公开(公告)号：EP0638893A2

公开(公告)日：1995-02-15

申请号：EP94112441.4

申请日：1994-08-09

申请人： READ-RITE CORPORATION

发明人： Nepela, Daniel A. ,  Valstyn, Erich P. ,  Kroes, Derek Jan

IPC分类号： G11B5/33 ,  G11B5/37 ,  G11B5/39

CPC分类号： G11B5/3967 ,  G11B5/2452 ,  G11B5/313 ,  G11B5/332 ,  G11B5/374

摘要： A thin film read-write magnetic head useful in a tape apparatus includes a magnetic circuit consisting of two thin film magnetic layers (P1, P2) which form a magnetic yoke that is divided into three closely spaced sections (22, 24, 26), the central section (24) of at least one of the magnetic layers (P1, P2) containing an interspace in which a flux sensing element (199), such as a magnetoresistive device or Hall effect device, is located. The three section yoke forms a continuous magnetic circuit, except for the transducing gap (G), which circuit consists of three sections corresponding to the three sections (22, 24, 26) of the yoke. The total gap width determines the width (Ww) of the data track (30) being recorded. During the write mode, a magnetic valve (18) including an electronical conductor provides a shunt path to bypass the flux sensing means (19) so that all three sections (22, 24, 26) of the head operate for recording. During the read mode, only the central yoke section (24) and its transducing gap (G) portion sense the data signal recorded on the magnetic tape, and the read element detects the sensed signal. A saturation current is directed to the valve conductor (18) during the read mode so that the shunt path is open, thereby allowing the flux sensing means (19) to operate and sense the readout signal.

摘要翻译： 可用于带式装置的薄膜读写磁头包括由两个薄膜磁性层（P1，P2）构成的磁路，该薄膜磁性层形成分成三个紧密间隔的部分（22,24,26）的磁轭， 至少一个磁性层（P1，P2）的中心部分（24）包含一个间隙，其中位于其中的一个磁阻感应元件（199），如磁阻器件或霍尔效应器件。 除了换向间隙（G）之外，三段磁轭形成连续的磁路，该电路由对应于磁轭的三个部分（22,24,26）的三个部分组成。 总间隙宽度决定正在记录的数据轨迹（30）的宽度（Ww）。 在写入模式期间，包括电子导体的电磁阀（18）提供旁通通路感测装置（19）的分流路径，使得头部的所有三个部分（22,24,26）都进行记录。 在读取模式期间，只有中心磁轭部分（24）及其传感间隙（G）部分感测记录在磁带上的数据信号，并且读取元件检测感测到的信号。 在读取模式期间，饱和电流被引导到阀导体（18），使得分路路径打开，从而允许磁通感测装置（19）操作和感测读出信号。

公开(公告)号：EP0789250A2

公开(公告)日：1997-08-13

申请号：EP97101731.4

申请日：1997-02-04

申请人： READ-RITE CORPORATION

发明人： Lederman, Marcos M. ,  Kroes, Derek Jan

IPC分类号： G01R33/09 ,  G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/3996

摘要： A giant magnetoresistive (GMR) transducer employs a pair of flux guide yoke members (14, 15) that define a magnetic transducing gap (G). A GMR structure (11) formed of stack of multiple layers (11b, 11c, 11d) is located away from the transducing gap (G) between spaced portions of one of the flux guide yoke members (14, 15) and is electrically connected to the facing surfaces of these spaced portions. When a sense current is supplied through the spaced portions of the one flux guide member (14, 15) and through the GMR structure (11), a current-in-the-plane (CIP) mode of operation of the transducer is effectuated. Magnetic bias (21) is supplied to the GMR structure either by a permanent magnet or by a current-carrying bias conductor.

摘要翻译： 巨磁阻（GMR）传感器采用限定磁转换间隙（G）的一对磁通引导轭构件（14,15）。 由堆叠的多层（11b，11c，11d）形成的GMR结构（11）位于远离导磁轭构件（14,15）之一的间隔部分之间的换能间隙（G），并且电连接到 这些间隔部分的相对表面。 当通过一个磁通引导构件（14,15）的间隔部分并通过GMR结构（11）提供感测电流时，实现换能器的平面（CIP）工作模式。 磁偏置（21）由永磁体或载流偏压导体提供给GMR结构。

公开(公告)号：EP0638893A3

公开(公告)日：1996-05-15

申请号：EP94112441.4

申请日：1994-08-09

申请人： READ-RITE CORPORATION

发明人： Nepela, Daniel A. ,  Valstyn, Erich P. ,  Kroes, Derek Jan

IPC分类号： G11B5/33 ,  G11B5/37 ,  G11B5/39

CPC分类号： G11B5/3967 ,  G11B5/2452 ,  G11B5/313 ,  G11B5/332 ,  G11B5/374

摘要： A thin film read-write magnetic head useful in a tape apparatus includes a magnetic circuit consisting of two thin film magnetic layers (P1, P2) which form a magnetic yoke that is divided into three closely spaced sections (22, 24, 26), the central section (24) of at least one of the magnetic layers (P1, P2) containing an interspace in which a flux sensing element (199), such as a magnetoresistive device or Hall effect device, is located. The three section yoke forms a continuous magnetic circuit, except for the transducing gap (G), which circuit consists of three sections corresponding to the three sections (22, 24, 26) of the yoke. The total gap width determines the width (Ww) of the data track (30) being recorded. During the write mode, a magnetic valve (18) including an electronical conductor provides a shunt path to bypass the flux sensing means (19) so that all three sections (22, 24, 26) of the head operate for recording. During the read mode, only the central yoke section (24) and its transducing gap (G) portion sense the data signal recorded on the magnetic tape, and the read element detects the sensed signal. A saturation current is directed to the valve conductor (18) during the read mode so that the shunt path is open, thereby allowing the flux sensing means (19) to operate and sense the readout signal.

