公开(公告)号：US5172057A

公开(公告)日：1992-12-15

申请号：US613727

申请日：1990-11-30

申请人： Kuniaki Yoshimura ,  Takehiko Sagara ,  Hideo Murata

发明人： Kuniaki Yoshimura ,  Takehiko Sagara ,  Hideo Murata

IPC分类号： G01D5/12 ,  G01D5/14 ,  G01D5/16 ,  G01D5/245 ,  G01D5/249

CPC分类号： G01D5/145 ,  G01D5/2497

摘要： The magnetic encoder of the present invention includes a magnetic signal generating drum having plural magnetic pole lines respectively having different magnetization pitches. Magnetic signals are repeatedly generated from the plural magnetic pole lines. A magnetic sensor is provided which includes plural magnetic resistant effect elements for converting the respective magnetic signals generated from the plural magnetic pole lines into electric signals. The plural magnetic resistant effect elements respectively confront the plural magnetic pole lines and output electric signals of different pulse numbers in accordance with incident magnetic signals. The magnetic signals generated from the plural magnetic poles lines and incident on the magnetic resistant effect elements are less that an anisotropic magnetic field level of the respective magnetic resistant effect elements. As such, respective values and waveform shapes of signals output by each of the magnetic resistant effect elements is substantially the same.

摘要翻译： PCT No.PCT / JP90 / 00481 Sec。 371日期1990年11月30日 102（e）1990年11月30日日期PCT提交1990年4月10日PCT公布。 公开号WO90 / 12290 1990年10月18日。本发明的磁编码器包括具有分别具有不同磁化间距的多个磁极线的磁信号发生鼓。 从多个磁极线重复产生磁信号。 提供一种磁传感器，其包括用于将从多个磁极线产生的各个磁信号转换为电信号的多个磁阻效应元件。 多个磁阻效应元件分别面对多个磁极线并根据入射的磁信号输出不同脉冲数的电信号。 从多个磁极线产生并入射到耐磁效应元件上的磁信号小于各磁阻效应元件的各向异性磁场电平。 因此，由各磁阻效应元件输出的信号的各个值和波形形状基本相同。

公开(公告)号：US6072670A

公开(公告)日：2000-06-06

申请号：US41000

申请日：1998-03-19

申请人： Shinji Furuichi ,  Kuniaki Yoshimura

发明人： Shinji Furuichi ,  Kuniaki Yoshimura

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/147

CPC分类号： G11B5/3106 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3143 ,  G11B5/3163 ,  G11B5/3967

摘要： A thin film magnetic head has, on the rear side of one and the other magnetic poles 2, 5 in the shape of a film formed on a substrate, a coil layer around a connection between both the magnetic poles, and on the end side of one and the other magnetic poles, a magnetic gap layer 3 between both the magnetic poles, and a non-magnetic track width regulating member 8 is provided on the opposite sides of both the magnetic poles 2, 5 and the magnetic gap layer 3, wherein the end of each track width regulating member 8 is positioned between the ends close to and distant from the magnetic gap layer in the other magnetic pole, and the other magnetic pole 5 formed by plating covers partially at least a portion of the end of each track width regulating member, or the end surfaces close to and distant from the magnetic gap layer in the other magnetic pole 5 are not parallel to each other. Thus, both the magnetic poles 2, 5 in the gap portion are formed to have the uniform and small width with high precision, resulting in prevention of side-fringing.

摘要翻译： 薄膜磁头在形成在基板上的膜形状的一个和另一个磁极2,5的后侧上具有围绕两个磁极之间的连接的线圈层和在两个磁极之间的连接的端侧 一个和另一个磁极，两个磁极之间的磁隙层3和非磁道宽度调节构件8设置在两个磁极2,5和磁隙层3的相对侧上，其中 每个轨道宽度限制构件8的端部位于靠近并远离另一磁极中的磁隙层的端部之间，并且通过电镀形成的另一个磁极5部分地覆盖每个轨道的端部的至少一部分 宽度调节构件或者靠近并远离另一个磁极5中的磁隙层的端面彼此不平行。 因此，间隙部分中的两个磁极2,5都被形成为具有高精度的均匀且小的宽度，从而防止侧边缘化。

公开(公告)号：US5581429A

公开(公告)日：1996-12-03

申请号：US418110

申请日：1995-04-06

申请人： Shinji Furuichi ,  Kuniaki Yoshimura

发明人： Shinji Furuichi ,  Kuniaki Yoshimura

IPC分类号： G11B5/31 ,  G11B5/147

CPC分类号： G11B5/3146

摘要： The thin-film magnetic head comprises a gap layer, coil layer, insulating layer, and top magnetic pole layer stacked in sequence on the bottom magnetic pole layer, and a magnetic gap formed at the end position of the gap layer. The top magnetic pole layer is magnetically joined to the bottom magnetic pole layer over the whole width at the opposite position of the magnetic gap. All these enable an easy production of the thin-film magnetic head keeping the magnetic resistance of the magnetic circuit small and having a structure appropriate to a higher recording density.

