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公开(公告)号：US5530609A
公开(公告)日：1996-06-25
申请号：US251360
申请日：1994-05-31
IPC分类号： G11B5/00 , G11B5/02 , G11B5/09 , G11B5/187 , G11B5/31 , G11B5/39 , G11B5/70 , G11B5/706 , G11B5/74
CPC分类号： G11B5/3967 , G11B5/00 , G11B5/02 , G11B5/09 , G11B5/1878 , G11B5/3109 , G11B5/70 , G11B5/70678 , G11B5/74
摘要： In a method for magnetically recording and reproducing signals in and from a magnetic recording medium via a thin film magnetic head, the recording medium has a magnetic layer of up to 0.5 .mu.m thick containing hexagonal ferromagnetic particles on a non-magnetic substrate, and the magnetic head includes a recording head whose gap adjacent portion is formed of a soft magnetic material having a saturation magnetic flux density of at least 0.7 T and a reproducing MR head. In one form, the magnetic layer has a surface roughness (Ra) of up to 5 nm, and a coercivity (Hc) of at least 1,100 Oe and a squareness ratio (S) of at least 0.70. In another form, the magnetic layer contains hexagonal ferrite and has a squareness ratio (S.perp.) of at least 0.70, and the magnetic head produces a reproduction output which is subject to zero-crossing detection without passing through a differential circuit.
摘要翻译： 在通过薄膜磁头磁记录和再现磁记录介质中的信号的方法中，记录介质具有在非磁性基底上含有六角形铁磁颗粒的至多0.5μm厚的磁性层，并且 磁头包括记录头，其间隙相邻部分由具有至少0.7T的饱和磁通密度和再现MR磁头的软磁材料形成。 在一种形式中，磁性层的表面粗糙度（Ra）高达5nm，矫顽力（Hc）至少为1100Oe，矩形比（S）至少为0.70。 在另一种形式中，磁性层含有六角铁氧体，并且具有至少0.70的矩形比（S ORTHOGONAL），并且磁头产生经过过零检测而不通过差分电路的再现输出。
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公开(公告)号：US4918556A
公开(公告)日：1990-04-17
申请号：US233129
申请日：1988-08-17
申请人： Joichiro Ezaki , Kazumasa Fukuda , Masanori Sakai
发明人： Joichiro Ezaki , Kazumasa Fukuda , Masanori Sakai
CPC分类号： G11B5/6005 , G11B5/012 , G11B5/82
摘要： A magnetic recording and reproducing apparatus of a type wherein a magnetic disk having a magnetic recording layer formed on a rigid substrate is rotatable at a high speed and a magnetic head is disposed on the surface of the disk so that magnetic recording and reproduction are conducted by the head while rotating the disk at a high speed, wherein the surface roughness R.sub.max of the magnetic disk is adjusted at a level of at most 100 .ANG., and the flying height of the magnetic head at the initiation of flying is adjusted at a level within a range of from 0.01 to 0.04 .mu.m.
摘要翻译： 一种磁记录和再现装置，其中具有形成在刚性基板上的磁记录层的磁盘可高速旋转并且磁头设置在盘的表面上，使得磁记录和再现由 在高速旋转磁盘的同时，其中磁盘的表面粗糙度Rmax被调节到至多100安培的水平，并且在开始飞行时磁头的飞行高度被调整到 范围为0.01〜0.04μm。
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公开(公告)号：US5847899A
公开(公告)日：1998-12-08
申请号：US779339
申请日：1997-01-06
IPC分类号： G11B5/02 , G11B5/012 , G11B5/11 , G11B5/31 , G11B5/39 , G11B5/40 , G11B5/64 , G11B5/65 , G11B5/72 , G11B5/73 , G11B5/82 , G11B33/14
摘要： A thin film magnetic head includes a slider and thin film magnetic transducers, the slider supporting the thin film magnetic transducers. At least one of these thin film magnetic transducers is a magnetoresistive read element. The surface resistivity .rho. of the magnetic film of the magnetic disk is within the range of .rho..gtoreq.0.03.OMEGA..multidot.cm. Electric leak from the thin film magnetic head to the magnetic disk and electric discharge between these two are prevented.
摘要翻译： 薄膜磁头包括滑块和薄膜磁换能器，滑块支撑薄膜磁换能器。 这些薄膜磁换能器中的至少一个是磁阻读取元件。 磁盘的磁性膜的表面电阻率rho在r = 0.03 OMEGA×cm的范围内。 从薄膜磁头到磁盘的电泄漏和这两者之间的放电被防止。
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4.发明授权
公开(公告)号：US4939604A
公开(公告)日：1990-07-03
申请号：US327699
申请日：1989-03-23
CPC分类号： G11B5/7315 , G11B5/00 , G11B5/82
摘要： A magnetic head comprises a slider which holds recording/writing elements at its medium opposing surface constituting a lifting force generating part and the surface area of the medium opposing surface is at most 2 mm.sup.2.A magnetic recording and reproducing apparatus has such magnetic head which is disposed on a magnetic disk having a magnetic recording layer formed on a rigid substrate while the disk is rotated at a high speed so that magnetic recording and reproducing are conducted between the magnetic head and the magnetic disk, wherein the surface roughness R.sub.max of the magnetic disk is at most 100 .ANG..
