公开(公告)号：US5285337A

公开(公告)日：1994-02-08

申请号：US876843

申请日：1992-04-30

Applicant: George L. Best ,  Moris M. Dovek ,  John S. Foster ,  Luis P. Franco ,  Andrew M. Homola

Inventor： George L. Best ,  Moris M. Dovek ,  John S. Foster ,  Luis P. Franco ,  Andrew M. Homola

IPC: G11B21/21 ,  G11B5/60 ,  G11B17/32 ,  G11B21/20 ,  G11B33/14

CPC classification number: G11B5/6005 ,  G11B17/32 ,  G11B21/20 ,  G11B33/148

Abstract: A data recording disk file of the liquid-bearing type has an improved head-disk interface provided by a transducer carrier with new properties. The carrier supports a conventional head for reading and writing data to the disk. The carrier has an air-bearing surface near its front end, a ski pad near its rear end, and a plurality of ski feet or struts which support the air-bearing surface off the liquid film of the disk when the disk file is not operating. The air-bearing surface is in the form of a pair of air-bearing rails located forward and outboard of the rear ski pad so that no air-bearing effect occurs in the rearward region of the carrier to assure the skiing action of the rear ski pad. The struts are separated from the air-bearing rails to not interfere with their air-bearing performance and support the rails away from the liquid film on the disk. In one embodiment there are at least three struts arranged on the carrier so that both the air-bearing rails and the ski pad are supported off the liquid film when the disk file is not operating. As operational speed is approached the air-bearing effect causes the front end of the carrier to rotate about the two rear struts, thus raising the forward strut(s) and the air-bearing rails off the disk and lowering the rear ski pad into contact with the liquid film.

Abstract translation: 液体承载型的数据记录盘文件具有由具有新特性的换能器载体提供的改进的头盘接口。 载体支持用于读取和写入数据到磁盘的常规磁头。 载体在其前端附近具有空气轴承表面，靠近其后端的滑雪板，以及多个滑雪脚或支柱，当盘片未运行时，支撑空气轴承表面离开磁盘的液膜 。 空气轴承表面是位于后部滑雪板前方和外侧的一对空气轴承轨道的形式，使得在行李架的后部区域中不产生空气轴承效应，以确保后部滑雪板的滑雪动作 垫。 支柱与空气轴承轨道分离，不会干扰其空气轴承性能，并支撑导轨远离磁盘上的液膜。 在一个实施例中，在载体上布置有至少三个支柱，使得当盘片未运行时，空气轴承轨道和滑雪板都被支撑在液膜上。 随着操作速度的升高，空气轴承效应会使载体的前端围绕两个后支柱旋转，从而将前支柱和空气支承轨道从盘上升起，并将后滑雪板降低接触 与液膜。

公开(公告)号：US07170719B1

公开(公告)日：2007-01-30

申请号：US09067795

申请日：1998-04-28

Applicant: Moris M. Dovek ,  G. Herbert Lin ,  Michael McNeil

Inventor： Moris M. Dovek ,  G. Herbert Lin ,  Michael McNeil

IPC: G11B5/127 ,  G11B5/33

CPC classification number: G11B5/1278 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/3183 ,  G11B5/3919 ,  G11B5/3967 ,  G11B2005/0002

Abstract: The present invention provides a flux-guided head for use in a magnetic recording system, such as a disk drive. The head includes a write element that is capable of writing magnetic polarity transitions into the surface of a magnetic media, such as a magnetic disk, using vertical/perpendicular recording techniques. Further, a read element is provided that includes a magnetoresistive element that, when reading perpendicularly-recorded magnetic transitions from the surface of the magnetic media, produces a readback pulse signal having a substantially Lorentzian pulse shape.

Abstract translation: 本发明提供一种用于诸如盘驱动器的磁记录系统中的磁通引导头。 磁头包括一个能够使用垂直/垂直记录技术将磁极性转变写入诸如磁盘的磁介质表面的写入元件。 此外，提供了一种读取元件，其包括磁阻元件，当从磁介质的表面读取垂直记录的磁转变时，产生具有基本上洛伦兹脉冲形状的回读脉冲信号。

公开(公告)号：US06172832B2

公开(公告)日：2001-01-09

申请号：US09432919

申请日：1999-11-02

Applicant: Moris M. Dovek ,  Gang Herbert Lin ,  Erhard T. Schreck

Inventor： Moris M. Dovek ,  Gang Herbert Lin ,  Erhard T. Schreck

IPC: G11B503

CPC classification number: G11B19/04 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/59683 ,  G11B2005/0018

Abstract: A magnetic storage system capable of separating thermal signals from data signals is disclosed. The magnetic storage system includes a magnetic media and a head associated with the magnetic media. The head includes a magneto-resistive element which is biased by a modulated bias current. The modulated bias current modulates thermal signals to a first frequency and modulates data signals to at least a second frequency. A method of separating thermal signals from data signals read from a magnetic storage media is also disclosed. The method includes the steps of (1) providing a head for reading information from the magnetic storage media, the head having an MR element; and, (2) biasing the MR element with a modulated bias current.

