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61. 发明授权

US06493183B1 Thermally-assisted magnetic recording system with head having resistive heater in write gap 有权
标题翻译：带磁头的热辅助磁记录系统具有写入间隙中的电阻加热器
公开(公告)号：US06493183B1
公开(公告)日：2002-12-10
申请号：US09608848
申请日：2000-06-29
申请人： Prakash Kasiraj , Neil Leslie Robertson , Hemantha Kumar Wickramasinghe
发明人： Prakash Kasiraj , Neil Leslie Robertson , Hemantha Kumar Wickramasinghe
IPC分类号： G11B5147
CPC分类号： G11B5/3903 , G11B5/127 , G11B13/045 , G11B2005/0005 , G11B2005/0021
摘要： A thermally-assisted magnetic recording disk drive records data by heating a small region of the magnetic layer on the disk to near or above its Curie temperature while a write field is applied by a thin film inductive write head. The thin film inductive write head includes an electrically resistive heater located in the write gap between the pole tips of the write head. The resistive heater is sandwiched between first and second spacer layers that are located between the pole tips of the write head. In a current-perpendicular-to-the plane (CPP) embodiment, the spacer layers are electrically conductive and the pole tips serve as the electrical leads to provide electrical current in a direction generally perpendicular to the layer of resistive heater material. In a current-in-the plane (CIP) embodiment, the spacer layers are formed of insulating material and electrical leads are formed as portions of a film between the spacer layers and in contact with each side of the resistive heater. The width of the resistive heater is less than the width of the pole tips. Thus since only the region of the magnetic layer on the disk that is heated by the resistive heater can be written by the pole tips of the write head, the data track width on the disk is defined by the width of the resistive heater, not by the geometry of write head pole tips.
摘要翻译：热辅助磁记录磁盘驱动器通过在薄膜感应写头施加写入场的同时将盘上的磁性层的小区域加热到靠近或高于其居里温度来记录数据。薄膜感应写头包括位于写入头的极尖之间的写入间隙中的电阻加热器。电阻加热器被夹在位于写入头的极尖之间的第一和第二间隔层之间。在电流垂直于平面（CPP）实施例中，间隔层是导电的，并且极尖用作电引线以在大致垂直于电阻加热器材料层的方向上提供电流。在电流平面（CIP）实施例中，间隔层由绝缘材料形成，并且电引线形成为间隔层之间的膜的一部分并且与电阻加热器的每一侧接触。电阻加热器的宽度小于极尖的宽度。因此，由于只有由电阻加热器加热的磁盘上的磁性层的区域可以由写入头的极尖写入，所以盘上的数据磁道宽度由电阻加热器的宽度定义，而不是由写磁头尖端的几何形状。

62. 发明授权

US6081409A TiC MR-head magnetic shield dummy shield spark gap 失效
标题翻译： TiC MR磁头磁屏蔽虚拟屏蔽火花隙
公开(公告)号：US6081409A
公开(公告)日：2000-06-27
申请号：US959406
申请日：1997-10-28
申请人： Timothy Scott Hughbanks , Neil Leslie Robertson , Steven Howard Voldman , Albert John Wallash
发明人： Timothy Scott Hughbanks , Neil Leslie Robertson , Steven Howard Voldman , Albert John Wallash
IPC分类号： G11B5/10 , G11B5/11 , G11B5/31 , G11B5/39 , G11B5/40 , G11B5/596 , G11B5/127
CPC分类号： G11B5/3903 , G11B5/11 , G11B5/3912 , G11B5/40 , G11B5/59683 , G11B5/3103 , Y10T29/49032
摘要： A magneto-resistive read head having a "parasitic shield" provides an alternative path for currents associated with sparkovers, thus preventing such currents from damaging the read head. The parasitic shield is provided in close proximity to a conventional magnetic shield. The electrical potential of parasitic shield is held essentially equal to the electrical potential of the sensor element. If charges accumulate on the conventional shield, current will flow to the parasitic shield at a lower potential than would be required for current to flow between the conventional shield and the sensor element. Alternatively, conductive spark gap devices are electrically coupled to sensor element leads and to each magnetic shield. Each spark gap device is brought within very close proximity of the substrate to provide an alternative path for charge that builds up between the sensor element and the substrate to be discharged. The ends of the spark gaps that are brought into close proximity of the substrate are preferably configured with high electric field density inducing structures which reduce the voltage required to cause a sparkover between the spark gap device and the substrate.
摘要翻译：具有“寄生屏蔽”的磁阻式读取头提供了与火花放电相关的电流的替代路径，从而防止这种电流损坏读取头。寄生屏蔽件靠近传统的磁屏蔽设置。寄生屏蔽的电位基本上等于传感器元件的电位。如果电容积累在常规屏蔽上，则电流将以比传统屏蔽和传感器元件之间的电流流动所需的电位更低的电流流向寄生屏蔽。或者，导电火花隙装置电耦合到传感器元件引线和每个磁屏蔽。每个火花隙装置被带到非常靠近基板的位置，以提供在传感器元件和待排出的基板之间建立的用于充电的替代路径。靠近基板的火花隙的端部优选地配置有高电场密度诱导结构，其降低在火花隙装置和基板之间引起火花放电所需的电压。

