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公开(公告)号：AU650403B2
公开(公告)日：1994-06-16
申请号：AU1725792
申请日：1992-05-28
Applicant: IBM
Inventor： ALBRECHT THOMAS R , FOSTER JOHN STUART , HOMOLA ANDREW MARIAN
Abstract: Described is a transducer assembly for use in a disk file which provides substantially reduced head-disk spacing and a corresponding improvement in recording performance. The assembly includes a transducer carrier with feet which ski on a high viscosity liquid film with which the disk is coated. Also described is a disk file incorporating such a transducer assembly.
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公开(公告)号：DE3261588D1
公开(公告)日：1985-01-31
申请号：DE3261588
申请日：1982-03-25
Applicant: IBM
Inventor： BRUCE CALVIN ARNOLD , HOMOLA ANDREW MARIAN , LORENZ MAX RUDOLPH
Abstract: A monolayer magnetic coating is prepared by applying magnetic particles which have an electrostatic charge in an aqueous environment to an active layer on a substrate, the active layer having an electrostatic charge in an aqueous environment opposite to the charge on the magnetic particles so that the particles bond to the active layer.A method of applying a magnetic coating to a disc substrate is disclosed comprising coating the substrate with an active coating material having an electrostatic charge in an aqueous environment to form an active layer, applying to the active coating material magnetic particles coated with colloidal silica, said silica-coated magnetic particles having an electrostatic charge thereon in an aqueous environment opposite to the charge on said active coating material, whereby the magnetic particles are electrostatically attracted to and bonded to said active material to form a magnetic layer, and applying a magnetic field to said magnetic particles to magnetically align said particles.
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公开(公告)号：AT159606T
公开(公告)日：1997-11-15
申请号：AT93303064
申请日：1993-04-20
Applicant: IBM
Inventor： ALBRECHT THOMAS ROBERT , DOVEK MORIS MUSA , FOSTER JOHN STUART , HOMOLA ANDREW MARIAN , O'SULLIVAN TIMOTHY CHRISTOPHER
Abstract: A data recording disk file of the liquid-bearing type has an improved head-disk interface provided in by a transducer carrier (100) with new properties. The carrier (100) supports a conventional head (109) for reading and writing data to the disk (130). The carrier has an air-bearing surface (110,112) near its front end, a ski pad (118) near its rear end, and a plurality of ski feet or struts (120,122) which support the air-bearing surface off the liquid film (146) of the disk when the disk file is not operating. The air-bearing surface is in the form of a pair of air-bearing rails (110,112) located outboard of the rear ski pad so that no air-bearing effect occurs in the rearward region of the carrier to assure the skiing action of the rear ski pad. As operational speed is approached the air-bearing lifts the struts off the disk and the rear ski pad is the sole ski foot on the liquid film. The rear ski pad has a convexly shaped leading edge which is wider than its trailing edge to minimize static friction and lubricant thinning during skiing, and the angle between the leading and trailing edges of the pad is selected to enable the pad to ski over the wide ranges of carrier-disk velocity which occur as the carrier moves from disk ID to OD.
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公开(公告)号：NZ242886A
公开(公告)日：1995-08-28
申请号：NZ24288692
申请日：1992-05-25
Applicant: IBM
Inventor： ALBRECHT THOMAS R , FOSTER JOHN STUART , HOMOLA ANDREW MARIAN
Abstract: A disk file is described with substantially reduced head-disk spacing and corresponding improvement in recording performance which uses a disk coated with a film of conventional high viscosity lubricant, a lubricant reservoir for replenishing the lubricant on the disk over the life of the file, and a transducer carrier with feet which ski on the high viscosity liquid film. The file does not include any means for recirculating the lubricant since the lubricant spins off the disk at a relatively low rate due to its high viscosity. The lubricant reservoir contains a very small amount of lubricant and thus may be maintained inside the substantially sealed disk file. In one embodiment of the invention, the sealed disk file is essentially evacuated. The operation of the disk file in a near vacuum environment is possible because, unlike conventional disk files, air is not required to support an air-bearing head-disk interface and the high vapor pressure of the relatively high molecular weight lubricant prevents its evaporation.
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公开(公告)号：SG44391A1
公开(公告)日：1997-12-19
申请号：SG1996000088
申请日：1992-06-11
Applicant: IBM
Inventor： ALBRECHT THOMAS R , FOSTER JOHN STUART , HOMOLA ANDREW MARIAN
Abstract: Described is a transducer assembly for use in a disk file which provides substantially reduced head-disk spacing and a corresponding improvement in recording performance. The assembly includes a transducer carrier with feet which ski on a high viscosity liquid film with which the disk is coated. Also described is a disk file incorporating such a transducer assembly.
