公开(公告)号：BG99875A

公开(公告)日：1996-05-31

申请号：BG9987595

申请日：1995-08-18

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：HUT72801A

公开(公告)日：1996-05-28

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：CA2102087A1

公开(公告)日：1994-08-19

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 ,  G11B7/12

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：IN188811B

公开(公告)日：2002-11-09

申请号：IN103DE1994

申请日：1994-01-27

Applicant: IBM

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

IPC: G06K5/00

公开(公告)号：CZ290656B6

公开(公告)日：2002-09-11

申请号：CZ211595

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: In the present invention there is disclosed a contact magnetic recording disk file utilizing a magnetoresistive MR sensor (60) for reading data recorded on the disk (16). The disk file may be of the liquid-bearing type of contact recording with the MR sensor (60) supported on the trailing end of a carrier (20), 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 (60) by the disk (16), 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 (60) may be designed to operate at selected parameters to minimize the effect of the baseline modulation, and the portion of the carrier (20) in contact with the disk (16) surface may be selected to have a length less than the period of the disk (16) waviness so that it more closely follows the disk (16) surface topography.

公开(公告)号：CZ9502115A3

公开(公告)日：2002-05-15

申请号：CZ211595

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：DE69427441T2

公开(公告)日：2001-11-08

申请号：DE69427441

申请日：1994-07-05

Applicant: IBM

Inventor： BEST GEORGE LAWRENCE ,  DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  FRANCO LUIS PADILLA ,  KERTH RANDALL THOMAS

IPC: G11B5/60 ,  G11B21/21 ,  G11B17/32

Abstract: A data recording disk drive a low-flying air-bearing slider that is also able to be in contact and near contact with the lubricant film on the disk. The slider has a front air-bearing surface in the form of a pair of equally-spaced air-bearing pads 25, 27, a rear air-bearing pad 29, and a central nonair-bearing recessed surface 28 which separates the front and rear air-bearing pads. The two front pads have a surface area greater than that of the rear pad and thus provide a positive pitch up of the slider. This causes the rear pad to also be pitched up so that air can flow beneath the rear pad to generate an air bearing in the rear portion of the slider. The presence of the central nonair-bearing region eliminates any lift in the central part of the slider, which allows for the low-flying height. The flying height of the rear pad of the slider above the disk is controlled by the width of the rear air-bearing pad. The rear pad has its leading edge 31 wider than its trailing edge 33 so that it is able to withstand contact with the lubricant film on the disk, typically at the lower disk velocities near the disk inside diameter, without generating unacceptable drag forces or depleting the lubricant from the disk. The rear pad also has a skewed leading edge which compensates for skew of the slider to minimize the flying height variation from the disk inside diameter to outside diameter.

公开(公告)号：SG45210A1

公开(公告)日：1998-01-16

申请号：SG1996001310

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：SG44355A1

公开(公告)日：1997-12-19

申请号：SG1995002201

申请日：1994-07-05

Applicant: IBM

Inventor： BEST GEORGE LAWRENCE ,  DOVEK MORIS MUSA ,  FOSTER JOHN STUART ,  FRANCO LUIS PADILLA ,  KERTH RANDALL THOMAS

IPC: G11B5/60 ,  G11B21/21 ,  G11B17/32

Abstract: A data recording disk drive a low-flying air-bearing slider that is also able to be in contact and near contact with the lubricant film on the disk. The slider has a front air-bearing surface in the form of a pair of equally-spaced air-bearing pads 25, 27, a rear air-bearing pad 29, and a central nonair-bearing recessed surface 28 which separates the front and rear air-bearing pads. The two front pads have a surface area greater than that of the rear pad and thus provide a positive pitch up of the slider. This causes the rear pad to also be pitched up so that air can flow beneath the rear pad to generate an air bearing in the rear portion of the slider. The presence of the central nonair-bearing region eliminates any lift in the central part of the slider, which allows for the low-flying height. The flying height of the rear pad of the slider above the disk is controlled by the width of the rear air-bearing pad. The rear pad has its leading edge 31 wider than its trailing edge 33 so that it is able to withstand contact with the lubricant film on the disk, typically at the lower disk velocities near the disk inside diameter, without generating unacceptable drag forces or depleting the lubricant from the disk. The rear pad also has a skewed leading edge which compensates for skew of the slider to minimize the flying height variation from the disk inside diameter to outside diameter.

公开(公告)号：PL172763B1

公开(公告)日：1997-11-28

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.