公开(公告)号：US08670213B1

公开(公告)日：2014-03-11

申请号：US13422997

申请日：2012-03-16

申请人： Wanxue Zeng ,  Weimin Si ,  Ying Hong ,  Zhigang Bai

发明人： Wanxue Zeng ,  Weimin Si ,  Ying Hong ,  Zhigang Bai

IPC分类号： G11B5/23 ,  B44C1/22

CPC分类号： G11B5/232 ,  G11B5/235 ,  G11B5/3116 ,  G11B5/3163

摘要： A writer main pole for a perpendicular magnetic recording system is provided. The writer pole has a tunable bottom gap to side gap ratio, and may be formed using deposition of a first seed layer through an ion beam deposition process, deposition of a second seed layer through a physical vapor deposition process, and deposition of a non-magnetic gap layer through a chemical vapor deposition process.

摘要翻译： 提供了一种用于垂直磁记录系统的写入器主极。 写入器极具有可调节的底部间隙与侧面间隙比，并且可以通过通过离子束沉积工艺沉积第一种子层，通过物理气相沉积工艺沉积第二籽晶层， 磁隙层通过化学气相沉积工艺。

公开(公告)号：US08611046B2

公开(公告)日：2013-12-17

申请号：US12799131

申请日：2010-04-19

申请人： Yan Wu ,  Zhigang Bai ,  Moris Dovek ,  Cherng-Chyi Han ,  Min Li ,  Jianing Zhou ,  Jiun-Ting Lee ,  Min Zheng

发明人： Yan Wu ,  Zhigang Bai ,  Moris Dovek ,  Cherng-Chyi Han ,  Min Li ,  Jianing Zhou ,  Jiun-Ting Lee ,  Min Zheng

IPC分类号： G11B5/11 ,  G11B5/23 ,  G11B5/31

CPC分类号： G11B5/105 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3163

摘要： A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a graded side shield that is conformal to the shape of the pole tip at an upper portion of the shield but not conformal to the pole tip at a lower portion. The shield includes a trailing shield, that is conformal to the trailing edge of the pole tip and may include a leading edge shield that magnetically connects two bottom ends of the graded side shield.

摘要翻译： 垂直磁记录（PMR）头被制造成具有通过分级侧屏蔽横向屏蔽的极尖，该平面侧屏蔽保护层在屏蔽的上部处与极尖的形状保持一致，但在下部不与极尖共形。 屏蔽件包括后挡板，其与电极尖端的后缘保持一致，并且可以包括磁性连接分级侧屏蔽件的两个底端的前缘屏蔽件。

公开(公告)号：US08547661B2

公开(公告)日：2013-10-01

申请号：US12589274

申请日：2009-10-21

申请人： Zhigang Bai

发明人： Zhigang Bai

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

CPC分类号： G11B5/3163 ,  G11B5/3153 ,  G11B2005/001 ,  G11B2005/0024

摘要： The invention discloses a MAMR head that has the STO stack placed at the trailing side of the write element, with both STO and write element completely self-aligned in the cross track direction. A method for defining both the MP and the STO stack geometries in a single step is also described.

摘要翻译： 本发明公开了一种MAMR头，其具有放置在写入元件的后侧的STO堆叠，STO和写入元件在交叉轨道方向上完全自对准。 还描述了在单个步骤中同时定义MP和STO堆叠几何的方法。

公开(公告)号：US08542461B2

公开(公告)日：2013-09-24

申请号：US12806803

申请日：2010-08-20

申请人： Zhigang Bai ,  Moris Dovek ,  Yan Wu

发明人： Zhigang Bai ,  Moris Dovek ,  Yan Wu

IPC分类号： G11B5/147 ,  G11B5/187

CPC分类号： G11B5/3163 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/312 ,  G11B5/3146

摘要： A perpendicular magnetic recording (PMR) head is fabricated with a configuration of leading edge shields and trailing edge shields that reduce the leakage of flux between the main pole and the shields. The reduction of leakage is achieved by eliminating the sharp 90° corner between the backside surfaces of the shields and the surfaces adjacent to the main pole. In one embodiment the corner is replaced by two successive acute angles, in another embodiment it is replaced by a rounded surface. In a final embodiment, leakage between the pole and trailing edge shield is achieved by shortening the length of the write gap by forming the shield with a double taper.