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Patent Agency Ranking
公开(公告)号：DE69219224T2
公开(公告)日：1997-10-16
申请号：DE69219224
申请日：1992-06-11
Applicant: IBM
Inventor： ALBRECHT THOMAS R , FOSTER JOHN STUART , HOMOLA ANDREW MARIAN
Abstract: Described is a transducer assembly for use in a disk file which provides substantially reduced head-disk spacing and a corresponding improvement in recording performance. The assembly includes a transducer carrier with feet which ski on a high viscosity liquid film with which the disk is coated. Also described is a disk file incorporating such a transducer assembly.
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公开(公告)号：DE3367295D1
公开(公告)日：1986-12-04
申请号：DE3367295
申请日：1983-06-29
Applicant: IBM
Inventor： HOMOLA ANDREW MARIAN , LORENZ MAX RUDOLPH , SUSSNER HEINRICH
Abstract: A monolayer magnetic coating is prepared by applying magnetic particles which have an electrostatic charge in an aqueous environment to an active layer on a substrate, the active layer having an electrostatic charge in an aqueous environment opposite to the charge on the magnetic particles so that the particles bond to the active layer. The magnetic particles are dispersed in an electrolyte (eg Na Cl) and the concentration of the electrolyte is adjusted to reduce the coulombic repulsive forces between the particles, permitting them to move closer together and thereby increasing the magnetic particle packing density in the resultant magnetic coating.
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公开(公告)号：SG64291A1
公开(公告)日：1999-04-27
申请号：SG1996000090
申请日：1993-04-20
Applicant: IBM
Inventor： ALBRECHT THOMAS ROBERT , DOVEK MORIS MUSA , FOSTER JOHN STUART , HOMOLA ANDREW MARIAN , O'SULLIVAN TIMOTHY CHRISTOPHER
Abstract: A data recording disk file of the liquid-bearing type has an improved head-disk interface provided in by a transducer carrier (100) with new properties. The carrier (100) supports a conventional head (109) for reading and writing data to the disk (130). The carrier has an air-bearing surface (110,112) near its front end, a ski pad (118) near its rear end, and a plurality of ski feet or struts (120,122) which support the air-bearing surface off the liquid film (146) of the disk when the disk file is not operating. The air-bearing surface is in the form of a pair of air-bearing rails (110,112) located outboard of the rear ski pad so that no air-bearing effect occurs in the rearward region of the carrier to assure the skiing action of the rear ski pad. As operational speed is approached the air-bearing lifts the struts off the disk and the rear ski pad is the sole ski foot on the liquid film. The rear ski pad has a convexly shaped leading edge which is wider than its trailing edge to minimize static friction and lubricant thinning during skiing, and the angle between the leading and trailing edges of the pad is selected to enable the pad to ski over the wide ranges of carrier-disk velocity which occur as the carrier moves from disk ID to OD.
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公开(公告)号：SG44389A1
公开(公告)日：1997-12-19
申请号：SG1996000084
申请日：1992-06-11
Applicant: IBM
Inventor： ALBRECHT THOMAS R , FOSTER JOHN STUART , HOMOLA ANDREW MARIAN
Abstract: A disk file is described with substantially reduced head-disk spacing and corresponding improvement in recording performance which uses a disk coated with a film of conventional high viscosity lubricant, a lubricant reservoir for replenishing the lubricant on the disk over the life of the file, and a transducer carrier with feet which ski on the high viscosity liquid film. The file does not include any means for recirculating the lubricant since the lubricant spins off the disk at a relatively low rate due to its high viscosity. The lubricant reservoir contains a very small amount of lubricant and thus may be maintained inside the substantially sealed disk file. In one embodiment of the invention, the sealed disk file is essentially evacuated. The operation of the disk file in a near vacuum environment is possible because, unlike conventional disk files, air is not required to support an air-bearing head-disk interface and the high vapor pressure of the relatively high molecular weight lubricant prevents its evaporation.
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公开(公告)号：AU646374B2
公开(公告)日：1994-02-17
申请号：AU1725892
申请日：1992-05-28
Applicant: IBM
Inventor： ALBRECHT THOMAS R , FOSTER JOHN STUART , HOMOLA ANDREW MARIAN
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