公开(公告)号：US07054113B1

公开(公告)日：2006-05-30

申请号：US09999605

申请日：2001-10-25

申请人： David John Seagle ,  Mark David Thomas ,  Sandra Sankar ,  Pei Zou ,  Carlos Corona

发明人： David John Seagle ,  Mark David Thomas ,  Sandra Sankar ,  Pei Zou ,  Carlos Corona

IPC分类号： G11B5/33

CPC分类号： G11B5/3143 ,  G11B5/3967 ,  G11B5/4853

摘要： A method for manufacturing a reader/writer is provided having a substrate with an undercoat formed thereon. A first shield is formed over a portion of the undercoat and a pair of reader leads is formed over the first shield and undercoat. A read sensor is formed between the reader leads and a first pole/second shield is formed over the reader leads. A mid coat is formed over the undercoat and the reader leads. A second pole is formed over and in contact with the mid coat. A lead is formed over the second pole. A pedestal is formed over the reader lead and an overcoat is formed over the second pole and the lead and around the pedestal. A pad is then formed over the pedestal.

摘要翻译： 提供一种用于制造读/写器的方法，其具有在其上形成有底涂层的基底。 在底涂层的一部分上形成第一屏蔽，并且在第一屏蔽层和底涂层上形成一对读取器引线。 在读取器引线之间形成读取传感器，并且在读取器引线上形成第一极/第二屏蔽。 在底漆和读取器引线上形成中间涂层。 第二个杆形成在中层上方并与之接触。 在第二极上形成引线。 在读取器引线上形成基座，并且在第二极和引线上并围绕基座形成外涂层。 然后在基座上形成垫。

公开(公告)号：US6158108A

公开(公告)日：2000-12-12

申请号：US281730

申请日：1999-03-30

申请人： David John Seagle

发明人： David John Seagle

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/42

CPC分类号： G11B5/3967 ,  G11B5/3106 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A magnetic head is provided that has an extremely small first shield layer and first and second leads of a read head that extend from a magnetoresistive (MR) sensor to first and second pads without any vias therebetween. This is accomplished by patterning the first shield layer into its final shape before the first gap layer and subsequent layers are formed. An alumina mask with a recess at the ABS of the size of the first shield layer is formed followed by forming the first shield layer in the recess. A very thin first gap layer and an optional supplemental first gap layer are then formed, the supplemental first gap layer insulating any potential exposure of the first shield layer at its junction with the alumina layer. After constructing the MR sensor, first and second leads for the MR sensor are constructed from the MR sensor to sites of the first and second pads. Each of these leads may comprise a single thin film or a first thin film which is connected to the MR and extends past a boundary of the first shield layer and a second thin film which overlays the first film and extends from a location slightly spaced from the MR sensor to the first and second pad sites. With this arrangement the leads for the read head extend from the MR sensor to the pad sites without any vias thereby eliminating processing steps. Further, since the size of the shield is not dictated by the size of the initial leads the first shield layer can be much smaller to promote a more robust head.

摘要翻译： 提供了一种磁头，其具有非常小的第一屏蔽层和从磁阻（MR）传感器延伸到第一和第二焊盘而在其间没有任何通孔的读头的第一和第二引线。 这是通过在形成第一间隙层和随后的层之前将第一屏蔽层图案化成其最终形状来实现的。 在第一屏蔽层的尺寸的ABS处形成具有凹部的氧化铝掩模，随后在凹部中形成第一屏蔽层。 然后形成非常薄的第一间隙层和任选的补充的第一间隙层，补充的第一间隙层在与氧化铝层的连接处绝缘第一屏蔽层的任何潜在的曝光。 在构建MR传感器之后，MR传感器的第一和第二引线由MR传感器构成到第一和第二焊盘的位置。 这些引线中的每一个可以包括单个薄膜或第一薄膜，其连接到MR并延伸经过第一屏蔽层的边界，并且覆盖第一薄膜并从与第一薄膜稍微间隔开的位置延伸的第二薄膜 MR传感器到第一和第二焊盘位置。 通过这种布置，读头的引线从MR传感器延伸到焊盘位置，而没有任何通孔，从而消除了处理步骤。 此外，由于屏蔽的尺寸不受初始引线的尺寸的限制，所以第一屏蔽层可以小得多以促进更坚固的头部。

公开(公告)号：US06004473A

公开(公告)日：1999-12-21

申请号：US876157

申请日：1997-06-13

申请人： Richard Hsiao ,  Cherngye Hwang ,  David John Seagle

发明人： Richard Hsiao ,  Cherngye Hwang ,  David John Seagle

IPC分类号： G11B5/31 ,  G11B5/39 ,  B44C1/22

CPC分类号： G11B5/3967 ,  G11B5/313 ,  G11B5/3163 ,  Y10T29/49052

摘要： A method is provided wherein first and second sacrificial layers of a write element in a merged magnetic head are provided on top of a coil material layer, wherein the first sacrificial layer serves as a mask for shaping the coil material layer into a write coil, and the second sacrificial layer is employed for patterning the desired shape of the first sacrificial layer. The second sacrificial layer is shaped by a first reactive ion etching (RIE) step through a spiral opening in a photoresist layer. The result is a spiral-shaped second sacrificial layer that is employed as a mask for a second RIE to etch the first sacrificial layer through a spiral opening in the second sacrificial layer. The remaining spiral-shaped first sacrificial layer is then employed as a mask for ion milling the coil material layer through a spiral opening in the first sacrificial layer resulting in a write coil with a submicron pitch and sloping edges, which together increase a width of the base of the coil for increased current inducting capability.

