公开(公告)号：US5272582A

公开(公告)日：1993-12-21

申请号：US766503

申请日：1991-09-27

申请人： Takuji Shibata ,  Kenichiro Tsunewaki ,  Mamoru Sasaki ,  Hideo Suyama ,  Norio Saito

发明人： Takuji Shibata ,  Kenichiro Tsunewaki ,  Mamoru Sasaki ,  Hideo Suyama ,  Norio Saito

IPC分类号： G11B5/39 ,  G11B5/40

CPC分类号： G11B5/3903 ,  G11B5/40

摘要： A magneto-resistance effect type magnetic head incorporates a grounded conductive layer, a second thin film magnetic core and an MR sensing part, the conductive layer being located near the thin film magnetic core, the layer and the core being electrically connected. The conductive layer is further connected electrically to an electrode of the MR sensing part, the electrode facing an air bearing surface. This setup protects the MR sensing part from static electricity destruction, thus providing a magneto-resistance effect type magnetic head of high reliability.

公开(公告)号：US5270893A

公开(公告)日：1993-12-14

申请号：US783166

申请日：1991-10-28

申请人： Mamoru Sasaki ,  Hideo Suyama ,  Takuji Shibata ,  Kenichiro Tsunewaki

发明人： Mamoru Sasaki ,  Hideo Suyama ,  Takuji Shibata ,  Kenichiro Tsunewaki

IPC分类号： G11B5/39 ,  C11B5/39 ,  C11B5/147

CPC分类号： G11B5/3903 ,  G11B5/3967

摘要： A magneto-resistance effect type thin film magnetic head which does not produce significant Barkhausen noises and has stabilized characteristics even where the track width is smaller than, for example, 10 .mu.m. The magnetic head comprises a base member, a lower layer thin film magnetic core and an upper layer thin film magnetic core layered on the base member in such a manner that a magnetic gap is formed between front ends thereof, the gap being open to an opposing face of the magnetic head which is in contact with or opposed to a magnetic record medium, and a magneto-resistance effect magnetic sensing section disposed in the magnetic gap between the lower and upper layer thin film magnetic cores. The front end of the lower layer thin film magnetic core which defines the magnetic gap has a width selected to be smaller than the width of the front end of the upper layer thin film magnetic core which defines the magnetic gap so as to define a track width of the magnetic gap.

摘要翻译： 磁阻效应型薄膜磁头不产生明显的巴克豪森噪声，并且即使在轨道宽度小于例如10μm的情况下也具有稳定的特性。 磁头包括基底部件，下层薄膜磁芯和层叠在基底部件上的上层薄膜磁芯，使得在其前端之间形成磁隙，间隙开放到相对的位置 与磁记录介质接触或相对的磁头的表面，以及设置在下层和上层薄膜磁芯之间的磁隙中的磁阻效应磁感应部分。 限定磁隙的下层薄膜磁芯的前端的宽度被选择为小于限定磁隙的上层薄膜磁芯的前端的宽度，以便限定磁道宽度 的磁隙。

公开(公告)号：US4896235A

公开(公告)日：1990-01-23

申请号：US298299

申请日：1989-01-17

申请人： Hiroshi Takino ,  Shigeyoshi Imakoshi, deceased ,  Nobuhiro Terada ,  Norio Saito ,  Hideo Suyama ,  Kenichiro Tsunewaki

发明人： Hiroshi Takino ,  Shigeyoshi Imakoshi, deceased ,  Nobuhiro Terada ,  Norio Saito ,  Hideo Suyama ,  Kenichiro Tsunewaki

IPC分类号： G11B5/31 ,  G11B5/39

CPC分类号： G11B5/3925 ,  G11B5/3903 ,  G11B5/3941 ,  G11B5/3954 ,  G11B5/3961 ,  G11B5/3964 ,  G11B5/398 ,  G11B5/399 ,  G11B5/3156

摘要： A MR magnetic head with a sensing element which comprises a plurality of superposed magnetic layers which have a magnetoresistance effect in at least one and a nonmagnetic intermediate layer sandwiched between the magnetic layers, and a sensing current is fed so as to flow in the sensing element in the same direction as a signal magnetic field which is applied to the element. Each of the magnetic layers is formed so as to have an easy axis of magnetization which is substantially perpendicular to the signal magnetic field or to have an isotropic magnetic characteristic in the magnetic film plane, which eliminates Barkhausen noise.

摘要翻译： 一种具有感测元件的MR磁头，其包括在夹在所述磁性层之间的至少一个磁阻效应和非磁性中间层中的多个重叠磁性层，并且馈送感测电流以在所述感测元件 在与施加到元件的信号磁场相同的方向上。 每个磁性层形成为具有基本上垂直于信号磁场的易磁化轴或者在磁性膜平面中具有各向同性磁特性，这消除了巴克豪森噪声。