公开(公告)号：JPH06259739A

公开(公告)日：1994-09-16

申请号：JP1612494

申请日：1994-02-10

Applicant: IBM

Inventor： DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  LAM DONALD K F ,  SAWATZKY ERICH

IPC: G11B5/02 ,  G11B5/00 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10 ,  G11B19/04

Abstract: PURPOSE: To improve the file performance by supporting a magnetoresistive sensor on the rear end of a carrier put on a liquid bearing at the time of bring ing a magnetic recording transducer into contact with a magnetic recording disk during the read or write operation to make a disk file or a disk drive. CONSTITUTION: A transducer carrier 20 consists of a liquid bearing 50 provided on a disk 16 and a magnetic read/induction write head 42 provided on a rear end 44. A magnetic read sensor 60 and an induction write head 62 are formed as thin film layers on the rear end of the carrier 20, and an end part 61 of the sensor 60 is placed between shields 62 and 63 arranged apart from each other. An induction write head 70 constituting the head 42 consists of a coil 73 and a recording gap 75 and is oriented to the surface of the disk 16. The part 61 of the sensor 60 is brought into contact with a liquid bearing 50 provided on the disk 16, and head design is made free so as to be suitable for write because it is unnecessary for the head 70 to read data recorded on the magnetic layer of the disk 16.

公开(公告)号：JP2788600B2

公开(公告)日：1998-08-20

申请号：JP1612494

申请日：1994-02-10

Applicant: IBM

Inventor： DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  LAM DONALD K F ,  SAWATZKY ERICH

IPC: G11B5/02 ,  G11B5/00 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10 ,  G11B19/04

公开(公告)号：CA2102087C

公开(公告)日：1998-11-24

申请号：CA2102087

申请日：1993-10-29

Applicant: IBM

Inventor： DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  LAM DONALD K F ,  SAWATZKY ERICH

IPC: G11B5/02 ,  G11B5/00 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10

Abstract: A contact magnetic recording rigid disk file utilizes a magnetoresistive (MR) sensor for reading data recorded on the disk. The disk file may be of the liquid-bearing type of contact recording with the MR sensor supported on the trailing end of a carrier which rides on the liquid bearing. The performance of the disk file is enhanced by including means for minimizing the effect of a discovered baseline read signal modulation. The modulation has been determined to be caused by variable cooling of the temperature-sensitive and temperature-elevated MR sensor by the disk, with the temperature variation being directly related to the variation in head-disk spacing caused by the waviness of the surface of the disk. A filter may be incorporated into the read signal processing circuitry of the disk file to eliminate the modulation, the MR sensor may be designed to operate at selected parameters to minimize the effect of the baseline modulation, and the portion of the carrier in contact with the disk surface may be selected to have a length less than the period of the disk waviness so that it more closely follows the disk surface topography.

公开(公告)号：PH31345A

公开(公告)日：1998-07-17

申请号：PH47761

申请日：1994-02-14

Applicant: IBM

Inventor： MUSA DOVER MORIS ,  STUART FOSTER JOHN ,  LAM DONALD K F ,  ERICH SAWATSKY

IPC: G11B5/00 ,  G11B5/02 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10

Abstract: A contact magnetic recording rigid disk file utilizes a magnetoresistive (MR) sensor for reading data recorded on the disk. The disk file may be of the liquid-bearing type of contact recording with the MR sensor supported on the trailing end of a carrier which rides on the liquid bearing. The performance of the disk file is enhanced by including means for minimizing the effect of a discovered baseline read signal modulation. The modulation has been determined to be caused by variable cooling of the temperature-sensitive and temperature-elevated MR sensor by the disk, with the temperature variation being directly related to the variation in head-disk spacing caused by the waviness of the surface of the disk. A filter may be incorporated into the read signal processing circuitry of the disk file to eliminate the modulation, the MR sensor may be designed to operate at selected parameters to minimize the effect of the baseline modulation, and the portion of the carrier in contact with the disk surface may be selected to have a length less than the period of the disk waviness so that it more closely follows the disk surface topography.

公开(公告)号：ES2157973T3

公开(公告)日：2001-09-01

申请号：ES94901867

申请日：1993-11-24

Applicant: IBM

Inventor： DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  LAM DONALD K F ,  SAWATZKY ERICH

IPC: G11B5/00 ,  G11B5/02 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10

Abstract: A contact magnetic recording rigid disk file utilizes a magnetoresistive (MR) sensor for reading data recorded on the disk. The disk file may be of the liquid-bearing type of contact recording with the MR sensor supported on the trailing end of a carrier which rides on the liquid bearing. The performance of the disk file is enhanced by including means for minimizing the effect of a discovered baseline read signal modulation. The modulation has been determined to be caused by variable cooling of the temperature-sensitive and temperature-elevated MR sensor by the disk, with the temperature variation being directly related to the variation in head-disk spacing caused by the waviness of the surface of the disk. A filter may be incorporated into the read signal processing circuitry of the disk file to eliminate the modulation, the MR sensor may be designed to operate at selected parameters to minimize the effect of the baseline modulation, and the portion of the carrier in contact with the disk surface may be selected to have a length less than the period of the disk waviness so that it more closely follows the disk surface topography.

