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1. 发明授权

US5285339A Magnetoresistive read transducer having improved bias profile 失效
标题翻译：具有改进的偏置轮廓的磁阻读取传感器
公开(公告)号：US5285339A
公开(公告)日：1994-02-08
申请号：US843702
申请日：1992-02-28
申请人： Mao-Min Chen , Kochan Ju , Mohamad T. Krounbi , Ching H. Tsang , Po-Kang Wang
发明人： Mao-Min Chen , Kochan Ju , Mohamad T. Krounbi , Ching H. Tsang , Po-Kang Wang
IPC分类号： G11B5/39 , G11B5/127
CPC分类号： G11B5/3903
摘要： An MR read transducer having passive end regions separated by a central active region comprises an MR layer made from a material having a low uniaxial magnetic anisotropy. A soft magnetic bias layer is adjacent to but spaced from the MR layer in the central region only, and the soft magnetic bias layer is made from a material having a high uniaxial magnetic anisotropy. A longitudinal bias is produced directly in each of the end regions only, and the means for producing the longitudinal bias comprise a layer made from a material having a high uniaxial magnetic anisotropy. Control of the uniaxial anisotropy can be achieved by choosing materials of appropriate magnetostriction or intrinsic uniaxial anisotropy.
摘要翻译：具有由中心有源区域分离的无源端区域的MR读取传感器包括由具有低单轴磁各向异性的材料制成的MR层。软磁偏置层仅与中心区域中的MR层相邻但间隔开，并且软磁偏置层由具有高单轴磁各向异性的材料制成。仅在每个端部区域中直接产生纵向偏压，并且用于产生纵向偏压的装置包括由具有高单轴磁各向异性的材料制成的层。单轴各向异性的控制可以通过选择适当的磁致伸缩材料或固有单轴各向异性来实现。

2. 发明授权

US5452165A Close packed magnetic head linear array 失效
标题翻译：封闭磁头线性阵列
公开(公告)号：US5452165A
公开(公告)日：1995-09-19
申请号：US214902
申请日：1994-03-16
申请人： Mao-Min Chen , Kochan Ju , Mohamad T. Krounbi , Denny D. Tang , Po-Kang Wang
发明人： Mao-Min Chen , Kochan Ju , Mohamad T. Krounbi , Denny D. Tang , Po-Kang Wang
IPC分类号： G11B5/008 , G11B5/012 , G11B5/31 , G11B5/48 , G11B5/56 , G11B5/584 , G11B5/29
CPC分类号： G11B5/3103 , G11B5/3183 , G11B5/4886 , G11B5/4893 , G11B5/56 , G11B5/584 , G11B5/00817 , G11B5/012
摘要： The present invention includes a plurality of thin film magnetic heads which are arranged in a linear array with a spacing D between adjacent heads. The pole pieces of the magnetic heads are positioned in a side by side relationship in contrast to the normal pancake type of magnetic head. The linear array is angled at a skew angle .theta. with respect to the direction of travel of the magnetic medium. The track pitch is then D sin .theta.. The track width is substantially equal to the thickness of the pole tips P1T and P2T of the magnetic heads. This thickness can be in the order of 3 .mu.m. With such a pole tip thickness the track pitch of each magnetic head in the linear array can be 3-4 .mu.m. A plurality of narrow data tracks can then be provided with minimum pitch by a corresponding number of magnetic heads. The write signals are simultaneously fed to the heads or the read signals are simultaneously fed to the heads. This allows high data rates to be processed. The invention also provides different azimuth between adjacent heads to minimize cross talk between the tracks caused by track misregistration. Additional magnetic heads can be employed for servo control as needed.
摘要翻译：本发明包括多个薄膜磁头，其以相邻磁头之间的间隔D布置成线性阵列。与正常的煎饼型磁头相反，磁头的极片与并排的关系定位。线性阵列相对于磁性介质的行进方向以偏斜角θ成角度。轨道间距为Dsinθ。轨道宽度基本上等于磁头的极尖P1T和P2T的厚度。该厚度可以在3μm左右。具有这样的极尖厚度，线阵列中每个磁头的轨道间距可以是3-4μm。然后可以通过相应数量的磁头以最小间距来提供多个窄数据轨道。写入信号被同时馈送到头部，或者读取信号被同时馈送到头部。这样可以处理高数据速率。本发明还提供相邻头部之间的不同方位角，以最小化由轨道重合失调引起的轨道之间的串扰。可根据需要使用额外的磁头进行伺服控制。

