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Patent Agency Ranking
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公开(公告)号：AU5295179A
公开(公告)日：1980-06-26
申请号：AU5295179
申请日：1979-11-19
Applicant: IBM
Inventor： JONES ROBERT EDWARD JR , NYSTROM WALTHER
Abstract: A thin film magnetic transducer for reading and writing a track on a magnetic recording medium consists of layers deposited on a deposition surface of a non-magnetic substrate (20) which has an air bearing surface (ABS) at right angles to the deposition surface. Two of the layers (14, 15) are of magnetic material to form a yoke (13) with a pole tip region having a transducing gap (18) at the air bearing surface(ABS), and with a back region. A read/write coil (10a to 10h) is coupled to the back region. The pole tip region has a width approximating to track width and a length (D) of approximately 5/d where d is the recording density on the recording medium in order to minimise signals from adjacent tracks and maximise read resolution. The thickness and width of the layers (14, 15) in the back region are greater than those dimensions in the pole tip region, the increase in width being provided by a taper. The width of the back region is greater than the width of the pole tip region, the wider back region tapering to join the pole tip region. Also the thickness of the back region magnetic layers (14,15) is at least 60% greater than the thickness of the pole tip region. The back region is designed taking into account saturation to provide an efficient write operation.
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公开(公告)号：AU526069B2
公开(公告)日：1982-12-16
申请号：AU5295179
申请日：1979-11-19
Applicant: IBM
Inventor： JONES ROBERT EDWARD JR , NYSTROM WALTHER
Abstract: A thin film magnetic transducer for reading and writing a track on a magnetic recording medium consists of layers deposited on a deposition surface of a non-magnetic substrate (20) which has an air bearing surface (ABS) at right angles to the deposition surface. Two of the layers (14, 15) are of magnetic material to form a yoke (13) with a pole tip region having a transducing gap (18) at the air bearing surface(ABS), and with a back region. A read/write coil (10a to 10h) is coupled to the back region. The pole tip region has a width approximating to track width and a length (D) of approximately 5/d where d is the recording density on the recording medium in order to minimise signals from adjacent tracks and maximise read resolution. The thickness and width of the layers (14, 15) in the back region are greater than those dimensions in the pole tip region, the increase in width being provided by a taper. The width of the back region is greater than the width of the pole tip region, the wider back region tapering to join the pole tip region. Also the thickness of the back region magnetic layers (14,15) is at least 60% greater than the thickness of the pole tip region. The back region is designed taking into account saturation to provide an efficient write operation.
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公开(公告)号：CA1127298A
公开(公告)日：1982-07-06
申请号：CA339634
申请日：1979-11-13
Applicant: IBM
Inventor： JONES ROBERT E JR , NYSTROM WALTHER
Abstract: THIN FILM INDUCTIVE TRANSDUCER This thin film inductive transducer comprises a yoke structure consisting of a pole tip region which joins a back region. To maximize resolution during reading of magnetic transitions from a moving magnetic recording medium, the pole tip region is of preselected constant relatively narrow width, and composed of magnetic layers having edges which extend in a direction normal to the medium for a distance D from an air bearing surface ABS to the back region and having a small thickness at least adjacent the ABS. To minimize the effects of spurious signals from adjacent tracks on the medium, distance D is at least 5/d, where d is the recording density on the medium; however, to maximize transducer efficiency, distance n is not increased significantly above 5/d. To oppose saturation of the yoke structure with applied current and enhance the efficiency of the transducer during recording, the cross-sectional area of the yoke structure is increased in the back region by progressively increasing its width rearward of the pole tip region and concurrently increasing the thickness of said magnetic layers at least about 60%. SA978036
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公开(公告)号：DE2961724D1
公开(公告)日：1982-02-18
申请号：DE2961724
申请日：1979-12-10
Applicant: IBM
Inventor： JONES JR ROBERT EDWARD , NYSTROM WALTHER
Abstract: A thin film magnetic transducer for reading and writing a track on a magnetic recording medium consists of layers deposited on a deposition surface of a non-magnetic substrate (20) which has an air bearing surface (ABS) at right angles to the deposition surface. Two of the layers (14, 15) are of magnetic material to form a yoke (13) with a pole tip region having a transducing gap (18) at the air bearing surface(ABS), and with a back region. A read/write coil (10a to 10h) is coupled to the back region. The pole tip region has a width approximating to track width and a length (D) of approximately 5/d where d is the recording density on the recording medium in order to minimise signals from adjacent tracks and maximise read resolution. The thickness and width of the layers (14, 15) in the back region are greater than those dimensions in the pole tip region, the increase in width being provided by a taper. The width of the back region is greater than the width of the pole tip region, the wider back region tapering to join the pole tip region. Also the thickness of the back region magnetic layers (14,15) is at least 60% greater than the thickness of the pole tip region. The back region is designed taking into account saturation to provide an efficient write operation.
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