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公开(公告)号：US4511942A
公开(公告)日：1985-04-16
申请号：US375714
申请日：1982-05-07
Applicant: Erich P. Valstyn
Inventor： Erich P. Valstyn
CPC classification number: G11B5/1871 , B23Q17/20 , G11B5/3166 , Y10T29/49036 , Y10T29/49037
Abstract: A lapping guide is provided to determine the position at which lapping of a thin film head to define pole faces should be terminated. Accurate positioning of the lapping guide with respect to the head is insured by forming various elements of the lapping guide during the same photolithographic process steps as those used to form elements of the head. The lapping guide may be used either as an electrical or optical guide. When used as an optical guide, a second lapping guide may be provided as an indicator that more frequent inspection is necessary.
Abstract translation: 提供研磨引导件以确定要终止限定极面的薄膜头的研磨的位置。 通过在与用于形成头部元件的光刻工艺相同的光刻工艺步骤中形成研磨导向器的各种元件来保证研磨导向件相对头部的精确定位。 研磨导向器可以用作电导或光导。 当用作光导时，可以提供第二研磨引导件作为需要更频繁检查的指示器。
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公开(公告)号：US5436779A
公开(公告)日：1995-07-25
申请号：US220486
申请日：1994-03-31
Applicant: Erich P. Valstyn
Inventor： Erich P. Valstyn
CPC classification number: G11B5/3967 , G11B5/332 , G11B5/374 , G11B5/245
Abstract: A thin film read-write magnetic head includes first and second adjacent magnetic layers forming a magnetic circuit path with a transducing gap, a flux sensing element disposed in the plane of one of the magnetic layers, at least one magnetic shunt valve member disposed around the flux sensing element, the valve member being disposed in the same plane as the one of the magnetic layers in which the sensing element is disposed. A conductor is electrically connected to the flux sensing member and magnetically coupled to the shunt valve member to apply a magnetic field to the shunt valve member to magnetically control the shunt valve member.
Abstract translation: 薄膜读写磁头包括形成具有换能间隙的磁路路径的第一和第二相邻磁性层，设置在一个磁层的平面中的磁通感测元件，至少一个磁分流阀构件 磁通感测元件，阀构件设置在与设置感测元件的磁性层中的一个相同的平面中。 导体电连接到磁通感测构件并且磁耦合到分流阀构件，以将磁场施加到分流阀构件以磁控制分流阀构件。
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公开(公告)号：US5452168A
公开(公告)日：1995-09-19
申请号：US280577
申请日：1994-07-25
Applicant: Daniel A. Nepela , Shih-Cheng Cheng , Erich P. Valstyn , Edgar M. Williams , Peter G. Bischoff
Inventor： Daniel A. Nepela , Shih-Cheng Cheng , Erich P. Valstyn , Edgar M. Williams , Peter G. Bischoff
CPC classification number: G11B5/313 , G11B5/3163
Abstract: A thin film magnetic head is fabricated with a multiplicity of magnetic yokes that interact effectively with an electrical coil. The magnetic P1 and P2 pole sections of the yoke are very narrow and form closely spaced envelopes about the coil. The multiple yokes are inductively linked to the coil so as to provide an increased number of flux interactions for a given length of coil turn. With this magnetic head design, signal output is increased, thermal noise is reduced, and the signal-to-noise ratio is effectively improved.
