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1.发明授权
公开(公告)号：US3881190A
公开(公告)日：1975-04-29
申请号：US39921873
申请日：1973-09-20
Applicant: IBM
Inventor： BROCK GEORGE W , SHELLEDY FRANK B , SMITH SIDNEY H , WILLS ARTHUR B
Abstract: A magnetoresistive (MR) head with an unusually desirable spatial resolution includes a shield on each side of the MR element. Information is carried on a magnetizable medium as recorded magnetic areas. The shields are spaced apart by a distance on the order of and less than the shortest recorded wavelength for which the head is meant to be used. The MR element and the shields have their edges nearest the medium in a common plane perpendicular to the vertical component of a signal from the recorded area. An additional shunt bias layer may be provided immediately adjacent and coextensive the MR element, and the head may serve one or many tracks.
Abstract translation: 具有异常期望的空间分辨率的磁阻（MR）头包括在MR元件的每一侧上的屏蔽。 信息在可磁化介质上作为记录磁区进行。 屏蔽物隔开一定距离并且小于头部意图使用的最短记录波长的距离。 MR元件和屏蔽件在垂直于来自记录区域的信号的垂直分量的公共平面中具有最靠近介质的边缘。 附加的分流偏置层可以紧邻MR元件并且共同延伸，并且头可以用于一个或多个轨道。
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Patent Agency Ranking
公开(公告)号：CA1030652A
公开(公告)日：1978-05-02
申请号：CA182966
申请日：1973-10-09
Applicant: IBM
Inventor： O'DAY RICHARD L , SHELLEDY FRANK B
Abstract: A magnetic transducer exhibiting the magnetoresistive (MR) effect includes at least two thin film layers. A three-legged MR film in electrical contact with a higher resistivity layer is magnetically biased by a portion of the MR sense current shunted through the nonmagnetic layer. The need for an accurate and stable bias to reduce distortion is eliminated by subjecting similar adjacent MR elements to opposite currents. Each element is then symmetrically and oppositely biased so that a differential resistance sensing circuit provides an output signal relatively immune to distortion.
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公开(公告)号：CA1038493A
公开(公告)日：1978-09-12
申请号：CA206207
申请日：1974-08-02
Applicant: IBM
Inventor： BROCK GEORGE W , SHELLEDY FRANK B , SMITH SIDNEY H , WILLS ARTHUR B
Abstract: A magnetoresistive (HR) head with an unusually desirable spatial resolution includes a shield on each side of the MR element. Information is carried on a magnetizable medium as recorded magnetic areas. The shields and spaced apart by a distance on the order of and less than the shortest recorded wavelength for which the head is meant to be used. The HR element and the shields have their edges nearest the medium in a common plane perpendicular to the vertical component of a signal from the recorded area. An additional shunt bias layer may be provided immediately adjacent and coextensive the MR element, and the head may serve one or many tracks.
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公开(公告)号：CA1111553A
公开(公告)日：1981-10-27
申请号：CA292764
申请日：1977-12-09
Applicant: IBM
Inventor： MARINO PETER T , SHELLEDY FRANK B , SMATHERS EDMOND W
Abstract: MINOR BIT REDUCTION ON A MAGNETIC HEAD A magnetic head assembly for cooperating with a relatively moving medium, on which servo information and data information is recorded, and for reading and/or writing on said medium and for erasing said medium is fabricated so that the effect of pickup interference or unwanted signals during playback is reduced. The magnetic head assembly incorporates a geometry which shifts the signal envelope of the interfering signal so that it is in phase with the signal envelope of the desired signal. The preferred geometry is to dimension the head core so that the distance between two gaps or between a single gap and the edge of the core is equal to the distance between the servo tracks on said media. Additionally, the gap of the head has a gap null occurring at the frequency of the interfering signal.
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公开(公告)号：FR2386097A1
公开(公告)日：1978-10-27
申请号：FR7804187
申请日：1978-02-08
Applicant: IBM
Inventor： MARINO PETER T , SHELLEDY FRANK B , SWATHERS EDMOND W
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公开(公告)号：CA1030653A
公开(公告)日：1978-05-02
申请号：CA182967
申请日：1973-10-09
Applicant: IBM
Inventor： BROCK GEORGE W , SHELLEDY FRANK B
Abstract: A magnetic transducer exhibiting the magnetoresistive (MR) effect includes at least two thin film layers. An MR film in electrical control with a higher resistivity layer is magnetically biased by a portion of the MR sense current shunted through the nonmagnetic layer.
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