公开(公告)号：US06788489B1

公开(公告)日：2004-09-07

申请号：US09567473

申请日：2000-05-09

申请人： Thomas Young Chang ,  Louis Joseph Serrano

发明人： Thomas Young Chang ,  Louis Joseph Serrano

IPC分类号： G11B5596

CPC分类号： G11B21/083 ,  G11B5/5547

摘要： A direct access storage device (DASD) employs head-specific off-track read capability (OTRC) in data access operations. A method of operation of the DASD involves providing within the DASD a rotating data storage medium and one or more read heads positionable for interaction with the data storage medium. The OTRC particular to each read head is determined and then applied in accessing data from the data storage medium. One manner of applying the OTRC to access data is to use the OTRC in scheduling random queued seeks. The OTRC for a head is referenced within buffer memory and applied to determine which target data can be accessed most quickly. The seeks are scheduled accordingly. A single table with a nominal seek time can be used for all heads, with a custom adder being added for each particular head. The OTRC can also be applied to alter the seek algorithm. That is, a given seek operation can be conducted more aggressively where the head involved has more favorable OTRC and less aggressively where a head with a less favorable OTRC is involved.

摘要翻译： 直接访问存储设备（DASD）在数据访问操作中使用头专用的远程读取能力（OTRC）。 DASD的操作方法涉及在DASD内提供旋转数据存储介质和可定位用于与数据存储介质交互的一个或多个读取头。 确定每个读取头特定的OTRC，然后应用于从数据存储介质访问数据。 应用OTRC访问数据的一种方式是使用OTRC调度随机排队的查询。 用于头的OTRC在缓冲存储器中引用，并应用于确定哪些目标数据可以被最快地访问。 寻求的安排是相应的。 具有标称搜索时间的单个表格可以用于所有头部，并为每个特定头部添加一个自定义加法器。 OTRC也可以应用于改变搜索算法。 也就是说，如果涉及的头部具有更好的OTRC，并且在涉及不太有利的OTRC的头部的情况下，可以更积极地进行给定的寻求操作。

公开(公告)号：US20120082866A1

公开(公告)日：2012-04-05

申请号：US12895564

申请日：2010-09-30

申请人： Shuaigang Xiao ,  Thomas Young Chang ,  Yingguo Peng ,  David Kuo ,  Kaizhong Gao ,  Tom Nolan ,  Ganping Ju

发明人： Shuaigang Xiao ,  Thomas Young Chang ,  Yingguo Peng ,  David Kuo ,  Kaizhong Gao ,  Tom Nolan ,  Ganping Ju

IPC分类号： G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/84 ,  G11B5/855

摘要： A perpendicular magnetic media includes a substrate, a patterned template, a seed layer and a magnetic layer. The patterned template is formed on the substrate and includes a plurality of growth sites that are evenly spaced apart from each other. The seed layer is formed over the patterned template and the exposed areas of the substrate. Magnetic material is sputter deposited onto the seed layer with one grain of the magnetic material nucleated over each of the growth sites. The grain size distribution of the magnetic material is reduced by controlling the locations of the growth sites which optimizes the performance of the perpendicular magnetic media.

摘要翻译： 垂直磁性介质包括衬底，图案化模板，种子层和磁性层。 图案化模板形成在基板上并且包括彼此均匀间隔开的多个生长位点。 种子层形成在图案化模板和基板的暴露区域上。 将磁性材料溅射沉积到种子层上，其中一颗磁性材料成核在每个生长位点上。 通过控制优化垂直磁性介质性能的生长部位的位置来减小磁性材料的粒度分布。

公开(公告)号：US06542331B1

公开(公告)日：2003-04-01

申请号：US09546576

申请日：2000-04-10

申请人： Thomas Young Chang ,  Terence Tin-Lok Lam ,  Edward HinPong Lee ,  Samuel Wonder Yuan

发明人： Thomas Young Chang ,  Terence Tin-Lok Lam ,  Edward HinPong Lee ,  Samuel Wonder Yuan

IPC分类号： G11B531

CPC分类号： G11B5/313 ,  G11B5/1272 ,  G11B5/17 ,  G11B5/1871 ,  G11B5/312

摘要： The magnetic head of the present invention includes a P1 pole having an opening formed therethrough, and a P2 pole that is formed over the opening. A second magnetic pole tip is positioned relative to the first magnetic pole such that the first magnetic pole is symmetrically disposed relative to the second magnetic pole tip. Induction coils may be helically wound around portions of the first and/or second magnetic poles, or, alternatively, a planar, spiral induction coil may be fabricated for use with the first and second magnetic poles. An enhanced embodiment includes a first magnetic pole tip piece having a length that defines the throat length of the magnetic head and a thickness that increases the gap at rearward portions of the second magnetic pole tip of the magnetic head.