Abstract translation: 公开了一种能够从数据信号分离热信号的磁存储系统。 磁存储系统包括磁介质和与磁介质相关联的磁头。 磁头包括被调制的偏置电流偏置的磁阻元件。 调制的偏置电流将热信号调制到第一频率，并将数据信号调制到至少第二频率。 还公开了从磁存储介质读取的数据信号中分离热信号的方法。 该方法包括以下步骤：（1）提供用于从磁存储介质读取信息的磁头，磁头具有MR元件; 和（2）用调制的偏置电流偏置MR元件。

公开(公告)号：US5418667A

公开(公告)日：1995-05-23

申请号：US102031

申请日：1993-08-03

Applicant: George L. Best ,  Moris M. Dovek ,  John S. Foster ,  Luis P. Franco ,  Randall T. Kerth

Inventor： George L. Best ,  Moris M. Dovek ,  John S. Foster ,  Luis P. Franco ,  Randall T. Kerth

IPC: G11B5/60 ,  G11B21/21

CPC classification number: G11B5/6005 ,  G11B21/21

Abstract: A data recording disk drive has an improved head-disk interface provided by a transducer carrier which is essentially a low-flying air-bearing slider that is also able to be in contact and near contact with the lubricant film on the disk. The slider has a front air-bearing surface in the form of a pair of equally-spaced air-bearing pads, a rear air-bearing pad, and a central nonair-bearing recessed surface which separates the front and rear air-bearing pads. The two front pads have a surface area greater than that of the rear pad and thus provide a positive pitch up of the slider. This causes the rear pad to also be pitched up so that air can flow beneath the rear pad to generate an air bearing in the rear portion of the slider. The presence of the central nonair-bearing region eliminates any lift in the central part of the slider, which allows for the low-flying height. The flying height of the rear pad of the slider above the disk is controlled by the width of the rear air-bearing pad. The rear pad has its leading edge wider than its trailing edge so that it is able to withstand contact with the lubricant film on the disk, typically at the lower disk velocities near the disk inside diameter, without generating unacceptable drag forces or depleting the lubricant from the disk. The rear pad also has a skewed leading edge which compensates for skew of the slider to minimize the flying height variation from the disk inside diameter to outside diameter.

Abstract translation: 数据记录磁盘驱动器具有由换能器载体提供的改进的磁头 - 磁盘接口，传感器载体基本上是低飞行的空气轴承滑块，其也能够与磁盘上的润滑剂膜接触并接近。 滑块具有一对等间隔的空气轴承瓦片，后空气轴承瓦块和分离前空气轴承座和后空气轴瓦的中央非承载凹面的形式的前空气轴承表面。 两个前垫的表面积大于后垫的表面积，从而提供滑块的正间距向上。 这使得后垫也被倾斜，使得空气可以在后垫的下方流动，以在滑块的后部中产生空气轴承。 中央非承重区域的存在消除了滑块中部的任何升力，这允许低飞行高度。 盘上方滑块后排垫片的飞行高度由后空气轴瓦的宽度控制。 后垫的前缘比其后缘更宽，使得其能够经受与盘上的润滑剂膜的接触，通常在盘的内径附近的较低的盘速度下，不会产生不可接受的阻力或使润滑剂耗尽 磁盘。 后垫还具有倾斜的前缘，其补偿滑块的偏斜以最小化从盘内径到外径的飞行高度变化。

公开(公告)号：US07116531B2

公开(公告)日：2006-10-03

申请号：US10915272

申请日：2004-08-10

Applicant: Moris M. Dovek ,  Tai Min

Inventor： Moris M. Dovek ,  Tai Min

IPC: G11B5/39

CPC classification number: B82Y10/00 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3903 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49055

Abstract: In bottom spin valves of the lead overlay type the longitudinal bias field that stabilizes the device tends to fall off well before the gap is reached. This problem has been overcome by inserting an additional antiferromagnetic layer between the hard bias plugs and the overlaid leads. This additional antiferromagnetic layer and the lead layer are etched in the same operation to define the read gap, eliminating the possibility of misalignment between them. The extra antiferromagnetic layer is also longitudinally biased so there is no falloff in bias strength before the edge of the gap is reached. A process for manufacturing the device is also described.

