公开(公告)号：USRE38585E1

公开(公告)日：2004-09-14

申请号：US10200508

申请日：2002-07-23

申请人： Masanori Tanabe

发明人： Masanori Tanabe

IPC分类号： G11B531

CPC分类号： G11B5/313 ,  G11B5/012 ,  G11B5/3109 ,  G11B5/3116

摘要： A thin film magnetic head which can suppress magnetic saturation at opposite ends of width of a narrow track width to reduce the amount of recording side-fringing onto a recording medium and which can assure a necessary recording magnetic field satisfactorily. Also a magnetic disk apparatus using the head. A second magnetic yoke has a magnetic gap depth over which the spacing of a magnetic gap keeps substantially equal toward a rear portion of the second magnetic yoke, starting at the tip of a second magnetic pole and the spacing between a first magnetic yoke and the second magnetic yoke is increased toward the rear portion, starting at a position corresponding to the magnetic gap depth. The second magnetic pole of the second magnetic yoke has in the track width direction a width for recording a signal on a track width of the recording medium. The width keeps constant over a predetermined length toward the rear portion, starting at the second magnetic pole tip and spreads monotonically toward the rear, starting at a position corresponding to the predetermined length. The predetermined length terminating in the spread start position of the width of the second magnetic yoke is set to be shorter than the magnetic gap depth.

公开(公告)号：US06785098B2

公开(公告)日：2004-08-31

申请号：US10294213

申请日：2002-11-13

申请人： Wenchein Hsiao ,  Quan-chiu Harry Lam ,  Edward Hin Pong Lee

发明人： Wenchein Hsiao ,  Quan-chiu Harry Lam ,  Edward Hin Pong Lee

IPC分类号： G11B531

CPC分类号： G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/2452 ,  G11B5/3116 ,  G11B5/312 ,  G11B5/3967

摘要： A write head has a variable throat height wherein the throat height is dependent upon the frequency of operation of the write head. At high frequency operation the throat height is small and at low frequency operation the throat height is large. The write head writes hard into a circular track of a rotating magnetic disk at all frequencies but not overly hard at low frequencies thereby avoiding excessive erase bands and adjacent track interference (ATI) on each side of the track being written.

摘要翻译： 写头具有可变的喉部高度，其中喉部高度取决于写入头的操作频率。 在高频操作下，喉部高度小，在低频操作时喉部高度较大。 写入头在所有频率上硬写入旋转磁盘的圆形轨道，但在低频下不会过硬，从而避免写入轨道的每一侧上的过多擦除带和相邻轨道干扰（ATI）。

公开(公告)号：US06525902B1

公开(公告)日：2003-02-25

申请号：US09416234

申请日：1999-10-12

申请人： Shouxiang Hu ,  James K. Price ,  Sunita B. Gangopadhyay

发明人： Shouxiang Hu ,  James K. Price ,  Sunita B. Gangopadhyay

IPC分类号： G11B531

CPC分类号： G11B5/313 ,  G11B5/3163 ,  G11B5/3967

摘要： A method of forming a thin film magnetic recording head includes forming a shared pole having a first pole tip, a first top pole segment having a second pole tip, and a write gap layer between the first pole tip and the second pole tip. A write coil can be formed after the first top pole segment and then a second top pole segment can be formed. The second top pole segment includes a connection to the first top pole segment and a connection to the shared pole. A thin film magnetic head includes a shared pole having a first pole tip, a first top pole segment having a second pole tip, a write gap layer positioned between the first pole tip and the second pole tip, a second top pole segment connected to the first top pole segment and to the shared pole, and a write coil positioned between the second top pole segment and the shared pole.

摘要翻译： 一种形成薄膜磁记录头的方法包括：形成具有第一极尖的共享极，具有第二极尖的第一顶极段和在第一极尖和第二极尖之间的写间隙层。 可以在第一顶极段之后形成写入线圈，然后可以形成第二顶极段。 第二顶极段包括到第一顶极段的连接和到共享极的连接。 薄膜磁头包括具有第一极尖的共享极，具有第二极尖的第一顶极段，位于第一极尖和第二极尖之间的写间隙层，连接到第二极尖的第二顶极段 第一顶极段和共享极，以及位于第二顶极段和共享极之间的写入线圈。

公开(公告)号：US06490127B1

公开(公告)日：2002-12-03

申请号：US09544332

申请日：2000-04-06

申请人： Yoshitaka Sasaki

发明人： Yoshitaka Sasaki

IPC分类号： G11B531

CPC分类号： G11B5/313 ,  G11B5/3163

摘要： A thin film magnetic head capable of obtaining a sufficient overwrite characteristic and a method of manufacturing the same are provided. An insulating film pattern is disposed in a recess formed in a bottom pole. The front end of the insulating film pattern is positioned within a region where the front end part of a top pole tip extends. The insulating film pattern has the function of shielding propagation of magnetic flux from the top pole tip disposed on the insulating film pattern to the bottom pole formed under the insulating film pattern. Consequently, due to the existence of the insulating film pattern, the propagation of the magnetic flux from the top pole tip to the bottom pole is suppressed, so that sufficient magnetic flux is supplied to the front end part. Therefore, the excellent overwrite characteristic can be assured.