63. 发明授权

US5802700A Method of making a planarized thin film magnetic write head with submicron trackwidth 失效
标题翻译：制造具有亚微米轨道宽度的平面化薄膜磁写头的方法
公开(公告)号：US5802700A
公开(公告)日：1998-09-08
申请号：US469728
申请日：1995-06-06
申请人： Mao-Min Chen , Kochan Ju , Neil Leslie Robertson , Hugo Alberto Emilio Santini
发明人： Mao-Min Chen , Kochan Ju , Neil Leslie Robertson , Hugo Alberto Emilio Santini
IPC分类号： G11B5/187 , G11B5/23 , G11B5/235 , G11B5/31 , G11B5/147
CPC分类号： G11B5/3103 , G11B5/3116 , G11B5/3133 , G11B5/3146 , G11B5/1872 , G11B5/232 , G11B5/235 , Y10T29/49044 , Y10T29/49046 , Y10T29/49052
摘要： A method is provided for making a thin film magnetic write head with a notch structure located on top of one of two pole layers. The notch structure is a generally U-shaped thin film layer which forms a trench inside the U for the containment of one or more pole tip layers in the pole tip region of the head. The notch structure has front surfaces at the tips of the legs of the U which lie in a plane that forms a part of the air bearing surface. The thickness of the notch layer is substantially equal to the thickness or thicknesses of the one or more pole tip layers located in the trench. A method of manufacturing the write head includes forming a very thin photoresist layer for defining the notch structure. The notch structure is well-defined which in turn allows the one or more pole tip layers to be well-defined with a very narrow trackwidth in the trench.
摘要翻译：提供了一种用于制造具有位于两个极层之一的顶部上的凹口结构的薄膜磁性写入头的方法。凹口结构是大致U形的薄膜层，其在U形内部形成沟槽，用于容纳头部的磁极尖端区域中的一个或多个极尖端层。凹口结构在位于形成空气轴承表面的一部分的平面中的U形腿的顶端具有前表面。切口层的厚度基本上等于位于沟槽中的一个或多个极尖端层的厚度或厚度。一种制造写入头的方法包括形成非常薄的光致抗蚀剂层以限定凹口结构。凹口结构是明确的，这又允许一个或多个极尖端层在沟槽中具有很窄的轨道宽度。

64. 发明授权

US5759428A Method of laser cutting a metal line on an MR head 失效
标题翻译：激光切割MR头上的金属线的方法
公开(公告)号：US5759428A
公开(公告)日：1998-06-02
申请号：US616395
申请日：1996-03-15
申请人： Hamid Balamane , Chie Ching Poon , Neil Leslie Robertson , Andrew Ching Tam
发明人： Hamid Balamane , Chie Ching Poon , Neil Leslie Robertson , Andrew Ching Tam
IPC分类号： B23K26/40 , B23K26/08
CPC分类号： B23K26/40 , B23K26/362 , B23K2203/26 , B23K2203/50 , Y10T29/49032
摘要： A thin film conductive line is formed between MR pads on an MR head for protecting an MR sensor from electrostatic discharge (ESD) during assembly steps between row level fabrication of the head and prior to merge of a head stack assembly with a disk stack assembly. The conductive line may have a reduced thickness delete pad. A laser beam having a fluence sufficient to sever the conductive line at the delete pad but insufficient to damage or cause debris from structure underlying or surrounding the conductive line is used to sever the conductive line. The method traverses minimum energy, short laser pulses at a high pulse rate across the width of the conductive line so that each laser pulse melts conductive material across the line, the melted material withdrawing from the melted area and being heaped on top of adjacent portions of the delete pad by surface tension and the melted material cooling to room temperature before the next pulse so that there is no cumulative heating and therefore no damage to or debris from the underlying structure. The conductive material of the line is incrementally plowed to each side of a severed path by successive overlapping laser pulses so that when the series of laser pulses has traversed the width of the delete pad the conductive line has been severed.
摘要翻译：在MR头上的MR焊盘之间形成薄膜导电线，用于在磁头堆叠组件与磁盘堆叠组件合并之前的组装步骤期间保护MR传感器免受静电放电（ESD）的影响。导线可以具有减小的厚度删除焊盘。激光束具有足够的能量来切断在删除焊盘处的导线，但是不足以损坏或者导致来自导电线下面或周围的结构的碎屑被切断导线。该方法在导线的宽度上以高脉冲速度穿过最小能量，短激光脉冲，使得每个激光脉冲在导线上熔化导电材料，熔化的材料从熔化区域中排出并堆叠在相邻部分的顶部删除垫由表面张力和熔化的材料在下一个脉冲之前冷却至室温，使得没有累积加热，因此不会从底层结构损坏或碎屑。线的导电材料通过连续重叠的激光脉冲逐渐地被切割到切断路径的每一侧，使得当一系列激光脉冲已经穿过删除焊盘的宽度时，导线已被切断。

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