摘要翻译： 本发明的磁头包括具有穿过其形成的开口的P1极和形成在开口上的P2极。 第二磁极尖端相对于第一磁极定位，使得第一磁极相对于第二磁极尖对称设置。 感应线圈可以螺旋地卷绕在第一和/或第二磁极的一部分周围，或者，可以制造平面的螺旋感应线圈，以与第一和第二磁极一起使用。 增强实施例包括具有限定磁头的喉部长度的长度的第一磁极尖端件和增加磁头的第二磁极端部的后部的间隙的厚度。

公开(公告)号：US6158107A

公开(公告)日：2000-12-12

申请号：US54055

申请日：1998-04-02

申请人： Thomas Young Chang ,  Jyh-Shuey Jerry Lo

发明人： Thomas Young Chang ,  Jyh-Shuey Jerry Lo

IPC分类号： G11B5/23 ,  G11B5/31 ,  G11B5/39 ,  G11B5/127 ,  G11B5/187

CPC分类号： G11B5/3116 ,  G11B5/3163 ,  G11B5/232 ,  G11B5/3967 ,  Y10T29/49032 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A method makes an inverted merged MR head with a second pole tip which is self-aligned with a top first pole tip. After forming a bottom first pole tip layer a top first pole tip is frame plated thereon with a width that defines a track width of the merged MR head. A photoresist layer, which is employed in the frame plating of the top first pole tip, is then soft baked which causes a photoresist opening above the top first pole tip to have sloping side edges which form a recess. An electrically-conductive sacrificial layer, such as copper, is then plated into the recess on top of the top first pole tip and the photoresist is removed. A forming layer, such as alumina, is then deposited and lapped so that the forming layer and the sacrificial layer have top surfaces that are flush with respect to one another. The sacrificial layer is then removed by an etchant that will not attack the materials of the pole tips and the forming layer. The forming layer now has a recess with sloping edges into which a gap layer, a seedlayer and a second pole tip layer are deposited. By this method the second pole tip is self-aligned with the top first pole tip with the second pole tip having a bottom that is substantially the same width as the top of the top first pole tip.

摘要翻译： 一种方法使得具有与顶部第一极尖自身对准的第二极尖的反向合并MR头。 在形成底部第一极尖端层之后，顶部第一极端部被框架镀覆在其上，其宽度限定了合并的MR头的轨道宽度。 用于顶部第一极尖端的框架电镀中的光致抗蚀剂层然后被软烘烤，这使得顶部第一极尖端上方的光致抗蚀剂开口具有形成凹部的倾斜侧边缘。 然后将诸如铜的导电牺牲层电镀到顶部第一极尖顶部的凹部中，并且去除光致抗蚀剂。 然后沉积和研磨诸如氧化铝的成形层，使得成形层和牺牲层具有相对于彼此齐平的顶表面。 然后通过不会攻击极尖和成形层的材料的蚀刻剂去除牺牲层。 成形层现在具有倾斜边缘的凹部，间隙层，籽晶层和第二极尖端层沉积到该凹部中。 通过该方法，第二极尖与顶部第一极尖自对准，第二极尖具有与顶部第一极尖的顶部基本相同的宽度的底部。

公开(公告)号：US06651313B1

公开(公告)日：2003-11-25

申请号：US09684227

申请日：2000-10-06

申请人： Thomas Young Chang ,  Michael Andrew Parker

发明人： Thomas Young Chang ,  Michael Andrew Parker

IPC分类号： G11B5127

CPC分类号： G11B5/3116 ,  G11B5/3163 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49046 ,  Y10T29/49048

摘要： In the present method for manufacturing a magnetic write head a focused ion beam (FIB) tool is utilized to mill the side edges of a P2 pole, in order to provide a narrowed track width. Prior to milling, a thin film layer of material is deposited upon the P2 pole tip. The milling boxes of the FIB tool are properly aligned upon the layer with reference to the location of the P2 pole tip. Milling of the lateral edges of the P2 pole tip is then conducted to the appropriate depth, and the layer of material is removed. The resulting P2 pole tip has sharp lateral edges, rather than the rounded edges that are produced in prior art FIB processing methods that do not utilize the thin film layer. In a preferred implementation, the FIB tool is utilized first to deposit the thin film layer and thereafter to perform the milling operation.