摘要翻译： 提供一种能够获得足够的重写特性的薄膜磁头及其制造方法。 绝缘膜图案设置在形成在底极中的凹部中。 绝缘膜图案的前端位于顶极尖端的前端部延伸的区域内。 绝缘膜图案具有屏蔽从设置在绝缘膜图案上的顶极端子到形成在绝缘膜图案下方的底极的磁通的传播的功能。 因此，由于存在绝缘膜图案，所以抑制了磁极从顶极尖端到底极的传播，从而向前端部供给充分的磁通量。 因此，可以确保优良的重写特性。

公开(公告)号：US06473265B1

公开(公告)日：2002-10-29

申请号：US09572664

申请日：2000-05-16

申请人： Yuming Zhou ,  Feng Wang ,  Jim Giusti ,  Juan Fernandez-de-Castro

发明人： Yuming Zhou ,  Feng Wang ,  Jim Giusti ,  Juan Fernandez-de-Castro

IPC分类号： G11B531

CPC分类号： G11B5/313 ,  G11B5/127 ,  G11B5/3116 ,  G11B5/40 ,  G11B33/14

摘要： A magnetic recording head has an air bearing surface and a magnetic core having a height and a width. The magnetic core is formed in part of a plurality of narrow slices having a plurality of insulating channels interspersed therein along the width of the magnetic core. Each of the plurality of narrow slices extends essentially along the height of the magnetic core.

摘要翻译： 磁记录头具有空气轴承表面和具有高度和宽度的磁芯。 磁芯形成在多个窄片的一部分中，该多个窄片具有沿着磁芯的宽度分布在其中的多个绝缘通道。 多个窄片中的每一个基本上沿着磁芯的高度延伸。

公开(公告)号：US06329211B1

公开(公告)日：2001-12-11

申请号：US09405005

申请日：1999-09-27

申请人： Koichi Terunuma ,  Tetsuya Mino ,  Katsuya Kanakubo ,  Osamu Matsuda

发明人： Koichi Terunuma ,  Tetsuya Mino ,  Katsuya Kanakubo ,  Osamu Matsuda

IPC分类号： G11B531

CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  Y10T29/49046

摘要： A first magnetic film to constitute a first yoke part and a first pole part is formed in a given pattern on a substrate, and a write gap film is formed on the part corresponding to the first pole portion of the first magnetic film. Then, a second magnetic film having a second pole portion and a second yoke part is formed on the write gap film by a photolithography so that the second pole portion can have a width of 1.5-2.5 &mgr;m. Thereafter, the sides of the second pole portion are etched by an ion beam etching method to narrow its width, and the write gap film is removed by using, as a mask, the second pole portion to expose the first magnetic film. Subsequently, the exposed first magnetic film is partially removed to form the first pole portion and thereby a thin film magnetic head having a pole portion with a track width of not more than 1 &mgr;m beyond the limit of the photolithography is produced.

摘要翻译： 构成第一磁轭部的第一磁性膜和第一磁极部以给定的图案形成在基板上，并且在与第一磁性膜的第一极部相对应的部分上形成写入间隙膜。 然后，通过光刻法在写间隙膜上形成具有第二极部分和第二磁轭部分的第二磁性膜，使得第二极部分可以具有1.5-2.5μm的宽度。 此后，通过离子束蚀刻方法蚀刻第二极部分的侧面以使其宽度变窄，并且通过使用第二极部来暴露第一磁性膜来去除写入间隙膜作为掩模。 随后，暴露的第一磁性膜被部分去除以形成第一极部，由此产生具有超过光刻极限的磁道宽度不超过1μm的磁极部分的薄膜磁头。

公开(公告)号：US06327116B1

公开(公告)日：2001-12-04

申请号：US09337603

申请日：1999-06-21

申请人： Toshinori Watanabe ,  Kiyoshi Sato

发明人： Toshinori Watanabe ,  Kiyoshi Sato

IPC分类号： G11B531

CPC分类号： G11B5/313 ,  G11B5/3103 ,  G11B5/3116 ,  G11B5/3967 ,  Y10T29/49032

摘要： A thin-film magnetic head has a magnetic lower core layer and a magnetic upper core layer formed on the lower core layer with a nonmagnetic gap layer provided therebetween, and the lower core layer and the upper core layer are opposed on an opposing surface which faces a recording medium. The upper core layer includes a leading region extending from the opposing surface towards the rear portion away from the recording medium and having a track width TW, a middle region extending from the leading region towards the rear portion and having a width larger than the track width TW, and a trailing region extending from the middle region towards the rear portion and having an increasing width. The edges at the boundary between the leading region and the middle region are rounded.

