公开(公告)号：US20150243623A1

公开(公告)日：2015-08-27

申请号：US14551070

申请日：2014-11-23

申请人： Zhijie Wang ,  Zhigang Bai ,  Aipeng Shu ,  Yanbo Xu ,  Huchang Zhang ,  Fei Zong

发明人： Zhijie Wang ,  Zhigang Bai ,  Aipeng Shu ,  Yanbo Xu ,  Huchang Zhang ,  Fei Zong

IPC分类号： H01L23/00 ,  H01L23/29 ,  H01L21/56

CPC分类号： H01L24/17 ,  H01L23/3128 ,  H01L23/49838 ,  H01L23/49861 ,  H01L24/11 ,  H01L24/48 ,  H01L24/49 ,  H01L24/85 ,  H01L24/97 ,  H01L2224/05552 ,  H01L2224/16225 ,  H01L2224/32225 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/49171 ,  H01L2224/73265 ,  H01L2224/85 ,  H01L2224/85401 ,  H01L2224/92247 ,  H01L2924/00014 ,  H01L2924/15173 ,  H01L2924/181 ,  H01L2224/45099 ,  H01L2924/00012 ,  H01L2924/014 ,  H01L2924/00

摘要： A grid array assembly is formed from an electrical insulating material with embedded solder deposits. A first portion of each of the solder deposits is exposed on a first surface of the insulating material and a second portion of each of the solder deposits is exposed on an opposite surface of the insulating material. A semiconductor die is mounted to the first surface of the insulating material and electrodes of the die are connected to the solder deposits with bond wires. The die, bond wires, and the first surface of the insulating material then are covered with a protective encapsulating material.

摘要翻译： 栅极阵列组件由具有嵌入式焊料沉积物的电绝缘材料形成。 每个焊料沉积物的第一部分暴露在绝缘材料的第一表面上，并且每个焊料沉积物的第二部分暴露在绝缘材料的相对表面上。 将半导体管芯安装在绝缘材料的第一表面上，并且将管芯的电极与焊丝连接到焊料沉积物上。 然后用保护性封装材料覆盖管芯，接合线和绝缘材料的第一表面。

公开(公告)号：US20140191383A1

公开(公告)日：2014-07-10

申请号：US14205374

申请日：2014-03-12

申请人： Jinzhong YAO ,  Zhigang Bai ,  Xuesong Xu

发明人： Jinzhong YAO ,  Zhigang Bai ,  Xuesong Xu

IPC分类号： H01L23/495

CPC分类号： H01L23/49537 ,  H01L21/561 ,  H01L21/565 ,  H01L23/3107 ,  H01L23/4334 ,  H01L23/49551 ,  H01L23/49568 ,  H01L24/13 ,  H01L24/16 ,  H01L24/29 ,  H01L24/32 ,  H01L24/45 ,  H01L24/48 ,  H01L24/49 ,  H01L24/73 ,  H01L24/97 ,  H01L2224/13101 ,  H01L2224/1329 ,  H01L2224/16245 ,  H01L2224/2919 ,  H01L2224/32245 ,  H01L2224/45124 ,  H01L2224/45144 ,  H01L2224/45147 ,  H01L2224/48247 ,  H01L2224/49171 ,  H01L2224/73207 ,  H01L2224/73253 ,  H01L2224/73265 ,  H01L2224/83192 ,  H01L2224/92242 ,  H01L2224/97 ,  H01L2924/00014 ,  H01L2924/0781 ,  H01L2924/12042 ,  H01L2924/1305 ,  H01L2924/13055 ,  H01L2924/1306 ,  H01L2924/13062 ,  H01L2924/13091 ,  H01L2924/181 ,  H01L2924/00 ,  H01L2924/0665 ,  H01L2924/014 ,  H01L2924/00012

摘要： A method of packaging a power semiconductor die includes providing a first lead frame of a dual gauge lead frame. The first lead frame includes a thick die pad. A tape is attached to a first side of the thick die pad and the power die is attached to a second side of the thick die pad. A second lead frame of the dual gauge lead frame is provided. The second lead frame has thin lead fingers. One end of the lead fingers is attached to an active surface of the power die such that the lead fingers are electrically connected to bonding pads of the power die. A molding compound is then dispensed onto a top surface of the dual gauge lead frame such that the molding compound covers the power die and the lead fingers.

