公开(公告)号：US08223462B2

公开(公告)日：2012-07-17

申请号：US12129991

申请日：2008-05-30

申请人： Hardayal Singh Gill ,  Wen-Chien David Hsiao ,  David John Seagle

发明人： Hardayal Singh Gill ,  Wen-Chien David Hsiao ,  David John Seagle

IPC分类号： G11B5/33

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3929 ,  G11B5/40 ,  G11B2005/3996

摘要： A magnetic head having an electrostatic shunt structure for preventing damage to the magnetic head during manufacture. A portion of the shunt structure is removed during manufacture, however another portion remains. In order to prevent the remaining portions of the shunt structure from picking up stray magnetic and electromagnetic fields, an electromagnetic shield, is provided between the remaining portions of the shunt structure and the substrate.

摘要翻译： 具有静电分流结构的磁头，用于在制造期间防止磁头的损坏。 分流结构的一部分在制造过程中被去除，然而另一部分保留。 为了防止分流结构的剩余部分拾取杂散磁场和电磁场，在分流结构的剩余部分和基板之间设置电磁屏蔽。

公开(公告)号：US08116032B2

公开(公告)日：2012-02-14

申请号：US12419281

申请日：2009-04-06

申请人： John Thomas Contreras ,  Manfred Ernst Schabes ,  David John Seagle

发明人： John Thomas Contreras ,  Manfred Ernst Schabes ,  David John Seagle

IPC分类号： G11B5/17

CPC分类号： G11B5/3123 ,  G11B5/1278 ,  G11B2005/001

摘要： A perpendicular magnetic recording system has a write head having a main coil (the write coil) and main pole (the write pole) that directs write flux in a direction perpendicular to the recording layer in the magnetic recording medium, and an auxiliary coil and auxiliary pole that injects magnetic flux into the write pole at an angle to the primary or perpendicular axis of the write pole. The additional flux from the auxiliary pole, which is injected non-parallel to the primary magnetization of the write pole, exerts a relatively large torque on the magnetization of the write pole, thereby facilitating magnetization reversal of the write pole. Electrical circuitry is connected to the main coil and the auxiliary coil to generate the auxiliary flux simultaneous with the switching of the magnetization of the write pole.

摘要翻译： 垂直磁记录系统具有写磁头，其具有主磁盘（写线圈）和主磁极（写磁极），该磁头在与磁记录介质中的记录层垂直的方向上引导写磁通，辅助线圈和辅助 磁极以与写入极的主轴线或垂直轴成一定角度将磁通量注入到写入极。 来自辅助极的不平行于写入磁极的一次磁化的附加磁通对写入磁极的磁化施加相对较大的转矩，从而促进写入极的磁化反转。 电路连接到主线圈和辅助线圈，以与写入极的磁化转换同时产生辅助通量。

公开(公告)号：US07707707B2

公开(公告)日：2010-05-04

申请号：US11612539

申请日：2006-12-19

申请人： David John Seagle

发明人： David John Seagle

IPC分类号： G11B5/23

CPC分类号： G11B5/3163 ,  G11B5/11 ,  G11B5/3173 ,  G11B5/3903 ,  G11B5/6094 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49046

摘要： A method of temporarily protecting an electrically sensitive component from damage due to electrostatic discharge includes defining a shunt having first and second leads electrically connected in parallel with the component and separated by a gap. A portion of a shield layer is deposited to form the shunt between the first and second leads to span the gap therebetween and form a shunted assembly. The shunted assembly and component are lapped to form the ABS at the location of the component, a sacrificial carbon overcoat is deposited on the ABS, and additional processing is performed on the shunted assembly. A portion of the shunted assembly, the shunt, and portions of the sacrificial carbon overcoat are then removed to form an electrical open for an unshunted assembly having ABS features comprising an air bearing cavity/deep gap at a former location of the shunted assembly.

摘要翻译： 暂时保护电敏元件免于由于静电放电而损坏的方法包括限定具有与元件并联电连接并由间隔隔开的第一和第二引线的分路。 屏蔽层的一部分被沉积以在第一和第二引线之间形成分流，以跨越其间的间隙并形成分流的组件。 分流的组件和部件被研磨以在部件的位置处形成ABS，牺牲碳外涂层沉积在ABS上，并且在分流的组件上执行额外的处理。 分流组件的一部分，分流器和牺牲碳外涂层的一部分然后被去除以形成用于未分配组件的电气开口，其具有包括在分流组件的原始位置处的空气轴承腔/深间隙的ABS特征。