Abstract translation: 制造具有与电线圈有效相互作用的多个磁轭的薄膜磁头。 轭的磁性P1和P2极部非常窄，并且围绕线圈形成紧密间隔的包络。 多个轭体与线圈感应连接，以便在给定长度的线圈匝中提供增加数量的磁通相互作用。 利用这种磁头设计，信号输出增加，热噪声降低，并且有效地提高了信噪比。
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公开(公告)号：US6078479A
公开(公告)日：2000-06-20
申请号：US500741
申请日：1995-07-11
Applicant: Daniel A. Nepela , Erich P. Valstyn , Derek Jan Kroes
Inventor： Daniel A. Nepela , Erich P. Valstyn , Derek Jan Kroes
Abstract: A thin film read-write magnetic head useful in a tape apparatus includes a magnetic circuit consisting of two thin film magnetic layers which form a magnetic yoke that is divided into three closely spaced sections, the central section of at least one of the magnetic layers containing an interspace in which a flux sensing element, 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, which circuit consists of three sections corresponding to the three sections of the yoke. The total gap width determines the width of the data track being recorded. During the write mode, a magnetic valve including an electrical conductor provides a shunt path to bypass the flux sensing means so that all three sections of the head operate for recording. During the read mode, only the central yoke section and its transducing gap 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 during the read mode so that the shunt path is open, thereby allowing the flux sensing means to operate and sense the readout signal.
Abstract translation: 用于带式装置的薄膜读写磁头包括由两个薄膜磁性层构成的磁路，该磁性层形成一个磁轭，该磁轭分成三个紧密隔开的部分，至少一个磁性层的中心部分包含 诸如磁阻器件或霍尔效应器件的磁通感测元件所在的间隙。 三段磁轭形成一个连续磁路，除了换向间隙，该电路由对应于磁轭的三个部分的三个部分组成。 总间隙宽度决定要记录的数据轨道的宽度。 在写入模式期间，包括电导体的电磁阀提供旁通通路感测装置的分流路径，使得头部的所有三个部分都进行记录。 在读取模式期间，仅中心磁轭部分和其传感间隙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，使得分路路径打开，从而允许磁通感测装置操作和感测读出信号。
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Patent Agency Ranking
公开(公告)号：US5309305A
公开(公告)日：1994-05-03
申请号：US976536
申请日：1992-11-16
Applicant: Daniel A. Nepela , Erich P. Valstyn
Inventor： Daniel A. Nepela , Erich P. Valstyn
CPC classification number: G11B5/3954 , G11B5/3967
Abstract: A read/write head includes a dual element MR sensor and a superimposed inductive head. In an implementation of the invention, the MR sensor structure includes two spaced magnetoresistive (MR) elements on which antiferromagnetic (AFe) thin films, preferably of iron manganese, are deposited. The AFe thin films act as exchange bias layers with the MR elements, biasing the MR layers in opposite directions and perpendicular to the surface of a magnetic medium. Recorded magnetic signals are sensed differentially and the output signal is characterized by increased amplitude and improved signal-to-noise ratio.
Abstract translation: 读/写头包括双元件MR传感器和叠加的感应头。 在本发明的实施方案中，MR传感器结构包括两个间隔开的磁阻（MR）元件，其上沉积优选铁锰的反铁磁（AFe）薄膜。 AFe薄膜作为具有MR元件的交换偏置层，以相反方向偏置MR层并且垂直于磁介质的表面。 记录的磁信号被差分地感测，并且输出信号的特征在于增加的振幅和改善的信噪比。
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公开(公告)号：US5255141A
公开(公告)日：1993-10-19
申请号：US807194
申请日：1991-12-16
Applicant: Erich P. Valstyn , Daniel A. Nepela
Inventor： Erich P. Valstyn , Daniel A. Nepela
CPC classification number: G11B5/3925 , G11B5/332 , G11B5/37 , G11B5/3903
Abstract: A thin film read-write magnetic head includes a write inductive section having a magnetic circuit consisting of thin film magnetic layers and a read flux sensing element, such as a magnetoresistive device or Hall effect device, located in a gap in the magnetic circuit. During the write mode, a magnetic valve including an electrical conductor provides a shunt path to bypass the flux sensing element. During the read mode, a saturation current is directed to the valve conductor so that the shunt path is open, thereby allowing the flux sensing element to sense the readout signal.