摘要翻译： 封装功率半导体管芯的方法包括提供双量规引线框架的第一引线框架。 第一引线框架包括厚的芯片焊盘。 磁带附着到厚芯片焊盘的第一侧，并且功率管芯附接到厚芯片焊盘的第二侧。 提供了双量规引线框架的第二引线框架。 第二引线框架具有薄的引线指。 引线指的一端连接到功率管芯的有源表面，使得引线指电连接到功率管芯的焊盘。 然后将模塑料分配到双量规引线框架的顶表面上，使得模制化合物覆盖电源模具和引线指。

公开(公告)号：US08705205B1

公开(公告)日：2014-04-22

申请号：US13169685

申请日：2011-06-27

申请人： Yunfei Li ,  Lijie Guan ,  Ying Hong ,  Zhigang Bai ,  Jinqiu Zhang ,  Yugang Wang ,  Feng Liu ,  Tao Pan

发明人： Yunfei Li ,  Lijie Guan ,  Ying Hong ,  Zhigang Bai ,  Jinqiu Zhang ,  Yugang Wang ,  Feng Liu ,  Tao Pan

IPC分类号： G11B5/127

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

摘要： A magnetic transducer having an air-bearing surface (ABS) is described. The magnetic transducer includes a pole and at least one coil for energizing the pole. The pole has a pole tip proximate to the ABS, a yoke distal from the ABS, and a bottom surface including a bottom bevel. At least the yoke includes at least one sidewall having a first angle and a second angle. The first angle is between the bottom surface and the at least one sidewall. The second angle is a constant distance along the at least one sidewall from the first angle.

摘要翻译： 描述了具有空气轴承表面（ABS）的磁换能器。 磁换能器包括极和用于激励极的至少一个线圈。 杆具有靠近ABS的极尖端，远离ABS的轭，以及包括底部斜面的底表面。 至少轭包括具有第一角度和第二角度的至少一个侧壁。 第一角度在底表面和至少一个侧壁之间。 第二角度是从第一角度沿着至少一个侧壁的恒定距离。

公开(公告)号：US08582238B1

公开(公告)日：2013-11-12

申请号：US13279105

申请日：2011-10-21

申请人： Feng Liu ,  Zhigang Bai ,  Dehua Han ,  Ming Sun ,  Yugang Wang ,  Tao Pan

发明人： Feng Liu ,  Zhigang Bai ,  Dehua Han ,  Ming Sun ,  Yugang Wang ,  Tao Pan

IPC分类号： G11B5/33

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

摘要： Systems and methods for providing perpendicular magnetic writers having gradient magnetic moment side shields are provided. In one case, the system includes a pole having a leading edge and trailing edge, a leading shield positioned closer to the leading edge than the trailing edge, the leading shield having a leading shield moment, a trailing shield positioned closer to the trailing edge than the leading edge, the trailing shield having a trailing shield moment greater than the leading shield moment, and a side shield positioned along side of the pole, the side shield including a gradient magnetic moment progressing from a first side shield moment to a second side shield moment, where the first side shield moment is about equal to the leading shield moment, and where the second side shield moment is about equal to the trailing shield moment and positioned closer to the trailing shield than the leading shield.

摘要翻译： 提供了用于提供具有梯度磁矩侧屏蔽的垂直磁性写入器的系统和方法。 在一种情况下，系统包括具有前缘和后缘的杆，位于比后缘更靠近前缘的前护罩，前护罩具有前屏蔽力矩，位于靠近后缘的后挡板比 所述前缘，所述后挡板具有大于所述前屏蔽力矩的后屏蔽力矩，以及沿所述杆的侧面定位的侧屏蔽，所述侧屏蔽包括从第一侧屏蔽力矩到第二侧屏蔽的梯度磁矩 其中第一侧面屏蔽力矩大约等于前导屏蔽力矩，并且其中第二侧面屏蔽力矩大约等于尾部屏蔽力矩，并且位于比前导屏蔽件更靠近尾部屏蔽件的位置。

公开(公告)号：US08488272B1

公开(公告)日：2013-07-16

申请号：US13433587

申请日：2012-03-29

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

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

IPC分类号： G11B5/127

CPC分类号： G11B5/315 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/3163 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A magnetic recording transducer includes a main pole including a nose portion, the nose portion terminating at an air-bearing surface (ABS). The magnetic recording transducer further includes at least one coil having a coil front distal from the ABS, and at least one side shield, the at least one side shield extending from at the ABS to not further than the coil front.