公开(公告)号：US07630177B2

公开(公告)日：2009-12-08

申请号：US11355045

申请日：2006-02-14

申请人： Robert Stanley Beach ,  David Eugene Heim ,  Vladimir Nikitin ,  David John Seagle

发明人： Robert Stanley Beach ,  David Eugene Heim ,  Vladimir Nikitin ,  David John Seagle

IPC分类号： G11B5/39

CPC分类号： G11B5/398 ,  G01R33/09 ,  G11B5/399

摘要： In a tunnel magnetoresistive (TMR) device, free sublayers are separated by an intermediate spacer layer that serves to ensure a uniform circumferential magnetization in the free stack, counterbalancing orange-peel coupling by antiferromagnetic exchange coupling. Thus, a CPP MR device may have a seed stack, a pinned stack on the seed stack, and a tunnel barrier on the pinned stack. A free stack can be on the tunnel barrier, and the free stack can include structure for promoting uniform circumferential magnetization in the free stack.

摘要翻译： 在隧道磁阻（TMR）器件中，自由子层由中间间隔层隔开，中间间隔层用于确保自由堆叠中的均匀圆周磁化，通过反铁磁交换耦合平衡橙皮耦合。 因此，CPP MR装置可以具有种子堆叠，种子堆叠上的钉扎堆叠以及钉扎堆叠上的隧道势垒。 自由堆叠可以在隧道屏障上，并且自由堆叠可以包括用于在自由堆叠中促进均匀周向磁化的结构。

公开(公告)号：US20090168259A1

公开(公告)日：2009-07-02

申请号：US11967478

申请日：2007-12-31

申请人： ARLEY CLEVELAND MARLEY ,  David John Seagle

发明人： ARLEY CLEVELAND MARLEY ,  David John Seagle

IPC分类号： G11B5/33

CPC分类号： G11B5/455 ,  G11B5/3173 ,  G11B5/3906

摘要： Embodiments of the invention provide methods, systems and apparatus for testing electronic components, and more specifically for testing magnetoresistive heads. A pair of top shield pads and a pair of bottom shield pads may be formed in a kerf region of a wafer on which magnetoresistive heads are formed. The top shield pads, bottom shield pads, and a magnetoresistive head may form a circuit that may be coupled with a testing circuit to exchange test signals configured to test the magnetic head. The pair of bottom shield pads may provide balanced impedance to substrate that nullifies the effects of broadband noise.

摘要翻译： 本发明的实施例提供了用于测试电子部件的方法，系统和装置，更具体地，用于测试磁阻磁头。 可以在其上形成有磁阻头的晶片的切口区域中形成一对顶部屏蔽焊盘和一对底部屏蔽焊盘。 顶部屏蔽焊盘，底部屏蔽焊盘和磁阻头可以形成可以与测试电路耦合的电路，以交换配置成测试磁头的测试信号。 一对底部屏蔽焊盘可以为衬底提供平衡的阻抗，从而消除宽带噪声的影响。

公开(公告)号：US20080144229A1

公开(公告)日：2008-06-19

申请号：US11638974

申请日：2006-12-14

申请人： Kuok San Ho ,  Edward Hin Pong Lee ,  David John Seagle ,  Ching Hwa Tsang

发明人： Kuok San Ho ,  Edward Hin Pong Lee ,  David John Seagle ,  Ching Hwa Tsang

IPC分类号： G11B5/33

CPC分类号： G11B5/3929 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3912 ,  G11B5/398

摘要： An improved magnetic head for a hard disk drive including a lead overlaid read head in which the read width and read gap are reduced. The read width, which corresponds to the distance between the inner ends of the overlaid electrical leads, is reduced by the fabrication of a thin read width insulation member prior to the fabrication of the overlaid electrical leads. The read gap is reduced by fabricating the overlaid electrical leads from a magnetic, electrically conductive material such as NiFe, whereby the overlaid electrical leads also function as a magnetic shield. The read gap, which is the distance between the first and second magnetic shields is thus reduced as compared to the prior art by the thickness of the electrical leads and the thickness of the prior art second insulation layer formed between the electrical leads and the second magnetic shield.