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公开(公告)号：US5917680A
公开(公告)日：1999-06-29
申请号：US668859
申请日：1996-06-24
Applicant: Erich P. Valstyn , Charles R. Bond , Daniel A. Nepela
Inventor： Erich P. Valstyn , Charles R. Bond , Daniel A. Nepela
CPC classification number: G11B5/00 , G11B5/012 , G11B5/02 , G11B2005/0008 , G11B2005/0018 , G11B5/09 , G11B5/3922
Abstract: A magnetoreristive head assembly has a magnetic bias level control for continuous compensation of thermal, stray field and stress fluctuations, as well as other types of fluctuations. The magnetoresistive head assembly includes a magnetoresistive element for sensing signals recorded on a magnetic medium, and for generating electrical signals corresponding to the recorded signals. A bias current balancing circuit has an input connected to the magnetoresistive element for sensing the electrical signals and for generating a correction bias current therefrom. A feedback correction circuit converts the correction bias current into a correction magnetic bias field and applies the field to the magnetoresistive element to limit the shifting of a current bias point of the magnetoresistive element and to compensate for bias fluctuations.
Abstract translation: 磁电磁头组件具有用于连续补偿热，杂散场和应力波动以及其它类型波动的磁偏置电平控制。 磁阻头组件包括用于感测记录在磁介质上的信号并用于产生对应于记录信号的电信号的磁阻元件。 偏置电流平衡电路具有连接到磁阻元件的输入端，用于感测电信号并从中产生校正偏置电流。 反馈校正电路将校正偏置电流转换成校正磁偏置场，并将场施加到磁阻元件以限制磁阻元件的电流偏置点的偏移并补偿偏置波动。
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公开(公告)号：US4841625A
公开(公告)日：1989-06-27
申请号：US592346
申请日：1984-05-03
Applicant: Erich P. Valstyn
Inventor： Erich P. Valstyn
CPC classification number: G11B5/1871 , B23Q17/20 , G11B5/3166 , Y10T29/49004 , Y10T29/49037 , Y10T29/49044
Abstract: A lapping guide is provided to determine the position at which lapping of a thin film head to define pole faces should be terminated. Accurate positioning of the lapping guide with respect to the head is insured by forming various elements of the lapping guide during the same photolithographic process steps as those used to form elements of the head. The lapping guide may be used either as an electrical or optical guide. When used as an optical guide, a second lapping guide may be provided as an indicator that more frequency inspection is necessary.
Abstract translation: 提供研磨引导件以确定要终止限定极面的薄膜头的研磨的位置。 通过在与用于形成头部元件的光刻工艺相同的光刻工艺步骤中形成研磨导向器的各种元件来保证研磨导向件相对头部的精确定位。 研磨导向器可以用作电导或光导。 当用作光导时，可以提供第二研磨引导件作为需要进行更多频率检查的指示器。
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公开(公告)号：US4371905A
公开(公告)日：1983-02-01
申请号：US206461
申请日：1980-11-13
Applicant: Erich P. Valstyn , G. Vinson Kelley
Inventor： Erich P. Valstyn , G. Vinson Kelley
Abstract: A differential Hall effect magnetic read head exhibiting improved resolution. The head includes dual Hall elements in which the elements are oriented so that their major surface is perpendicular to the surface of the recording medium and biased so that they respond to the component of magnetic flux which is parallel to the surface of the recording medium. Operation in this manner enables information recorded at extremely high densities to be easily read. In an alternative embodiment, a single Hall element is utilized and direct and delayed outputs are differentially compared in order to detect flux transitions.
Abstract translation: 差分霍尔效应磁读头表现出更好的分辨率。 头部包括双霍尔元件，其中元件被定向成使得它们的主表面垂直于记录介质的表面并被偏置，使得它们对平行于记录介质表面的磁通量的分量作出响应。 以这种方式的操作使得能够容易地读取以非常高的密度记录的信息。 在替代实施例中，使用单个霍尔元件，并且差分比较直接和延迟输出以便检测通量转换。
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