公开(公告)号：US08068301B2

公开(公告)日：2011-11-29

申请号：US12414607

申请日：2009-03-30

Applicant: Matthew P. Dugas

Inventor： Matthew P. Dugas

IPC: G11B5/09

CPC classification number: G11B5/00826 ,  G11B5/29 ,  G11B5/3163 ,  G11B5/3183

Abstract: Magnetic media made using planar magnetic heads. A head may comprise a substrate having conductive thru-hole vias extending therethrough, a first magnetic layer deposited and patterned on the substrate, a first insulation layer deposited and patterned on the first magnetic layer, a conductive coil layer deposited and patterned on the first insulation layer and connected to the conductive thru-hole vias, a second insulation layer deposited and patterned on the conductive coil layer, vias patterned into the insulation layer extending to the first magnetic layer, a second magnetic layer deposited in the vias, and a third magnetic layer deposited and patterned on the second insulation layer and second magnetic layer. The third magnetic layer may be connected to the first magnetic layer through the second magnetic layer deposited in the vias of the insulation layers.

Abstract translation: 使用平面磁头制造的磁性介质。 头可以包括具有穿过其中延伸的导电通孔的衬底的衬底，在衬底上沉积和图案化的第一磁性层，在第一磁性层上沉积和图案化的第一绝缘层，在第一绝缘层上沉积和图案化的导电线圈层 并且连接到导电通孔通孔，在导电线圈层上沉积和图案化的第二绝缘层，图案化成延伸到第一磁性层的绝缘层的通孔，沉积在通孔中的第二磁性层，以及第三磁性层 层沉积并图案化在第二绝缘层和第二磁性层上。 第三磁性层可以通过沉积在绝缘层的通孔中的第二磁性层连接到第一磁性层。

公开(公告)号：US20100321824A1

公开(公告)日：2010-12-23

申请号：US12829883

申请日：2010-07-02

Applicant: Matthew P. Dugas ,  Gregory L. Wagner ,  Marlow L. Roberts

Inventor： Matthew P. Dugas ,  Gregory L. Wagner ,  Marlow L. Roberts

IPC: G11B5/265 ,  G11B5/78

CPC classification number: G11B5/3116 ,  G11B5/265 ,  G11B5/3183 ,  G11B5/584

Abstract: A magnetic head and method for making same which can be used for formatting or writing servo tracks or data on a tape. In one example, the magnetic head may include a magnetic thin film layer; at least one gap defined in the magnetic thin film layer; and at least one secondary sub-gap structure within the magnetic thin film layer, the at least one gap positioned proximate the at least one secondary sub-gap structure. Through the use of the secondary sub-gap structure, the gap (i.e. a record gap or channel) can be made thinner than in conventional heads.

Abstract translation: 一种磁头及其制造方法，可用于在磁带上格式化或写入伺服磁道或数据。 在一个示例中，磁头可以包括磁性薄膜层; 限定在所述磁性薄膜层中的至少一个间隙; 以及在所述磁性薄膜层内的至少一个次级间隙结构，所述至少一个间隙位于所述至少一个次级间隙结构附近。 通过使用次级间隙结构，可以使间隙（即，记录间隙或通道）比常规头部更薄。

公开(公告)号：US20100296192A1

公开(公告)日：2010-11-25

申请号：US12853049

申请日：2010-08-09

Applicant: Matthew P. Dugas

Inventor： Matthew P. Dugas

IPC: G11B5/127

CPC classification number: G11B5/31 ,  G11B5/23 ,  G11B5/232 ,  G11B5/295 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/3163 ,  G11B5/3166 ,  G11B5/3183 ,  G11B5/58 ,  G11B5/584

Abstract: A thin-film magnetic recording head utilizing a timing based servo pattern is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined by the thin film. The gap pattern includes termination patterns or endpoints that are elliptical or diamond-shaped.

Abstract translation: 利用基于定时的伺服图案的薄膜磁记录头通过将导磁薄膜溅射到基底上来制造。 间隙图案，优选基于时序的图案由薄膜限定。 间隙图案包括椭圆形或菱形的端接图案或端点。

公开(公告)号：US07450341B2

公开(公告)日：2008-11-11

申请号：US11120640

申请日：2005-05-03

Applicant: Matthew P. Dugas ,  Theodore A. Schwarz

Inventor： Matthew P. Dugas ,  Theodore A. Schwarz

IPC: G11B21/02 ,  G11B5/584

CPC classification number: G11B5/3103 ,  G11B5/3163 ,  G11B5/3173 ,  G11B5/3179 ,  G11B5/3183 ,  G11B5/584

Abstract: An arbitrary gap thin film magnetic recording head is fabricated by forming a substrate based on traditional vertical planar thin film head wafer technology which is designed to produce an integrated subgap and subpole substrate structure. The recording head includes a pair of magnetically permeable thin film subpoles, separated by a low permeability subgap structure. An electrically conductive coil may be embedded, in part, within the subgap structure. Thus, the subpoles and subgap structure form part of a magnetic circuit. A highly permeable magnetic surface film spans from one subpole to the other having one or more arbitrary gap patterns. That is, a surface thin film is deposited and patterned on the tape bearing surface of the head to optimize various element configurations, gap patterns and head-to-tape medium contact.