摘要翻译： 磁记录传感器包括一个主极，其包括一个鼻部，鼻部终止在空气轴承表面（ABS）处。 磁记录传感器还包括至少一个线圈，其具有远离ABS的线圈前端，以及至少一个侧屏蔽，所述至少一个侧屏蔽件从ABS延伸到不超过线圈前端。

公开(公告)号：US20130003226A1

公开(公告)日：2013-01-03

申请号：US13608321

申请日：2012-09-10

申请人： Zhigang Bai ,  Kowang Liu ,  Yan Wu ,  Moris Dovek

发明人： Zhigang Bai ,  Kowang Liu ,  Yan Wu ,  Moris Dovek

IPC分类号： G11B5/127 ,  G11B5/147

CPC分类号： G11B5/398 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3186 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49048

摘要： A perpendicular magnetic recording (PMR) head is fabricated with a multi-level tapered write pole. The write pole comprises a main pole with a tapered tip on a leading edge or a trailing edge, on which is formed at least one yoke that has a tapered edge. The edge of the yoke is recessed from the ABS of the main pole, giving the head a stepped profile. The yoke can be a single yoke formed on one side of the main pole or it can be two yokes formed on both the leading and trailing sides of the main pole. The write pole structure creates an efficient channeling of magnetic flux to the ABS surface of the pole tip which produces magnetic recording field at high area densities.

摘要翻译： 垂直磁记录（PMR）头用多级锥形写柱制造。 写极包括在前缘或后缘具有锥形尖端的主极，在其上形成有至少一个具有锥形边缘的轭。 轭的边缘从主极的ABS凹入，使头部呈阶梯状。 轭可以是形成在主极的一侧上的单个磁轭，或者它可以是形成在主极的前侧和后侧的两个轭。 写磁极结构产生磁通量到磁极尖端的ABS表面的有效的通道，其产生高区域密度的磁记录场。

公开(公告)号：US20130001190A1

公开(公告)日：2013-01-03

申请号：US13608308

申请日：2012-09-10

申请人： Zhigang Bai ,  Kowang Liu ,  Yan Wu ,  Moris Dovek

发明人： Zhigang Bai ,  Kowang Liu ,  Yan Wu ,  Moris Dovek

IPC分类号： G11B5/127

CPC分类号： G11B5/398 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3186 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49048

摘要： A perpendicular magnetic recording (PMR) head is fabricated with a multi-level tapered write pole which creates an efficient channeling of magnetic flux to the pole tip. The write pole comprises a main pole with a tapered tip on which is formed at least one yoke that has a tapered edge. The edge of the yoke is recessed from the ABS of the tapered tip, giving the write pole a stepped profile. The tapered tip can be two sloped surfaces that are symmetric about a mid plane of the main pole or a single sloped edge on the leading side or the trailing side of the pole. The yoke structure can consist of a single yoke formed on one side of the main pole or it can consist of two yokes formed symmetrically on both the leading and trailing sides of the main pole.

摘要翻译： 垂直磁记录（PMR）头由多级锥形写极制造，其产生磁极到磁极尖端的有效沟道。 写入极包括具有锥形尖端的主极，其上形成有至少一个具有锥形边缘的轭。 轭的边缘从锥形尖端的ABS凹入，使写极为阶梯轮廓。 锥形尖端可以是关于主极的中间平面对称的两个倾斜表面或在极的前侧或后侧的单个倾斜边缘。 轭结构可以由形成在主极的一侧上的单个磁轭组成，或者可以由在主极的前后两侧对称地形成的两个磁轭组成。

公开(公告)号：US08264792B2

公开(公告)日：2012-09-11

申请号：US12387534

申请日：2009-05-04

申请人： Zhigang Bai ,  Kowang Liu ,  Yan Wu ,  Moris Dovek

发明人： Zhigang Bai ,  Kowang Liu ,  Yan Wu ,  Moris Dovek

IPC分类号： G11B5/31

CPC分类号： G11B5/398 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3186 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49048

摘要： A perpendicular magnetic recording (PMR) head is fabricated with a multi-level tapered write pole for efficient channeling of magnetic flux. The write pole comprises a main pole with a tapered tip on which is formed at least one yoke that has a tapered edge. The edge of the yoke is recessed from the ABS of the tapered tip, giving the write pole a stepped profile. The tapered tip can be two sloped surfaces that are symmetric about a mid-plane of the main pole or a single sloped edge on the leading side or the trailing side of the pole. The yoke structure can consist of a single yoke formed on one side of the main pole or it can consist of two yokes formed symmetrically on both the leading and trailing sides of the main pole.