公开(公告)号：EP0789250A3

公开(公告)日：1997-10-01

申请号：EP97101731.4

申请日：1997-02-04

申请人： READ-RITE CORPORATION

发明人： Lederman, Marcos M. ,  Kroes, Derek Jan

IPC分类号： G01R33/09 ,  G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/3996

摘要： A giant magnetoresistive (GMR) transducer employs a pair of flux guide yoke members (14, 15) that define a magnetic transducing gap (G). A GMR structure (11) formed of stack of multiple layers (11b, 11c, 11d) is located away from the transducing gap (G) between spaced portions of one of the flux guide yoke members (14, 15) and is electrically connected to the facing surfaces of these spaced portions. When a sense current is supplied through the spaced portions of the one flux guide member (14, 15) and through the GMR structure (11), a current-in-the-plane (CIP) mode of operation of the transducer is effectuated. Magnetic bias (21) is supplied to the GMR structure either by a permanent magnet or by a current-carrying bias conductor.

摘要翻译： 巨磁阻（GMR）换能器采用一对磁通量导向轭架构件（14,15），它们限定磁换能间隙（G）。 由多层堆叠（11b，11c，11d）形成的GMR结构（11）远离换能间隙（G）定位在磁通量导向轭架构件（14,15）之一的间隔部分之间，并且电连接到 这些间隔部分的相对表面。 当感测电流通过一个通量引导构件（14,15）的间隔部分并通过GMR结构（11）供应时，实现换能器的平面电流（CIP）操作模式。 磁偏置（21）通过永磁体或载流偏置导体提供给GMR结构。

公开(公告)号：EP0789350A2

公开(公告)日：1997-08-13

申请号：EP97101649.8

申请日：1997-02-03

申请人： READ-RITE CORPORATION

发明人： Lederman, Marcos M. ,  Kroes, Derek Jan

IPC分类号： G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3925 ,  G11B5/3961 ,  G11B2005/3996

摘要： A giant magnetoresistive (GMR) thin film transducer employs a pair of flux guide pole members (14, 15) that define a magnetic transducing gap (G). A GMR structure (11) formed of a stack of multiple layers (11b, 11c, 11d) is located between spaced portions of one of the flux guide pole members (14, 15) and away from the transducing gap (G). Bias current is supplied in a CPP (current perpendicular to the plane) mode. In an alternative embodiment, a plurality of such GMR structures (21) are connected together serially to provide a larger output signal than that obtained with a single GMR stack.

摘要翻译： 换能器包括彼此间隔开的两个磁通引导构件，以形成磁换能器间隙。 在磁通引导构件中设置有几个间隔开的多层巨磁阻（GMR）结构（21），使结构位于由磁记录介质引起的磁通的路径中。 设置在间隔开的GMR结构之间的电导体电串联连接以增加换能器的总电阻。 电流源连接到电导体，允许电流沿垂直于各层平面的方向流动。 通过施加垂直于感应场的磁场的永久磁铁将磁偏压（31）提供给GMR结构。

公开(公告)号：EP0789350A3

公开(公告)日：1998-03-04

申请号：EP97101649.8

申请日：1997-02-03

申请人： READ-RITE CORPORATION

发明人： Lederman, Marcos M. ,  Kroes, Derek Jan

IPC分类号： G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3925 ,  G11B5/3961 ,  G11B2005/3996

摘要： A giant magnetoresistive (GMR) thin film transducer employs a pair of flux guide pole members (14, 15) that define a magnetic transducing gap (G). A GMR structure (11) formed of a stack of multiple layers (11b, 11c, 11d) is located between spaced portions of one of the flux guide pole members (14, 15) and away from the transducing gap (G). Bias current is supplied in a CPP (current perpendicular to the plane) mode. In an alternative embodiment, a plurality of such GMR structures (21) are connected together serially to provide a larger output signal than that obtained with a single GMR stack.

公开(公告)号：EP0687525A1

公开(公告)日：1995-12-20

申请号：EP95108941.6

申请日：1995-06-09

申请人： READ-RITE CORPORATION

发明人： Gooden, Carroll S. ,  Kroes, Derek Jan

IPC分类号： B24B37/04

CPC分类号： B24B37/048 ,  B24B37/02

摘要： A system for providing a predefined curvature to the distal end of a transducer (5), in which a flat lapping plate (11) is rotated about an axis while the transducer distal end is disposed in a lapping engagement with the lapping plate (11). A rocker mechanism (26) imparts a rocking motion to the transducer about a pivotal axis. A control system (40) provides an output control signal which can vary the rocking rate, the extent of rocking motion, and the force applied in accordance with an input control signal obtained from the element being lapped or from other sensing devices.

摘要翻译： 一种用于向换能器（5）的远端提供预定曲率的系统，其中平面研磨板（11）围绕轴线旋转，同时换能器远端设置成与研磨板（11）的研磨接合， 。 摇臂机构（26）围绕枢转轴线向换能器施加摇摆运动。 控制系统（40）提供输出控制信号，该输出控制信号可以改变摇摆速率，摇摆运动的程度以及根据从被重新研磨的元件获得的输入控制信号或从其它感测装置施加的力。