摘要翻译： 垂直磁记录（PMR）头被制造成具有前缘屏蔽和后缘屏蔽的结构，其减小主极和屏蔽之间的通量泄漏。 通过消除屏蔽的背面和与主极相邻的表面之间的尖锐的90°角来实现泄漏的减少。 在一个实施例中，角部被两个连续的锐角取代，在另一个实施例中，它被圆形表面所代替。 在最终实施例中，通过用双锥形形成屏蔽来缩短写入间隙的长度来实现极和后缘屏蔽之间的泄漏。

公开(公告)号：US08525311B2

公开(公告)日：2013-09-03

申请号：US13170206

申请日：2011-06-28

申请人： Zhigang Bai ,  Jinzhong Yao ,  Xuesong Xu

发明人： Zhigang Bai ,  Jinzhong Yao ,  Xuesong Xu

IPC分类号： H01L33/62

CPC分类号： H01L23/49558 ,  H01L24/48 ,  H01L24/49 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/49109 ,  H01L2924/00014 ,  H01L2924/10253 ,  H01L2924/14 ,  H01L2924/181 ,  H01L2924/00 ,  H01L2924/00012 ,  H01L2224/45099 ,  H01L2224/45015 ,  H01L2924/207

摘要： A lead frame for a semiconductor device has a die pad with a first major surface for receiving an semiconductor die and a connection bar that encircles the die pad. First lead fingers that project from the connection bar towards the die pad have proximal ends close to the die pad and distal ends connected to the connection bar. The proximal ends of the first lead fingers lie in a first plane. Second lead fingers that project from the connection bar towards the die pad have proximal ends close to the die pad and distal ends connected to the connection bar. The proximal ends of the second lead fingers lie in a second plane that is parallel and spaced from the first plane. An isolation frame is disposed between the proximal ends of the first and second lead fingers. The isolation frame separates but supports the proximal ends of the first and second lead fingers.

摘要翻译： 用于半导体器件的引线框具有具有用于接收半导体管芯的第一主表面的管芯焊盘和环绕管芯焊盘的连接杆。 从连接杆朝向管芯焊盘突出的第一引线指端具有靠近管芯焊盘的近端，并且远端连接到连接杆。 第一引线指的近端位于第一平面中。 从连接杆朝向管芯焊盘突出的第二引线指端具有靠近管芯焊盘的近端，并且远端连接到连接杆。 第二引线指的近端位于与第一平面平行并间隔开的第二平面中。 隔离框架设置在第一和第二引线指的近端之间。 隔离框架分离但支撑第一和第二引线指的近端。

公开(公告)号：US08514517B1

公开(公告)日：2013-08-20

申请号：US13174619

申请日：2011-06-30

申请人： Sharat Batra ,  Ut Tran ,  Zhigang Bai ,  Kevin K. Lin

发明人： Sharat Batra ,  Ut Tran ,  Zhigang Bai ,  Kevin K. Lin

IPC分类号： G11B5/17

CPC分类号： G11B5/17 ,  G11B5/1278 ,  G11B5/3123 ,  G11B5/3136 ,  G11B2005/0005

摘要： Systems and methods for providing hybrid coils for magnetic write heads used in disk drives are described. One such system includes a magnetic read/write head including a read transducer, and a write transducer including a pair of write poles, a hybrid coil including a first coil having a pancake coil configuration including at least one turn positioned between the pair of write poles, and a second coil having a helical coil configuration including a plurality of turns positioned between the pair of write poles, the second coil coupled to the first coil, where the at least one turn of the first coil is interleaved with the turns of the second coil.

