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公开(公告)号：DE68912610T2
公开(公告)日：1994-06-23
申请号：DE68912610
申请日：1989-02-02
Applicant: IBM
Inventor： WILLIAMS MASON LAMAR , COUFAL HANS JUERGEN
Abstract: A magnetic head assembly for supporting a magnetic head a small uniform spacing above the surface of a magnetic recording medium comprising a slider body having a layer of superconducting material on the surface of the slider body which faces the surface of the magnetic recording medium. The magnetic head assembly is maintained in a vacuum of a predetermined level or in a gas, and the superconducting layer is cooled to a temperature below its critical temperature so that the magnetic head assembly and is levitated to a small uniform spacing above the surface of the magnetic recording medium due to magnetic forces between the magnetized magnetic recording medium and the layer of superconducting material.
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公开(公告)号：DE68912610D1
公开(公告)日：1994-03-10
申请号：DE68912610
申请日：1989-02-02
Applicant: IBM
Inventor： WILLIAMS MASON LAMAR , COUFAL HANS JUERGEN
Abstract: A magnetic head assembly for supporting a magnetic head a small uniform spacing above the surface of a magnetic recording medium comprising a slider body having a layer of superconducting material on the surface of the slider body which faces the surface of the magnetic recording medium. The magnetic head assembly is maintained in a vacuum of a predetermined level or in a gas, and the superconducting layer is cooled to a temperature below its critical temperature so that the magnetic head assembly and is levitated to a small uniform spacing above the surface of the magnetic recording medium due to magnetic forces between the magnetized magnetic recording medium and the layer of superconducting material.
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公开(公告)号：DE3573858D1
公开(公告)日：1989-11-23
申请号：DE3573858
申请日：1985-05-10
Applicant: IBM
Inventor： BARTON ROGER WESTWOOD , COUFAL HANS JUERGEN , JIPSON VICTOR BURR , LEE WEN YAUNG
IPC: B41M5/26 , G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/243 , G11B7/257 , G11B9/00 , G11B11/00 , G11C13/04 , G11B7/24
Abstract: A method of and structure for optical recording by energy-induced homogenization or fractionation is disclosed. When the,method involves fractionation, a film is provided that contains a homogeneous mixture of a matrix material and an incident energy absorbing material. A spot on the film is treated with sufficient energy in the form of electric fields, radiation or heat, or combinations thereof to effect fractionation and/or homogenization of the film which will undergo further physical state transition only under treatment with additional energy. In a preferred embodiment, the fractionation is effected by laser radiation. The laser irradiated spot becomes inhomogeneous and can be detected by the resulting changes in its optical properties. When the method involves homogenization, a film is provided that contains a inhomogenous mixture. The energy treated spot in this case becomes homogeneous without undergoing a phase transition between the amorphous and crystalline phases. Numerous combinations of fractionation and homogenization can result in the writing and erasing of information in a storage device.
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公开(公告)号：BR8900395A
公开(公告)日：1989-09-26
申请号：BR8900395
申请日：1989-01-31
Applicant: IBM
Inventor： WILLIAMS MASON L III , COUFAL HANS JUERGEN
Abstract: A magnetic head assembly for supporting a magnetic head a small uniform spacing above the surface of a magnetic recording medium comprising a slider body having a layer of superconducting material on the surface of the slider body which faces the surface of the magnetic recording medium. The magnetic head assembly is maintained in a vacuum of a predetermined level or in a gas, and the superconducting layer is cooled to a temperature below its critical temperature so that the magnetic head assembly and is levitated to a small uniform spacing above the surface of the magnetic recording medium due to magnetic forces between the magnetized magnetic recording medium and the layer of superconducting material.
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