摘要翻译： 磁头包括在构成提升力产生部件的介质相对表面处保持记录/写入元件的滑块，并且介质相对表面的表面积至多为2mm 2。 磁记录和再现装置具有这样的磁头，该磁头设置在具有形成在刚性基板上的磁记录层的磁盘上，同时盘以高速旋转，从而在磁头和磁头之间进行磁记录和再现 磁盘，其中磁盘的表面粗糙度Rmax为至多100安培。
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5.发明授权
公开(公告)号：US5072320A
公开(公告)日：1991-12-10
申请号：US316318
申请日：1989-02-27
申请人： Joichiro Ezaki , Kazumasa Fukuda , Masanori Sakai
发明人： Joichiro Ezaki , Kazumasa Fukuda , Masanori Sakai
CPC分类号： G11B5/7315 , G11B5/012 , G11B5/72 , G11B5/82
摘要： In a magnetic recording and reproducing apparatus of a type wherein a magnetic disk having a magnetic recording layer formed on a rigid substrate is rotated at a high speed and magnetic recording and reproduction are conducted by the magnetic head disposed on the surface of the disk, the magnetic recording and reproducing apparatus being characterized in that the magnetic recording layer constitutes an oxide layer, a nitride layer or an oxidized coating film at at least its surface layer, and the magnetic recording and reproducing are conducted by the magnetic head which is caused to be substantially in contact with the surface of magnetic disk at at least the innermost cylinder of the magnetic disk.
摘要翻译： 在其中具有形成在刚性基板上的磁记录层的磁盘以高速旋转并且通过设置在盘表面上的磁头进行磁记录和再现的类型的磁记录和再现装置中， 磁记录和再现装置的特征在于，磁记录层至少在其表面层上形成氧化物层，氮化物层或氧化涂膜，磁记录和再现由磁头进行 在磁盘的至少最内圆筒处基本上与磁盘表面接触。
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公开(公告)号：US5268799A
公开(公告)日：1993-12-07
申请号：US17997
申请日：1993-02-16
申请人： Joichiro Ezaki , Kazumasa Fukuda , Masanori Sakai
发明人： Joichiro Ezaki , Kazumasa Fukuda , Masanori Sakai
CPC分类号： G11B5/6005 , G11B5/012 , G11B5/54 , G11B5/58
摘要： In a magnetic recording and reproducing apparatus of a type wherein a magnetic disk having a magnetic recording layer formed on a rigid substrate is rotated at a high speed and magnetic recording and reproduction are conducted by the magnetic head disposed on the surface of the disk, the magnetic recording and reproducing apparatus being characterized in that the magnetic recording and reproducing are conducted by the magnetic head which is caused to fly from the magnetic disk at at least an area of the outermost cylinder of the magnetic disk and is caused to be substantially in contact with the surface of magnetic disk at at least an innermost cylinder of the magnetic disk.
摘要翻译： 在其中具有形成在刚性基板上的磁记录层的磁盘以高速旋转并且通过设置在盘表面上的磁头进行磁记录和再现的类型的磁记录和再现装置中， 磁记录和再现装置的特征在于磁记录和再现是由在磁盘的最外圆柱体的至少一个区域处从磁盘飞出并被使其基本接触的磁头来进行的 其中磁盘的表面在磁盘的至少最内圆柱上。
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公开(公告)号：US5991110A
公开(公告)日：1999-11-23
申请号：US159562
申请日：1998-09-24
CPC分类号： G11B5/09 , G11B5/1872 , G11B5/3106 , G11B5/3116 , G11B5/4886 , G11B5/6005
摘要： In the thin film magnetic transducer element, the front end portions of the upper pole piece and the lower pole piece are partially removed in such a manner that they align non parallel to the gap film on the opposite sides of the gap film. The condition .DELTA.P1>.DELTA.P2 is satisfied when the difference between the maximum pole length P1max and the minimum pole length P1min of the lower pole piece is .DELTA.P1 and the difference between the maximum pole length P2max and the minimum pole length P2min of the upper pole piece is .DELTA.P2. The sub pulse is reduced and so the partial response method can be employed.
摘要翻译： 在薄膜磁换能器元件中，上极片和下极片的前端部分被部分地移除，使得它们在间隙膜的相对侧上与间隙膜不平行地对准。 当下极点的最大极长度P1max和最小极长度P1min之间的差为DELTA P1，并且上极的最大极长度P2max与最小极长度P2min之间的差值满足条件DELTA P1> DELTA P2 极片是DELTA P2。 子脉冲减少，因此可以采用部分响应方法。
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8.发明授权Thin film magnetic head with an induction type magnetic transducer for suppressing sub-pulses 失效具有用于抑制子脉冲的感应式磁换能器的薄膜磁头
公开(公告)号：US5844749A
公开(公告)日：1998-12-01
申请号：US774317
申请日：1996-12-24
CPC分类号： G11B5/09 , G11B5/1872 , G11B5/3106 , G11B5/3116 , G11B5/4886 , G11B5/6005
摘要： In the thin film magnetic transducer element, the front end portions of the upper pole piece and the lower pole piece are partially removed in such a manner that they align non parallel to the gap film on he opposite sides of the gap film. The condition .DELTA.P1>.DELTA.P2 is satisfied when the difference between the maximum pole length P1max and the minimum pole length P1min of the lower pole piece is .DELTA.P1 and the difference between the maximum pole length P2max and the minimum pole length P2min of the upper pole piece is .DELTA.P2. The sub pulse is reduced and so the partial response method can be employed.