公开(公告)号：US06779248B2

公开(公告)日：2004-08-24

申请号：US10093107

申请日：2002-03-07

Applicant: Moris M. Dovek ,  Tai Min

Inventor： Moris M. Dovek ,  Tai Min

IPC: G11B5187

CPC classification number: B82Y10/00 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3903 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49055

Abstract: In bottom spin valves of the lead overlay type the longitudinal bias field that stabilizes the device tends to fall off well before the gap is reached. This problem has been overcome by providing a manufacturing process that includes inserting an additional antiferromagnetic layer between the hard bias plugs and the overlaid leads. This additional antiferromagnetic layer and the lead layer are etched in the same operation to define the read gap, eliminating the possibility of misalignment between them. The extra antiferromagnetic layer is also longitudinally biased so there is no falloff in bias strength before the edge of the gap is reached. A process for manufacturing the device is also described.

Abstract translation: 在引线覆盖型的底部自旋阀中，稳定器件的纵向偏置场在达到间隙之前倾向于很好地脱落。 通过提供一种制造方法已经克服了这个问题，该制造方法包括在硬偏压塞和覆盖引线之间插入附加的反铁磁层。 在相同的操作中蚀刻该额外的反铁磁层和引线层以限定读取间隙，从而消除它们之间的未对准的可能性。 额外的反铁磁层也是纵向偏置的，所以在达到间隙的边缘之前，偏压强度没有衰减。 还描述了用于制造该装置的方法。

公开(公告)号：US06606216B1

公开(公告)日：2003-08-12

申请号：US09305536

申请日：1999-05-05

Applicant: Bruce A. Liikanen ,  Moris M. Dovek ,  John C. Purkett

Inventor： Bruce A. Liikanen ,  Moris M. Dovek ,  John C. Purkett

IPC: G11B5596

CPC classification number: G11B5/59683 ,  G11B5/012 ,  G11B5/4886 ,  G11B2005/001

Abstract: A magnetic storage system is disclosed which has one or more rotating disks. In one embodiment, the system includes a first transducer and a second transducer operatively associated with a respective first surface or second surface. Each of the first and second surfaces has a data track with a data region and an embedded servo sector. The first transducer has a data reader which includes a first MR strip and a servo reader which includes a second MR strip. The first MR strip is electrically isolated from the second MR strip. The first transducer performs a servo reading operation of the servo sector while the second a transducer performs either a data writing operation to the data region or a data reading operation from the data region. Also disclosed is a method for reading within a magnetic storage system. The storage system includes a first magnetic surface, a data reader and a servo reader. The first magnetic surface includes a first data region and a first servo sector. The data reader is not coupled to the servo reader. Servo information is read with the servo reader so that an off-track position of the data reader can be determined. After the off-track position is known, the data reader is moved to compensate for the off-track position. Once the data reader is properly positioned, the data reader retrieves user data from the first data region of the first magnetic surface.

Abstract translation: 公开了一种具有一个或多个旋转盘的磁存储系统。 在一个实施例中，系统包括与相应的第一表面或第二表面可操作地相关联的第一换能器和第二换能器。 第一表面和第二表面中的每一个具有带有数据区域和嵌入式伺服扇区的数据轨迹。 第一传感器具有数据读取器，其包括第一MR条和包括第二MR条的伺服读取器。 第一MR条与第二MR条电隔离。 第一传感器执行伺服扇区的伺服读取操作，而第二传感器执行对数据区域的数据写入操作或者从数据区域执行数据读取操作。 还公开了一种在磁存储系统内读取的方法。 存储系统包括第一磁性表面，数据读取器和伺服读取器。 第一磁表面包括第一数据区和第一伺服扇区。 数据读取器不耦合到伺服读取器。 使用伺服读取器读取伺服信息，从而可以确定数据读取器的偏离位置。 在偏离位置被知道之后，数据读取器被移动以补偿偏离位置。 一旦数据读取器被正确定位，数据读取器就从第一磁性表面的第一数据区域检索用户数据。

公开(公告)号：US6104563A

公开(公告)日：2000-08-15

申请号：US16551

申请日：1998-01-30

Applicant: Moris M. Dovek ,  Gang Herbert Lin ,  Erhard T. Schreck

Inventor： Moris M. Dovek ,  Gang Herbert Lin ,  Erhard T. Schreck

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/596 ,  G11B19/04 ,  G11B5/03

CPC classification number: G11B19/04 ,  G11B5/012 ,  G11B5/02 ,  G11B2005/0018 ,  G11B5/09 ,  G11B5/59683

Abstract: A magnetic storage system capable of separating thermal signals from data signals is disclosed. The magnetic storage system includes a magnetic media and a head associated with the magnetic media. The head includes a magneto-resistive element which is biased by a modulated bias current. The modulated bias current modulates thermal signals to a first frequency and modulates data signals to at least a second frequency. A method of separating thermal signals from data signals read from a magnetic storage media is also disclosed. The method includes the steps of (1) providing a head for reading information from the magnetic storage media, the head having an MR element; and, (2) biasing the MR element with a modulated bias current.