Abstract translation: 通过基于传统的垂直平面薄膜头晶片技术形成基板来制造任意的间隙薄膜磁记录头，该技术被设计成产生集成的子间隙和亚极基底结构。 记录头包括由低渗透性子隙结构隔开的一对导磁薄膜子笔。 导电线圈可以部分地嵌入在子间隙结构内。 因此，亚极和次间隙结构形成磁路的一部分。 高度可渗透的磁性表面膜从一个子极跨越到具有一个或多个任意间隙图案的另一个。 也就是说，表面薄膜被沉积并图案化在头部的带承载表面上，以优化各种元件构造，间隙图案和头对带介质接触。

公开(公告)号：US07450340B2

公开(公告)日：2008-11-11

申请号：US11001271

申请日：2004-11-30

Applicant: Edward Hin Pong Lee ,  David John Seagle

Inventor： Edward Hin Pong Lee ,  David John Seagle

IPC: G11B5/29

CPC classification number: G11B5/3183 ,  G11B5/00817 ,  G11B5/3103 ,  G11B5/3163

Abstract: The structure for a closely spaced, coplanar tape head array is disclosed. Narrow pitch is obtained by utilizing an overlapping coil structure, wherein write coils of adjacent heads overlap. The overlap is made possible by placing coils of adjacent heads at different levels within the thin film structure, separated by dielectric insulating layers.

Abstract translation: 公开了一种紧密间隔的共面磁带阵列的结构。 通过利用重叠的线圈结构获得窄间距，其中相邻头部的写入线圈重叠。 通过将相邻头部的线圈放置在薄膜结构内的不同级别，由介电绝缘层分开来实现重叠。

公开(公告)号：US20060226835A1

公开(公告)日：2006-10-12

申请号：US11455331

申请日：2006-06-19

Applicant: Nobukiyo Kobayashi ,  Kiwamu Shirakawa ,  Yasushi Kaneta

Inventor： Nobukiyo Kobayashi ,  Kiwamu Shirakawa ,  Yasushi Kaneta

IPC: G01R33/02

CPC classification number: G01R33/09 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3925 ,  Y10T29/49002

Abstract: A method of manufacturing a thin film magnetic sensor comprising: forming a projection on a surface of an insulating substrate formed of an insulating nonmagnetic material by removing an unnecessary portion of the insulating substrate from a surface region thereof or by depositing a thin film formed of an insulating nonmagnetic material on the surface of the insulating substrate; forming a pair of thin film yokes positioned to face each other with the projection interposed therebetween and completely electrically separated from each other, the thin film yokes being formed by depositing a thin film formed of a soft magnetic material on the surface of the insulating substrate having the projection formed thereon, followed by partially removing the thin film formed of the soft magnetic material until at least a tip surface of the projection is exposed to the outside; and depositing a GMR film having an electrical resistivity higher than that of the soft magnetic material on the tip surface of the projection and on upper surfaces of the thin film yokes contiguous to the projection such that the GMR film is electrically connected to the upper surfaces of the thin film yokes.

Abstract translation: 一种制造薄膜磁传感器的方法，包括：通过从其表面区域去除绝缘基板的不需要部分，或者通过沉积由绝缘非磁性材料形成的薄膜，形成由绝缘非磁性材料形成的绝缘基板的表面上的突起 在绝缘基板的表面上绝缘非磁性材料; 形成一对薄膜轭，该薄膜磁轭定位成彼此面对并具有彼此完全电气分离的彼此面对的薄膜磁轭，所述薄膜磁轭是通过在绝缘衬底的表面上沉积由软磁性材料形成的薄膜而形成的， 突起形成在其上，随后部分地去除由软磁性材料形成的薄膜，直到凸起的至少一个尖端表面暴露于外部; 以及将具有比软磁性材料的电阻率高的电阻率的GMR膜沉积在突起的尖端表面上以及与突起相邻的薄膜轭的上表面上，使得GMR膜电连接到 薄膜轭。

公开(公告)号：US07095585B2

公开(公告)日：2006-08-22

申请号：US10970782

申请日：2004-10-20

Applicant: Alexander P. Payne ,  William C. Cain ,  Michael E. Devillier ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Darren T. Imai ,  Dimitre A. Latev ,  David D. Roberts

Inventor： Alexander P. Payne ,  William C. Cain ,  Michael E. Devillier ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Darren T. Imai ,  Dimitre A. Latev ,  David D. Roberts

IPC: G11B5/147 ,  G11B5/235

CPC classification number: G11B5/6005 ,  G11B5/1278 ,  G11B5/3106 ,  G11B5/3176 ,  G11B5/3183 ,  G11B5/3967 ,  G11B5/6076

Abstract: An information storage system includes a transducer having a loop of ferromagnetic material with pole tips separated by an nonferromagnetic gap located adjacent to a medium such as a rigid disk. During writing the separation between the pole tips and the media layer of the disk is a small fraction of the gap separation. Due to the small separation between the pole tips and the media layer, the magnetic field generated by the transducer and felt by the media has a larger perpendicular than longitudinal component, favoring perpendicular recording over longitudinal recording. The media may have an easy axis of magnetization oriented substantially along the perpendicular direction, so that perpendicular data storage is energetically favored. The transducer may also include a magnetoresistive sensor for reading magnetic information from the disk.

