servo information read by the magnetic head 4. The position control means is provided with a CPU 12 that outputs a speed control variable on the basis of the servo information, a DAC (digital/analog converter) 7, a VCM (Voice Coil Motor) driver 8, and a controller 10 that limits a drive speed of the voice coil motor 6 when a deviation is caused in an output timing of the speed control variable.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：提供一种硬盘驱动器，其可以处理磁头失控的各种原因。 解决方案：硬盘驱动器设置有存储有伺服信息的磁盘2，在磁盘2上寻找并在停留在规定位置时读取或写入数据的磁头4，移动的音圈电动机6 磁头4到磁盘2的指定位置，以及位置控制装置，其基于由磁头4读取的伺服信息，向音圈电机6提供驱动电流。位置控制装置 具有基于伺服信息输出速度控制变量的CPU12，限制声音的驱动速度的DAC（数字/模拟转换器）7，VCM（音圈线圈电动机）驱动器8和控制器10 当在速度控制变量的输出定时中产生偏差时，线圈电动机6。

公开(公告)号：JPH11264072A

公开(公告)日：1999-09-28

申请号：JP5362398

申请日：1998-03-05

Applicant: IBM

Inventor： TAKEUCHI MASAYUKI ,  NAKAGAWA SHINYA

IPC: H01L21/205 ,  C23C16/44 ,  C23C16/458 ,  C23C16/46 ,  C23C16/52 ,  G01B11/06

Abstract: PROBLEM TO BE SOLVED: To provide a film deposition device correctly measuring the change in film thickness by laser beam in-situ in the process of a film forming process of a wafer by a CVD method without being influenced by a deposited film at the inside of a quartz furnace. SOLUTION: The cap part 28 of a quartz furnace 1 in a CVD device is provided with a light guide, a laser beam 50 is introduced into the quartz furnace through the light guide, and a wafer is irradiated with the laser beam. Reflected laser beam from the wafer is taken out to the outside of the quartz furnace through the same light guide, and the change of the film thickness is measured based on the quantity of the reflected laser beam. In this way, the laser beam can be transmitted without passing through the wall of the quartz furnace, and the measurement of film thickness can correctly be executed without being influenced by deposits on the wall face of the quartz furnace.