公开(公告)号：DE69427441D1

公开(公告)日：2001-07-19

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：SG47386A1

公开(公告)日：1998-04-17

申请号：SG1996000407

申请日：1992-12-07

Applicant: IBM

Inventor： FRANCO LUIS PADILLA ,  KAUFMAN JAMES HARVEY ,  METIN SERHAT ,  PALMER DANNY DEAN ,  SAPERSTEIN DAVID DORN ,  WU ANTHONY WAI

IPC: G11B5/64 ,  G11B5/72 ,  G11B5/73

Abstract: A thin film metal alloy magnetic recording disk has a protective nitrogen-containing carbon overcoat which is thinner and which exhibits better wear resistance, corrosion resistance, and hardness than conventional carbon overcoats without nitrogen. The nitrogen present in the disk overcoat substantially reduces the film stress. Because of the low stress of the overcoat film there is significantly less likelihood that the overcoat will delaminate, buckle, or otherwise wear away from the underlying magnetic layer during operation of the disk file. This allows for significantly reduced overcoat thickness, thus reducing the head-disk spacing in the disk file. The overcoat, even though significantly thinner than prior art carbon overcoats, exhibits better wear and corrosion resistance than carbon overcoats without nitrogen. In addition, when the carbon overcoat contains hydrogen, the presence of the nitrogen increases the hardness of the film if present in a specific amount dependent on the amount of hydrogen present.

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：DE69227013T2

公开(公告)日：1999-06-02

申请号：DE69227013

申请日：1992-12-07

Applicant: IBM

Inventor： FRANCO LUIS PADILLA ,  KAUFMAN JAMES HARVEY ,  METIN SERHAT ,  PALMER DANNY DEAN ,  SAPERSTEIN DAVID DORN ,  WU ANTHONY WAI

IPC: G11B5/64 ,  G11B5/72 ,  G11B5/73

Abstract: A thin film metal alloy magnetic recording disk has a protective nitrogen-containing carbon overcoat which is thinner and which exhibits better wear resistance, corrosion resistance, and hardness than conventional carbon overcoats without nitrogen. The nitrogen present in the disk overcoat substantially reduces the film stress. Because of the low stress of the overcoat film there is significantly less likelihood that the overcoat will delaminate, buckle, or otherwise wear away from the underlying magnetic layer during operation of the disk file. This allows for significantly reduced overcoat thickness, thus reducing the head-disk spacing in the disk file. The overcoat, even though significantly thinner than prior art carbon overcoats, exhibits better wear and corrosion resistance than carbon overcoats without nitrogen. In addition, when the carbon overcoat contains hydrogen, the presence of the nitrogen increases the hardness of the film if present in a specific amount dependent on the amount of hydrogen present.

公开(公告)号：DE69227013D1

公开(公告)日：1998-10-22

申请号：DE69227013

申请日：1992-12-07

Applicant: IBM

Inventor： FRANCO LUIS PADILLA ,  KAUFMAN JAMES HARVEY ,  METIN SERHAT ,  PALMER DANNY DEAN ,  SAPERSTEIN DAVID DORN ,  WU ANTHONY WAI

IPC: G11B5/64 ,  G11B5/72 ,  G11B5/73

Abstract: A thin film metal alloy magnetic recording disk has a protective nitrogen-containing carbon overcoat which is thinner and which exhibits better wear resistance, corrosion resistance, and hardness than conventional carbon overcoats without nitrogen. The nitrogen present in the disk overcoat substantially reduces the film stress. Because of the low stress of the overcoat film there is significantly less likelihood that the overcoat will delaminate, buckle, or otherwise wear away from the underlying magnetic layer during operation of the disk file. This allows for significantly reduced overcoat thickness, thus reducing the head-disk spacing in the disk file. The overcoat, even though significantly thinner than prior art carbon overcoats, exhibits better wear and corrosion resistance than carbon overcoats without nitrogen. In addition, when the carbon overcoat contains hydrogen, the presence of the nitrogen increases the hardness of the film if present in a specific amount dependent on the amount of hydrogen present.

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.