Abstract translation: 公开了一种能够从数据信号分离热信号的磁存储系统。 磁存储系统包括磁介质和与磁介质相关联的磁头。 磁头包括被调制的偏置电流偏置的磁阻元件。 调制的偏置电流将热信号调制到第一频率，并将数据信号调制到至少第二频率。 还公开了从磁存储介质读取的数据信号中分离热信号的方法。 该方法包括以下步骤：（1）提供用于从磁存储介质读取信息的磁头，磁头具有MR元件; 和（2）用调制的偏置电流偏置MR元件。

公开(公告)号：US5267104A

公开(公告)日：1993-11-30

申请号：US876236

申请日：1992-04-30

Applicant: Thomas R. Albrecht ,  Moris M. Dovek ,  John S. Foster ,  Andrew M. Homola ,  Timothy C. O'Sullivan

Inventor： Thomas R. Albrecht ,  Moris M. Dovek ,  John S. Foster ,  Andrew M. Homola ,  Timothy C. O'Sullivan

IPC: G11B5/48 ,  G11B5/60 ,  G11B21/21 ,  G11B33/14 ,  G11B17/02

CPC classification number: G11B5/6005 ,  G11B21/21 ,  G11B33/148

Abstract: A data recording disk file of the liquid-bearing type has an improved head-disk interface provided in by a transducer carrier with new properties. The carrier supports a conventional head for reading and writing data to the disk. The carrier has an air-bearing surface near its front end, a ski pad near its rear end, and a plurality of ski feet or struts which support the air-bearing surface off the liquid film of the disk when the disk file is not operating. The air-bearing surface is in the form of a pair of air-bearing rails located outboard of the rear ski pad so that no air-bearing effect occurs in the rearward region of the carrier to assure the skiing action of the rear ski pad. As operational speed is approached the air-bearing lifts the struts off the disk and the rear ski pad is the sole ski foot on the liquid film. The rear ski pad has a convexly shaped leading edge which is wider than its trailing edge to minimize static friction and lubricant thinning during skiing, and the angle between the leading and trailing edges of the pad is selected to enable the pad to ski over the wide ranges of carrier-disk velocity which occur as the carrier moves from disk ID to OD.

公开(公告)号：US5561368A

公开(公告)日：1996-10-01

申请号：US334659

申请日：1994-11-04

Applicant: Moris M. Dovek ,  Robert E. Fontana, Jr. ,  Virgil S. Speriosu ,  Jaquelin K. Spong

Inventor： Moris M. Dovek ,  Robert E. Fontana, Jr. ,  Virgil S. Speriosu ,  Jaquelin K. Spong

IPC: G01R33/09 ,  H01L43/08 ,  G01R33/02

CPC classification number: B82Y25/00 ,  G01R33/093

Abstract: A magnetic field sensor uses four individual magnetoresistive spin valve elements electrically connected in a bridge circuit. The spin valve elements are lithographically formed on the same substrate with their free layers having their magnetization axes parallel to one another. An electrically conductive fixing layer is formed on the substrate but is insulated from the spin valve elements. The application of current through the fixing conductor during fabrication of the field sensor fixes the direction of magnetization of two of the pinned layers to be antiparallel to the direction of magnetization of the other two pinned layers. The bridge circuit output voltage is responsive to an external magnetic field in the plane of the sensor. By appropriate fixing of the direction of magnetization of the pinned layers during sensor fabrication, and appropriate connection to the input and output leads, the bridge circuit output voltage is a measure of either the magnetic field or field gradient. The fixing conductor, or a separate current strap formed on the substrate, can be used to pass an unknown current over the sensor, in which case the bridge circuit output voltage is a measure of the unknown current.

Abstract translation: 磁场传感器使用在桥式电路中电连接的四个单独的磁阻自旋阀元件。 自旋阀元件光刻地形成在相同的基板上，其自由层的磁化轴线彼此平行。 在基板上形成导电固定层，但与自旋阀元件绝缘。 在场传感器的制造期间通过固定导体的电流的施加将两个被钉扎层的磁化方向固定成与其他两个钉扎层的磁化方向反平行。 桥接电路输出电压响应于传感器平面内的外部磁场。 通过在传感器制造期间适当地固定被钉扎层的磁化方向，以及适当地连接到输入和输出引线，桥接电路输出电压是磁场或场梯度的量度。 可以使用固定导体或形成在基板上的单独的电流带将传感器上的未知电流传递，在这种情况下桥接电路输出电压是未知电流的量度。