摘要翻译： 薄膜磁头具有形成在下芯层上的磁性下芯层和磁性上芯层，其间设置有非磁性间隙层，下芯层和上芯层在面对的相对表面上相对 记录介质。 上芯层包括从相对表面朝向远离记录介质的后部延伸的引导区域，并且具有轨道宽度TW，从引导区域延伸到后部并且具有大于轨道宽度的宽度的中间区域 TW，以及从中间区域向后部延伸并且具有增加的宽度的尾部区域。 引导区域和中间区域之间的边界处的边缘是圆形的。

公开(公告)号：US06324035B2

公开(公告)日：2001-11-27

申请号：US09836481

申请日：2001-04-18

申请人： Yoshihiro Shiroishi

发明人： Yoshihiro Shiroishi

IPC分类号： G11B531

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/09 ,  G11B5/313 ,  G11B5/3909 ,  G11B5/3967 ,  G11B5/484 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/3996

摘要： A magnetic recording and reading device having a magnetic head assembly in which a magnetic head is mounted on a suspension, an R/W-IC having a line width of not more than 0.35 &mgr;m and a magnetic disk medium having a magnetic recording layer formed on a substrate. The magnetic head assembly has an inductance of not more than 65 nH and has a magnetic path with a length of not more than 35 &mgr;m, wherein a part of the magnetic path is provided with a magnetic film or a multi-layer film consisting of a magnetic film and a non magnetic layer. The magnetic film and the multi-layer film have a resistivity of more than 50 &mgr;&OHgr;cm.

摘要翻译： 一种具有磁头组件的磁记录和读取装置，其中磁头安装在悬架上，具有不大于0.35μm的线宽的R / W-IC和形成有磁记录层的磁盘介质 底物。 磁头组件具有不大于65nH的电感并且具有不大于35μm的长度的磁路，其中一部分磁路设置有磁性膜或多层膜，所述多层膜由 磁性膜和非磁性层。 磁性膜和多层膜的电阻率大于50μΩEGcm。

公开(公告)号：US06262867B1

公开(公告)日：2001-07-17

申请号：US09626743

申请日：2000-07-26

申请人： Masaaki Sano ,  Yoshiaki Kita ,  Shun-ichi Narumi ,  Takashi Kawabe ,  Moriaki Fuyama ,  Hisashi Takano ,  Hisano Yamamoto ,  Kenzo Masuda

发明人： Masaaki Sano ,  Yoshiaki Kita ,  Shun-ichi Narumi ,  Takashi Kawabe ,  Moriaki Fuyama ,  Hisashi Takano ,  Hisano Yamamoto ,  Kenzo Masuda

IPC分类号： G11B531

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3109 ,  G11B5/3163 ,  G11B5/3967 ,  G11B2005/3996 ,  H01F41/26

摘要： A thin film magnetic head and a disk storage system having a magnetic disk and the thin film magnetic head provided on a floating type slider. The thin film magnetic head has an upper magnetic core and a lower magnetic core, wherein the upper magnetic core and the lower magnetic core are made of an electroplated thin film having sufficient average crystal grain size. The upper magnetic core is made of a Ni—Fe alloy having Ni of 38 to 60 wt % and Fe of 40 to 62 wt %, and the crystal grain size is smaller than 500 Å.

摘要翻译： 一种薄膜磁头和具有磁盘的磁盘存储系统和设置在浮动滑块上的薄膜磁头。 薄膜磁头具有上磁芯和下磁芯，其中上磁芯和下磁芯由具有足够的平均晶粒尺寸的电镀薄膜制成。 上磁芯由Ni为38〜60重量％，Fe为40〜62重量％，晶粒尺寸小于500的Ni-Fe合金构成。

公开(公告)号：US06191917B1

公开(公告)日：2001-02-20

申请号：US09150803

申请日：1998-09-10

申请人： Richard H. Dee ,  Bradley N. Engel

发明人： Richard H. Dee ,  Bradley N. Engel

IPC分类号： G11B531

CPC分类号： G11B5/3116 ,  G11B5/00813 ,  G11B20/10018 ,  G11B2220/93

摘要： A thin film write head allowing substantially the same amplitude of input current to be used for writing both data transitions and equalization pulses onto a magnetic tape is described. Data transitions occur at a frequency no greater than a data frequency. Each equalization pulse is a signal written at an equalization frequency much greater than the data frequency. The thin film write head includes a top pole, a bottom pole, and a conductive coil between the top and bottom poles. The top pole, bottom pole, and conductive coil form an electromagnet for writing the write-equalized digital data stream onto the magnetic tape by converting an input current through the conductive coil into a head field. Conversion of the input current at the data frequency results in substantially the same head field amplitude as conversion of the input current at the equalization frequency. This may be achieved by increasing the gap depth to cause saturation at the data frequency.

摘要翻译： 描述了允许将数据转换和均衡脉冲写入磁带的输入电流基本相同的幅度的薄膜写入头。 数据转换发生在不大于数据频率的频率上。 每个均衡脉冲是以比数据频率大得多的均衡频率写入的信号。 薄膜写入头包括顶极，底极和位于顶极和底极之间的导电线圈。 顶极，底极和导电线圈形成电磁体，用于通过将通过导电线圈的输入电流转换为磁头场来将写入均衡的数字数据流写入磁带。 在数据频率下的输入电流的转换导致与均衡频率下的输入电流的转换大致相同的磁头幅度。 这可以通过增加间隙深度来实现，以在数据频率处引起饱和。