摘要翻译： 薄膜磁头包括依次堆叠在底部磁极层上的间隙层，线圈层，绝缘层和顶部磁极层以及形成在间隙层的端部位置处的磁隙。 顶部磁极层在磁隙的相对位置处在整个宽度上磁接合到底部磁极层。 所有这些使得能够容易地生产保持磁路的磁阻小并且具有适合于更高记录密度的结构的薄膜磁头。

公开(公告)号：US06202289B1

公开(公告)日：2001-03-20

申请号：US09330992

申请日：1999-06-14

申请人： Kuniaki Yoshimura ,  Shinji Furuichi ,  Takeo Sasaki

发明人： Kuniaki Yoshimura ,  Shinji Furuichi ,  Takeo Sasaki

IPC分类号： G11B5127

CPC分类号： G11B5/3106 ,  Y10T29/49041 ,  Y10T29/49046

摘要： A manufacturing method that can manufacture small thin film magnetic head sliders with high dimensional accuracy and high manufacturing yield is disclosed. This manufacturing method uses 5 inch- or 6 inch-dia. substrate wafers having a thickness sufficient to keep wafer bending to a minimum level even after thin film magnetic head elements have been formed on it. On the front side surface of the substrate wafer formed are thin film magnetic elements. After a protective layer covered on the surface of the thin film magnetic head elements has been ground and/or lapped, the back side surface of the substrate wafer is ground and/or lapped to a thickness equal to a desired slider length.

摘要翻译： 公开了一种能够制造高尺寸精度和高制造成品率的小型薄膜磁头滑块的制造方法。 该制造方法使用5英寸或6英寸直径。 即使在其上形成薄膜磁头元件之后，具有足以将晶片弯曲保持在最小水平的厚度的衬底晶片。 在形成的基板晶片的正面上是薄膜磁性元件。 在覆盖在薄膜磁头元件表面上的保护层已经被研磨和/或研磨之后，将衬底晶片的背侧表面研磨和/或研磨成等于期望的滑块长度的厚度。

公开(公告)号：US6101068A

公开(公告)日：2000-08-08

申请号：US157958

申请日：1998-09-22

申请人： Shigekazu Ohtomo ,  Shuji Sudo ,  Yuji Ueda ,  Kuniaki Yoshimura ,  Hideji Takahashi

发明人： Shigekazu Ohtomo ,  Shuji Sudo ,  Yuji Ueda ,  Kuniaki Yoshimura ,  Hideji Takahashi

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/21

CPC分类号： G11B5/3967 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3153 ,  G11B5/3103

摘要： A thin-film magnetic head includes an MR element serving as a reproducing element and a recording induction coil. The MR element is disposed between a lower magnetic pole and an intermediate magnetic pole. The recording induction coil is disposed between the intermediate magnetic pole and an upper magnetic pole. At least a portion of the upper magnetic pole in the vicinity of a recording gap is formed of a material having a high saturation magnetic flux density of 1.4 T or higher. The intermediate magnetic pole is formed of a material having a high resistivity of 80 .mu..OMEGA..multidot.cm or higher.

摘要翻译： 薄膜磁头包括用作再现元件的MR元件和记录感应线圈。 MR元件设置在下磁极和中间磁极之间。 记录感应线圈设置在中间磁极和上磁极之间。 记录间隙附近的上磁极的至少一部分由具有1.4T以上的高饱和磁通密度的材料形成。 中间磁极由具有80μm欧姆/厘米或更高的高电阻率的材料形成。

公开(公告)号：US5302893A

公开(公告)日：1994-04-12

申请号：US741623

申请日：1991-08-07

申请人： Kuniaki Yoshimura

发明人： Kuniaki Yoshimura

IPC分类号： G01B7/00 ,  G01D5/12 ,  G01D5/245 ,  G01P3/487 ,  G11B5/706 ,  G01R33/00 ,  G01B7/14

CPC分类号： G01P3/487 ,  G01D5/12 ,  G11B5/70678 ,  Y10S428/90

摘要： A coated magnetic recording member for use in a magnetic encoder includes a non-magnetic substrate and a magnetic recording medium carried on the non-magnetic substrate. The magnetic recording medium of a magnetic film formed of a magnetic coating material which contains magnetic barium-ferrite powder. A magnetic encoder includes the magnetic recording member on which magnetic recording is conducted, and a magnetic sensor disposed in opposed relation to the magnetic recording medium.

摘要翻译： 用于磁编码器的涂覆磁记录元件包括非磁性基片和非磁性基底上承载的磁记录介质。 由含有磁性钡铁氧体粉末的磁性涂层材料形成的磁性膜的磁记录介质。 磁性编码器包括磁记录元件，磁记录元件与磁记录介质相对设置。