3. 发明授权

US5375023A Submicron thin film inductive head with self-aligned staggered pole-tips 失效
标题翻译：亚微米薄膜感应头具有自对准交错极点
公开(公告)号：US5375023A
公开(公告)日：1994-12-20
申请号：US998171
申请日：1992-12-29
申请人： Kochan Ju , Mohamad T. Krounbi , Po-Kang Wang
发明人： Kochan Ju , Mohamad T. Krounbi , Po-Kang Wang
IPC分类号： G11B5/31 , G11B5/23 , G11B5/127 , G11B5/147
CPC分类号： G11B5/3163 , G11B5/3116
摘要： A thin film inductive head having staggered pole-tips with a self-aligned recording gap region. The recording gap region is bounded by stepped pole-tip element with the steps made large with respect to the gap thickness. The pole-tip layers extend back from the air bearing surface to form a throat region that is also large with respect to the gap thickness. The self-aligned staggered pole-tip geometry is suitable for submicron track widths because the pole-tips may themselves be much wider and the self-aligned configuration avoids submicron masking and registration difficulties. The stepped pole-tip surfaces also eliminate the side-writing problem known in the art for overlapping thin film poles.
摘要翻译：具有具有自对准记录间隙区域的交错极尖的薄膜感应头。记录间隙区域由步进的极尖元件限定，相对于间隙厚度的步长较大。极尖层从空气支承表面向后延伸以形成相对于间隙厚度也很大的喉部区域。自对准交错极尖几何形状适用于亚微米轨道宽度，因为极尖本身可能宽得多，并且自对准配置避免了亚微米掩蔽和配准困难。阶梯式极尖表面也消除了本领域已知的用于重叠薄膜极的侧面写入问题。

4. 发明授权

US5079663A Magnetoresistive sensor with track following capability 失效
标题翻译：具有跟踪能力的磁传感器
公开(公告)号：US5079663A
公开(公告)日：1992-01-07
申请号：US471576
申请日：1990-01-29
申请人： Kochan Ju , Mohamad T. Krounbi , Po-Kang Wang
发明人： Kochan Ju , Mohamad T. Krounbi , Po-Kang Wang
IPC分类号： G11B5/33 , G11B5/39 , G11B5/58 , H01L43/08
CPC分类号： G11B5/58 , G11B5/39
摘要： A magnetoresistive (MR) sensor is center tapped to provide the difference signals for servo operation on data and sum signals for the data information. The center-tap of the MR sensor is made of a high resistivity material compared to the resistivity of the MR element itself such as tantalum, Nichrome and carbon. Processes which can be used to produce the high resistivity center-tap conductor include an insulator layer to define both the track width and the center-tap conductor and a sequence which first patterns the MR sensor and then masks to define the conductor regions.

5. 发明授权

US5079035A Method of making a magnetoresistive read transducer having hard magnetic bias 失效
标题翻译：制造具有硬磁偏置的磁阻读取传感器的方法
公开(公告)号：US5079035A
公开(公告)日：1992-01-07
申请号：US629503
申请日：1990-12-18
申请人： Mohamad T. Krounbi , Otto Voegeli , Po-Kang Wang
发明人： Mohamad T. Krounbi , Otto Voegeli , Po-Kang Wang
IPC分类号： G11B5/39
CPC分类号： G11B5/3903 , Y10T29/49044 , Y10T29/49046 , Y10T29/49067
摘要： A magnetoresistive (MR) read transducer having passive end regions separated by a central active region in which an MR layer is formed which extends over substantially only the central active region and in which a hard magnetic layer is formed in each end region. The hard magnetic layers form an abutting junction having electrical and magnetic continuity with the MR layer to produce a longitudinal bias in the MR sensor. The transducer is produced by a method in which the same stencil defines the extent of both the MR layer and the hard magnetic layers so that the abutting junctions are formed easily and reliably.
摘要翻译：磁阻（MR）读取传感器，其具有被中心有源区域分开的被动端区域，其中形成MR层，其基本上仅在中心有源区域上延伸，并且在每个端部区域中形成硬磁性层。硬磁性层形成与MR层具有电连接性和磁性连续性的邻接结，以在MR传感器中产生纵向偏置。传感器通过一种方法制造，其中相同的模版限定了MR层和硬磁性层的程度，使得邻接接合部容易且可靠地形成。