摘要翻译： 在本发明的磁写头的制造方法中，为了提供窄的轨道宽度，使用聚焦离子束（FIB）工具来研磨P2极的侧边缘。 在铣削之前，将薄膜层材料沉积在P2极尖端上。 参考P2极尖的位置，FIB工具的铣床在层上正确对准。 然后将P2极端部的侧边缘的铣削进行到适当的深度，并且去除材料层。 所得到的P2极端头具有尖锐的侧边缘，而不是在不利用薄膜层的现有技术FIB处理方法中产生的圆形边缘。 在优选的实施方式中，首先利用FIB工具沉积薄膜层，然后进行铣削操作。

公开(公告)号：US06473276B1

公开(公告)日：2002-10-29

申请号：US09721850

申请日：2000-11-24

申请人： Thomas Young Chang ,  Edward Hinpong Lee ,  Jyh-Shuey Jerry Lo

发明人： Thomas Young Chang ,  Edward Hinpong Lee ,  Jyh-Shuey Jerry Lo

IPC分类号： G11B539

CPC分类号： G11B5/3967 ,  G11B5/024 ,  G11B5/23 ,  G11B5/232 ,  G11B5/3116 ,  G11B5/3163 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A single-sided, notched write head is provided for writing narrow erase band servo tracks as well as a double-notched write head, and for writing data tracks better than a double-notched write head. The single-sided, notched write head writes a narrow erase band on the notched side and a wide erase band on the unnotched side. In one embodiment, only one side of the first pole piece layer is notched, and in another embodiment a first side of the first pole piece layer is notched more than a second side. By writing servo tracks only a fraction of the track width of the write head, a wide erase band region is overwritten so that a narrow erase band is on each side of the servo track. Data tracks are written with a narrow erase band on one side and a wide erase band on the other side. The wide erase band on one side of the data track allows more flexibility in spacing the read head from adjacent tracks. The single-sided, notched write head can be manufactured with methods that require less processing time than a double-notched write head. In one method, a notching layer is employed where removal of a small corner of the notching layer provides the first pole piece with a notch. Other methods employ photoresist to protect the side of the first pole piece that is not to be notched, and/or oscillating the workpiece less than 360°. so that milling is more concentrated at the notch site.

摘要翻译： 提供单面，带缺口的写入头，用于写入窄擦除带伺服磁道以及双切口写入头，并且用于比双切口写入头更好地写入数据轨道。 单面缺口写头在缺口侧写入窄擦除带，并在无缺口侧写入宽擦除带。 在一个实施例中，仅第一极靴层的一侧被切口，而在另一实施例中，第一极靴层的第一侧比第二侧更多地被切口。 通过仅将写入磁道的磁道宽度的一部分写入伺服磁道，将覆盖宽的擦除带区域，使得在伺服磁道的每一侧上存在窄的擦除带。 数据磁道在一侧写入窄的擦除频带，另一侧写入宽的擦除频带。 在数据轨道的一侧上的宽擦除带允许在读取头与相邻轨道间隔距离方面更加灵活。 单面，缺口写头可以使用比双切口写头要少的处理时间的方法制造。 在一种方法中，采用切口层，其中切口凹陷层的小角的移除为第一极片提供凹口。 其他方法使用光致抗蚀剂来保护第一极靴的不被切口的一侧，和/或使工件摆动小于360°。 使得铣削更集中在切口部位。