摘要翻译： 在薄膜磁换能器元件中，上极片和下极片的前端部分被部分地移除，使得它们与间隙膜的相对侧上的间隙膜不平行地对准。 当下极点的最大极长度P1max和最小极长度P1min之间的差为DELTA P1，并且上极的最大极长度P2max与最小极长度P2min之间的差值满足条件DELTA P1> DELTA P2 极片是DELTA P2。 子脉冲减少，因此可以采用部分响应方法。
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公开(公告)号：US5812349A
公开(公告)日：1998-09-22
申请号：US797626
申请日：1997-02-07
申请人： Jun Shouji , Masanori Sakai , Kazumasa Fukuda
发明人： Jun Shouji , Masanori Sakai , Kazumasa Fukuda
IPC分类号： G11B5/39 , G11B5/17 , G11B5/40 , G11B5/48 , G11B5/56 , G11B5/60 , H05K1/02 , H05K1/11 , G11B5/127
CPC分类号： G11B5/4853 , G11B5/40 , G11B5/48 , G11B5/39 , H05K1/0254 , H05K1/117
摘要： The present invention is directed to prevention of breakdown caused by electrostatic discharge in an MR element. An MR element constitutes a read element. A head support device 2 supports a magnetic head 1. A lead wire 3 is constituted with at least a pair of lead wires 31 and 32 and each of the pair of lead wires 31 and 32 is connected to the read element at one end. A terminal board 5 is provided with at least one pair of terminal conductors 52 and 53 on top of a hard substrate 51. The pair of terminal conductors 52 and 53 are provided with connecting areas 54 and 55 respectively on the same side, to which one end of which are connected the other ends of the lead wires 31 and 32 respectively. The pair of terminal conductors 52 and 53 are electrically shorted from each other by a shorting portion 56 at a rearward position which is away from the connecting areas 54 and 55 over a distance. The substrate 51 is provided with grooves or perforations 57 which facilitate the cutting operation between the shorting portion 56 and the connecting areas 54 and 55.
摘要翻译： 本发明涉及防止由MR元件中的静电放电引起的击穿。 MR元件构成读取元件。 头支撑装置2支撑磁头1.引线3由至少一对引线31和32构成，并且一对引线31和32中的每一个在一端连接到读取元件。 端子板5在硬质基板51的上面设置有至少一对端子导体52和53.一对端子导体52和53分别在同一侧设置有连接区域54和55，其中一个 其端部分别连接到引线31和32的另一端。 一对端子导体52和53通过远离连接区域54和55的后方位置处的短路部分56彼此电短路。 基板51设置有槽或穿孔57，其有利于短路部分56和连接区域54和55之间的切割操作。
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10.发明授权公开(公告)号：US07443633B2
公开(公告)日：2008-10-28
申请号：US11300277
申请日：2005-12-15
申请人： Katsumichi Tagami , Tatsuya Harada , Hiroki Matsukuma , Tetsuya Roppongi , Susumu Aoki , Kazumasa Fukuda , Naoto Matono
发明人： Katsumichi Tagami , Tatsuya Harada , Hiroki Matsukuma , Tetsuya Roppongi , Susumu Aoki , Kazumasa Fukuda , Naoto Matono
IPC分类号： G11B5/127
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/1872
摘要： A thin-film magnetic head with which an error rate is decreased due to a reduction of a jitter without significant decrease in write field, is provided. The head comprises at least one inductive write head element comprising: a main magnetic pole layer having an inner saturation magnetic flux density varying from both side end surfaces in a track-width direction and a leading end surface, toward a center portion in the track-width direction of a trailing end surface; an auxiliary magnetic pole layer; and at least one coil layer, a curvature width WC of a contour line of a write field adjacent to a trailing edge on an ABS side of the main magnetic pole layer satisfying the following expression: −0.15*WT≦WC
摘要翻译： 提供了一种薄膜磁头，其由于抖动的减小而不会在写入场中显着降低而误差率降低。 头包括至少一个感应写头元件，包括：主磁极层，具有从轨道宽度方向和前端表面的两个侧端面朝着轨道宽度方向的中心部分变化的内部饱和磁通密度， 后端面的宽度方向; 辅助磁极层; 以及至少一个线圈层，与主磁极层的ABS侧的后缘相邻的写入场的轮廓线的曲率宽度W C C满足以下表达式：-0.15 * 其中W T是轨道宽度，W C的单位和 W N是纳米。
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