摘要翻译： 垂直磁记录（PMR）头由多级锥形写极制造，用于磁通的高效通道。 写入极包括具有锥形尖端的主极，其上形成有至少一个具有锥形边缘的轭。 轭的边缘从锥形尖端的ABS凹入，给写极一个阶梯轮廓。 锥形尖端可以是关于主极的中间平面对称的两个倾斜表面或在极的前侧或后侧的单个倾斜边缘。 轭结构可以由形成在主极的一侧上的单个磁轭组成，或者可以由在主极的前后两侧对称地形成的两个磁轭组成。

公开(公告)号：US08179628B2

公开(公告)日：2012-05-15

申请号：US12803874

申请日：2010-07-08

申请人： Yuchen Zhou ,  Tobias Maletzky ,  Xuhui Jin ,  Zhigang Bai ,  Kenichi Takano ,  Erhard Schreck

发明人： Yuchen Zhou ,  Tobias Maletzky ,  Xuhui Jin ,  Zhigang Bai ,  Kenichi Takano ,  Erhard Schreck

IPC分类号： G11B5/02 ,  G11B11/00

CPC分类号： G11B5/314 ,  B82Y20/00 ,  G02B6/1226 ,  G11B5/3163 ,  G11B5/6088 ,  G11B2005/0021

摘要： A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser generated plasmons in a magnetic core plasmon antenna to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. To enable the TAMR head to operate most effectively, the maximum gradient and value of the magnetic recording field should be at a point of the magnetic medium that is as close as possible to the point being heated. In addition, the coupling between the optical mode and the plasmon mode should be efficient so that maximum energy is transmitted to the medium. The present invention achieves both these objects by surrounding the magnetic core of a plasmon antenna by a variable thickness plasmon generating layer, whose thinnest and shortest portion is at the ABS end of the TAMR head and whose thickest and longest portion efficiently couples to the optical mode of a waveguide to produce a plasmon.

公开(公告)号：US08134802B2

公开(公告)日：2012-03-13

申请号：US12589829

申请日：2009-10-29

申请人： Zhigang Bai ,  Yan Wu ,  Kenichi Takano

发明人： Zhigang Bai ,  Yan Wu ,  Kenichi Takano

IPC分类号： G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3967 ,  G11B2005/0005

摘要： A sloped reader is disclosed that reduces skew between reader and written transitions in shingled writing. The reader is formed between surfaces of S1 and S2 shields that are aligned parallel to the sloped reader. A PMR writer is described that straightens transition curvature and reduces signal-to-noise ratio in shingled writing. In one embodiment, a symmetrical writer with a bowed trailing edge where two corners have a greater pole height than a center portion may be used for either right corner or left corner shingled writing. In a second embodiment, an asymmetrical writer is formed with a straight and sloped trailing edge such that the write corner has a greater pole height than the opposite corner on the trailing edge. The bowed angle in the symmetrical writer and slope angle in the asymmetrical writer is between 5 and 45 degrees and preferably between 10 and 30 degrees.

摘要翻译： 公开了一种倾斜的读取器，其减少读写器与书写的转换之间的偏差。 读取器形成在平行于倾斜的读取器的S1和S2屏蔽的表面之间。 描述了一种PMR写入器，用于矫正转换曲率并降低带状写入中的信噪比。 在一个实施例中，具有弓形后缘的对称写入器，其中两个角具有比中心部分更大的极高度，可以用于右拐角或左角贴图写入。 在第二实施例中，非对称写入器形成为具有直的和倾斜的后缘，使得写入角具有比后缘上的相对角更大的极高度。 对称写入器中的弯曲角度和不对称写入器中的倾斜角度在5度到45度之间，最好在10度到30度之间。