公开(公告)号：US06339872B1

公开(公告)日：2002-01-22

申请号：US09564155

申请日：2000-05-03

申请人： Thomas Young Chang ,  Edward Hinpong Lee ,  Jyh-Shuey Jerry Lo

发明人： Thomas Young Chang ,  Edward Hinpong Lee ,  Jyh-Shuey Jerry Lo

IPC分类号： G11B542

CPC分类号： G11B5/3967 ,  G11B5/024 ,  G11B5/23 ,  G11B5/232 ,  G11B5/3116 ,  G11B5/3163 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A single-sided, notched write head is provided for writing narrow erase band servo tracks as well as a double-notched write head, and for writing data tracks better than a double-notched write head. The single-sided, notched write head writes a narrow erase band on the notched side and a wide erase band on the unnotched side. In one embodiment, only one side of the first pole piece layer is notched, and in another embodiment a first side of the first pole piece layer is notched more than a second side. By writing servo tracks only a fraction of the track width of the write head, a wide erase band region is overwritten so that a narrow erase band is on each side of the servo track. Data tracks are written with a narrow erase band on one side and a wide erase band on the other side. The wide erase band on one side of the data track allows more flexibility in spacing the read head from adjacent tracks. The single-sided, notched write head can be manufactured with methods that require less processing time than a double-notched write head. In one method, a notching layer is employed where removal of a small corner of the notching layer provides the first pole piece with a notch. Other methods employ photoresist to protect the side of the first pole piece that is not to be notched, and/or oscillating the workpiece less than 360°C. so that milling is more concentrated at the notch site.

摘要翻译： 提供单面，带缺口的写入头，用于写入窄擦除带伺服磁道以及双切口写入头，并且用于比双切口写入头更好地写入数据轨道。 单面缺口写头在缺口侧写入窄擦除带，并在无缺口侧写入宽擦除带。 在一个实施例中，仅第一极靴层的一侧被切口，而在另一实施例中，第一极靴层的第一侧比第二侧更多地被切口。 通过仅将写入磁道的磁道宽度的一部分写入伺服磁道，将覆盖宽的擦除带区域，使得在伺服磁道的每一侧上存在窄的擦除带。 数据磁道在一侧写入窄的擦除频带，另一侧写入宽的擦除频带。 在数据轨道的一侧上的宽擦除带允许在读取头与相邻轨道间隔距离方面更加灵活。 单面，缺口写头可以使用比双切口写头要少的处理时间的方法制造。 在一种方法中，采用切口层，其中切口凹陷层的小角的移除为第一极片提供凹口。 其他方法使用光致抗蚀剂来保护第一极靴的不被切口的一侧，和/或使工件摆动小于360℃。 使得铣削更集中在切口部位。

公开(公告)号：US06330128B1

公开(公告)日：2001-12-11

申请号：US09299542

申请日：1999-04-26

申请人： Thomas Young Chang ,  Glen Adam Garfunkel ,  Edward Hin Pong Lee ,  Neil Leslie Robertson ,  Samuel Wonder Yuan

发明人： Thomas Young Chang ,  Glen Adam Garfunkel ,  Edward Hin Pong Lee ,  Neil Leslie Robertson ,  Samuel Wonder Yuan

IPC分类号： G11B5147

CPC分类号： G11B5/3103 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3967 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/4906

摘要： A magnetic head assembly has an open yoke type write head constructed on top of a read head so that the write head can be constructed with a very narrow track width without restraint by the requirements of the read head. The write head has first and second pole piece portions wherein the second pole piece portion has separate front and back layer portions. A coil layer is wrapped around only the first pole piece portion and the back layer portion so that the front layer portion can be constructed separately to provide a narrow track width. Further, in a preferred embodiment the front layer portion has a reduced thickness and a higher magnetic moment than the thickness and magnetic moment of the first pole piece portion and the back layer portion. Still further, in a preferred embodiment the first pole piece portion and the back layer portion are planar due to planarization of underlying layers.

摘要翻译： 磁头组件具有构造在读头的顶部上的开式轭型写入头，使得写入头可以被构造成具有非常窄的轨道宽度，而不受读取头的要求的限制。 写头具有第一和第二极靴部分，其中第二极靴部分具有分离的前部和后部部分。 线圈层仅缠绕在第一极靴部分和背层部分上，使得前层部分可以分开构造以提供窄的轨道宽度。 此外，在优选实施例中，前层部分具有比第一极靴部分和背部部分的厚度和磁矩更小的厚度和更高的磁矩。 此外，在优选实施例中，由于下层的平坦化，第一极片部分和背层部分是平面的。