6. 发明授权

US5005096A Magnetoresistive read transducer having hard magnetic shunt bias 失效
标题翻译：具有硬磁分路偏置的磁阻读取传感器
公开(公告)号：US5005096A
公开(公告)日：1991-04-02
申请号：US287970
申请日：1988-12-21
申请人： Mohamad T. Krounbi , Po-Kang Wang , Otto Voegeli
发明人： Mohamad T. Krounbi , Po-Kang Wang , Otto Voegeli
IPC分类号： G11B5/39
CPC分类号： G11B5/3903 , G11B5/3932
摘要： A magnetoresistive (MR) read transducer comprising an MR layer having passive end regions separated by a central active region. A longitudinal bias is produced by a thin film of hard magnetic material in the end regions only, and the thin film of hard magnetic material is spaced from the MR layer by a nonmagnetic spacer layer so that a magnetostatic longitudinal bias is produced of a level to maintain the passive end regions of the MR layer in a stable state.

7. 发明授权

US5018037A Magnetoresistive read transducer having hard magnetic bias 失效
标题翻译：具有硬磁偏置的磁阻读取传感器
公开(公告)号：US5018037A
公开(公告)日：1991-05-21
申请号：US419246
申请日：1989-10-10
申请人： Mohamad T. Krounbi , Otto Voegeli , Po-Kang Wang
发明人： Mohamad T. Krounbi , Otto Voegeli , Po-Kang Wang
IPC分类号： G11B5/39
CPC分类号： G11B5/3903
摘要： A magnetoresistive (MR) read transducer having passive end regions separated by a central active region in which an MR layer is formed which extends over substantially only the central active region and in which a hard magnetic layer is formed in each end region. The hard magnetic layers form an abutting junction having electrical and magnetic continuity with the MR layer to produce a longitudinal bias in the MR sensor. The transducer is produced by a method in which the same stencil defines the extent of both the MR layer and the hard magnetic layers so that the abutting junctions are formed easily and reliably.

8. 发明授权

US5488528A Pole tip structure for thin film magnetic heads 失效
标题翻译：用于薄膜磁头的极尖结构
公开(公告)号：US5488528A
公开(公告)日：1996-01-30
申请号：US292630
申请日：1994-08-18
申请人： Mao-Min Chen , Kochan Ju , Neil L. Robertson , Po-Kang Wang
发明人： Mao-Min Chen , Kochan Ju , Neil L. Robertson , Po-Kang Wang
IPC分类号： G11B5/31 , G11B5/147
CPC分类号： G11B5/3163 , G11B5/3116 , G11B5/3183
摘要： A horizontal thin film magnetic head is provided which has well aligned pole tips. The head includes first and second seedlayers, the first and second seedlayers being located below a first pole tip and only the second seedlayer being located below the second pole tip. The first pole tip may be capped with a nonmagnetic material such as copper. A very narrow sidegap is employed between the first and second pole tips.
摘要翻译：提供了具有良好对准的极尖的水平薄膜磁头。头部包括第一和第二种子层，第一和第二种子层位于第一极端部下方，并且仅第二种子层位于第二极尖端下方。第一极尖可以用诸如铜的非磁性材料加盖。在第一和第二极尖之间使用非常窄的侧隙。

