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公开(公告)号:US4914868A
公开(公告)日:1990-04-10
申请号:US250685
申请日:1988-09-28
申请人: Mark A. Church , Annayya P. Deshpande , Alain M. Desouches , George S. Pal , Michael P. Salo , Muhammad I. Ullah
发明人: Mark A. Church , Annayya P. Deshpande , Alain M. Desouches , George S. Pal , Michael P. Salo , Muhammad I. Ullah
CPC分类号: G11B5/3903 , B23Q17/22 , Y10T29/49036 , Y10T29/49048
摘要: A lapping control system for a row of thin film magnetic transducers formed on a substrate. Each of the magnetic transducers comprises a magnetoresistive (MR) element, and the row is supported on a holder which has an elongated H-shaped slot near one edge to form a beam member upon which the row is mounted. The beam member is capable of being deflected in a substantially quadratic curvature when subjected to pressure from a pressure transducer at the middle of the beam member. The resistance of each of the MR elements is measured during lapping, and a control signal is generated to control the pressure transducers to control lapping with proper BALANCE and BOW and to terminate lapping when the desired MR element height is reached.
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公开(公告)号:US4912883A
公开(公告)日:1990-04-03
申请号:US310410
申请日:1989-02-13
申请人: Mike Y. Chang , Mark A. Church , Michael P. Salo
发明人: Mike Y. Chang , Mark A. Church , Michael P. Salo
IPC分类号: B24B37/013 , B24B37/04 , G11B5/31 , G11B5/455
CPC分类号: B24B37/013 , B24B37/048 , G11B5/3116 , G11B5/3166 , G11B5/455
摘要: A lapping control system for a row of thin film magnetic transducers formed on a substrate. Each of the rows comprises a plurality of thin film magnetic transducers and at least two test structures. Each test structure has at least two elements which comprises some combination of switch elements or test thin film magnetic transducers. As the row of transducers is lapped, each time one of the switch elements is opened, the saturation current (ISAT) of one or more of the thin film magnetic transducers is measured and recorded so that a correlation between ISAT and throat height of the transducers is established during lapping. This correlation is used to establish the point at which lapping should be terminated.
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公开(公告)号:US07133254B2
公开(公告)日:2006-11-07
申请号:US10452553
申请日:2003-05-30
CPC分类号: G11B5/3136 , G11B5/10 , G11B5/105 , G11B5/127 , G11B5/3103 , G11B5/3967 , G11B5/54 , G11B5/58 , G11B5/6064 , G11B2005/001 , G11B2005/0021
摘要: A magnetic recording disk drive has a magnetic recording head that includes first and second separating layers, and a heater formed between the first and second separating layers. The heater has a dimension such a thermal protrusion is induced in the recording head and a thermal conductance between the recording head and a recording medium is enhanced.
摘要翻译: 磁记录盘驱动器具有包括第一和第二分离层的磁记录头和形成在第一和第二分离层之间的加热器。 加热器具有在记录头中感应出这样的热突起的尺寸,并且增强了记录头和记录介质之间的热传导。
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