公开(公告)号：US06201670B1

公开(公告)日：2001-03-13

申请号：US08876451

申请日：1997-06-16

申请人： Thomas Young Chang ,  Edward Hinpong Lee ,  Jyh-Shuey Jerry Lo

发明人： Thomas Young Chang ,  Edward Hinpong Lee ,  Jyh-Shuey Jerry Lo

IPC分类号： G11B539

CPC分类号： G11B5/3967 ,  G11B5/024 ,  G11B5/23 ,  G11B5/232 ,  G11B5/3116 ,  G11B5/3163 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A single-sided, notched write head is provided for writing narrow erase band servo tracks as well as a double-notched write head, and for writing data tracks better than a double-notched write head. The single-sided, notched write head writes a narrow erase band on the notched side and a wide erase band on the unnotched side. In one embodiment, only one side of the first pole piece layer is notched, and in another embodiment a first side of the first pole piece layer is notched more than a second side. By writing servo tracks only a fraction of the track width of the write head, a wide erase band region is overwritten so that a narrow erase band is on each side of the servo track. Data tracks are written with a narrow erase band on one side and a wide erase band on the other side. The wide erase band on one side of the data track allows more flexibility in spacing the read head from adjacent tracks. The single-sided, notched write head can be manufactured with methods that require less processing time than a double-notched write head. In one method, a notching layer is employed where removal of a small corner of the notching layer provides the first pole piece with a notch. Other methods employ photoresist to protect the side of the first pole piece that is not to be notched, and/or oscillating the workpiece less than 360°, so that milling is more concentrated at the notch site.

摘要翻译： 提供单面，带缺口的写入头，用于写入窄擦除带伺服磁道以及双切口写入头，并且用于比双切口写入头更好地写入数据轨道。 单面缺口写头在缺口侧写入窄擦除带，并在无缺口侧写入宽擦除带。 在一个实施例中，仅第一极靴层的一侧被切口，而在另一实施例中，第一极靴层的第一侧比第二侧更多地被切口。 通过仅将写入磁道的磁道宽度的一部分写入伺服磁道，将覆盖宽的擦除带区域，使得在伺服磁道的每一侧上存在窄的擦除带。 数据磁道在一侧写入窄的擦除频带，另一侧写入宽的擦除频带。 在数据轨道的一侧上的宽擦除带允许在读取头与相邻轨道间隔距离方面更加灵活。 单面，缺口写头可以使用比双切口写头要少的处理时间的方法制造。 在一种方法中，采用切口层，其中切口凹陷层的小角的移除为第一极片提供凹口。 其他方法使用光致抗蚀剂来保护第一极片的不被切口的一侧和/或使工件摆动小于360°，使得铣削更集中在切口部位。

公开(公告)号：US06069775A

公开(公告)日：2000-05-30

申请号：US996433

申请日：1997-12-22

申请人： Thomas Young Chang ,  Jyh-Shuey Jerry Lo

发明人： Thomas Young Chang ,  Jyh-Shuey Jerry Lo

IPC分类号： G11B5/012 ,  G11B5/31 ,  G11B5/39 ,  G11B5/127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/3163 ,  G11B2005/3996 ,  G11B5/012 ,  G11B5/3967 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49052

摘要： A method makes an inverted merged MR head with a second pole tip layer which is self-aligned with a top first pole tip layer. After forming a bottom first pole tip layer, which is relatively thin and relatively wide, a top first pole tip layer is formed thereon with a width that defines the track width of the merged MR head. A second pole tip forming layer is formed on the top first pole tip layer and layers adjacent both sides of the top first pole tip layer. The forming layer and the top first pole tip layer are lapped so that their top surfaces are flush with one another. Ion milling is then implemented to mill the top first pole tip layer at a faster rate than the forming layer causing a recess that is defined by a top surface of the top first pole tip layer and inclined surfaces of the forming layer immediately adjacent thereto. After formation of a write gap layer in the recess a second pole tip layer is formed in a recess replicated by the write gap layer causing a bottom base portion of the second pole tip layer to be substantially the same width as the track width and aligned with the top first pole tip layer so that flux can be transferred between the pole tips more narrowly confined within the track width.

摘要翻译： 一种方法使得具有与顶部第一极尖端层自对准的第二极尖端层的反向合并MR头。 在形成相当薄且相对宽的底部第一极尖端层之后，在其上形成顶部第一极尖端层，其宽度限定了合并的MR头的轨道宽度。 第二极尖形成层形成在顶部第一极尖端层和邻近顶部第一极尖端层两侧的层。 成形层和顶部第一极尖端层被重叠，使得它们的顶表面彼此齐平。 然后实施离子铣削，以比形成层更快的速度铣削顶部第一极尖端层，所述形成层形成由顶部第一极尖端层的顶表面和紧邻其的形成层的倾斜表面限定的凹部。 在凹部中形成写间隙层后，在由写间隙层复制的凹部中形成第二极尖端层，使第二极尖端层的底部基部与轨道宽度基本相同的宽度并与 顶部的第一极尖端层，使得焊剂可以在极尖之间传输更狭窄地限制在轨道宽度内。