摘要翻译： 一种用于硬盘驱动器的改进磁头，包括读出宽度和读取间隙减小的引线重叠读头。 通过在制造覆盖的电引线之前制造薄的读宽度绝缘部件，减小对应于重叠的电引线的内端之间的距离的读宽度。 通过从诸如NiFe的磁性导电材料制造覆盖的电引线来减小读取间隙，由此重叠的电引线也用作磁屏蔽。 因此，与现有技术相比，通过电引线的厚度和形成在电引线和第二磁屏蔽之间的现有技术的第二绝缘层的厚度相比，第一和第二磁屏蔽之间的距离减小了读取间隙 屏蔽。

公开(公告)号：US20080100970A1

公开(公告)日：2008-05-01

申请号：US11554469

申请日：2006-10-30

申请人： Satoru Araki ,  John Contreras ,  Klaas Berend Klaassen ,  Ramona Marie Patterson ,  David John Seagle ,  Howard Gordon Zolla

发明人： Satoru Araki ,  John Contreras ,  Klaas Berend Klaassen ,  Ramona Marie Patterson ,  David John Seagle ,  Howard Gordon Zolla

IPC分类号： G11B5/33

CPC分类号： G11B5/1278

摘要： A current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) read head structure has the MR read head located between first and second shields (S1, S2) on a substrate with a shunt resistor R1 connecting S1 to the substrate and a shunt resistor R2 connecting S2 to the substrate, with R1 and R2 being approximately equal. Because R1 and R2 are close enough in value there is no significant interference pickup in the low frequency region. The shunt resistors can be formed from high-resistivity metal nitrides or cermets. The spacing between the substrate and S1 may be selected to make the capacitance between S1 and the substrate approximately equal to the capacitance between S2 and the substrate to substantially reduce interference pickup in the high frequency region. Equalization conductors (EC1, EC2) may be connected to the substrate and spaced from S2 and S1, respectively, by electrically insulating material to create additional capacitances with values selected to substantially equalize the total parasitic capacitance on S2 with the total parasitic capacitance on S1.

摘要翻译： 电流垂直于平面（CPP）磁阻（MR）读头结构具有位于衬底上的第一和第二屏蔽（S1，S2）之间的MR读取头，其中分流电阻器R 1连接S 1 并将R 2和R 2近似相等的分流电阻R 2与S 2连接。 由于R 1和R 2的值足够接近，所以在低频区域中没有显着的干扰拾取。 分流电阻可由高电阻金属氮化物或金属陶瓷形成。 可以选择衬底和S 1之间的间隔，以使S 1和衬底之间的电容大致等于S 2与衬底之间的电容，以显着降低高频区域中的干扰拾取。 均衡导体（EC 1，EC 2）可以分别连接到衬底，并且通过电绝缘材料分别与S 2和S 1隔开，以产生额外的电容，其值被选择为使S 2上的总寄生电容基本上相等于总共 S 1上的寄生电容。

公开(公告)号：US6038110A

公开(公告)日：2000-03-14

申请号：US762826

申请日：1996-12-06

申请人： Joseph Adam Aboaf ,  Thomas Beaulieu ,  Vincent Noel Kahwaty, deceased ,  Mohamad Towfik Krounbi ,  David John Seagle

发明人： Joseph Adam Aboaf ,  Thomas Beaulieu ,  Vincent Noel Kahwaty, deceased ,  Mohamad Towfik Krounbi ,  David John Seagle

IPC分类号： G11B5/008 ,  G11B5/31 ,  G11B5/127 ,  G11B5/147

CPC分类号： G11B5/3109 ,  G11B5/00813 ,  G11B5/3146 ,  G11B5/3163 ,  Y10T29/49044

摘要： A thin-film magnetic head includes a substrate having first and second magnetic layers disposed above the substrate and formed as a laminated sequence of magnetic sub-layers. The first and second magnetic layers have corresponding first ends representing a pole tip region of the head, corresponding second ends representing a back gap region of the head, and corresponding intermediate portions representing an intermediate region of the head between the pole tip region and the back gap region. The first and second magnetic layers are joined together in physical contact at the back gap region and are spaced from one another at the pole tip region and at the intermediate region. A nonmagnetic gap layer is disposed between the first and second magnetic layers at the pole tip region. A magnetic coil structure is disposed between the first and second magnetic layers at the intermediate region. The second magnetic layer has a sloped region wherein the second magnetic layer slopes away from the first magnetic layer behind the pole tip region to form a space for the magnetic coil structure. The sloped region of the second magnetic layer may have less magnetic permeability than other portions of the second magnetic layer. A third magnetic layer is thus disposed on the second magnetic layer and extends from the back gap region to cover at least the sloped region of the second magnetic layer.