摘要翻译： 提供了一种方法，其中合并磁头中的写入元件的第一和第二牺牲层设置在线圈材料层的顶部，其中第一牺牲层用作将线圈材料层成形为写入线圈的掩模，以及 使用第二牺牲层来图案化第一牺牲层的期望形状。 通过在光致抗蚀剂层中的螺旋形开口的第一反应离子蚀刻（RIE）步骤来成形第二牺牲层。 结果是螺旋形的第二牺牲层，其用作第二RIE的掩模，以通过第二牺牲层中的螺旋开口蚀刻第一牺牲层。 然后将剩余的螺旋状第一牺牲层用作通过第一牺牲层中的螺旋开口对线圈材料层进行离子铣削的掩模，得到具有亚微米间距和倾斜边缘的写入线圈，这些线圈一起增加了 线圈的基极，用于增加电流感应能力。

公开(公告)号：US5875080A

公开(公告)日：1999-02-23

申请号：US924224

申请日：1997-09-05

申请人： David John Seagle

发明人： David John Seagle

IPC分类号： G11B5/127 ,  G11B5/17 ,  G11B5/31 ,  G11B5/39

CPC分类号： G11B5/3967 ,  G11B5/127 ,  G11B5/17 ,  G11B5/31 ,  G11B5/3123 ,  G11B5/313 ,  G11B5/3163 ,  Y10T29/49062

摘要： A low inductance magnetic write head is provided with first and second pole piece layers that have first ends separated by a write gap layer and second ends connected together at a back gap. An insulation stack is provided which is sandwiched between the first and second pole piece layers. A write coil layer and a second coil layer are provided wherein each coil layer has inner and outer ends. The coil layers wind in the same direction from their inner ends to their outer ends. Each of the coil layers has first and second layer portions. The first layer portion of the write coil layer is embedded in the insulation stack. The second pole piece layer is sandwiched between the first portion of the write coil and a non-magnetic layer and the first non-magnetic layer is sandwiched between the second pole piece layer and the first portion of the second coil layer. The inner ends of the coil layers are electrically connected and the outer ends of the coil layers are electrically connected to a write current source so that when the write current source is introduced write fluxes from the coil layers are in opposition. The first layer portion of the second coil layer has a turn density that is less than a turn density of the first layer portion of the write coil layer.

摘要翻译： 低电感磁写头设置有第一和第二极片层，第一和第二极片层具有由写间隙层分开的第一端和在后隙连接在一起的第二端。 提供了一个夹在第一和第二极片层之间的绝缘叠层。 提供写入线圈层和第二线圈层，其中每个线圈层具有内端和外端。 线圈层从它们的内端到其外端沿同一方向卷绕。 每个线圈层具有第一和第二层部分。 写入线圈层的第一层部分嵌入绝缘堆叠中。 第二极片层夹在写入线圈的第一部分和非磁性层之间，第一非磁性层被夹在第二极片层和第二线圈层的第一部分之间。 线圈层的内端电连接，并且线圈层的外端电连接到写电流源，使得当引入写入电流源时，来自线圈层的写入通量相反。 第二线圈层的第一层部分的转向密度小于写入线圈层的第一层部分的转动密度。

公开(公告)号：US5710510A

公开(公告)日：1998-01-20

申请号：US692685

申请日：1996-08-06

申请人： David John Seagle ,  Joseph Francis Smyth

发明人： David John Seagle ,  Joseph Francis Smyth

IPC分类号： G01N27/72 ,  G01R33/12 ,  G11B5/31 ,  G11B5/127 ,  H01F7/06

CPC分类号： G11B5/3166 ,  G01N27/72 ,  G01R33/1223 ,  G11B5/3113 ,  G11B5/3116 ,  Y10T29/49036

摘要： A monitoring apparatus is provided for determining permeabilities of a vacuum-deposited second pole piece of a magnetic head at the wafer level by providing wafer-mounted monitors which have layers formed by the same masking and deposition steps employed in making the magnetic heads so that the layers of the monitors are replicated layers, except for a shaping layer on top of a replicated second pole piece of some of the monitors. Each monitor is a transformer wherein each of a primary winding and a secondary winding comprises essentially a replicated magnetic head. The first and second pole pieces of the replicated magnetic heads are joined so as to magnetically couple the primary and secondary windings that constitute the transformer. The replicated shaping layer is omitted in part to expose a portion of one of the replicated second pole pieces of a monitor, such as the front slope, the back slope or the yoke portion of the replicated second pole piece which corresponds to the front slope, the back slope or yoke respectively of the magnetic head. When a current is conducted through the replicated coils of the monitor a voltage reading can be taken to indicate the permeability of the exposed portion of the replicated second pole piece of the monitor.

摘要翻译： 提供一种监测装置，用于通过提供晶片安装的监视器来确定晶片级的磁头的真空沉积的第二极靴的磁导率，所述晶片安装的监视器具有通过在制造磁头中使用相同的掩蔽和沉积步骤形成的层， 监视器的层是复制层，除了在一些监视器的复制的第二极片之上的成形层之外。 每个监视器是变压器，其中初级绕组和次级绕组中的每一个基本上包括复制的磁头。 复制磁头的第一和第二极片接合，以磁耦合构成变压器的初级和次级绕组。 复制的成形层部分省略以暴露监视器的一个复制的第二极片的一部分，例如对应于前斜面的复制的第二极片的前斜面，后斜面或轭部， 分别是磁头的后斜面或轭。 当通过监视器的复制线圈传导电流时，可以采取电压读数来指示监视器的复制的第二极片的暴露部分的磁导率。

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。