9. 发明授权

US06524491B1 Double plate-up process for fabrication of composite magnetoresistive shared poles 失效
标题翻译：用于制造复合磁阻共享极的双层平板工艺
公开(公告)号：US06524491B1
公开(公告)日：2003-02-25
申请号：US09298935
申请日：1999-04-26
申请人： Chun Liu , Cherng-Chyi Han , Kochan Ju , Po-Kang Wang , Jei-Wei Chang
发明人： Chun Liu , Cherng-Chyi Han , Kochan Ju , Po-Kang Wang , Jei-Wei Chang
IPC分类号： G11B5127
CPC分类号： G11B5/3967 , G11B5/3163 , Y10T29/49021 , Y10T29/49032
摘要： A method of manufacturing a magnetic recording head includes the following steps. Form a low magnetic moment, first magnetic shield layer over a substrate. Form a read gap layer with a magnetoresistive head over the first shield layer. Form a seed layer over the read gap layer covered with a frame mask with a width “F”. Form a PLM second shield layer over the seed layer and planarize the shield layer. Form a non-magnetic copper or dielectric spacer layer over the PLM second shield layer. Form a first HMM, lower pole layer over the non-magnetic spacer layer. Cover the first HMM, lower pole layer with a write gap layer. Form an write head mask composed of two parallel rows of resist with an outer width “W” over the seed layer. Between the two rows of resist of the write head mask is a trench having a width “N”. Then form an HMM, upper pole layer over the write gap layer aside from the write head mask. Outside of the write head mask remove the upper pole layer and shape the lower pole layer by an IBE process.
摘要翻译：制造磁记录头的方法包括以下步骤。在基板上形成低磁矩，第一磁屏蔽层。在第一屏蔽层上形成具有磁阻头的读取间隙层。在覆盖有宽度为“F”的框架掩模的读取间隙层上形成种子层。在种子层上形成PLM第二屏蔽层，并平整屏蔽层。在PLM第二屏蔽层上形成非磁性铜或电介质间隔层。在非磁性间隔层上形成第一个HMM，下极层。覆盖第一个HMM，具有写间隙层的下极层。在种子层上形成具有外部宽度“W”的两个平行的抗蚀剂行的写入头罩。写头掩模的两行抗蚀剂之间是宽度为“N”的沟槽。然后在写入头部掩模之外的写间隙层上形成HMM，上极层。在写头掩模之外，通过IBE工艺去除上极层并形成下极层。

10. 发明授权

US06393692B1 Method of manufacture of a composite shared pole design for magnetoresistive merged heads 失效
标题翻译：用于磁阻合并头的复合共轭极设计方法
公开(公告)号：US06393692B1
公开(公告)日：2002-05-28
申请号：US09283840
申请日：1999-04-01
申请人： Kochan Ju , Cherng-Chyi Han , Po-Kang Wang , Mao-Min Chen , Chun Liu , Jei-Wei Chang
发明人： Kochan Ju , Cherng-Chyi Han , Po-Kang Wang , Mao-Min Chen , Chun Liu , Jei-Wei Chang
IPC分类号： H04R3100
CPC分类号： G11B5/3912 , G11B5/3967 , Y10T29/49044 , Y10T29/49046
摘要： A merged read/write magnetic recording head comprises a low magnetic moment first magnetic shield layer over a substrate. A read gap layer with a magnetoresistive head is formed over the first shield layer. A shared pole comprises a low magnetic moment second magnetic shield layer plated on a sputtered seed PLM layer over the read gap layer, a non-magnetic layer plated over the PLM layer and a HMM lower pole layer plated over the second magnetic shield layer. A write gap layer is formed over the first high magnetic moment pole layer of the shared pole. An upper pole comprises a high magnetic moment pole layer over the write gap layer.
摘要翻译：合并的读/写磁记录头包括在衬底上的低磁矩第一磁屏蔽层。在第一屏蔽层上形成具有磁阻头的读取间隙层。共享极包括电镀在读取间隙层上的溅射种子PLM层上的低磁矩第二磁屏蔽层，镀在PLM层上的非磁性层和镀在第二磁屏蔽层上的HMM下极层。在共享极的第一高磁矩极点上形成写间隙层。上极包括写间隙层上的高磁矩极点层。

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