摘要翻译： 薄膜磁头包括具有设置在基板上方的第一和第二磁性层并形成为磁性子层的层叠序列的基板。 第一和第二磁性层具有相应的第一端表示头部的极尖区域，对应的第二端表示头部的后部间隙区域，以及相应的中间部分，表示头部区域和背部之间的中间区域 间隙区域。 第一和第二磁性层在后隙区域处物理接触地接合在一起，并且在极尖区域和中间区域处彼此间隔开。 非磁性间隙层设置在极尖区域的第一和第二磁性层之间。 磁性线圈结构设置在中间区域的第一和第二磁性层之间。 所述第二磁性层具有倾斜区域，其中所述第二磁性层在所述极尖区域的后方倾斜离开所述第一磁性层，以形成用于所述磁性线圈结构的空间。 第二磁性层的倾斜区域的磁导率可以比第二磁性层的其它部分低。 因此，第三磁性层被布置在第二磁性层上，并且从后间隙区域延伸至至少覆盖第二磁性层的倾斜区域。

公开(公告)号：US5764446A

公开(公告)日：1998-06-09

申请号：US641561

申请日：1996-05-01

申请人： David John Seagle

发明人： David John Seagle

IPC分类号： G11B5/31 ,  G11B5/008 ,  G11B5/39 ,  G11B5/40 ,  G11B5/48 ,  G11B15/64 ,  G11B5/30 ,  G11B5/29

CPC分类号： G11B5/3903 ,  G11B5/3967 ,  G11B5/4893 ,  G11B15/64 ,  G11B5/00813 ,  G11B5/40

摘要： A magnetic head structure including a magnetoresistive (MR) head and an inductive head for data storage devices such as tape drives. A method of fabricating a magnetic head utilizing semiconductor-type processing techniques is described that produces an inductive head gap having a substantially flat planar structure throughout in length which, in one embodiment, has a length of 150 microns and a height of one micron. The structure includes a first and second shield, and an MR layer formed therebetween that includes an MR sensor adjacent to the air bearing surface (ABS), leads connected on opposite sides of the MR sensor, and isolated segments situated between the leads and extending all the way to the ABS. A trench (i.e. gap) is formed between the leads and the segments. Preferably, the leads and the segments are deposited simultaneously, and the insulating gap is formed subsequently by photoresist and masking techniques. By isolating the segments electrically, the leads are isolated from short circuits appearing across the ABS, thereby reducing noise, enhancing reliability and providing better performance, while at the same time providing a substantially flat structure upon which to form the inductive head and thereby provide a substantially uniform inductive head gap. Embodiments include merged heads and piggyback heads.

摘要翻译： 一种磁头结构，包括磁阻（MR）磁头和用于数据存储装置如磁带驱动器的感应磁头。 描述了利用半导体类型处理技术制造磁头的方法，其产生的感应头间隙具有整个长度上的基本平坦的平面结构，在一个实施例中，其具有150微米的长度和1微米的高度。 该结构包括第一和第二屏蔽，以及在其间形成的MR层，其包括邻近空气轴承表面（ABS）的MR传感器，连接在MR传感器的相对侧上的引线以及位于引线之间并且全部延伸的隔离段 到ABS的方式。 在引线和片段之间形成沟槽（即间隙）。 优选地，引线和段被同时沉积，并且随后通过光致抗蚀剂和掩蔽技术形成绝缘间隙。 通过电隔离这些段，引线与跨越ABS的短路隔离，从而降低噪声，增强可靠性并提供更好的性能，同时提供基本平坦的结构，在其上形成感应头，从而提供 感应头间隙大致均匀。 实施例包括合并头和背负头。

公开(公告)号：US08089295B2

公开(公告)日：2012-01-03

申请号：US11967478

申请日：2007-12-31

申请人： Arley Cleveland Marley ,  David John Seagle

发明人： Arley Cleveland Marley ,  David John Seagle

IPC分类号： G01R31/02 ,  G11B5/127

CPC分类号： G11B5/455 ,  G11B5/3173 ,  G11B5/3906

摘要： Embodiments of the invention provide methods, systems and apparatus for testing electronic components, and more specifically for testing magnetoresistive heads. A pair of top shield pads and a pair of bottom shield pads may be formed in a kerf region of a wafer on which magnetoresistive heads are formed. The top shield pads, bottom shield pads, and a magnetoresistive head may form a circuit that may be coupled with a testing circuit to exchange test signals configured to test the magnetic head. The pair of bottom shield pads may provide balanced impedance to substrate that nullifies the effects of broadband noise.

摘要翻译： 本发明的实施例提供了用于测试电子部件的方法，系统和装置，更具体地，用于测试磁阻磁头。 可以在其上形成有磁阻头的晶片的切口区域中形成一对顶部屏蔽焊盘和一对底部屏蔽焊盘。 顶部屏蔽焊盘，底部屏蔽焊盘和磁阻头可以形成可以与测试电路耦合的电路，以交换配置成测试磁头的测试信号。 一对底部屏蔽焊盘可以为衬底提供平衡的阻抗，从而消除宽带噪声的影响。