摘要翻译： 描述了用于为磁盘驱动器中使用的写磁头提供混合线圈的系统和方法。 一种这样的系统包括包括读取换能器的磁读/写头和包括一对写磁极的写换能器，包括具有扁平线圈配置的第一线圈的混合线圈，该扁平线圈配置包括位于一对写极之间的至少一匝 以及具有螺旋线圈结构的第二线圈，其包括位于所述一对写入极之间的多个匝，所述第二线圈耦合到所述第一线圈，其中所述第一线圈的所述至少一个匝与所述第二线圈的匝相交叉 线圈

公开(公告)号：US08354739B2

公开(公告)日：2013-01-15

申请号：US13092159

申请日：2011-04-22

申请人： Yeqing Su ,  Zhigang Bai ,  Weimin Chen ,  Wei Shen ,  Jianhong Wang ,  Baoguan Yin ,  Wanming Yu

发明人： Yeqing Su ,  Zhigang Bai ,  Weimin Chen ,  Wei Shen ,  Jianhong Wang ,  Baoguan Yin ,  Wanming Yu

IPC分类号： H01L23/495 ,  H01L21/28

CPC分类号： H01L21/6835 ,  H01L21/568 ,  H01L23/3107 ,  H01L23/49541 ,  H01L24/48 ,  H01L24/85 ,  H01L2224/05554 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/8501 ,  H01L2924/00014 ,  H01L2924/18165 ,  H01L2224/45099

摘要： A method for manufacturing a thin semiconductor package includes providing a lead frame with a removable substrate that has an attaching surface attached to a first surface of the lead frame. The lead frame is formed from an electrically conductive sheet and has leads that extend inwardly from a lead frame boundary towards a central region of the lead frame. A semiconductor die is mounted on the removable substrate at the central region. The semiconductor die has a connection pad surface with die pads on it, and the connection pad surface is attached to the attaching surface of the removable substrate. The lead frame and die are encapsulated with a first encapsulant so that the lead frame is sandwiched between the first encapsulant and the removable substrate. The removable substrate is removed from the lead frame to expose the first surface of the lead frame and then the die pads are electrically connected to respective ones of the leads. The die and lead frame then are encapsulated with a second encapsulant so that the lead frame and die are sandwiched between the first and second encapsulants. Part of the first encapsulant is then removed to reduce the thickness of the package and expose the leads.

摘要翻译： 一种用于制造薄半导体封装的方法，包括：提供具有可移除基板的引线框架，该可移除基板具有附接到引线框架的第一表面的附接表面。 引线框架由导电片形成，并且具有从引线框架边界朝向引线框架的中心区域向内延伸的引线。 半导体管芯安装在中央区域的可拆卸基板上。 半导体管芯具有连接焊盘表面，其上具有焊盘，并且连接焊盘表面附接到可移除基板的附接表面。 引线框架和管芯用第一密封剂封装，使得引线框架夹在第一密封剂和可移除基板之间。 将可移除基板从引线框架移除以露出引线框架的第一表面，然后将管芯焊盘电连接到相应的引线。 然后，管芯和引线框架用第二密封剂封装，使得引线框架和管芯夹在第一和第二密封剂之间。 然后去除部分第一密封剂以减小包装的厚度并暴露引线。

公开(公告)号：US20120286406A1

公开(公告)日：2012-11-15

申请号：US13461801

申请日：2012-05-02

申请人： Shunan QIU ,  Zhigang Bai ,  Xuesong Xu ,  Beiyue Yan ,  You Ge

发明人： Shunan QIU ,  Zhigang Bai ,  Xuesong Xu ,  Beiyue Yan ,  You Ge

IPC分类号： H01L23/495 ,  H01L21/00

CPC分类号： H01L23/49555 ,  H01L21/4842 ,  H01L2924/0002 ,  H01L2924/00

摘要： A process for assembling a semiconductor device includes providing a lead frame having a native plane and a plurality of leads having a native lead pitch. The process includes trimming and forming a first subset of the plurality of leads to provide a first row of leads. The process includes trimming and forming a second subset of the plurality of leads to provide a second row of leads. At least one subset of leads is formed with an obtuse angle relative to the native plane such that lead pitch associated with the first or second subset of leads is greater than the native lead pitch.