公开(公告)号：PL310176A1

公开(公告)日：1995-11-27

申请号：PL31017693

申请日：1993-11-24

Applicant: IBM

Inventor： DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  LAM DONALD K F ,  SAWATZKY ERICH

IPC: G11B5/00 ,  G11B5/02 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10

Abstract: A contact magnetic recording rigid disk file utilizes a magnetoresistive (MR) sensor for reading data recorded on the disk. The disk file may be of the liquid-bearing type of contact recording with the MR sensor supported on the trailing end of a carrier which rides on the liquid bearing. The performance of the disk file is enhanced by including means for minimizing the effect of a discovered baseline read signal modulation. The modulation has been determined to be caused by variable cooling of the temperature-sensitive and temperature-elevated MR sensor by the disk, with the temperature variation being directly related to the variation in head-disk spacing caused by the waviness of the surface of the disk. A filter may be incorporated into the read signal processing circuitry of the disk file to eliminate the modulation, the MR sensor may be designed to operate at selected parameters to minimize the effect of the baseline modulation, and the portion of the carrier in contact with the disk surface may be selected to have a length less than the period of the disk waviness so that it more closely follows the disk surface topography.

公开(公告)号：BR9400133A

公开(公告)日：1994-10-04

申请号：BR9400133

申请日：1994-01-19

Applicant: IBM

Inventor： DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  LAM DONALD K F ,  SAWATZKY ERICH

IPC: G11B5/02 ,  G11B5/00 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10 ,  G11B21/21

Abstract: A contact magnetic recording rigid disk file utilizes a magnetoresistive (MR) sensor for reading data recorded on the disk. The disk file may be of the liquid-bearing type of contact recording with the MR sensor supported on the trailing end of a carrier which rides on the liquid bearing. The performance of the disk file is enhanced by including means for minimizing the effect of a discovered baseline read signal modulation. The modulation has been determined to be caused by variable cooling of the temperature-sensitive and temperature-elevated MR sensor by the disk, with the temperature variation being directly related to the variation in head-disk spacing caused by the waviness of the surface of the disk. A filter may be incorporated into the read signal processing circuitry of the disk file to eliminate the modulation, the MR sensor may be designed to operate at selected parameters to minimize the effect of the baseline modulation, and the portion of the carrier in contact with the disk surface may be selected to have a length less than the period of the disk waviness so that it more closely follows the disk surface topography.

公开(公告)号：AT201524T

公开(公告)日：2001-06-15

申请号：AT94901867

申请日：1993-11-24

Applicant: IBM

Inventor： DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  LAM DONALD K F ,  SAWATZKY ERICH

IPC: G11B5/02 ,  G11B5/00 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10

Abstract: A contact magnetic recording rigid disk file utilizes a magnetoresistive (MR) sensor for reading data recorded on the disk. The disk file may be of the liquid-bearing type of contact recording with the MR sensor supported on the trailing end of a carrier which rides on the liquid bearing. The performance of the disk file is enhanced by including means for minimizing the effect of a discovered baseline read signal modulation. The modulation has been determined to be caused by variable cooling of the temperature-sensitive and temperature-elevated MR sensor by the disk, with the temperature variation being directly related to the variation in head-disk spacing caused by the waviness of the surface of the disk. A filter may be incorporated into the read signal processing circuitry of the disk file to eliminate the modulation, the MR sensor may be designed to operate at selected parameters to minimize the effect of the baseline modulation, and the portion of the carrier in contact with the disk surface may be selected to have a length less than the period of the disk waviness so that it more closely follows the disk surface topography.

公开(公告)号：HU216673B

公开(公告)日：1999-08-30

申请号：HU9502416

申请日：1993-11-24

Applicant: IBM

Inventor： DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  LAM DONALD K F ,  SAWATZKY ERICH

IPC: G11B5/00 ,  G11B5/02 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10

Abstract: A contact magnetic recording rigid disk file utilizes a magnetoresistive (MR) sensor for reading data recorded on the disk. The disk file may be of the liquid-bearing type of contact recording with the MR sensor supported on the trailing end of a carrier which rides on the liquid bearing. The performance of the disk file is enhanced by including means for minimizing the effect of a discovered baseline read signal modulation. The modulation has been determined to be caused by variable cooling of the temperature-sensitive and temperature-elevated MR sensor by the disk, with the temperature variation being directly related to the variation in head-disk spacing caused by the waviness of the surface of the disk. A filter may be incorporated into the read signal processing circuitry of the disk file to eliminate the modulation, the MR sensor may be designed to operate at selected parameters to minimize the effect of the baseline modulation, and the portion of the carrier in contact with the disk surface may be selected to have a length less than the period of the disk waviness so that it more closely follows the disk surface topography.

公开(公告)号：RU2113019C1

公开(公告)日：1998-06-10

申请号：RU95118287

申请日：1993-11-24

Applicant: IBM

Inventor： DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  LAM DONALD K F ,  SAWATZKY ERICH

IPC: G11B5/00 ,  G11B5/02 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/58 ,  G11B5/60 ,  G11B20/10

Abstract: FIELD: information storage equipment using hard drives with magnetoresistive reader. SUBSTANCE: device has hard drive for magnetic recording, hard drive rotation unit, magnetoresistive head, which is mounted on holder, unit which provides contact of holder to disk, unit for processing signal which is read by magnetoresistive head, holder movement drive. Disk is covered with liquid film. Holder has unit for keeping holder on liquid substrate. Disk drive has unit for decreasing effect of signal modulation caused by alternation of magnetoresistive detector cooling caused by difference in distance between disk and head due to buckles on disk surface. Goal of invention is achieved by filter which is introduced into signal for processing of signal to be read. Parameters of detector decrease modulation effect. Length of holder which contacts disk is less than disk buckles period. EFFECT: decreased signal modulation caused by disk buckles. 16 cl, 14 dwg