公开(公告)号：US20050264945A1

公开(公告)日：2005-12-01

申请号：US11172734

申请日：2005-07-01

Applicant: Mohamad Krounbi ,  Mark Re

Inventor： Mohamad Krounbi ,  Mark Re

IPC: G11B5/012 ,  G11B5/127 ,  G11B5/17 ,  G11B5/265 ,  G11B5/31 ,  G11B5/33 ,  G11B5/39 ,  G11B5/48 ,  G11B19/04

CPC classification number: G11B5/3954 ,  G11B5/2652 ,  G11B5/3113 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3967 ,  G11B5/4886 ,  G11B19/04 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/4906

Abstract: A horizontal combined head is provided which has both a thin film write and an MR read element located at an air bearing surface (ABS). The read element can be formed with a track width that is independent of the track width of the write element. The MR sensor or the read element is separated from one of the first and second pole pieces of the write element by an insulation layer. Accordingly, the shields for the read element remain more stable after a write operation. In one embodiment of the present invention a single stripe MR sensor is employed while in a second embodiment a dual stripe MR sensor is employed. A method of the invention includes forming the dual MR stripe in a single process step so that the dual MR stripes of the dual MR sensor are near identical for implementing near absolute common mode rejection of noise.

公开(公告)号：US06804089B2

公开(公告)日：2004-10-12

申请号：US10424844

申请日：2003-04-29

Applicant: Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

Inventor： Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

IPC: G11B527

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/3183 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/3996

Abstract: The objective of this invention is to provide a yoke-type magnetic head and a magnetic recording device in which Barkhausen noise is low. It is possible to induce a magnetic flux efficiently within a magnetic head by using a granular magnetic film that exhibits both soft magnetic properties and a high resistance, which suppresses any shunt of the flow of the sense current into the magnetic yokes, thus preventing any deterioration insensitivity. Since this means that eddy currents can be suppressed, even during use in high-frequency regions, the frequency response characteristics are also improved. In addition, since the magnetic grains within the granular magnetic film are nano-sized, the dimensions of magnetic domains therein are also miniaturized to match that size, and thus there is also substantially no movement of the magnetic domain walls and this miniaturization also makes it possible to suppress the generation of Barkhausen noise. A similar effect can also be obtained by inducing maze domains within the magnetic yokes.

Abstract translation: 本发明的目的是提供一种轭型磁头和一种其中巴克豪森噪声低的磁记录装置。 通过使用表现出软磁性能和高电阻的粒状磁性膜，能够有效地在磁头内引起磁通，这抑制了磁轭中感应电流流动的任何分流，从而防止任何劣化 不敏感。 由于这意味着即使在高频区域使用时也能够抑制涡流，所以也提高了频率响应特性。 此外，由于粒状磁性膜内的磁性粒子是纳米尺寸的，因此其中的磁畴的尺寸也小型化以与该尺寸相匹配，因此也基本上没有磁畴壁的移动，并且这种小型化也使得它 可能抑制巴克豪森噪音的产生。 通过诱导磁轭内的迷宫结构也可以获得类似的效果。

公开(公告)号：US20040120073A1

公开(公告)日：2004-06-24

申请号：US10705206

申请日：2003-11-10

Inventor： Matthew P. Dugas

IPC: G11B005/23 ,  G11B005/147

CPC classification number: G11B5/59633 ,  G11B5/23 ,  G11B5/232 ,  G11B5/295 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/3163 ,  G11B5/3166 ,  G11B5/3183 ,  G11B5/58 ,  G11B5/584 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49055 ,  Y10T29/49057 ,  Y10T29/4906 ,  Y10T29/49067 ,  Y10T428/31826

Abstract: A thin film magnetic recording head utilizing a timing based servo pattern is fabricated using a focused ion beam (FIB). The recording head is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined on the thin film and the FIB cuts a gap through the thin film based on that pattern. Once completed, the recording head is used to write a servo track onto magnetic tape. The timing based servo track then allows for the precise alignment of data read heads based on the positional information obtained by a servo read head which scans the continuously variable servo track.

Abstract translation: 使用聚焦离子束（FIB）制造利用基于定时的伺服图案的薄膜磁记录头。 通过将导磁薄膜溅射到基底上来制造记录头。 间隙图案，优选基于时序的图案被限定在薄膜上，并且FIB基于该图案切割穿过薄膜的间隙。 一旦完成，记录头用于将伺服轨迹写入磁带。 基于定时的伺服磁道然后基于扫描连续可变伺服磁道的伺服读取头获得的位置信息，允许数据读取头的精确对准。