摘要翻译： 一种用于组装半导体器件的方法包括提供具有天然平面的引线框架和具有天然引线间距的多个引线。 该过程包括修剪和形成多个引线的第一子集以提供第一行引线。 该过程包括修剪和形成多个引线的第二子集以提供第二排引线。 引线的至少一个子集以相对于天平平面的钝角形成，使得与引线的第一或第二子集相关联的引线间距大于原始引线间距。

公开(公告)号：US08276258B1

公开(公告)日：2012-10-02

申请号：US12198657

申请日：2008-08-26

申请人： Ut Tran ,  Zhigang Bai

发明人： Ut Tran ,  Zhigang Bai

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/3163 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315

摘要： A method and system provide a magnetic transducer that includes an underlayer and a first nonmagnetic layer on the underlayer. The method and system include providing a first trench in the first nonmagnetic layer. The first trench has at least one edge corresponding to at least one side shield. The method and system also include providing a second nonmagnetic layer in the first trench and providing a second trench in the second nonmagnetic layer. The method and system include providing the main pole. At least part of the main pole resides in the second trench. The method and system further include removing at least a portion of the second nonmagnetic layer between the edge(s) and the main pole. The method and system also provide the side shield(s) in the first trench. The side shield(s) extend from at least an air-bearing surface location to not further than a coil front location.

摘要翻译： 一种方法和系统提供一种磁传感器，其包括底层上的底层和第一非磁性层。 该方法和系统包括在第一非磁性层中提供第一沟槽。 第一沟槽具有至少一个对应于至少一个侧面屏蔽的边缘。 该方法和系统还包括在第一沟槽中提供第二非磁性层，并在第二非磁性层中提供第二沟槽。 该方法和系统包括提供主极。 主极的至少一部分位于第二沟槽中。 所述方法和系统还包括在所述边缘和所述主极之间移除所述第二非磁性层的至少一部分。 该方法和系统还在第一沟槽中提供侧屏蔽。 侧护罩从至少一个空气轴承表面位置延伸到不超过线圈前部位置。

公开(公告)号：US08228633B1

公开(公告)日：2012-07-24

申请号：US12196131

申请日：2008-08-21

申请人： Ut Tran ,  Zhigang Bai

发明人： Ut Tran ,  Zhigang Bai

IPC分类号： G11B5/23

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/3163

摘要： A method and system provide a magnetic transducer that includes an air-bearing surface (ABS). The magnetic transducer includes an underlayer and a main pole residing on the underlayer. The main pole includes a front and a rear. The front resides at the ABS, while the rear is distal from the ABS. The main pole also includes a first portion having a first magnetic moment and a second portion having a second magnetic moment. The first portion has a front face at the ABS and terminates between the ABS and the rear of the main pole. A part of the second portion resides on the first portion, while another part of the second portion resides between the first portion of the main pole and the rear of the main pole. The first magnetic moment is less than the second magnetic moment.

摘要翻译： 一种方法和系统提供包括空气轴承表面（ABS）的磁换能器。 磁换能器包括底层和位于底层上的主极。 主杆包括前部和后部。 前部位于ABS，而后部位于ABS的远端。 主极还包括具有第一磁矩的第一部分和具有第二磁矩的第二部分。 第一部分在ABS处具有前表面并且终止于ABS和主极的后部之间。 第二部分的一部分位于第一部分上，而第二部分的另一部分位于主极的第一部分和主极的后部之间。 第一个磁矩小于第二个磁矩。