公开(公告)号：US06724575B1

公开(公告)日：2004-04-20

申请号：US09713963

申请日：2000-11-15

Applicant: Eunkyu Jang

Inventor： Eunkyu Jang

IPC: G11B548

CPC classification number: H05K1/0237 ,  G11B5/4853 ,  H05K1/0254 ,  H05K1/056 ,  H05K2201/098

Abstract: The present invention is a method and apparatus for providing an electrical substrate. The electrical substrate comprises a dielectric layer; and a first conductive layer attached to the dielectric layer, in which the first conductive layer has an elliptical cross-section. The electrical substrate may be used in a flexible circuit that connects the read/write head to electronic circuitry in a hard disk drive.

Abstract translation: 本发明是提供电气基板的方法和装置。 电气基板包括电介质层; 以及附着到电介质层的第一导电层，其中第一导电层具有椭圆形截面。 电气基板可以用于将读/写头连接到硬盘驱动器中的电子电路的柔性电路中。

公开(公告)号：US20090251823A1

公开(公告)日：2009-10-08

申请号：US12080640

申请日：2008-04-03

Applicant: Eunkyu Jang

Inventor： Eunkyu Jang

IPC: G11B5/60 ,  G11B5/33

CPC classification number: G11B5/6064 ,  G11B5/3133 ,  G11B5/4853 ,  G11B5/6005 ,  G11B2005/0005

Abstract: A write circuit and a head for a hard disk drive. The head includes a substrate that has an electrical ground and a write element that has a center tap. The head also has a resistor that is connected to the center tap and the electrical ground. The resistor provides a return path for AC and DC components of any common mode signal in a write circuit. The resistor can also generate heat that thermally expands the head and varies a head flying height. The write element is connected to an write driver circuit that provides in phase currents to a write element during the write operation and out of phase currents during a read operation. The out of phase currents allow for thermal expansion and flying height control even during a read operation.

Abstract translation: 写电路和硬盘驱动器的磁头。 头包括具有电接地的基板和具有中心抽头的写入元件。 磁头还具有连接到中心抽头和电气接地的电阻器。 电阻为写入电路中的任何共模信号的AC和DC分量提供返回路径。 电阻器还可以产生热量，使热量膨胀头部并改变头部飞行高度。 写入元件连接到写入驱动器电路，其在读取操作期间在写入操作期间向写入元件提供相电流，并且在读取操作期间提供异相电流。 即使在读取操作期间，异相电流也允许热膨胀和飞行高度控制。

公开(公告)号：US20090153995A1

公开(公告)日：2009-06-18

申请号：US12001885

申请日：2007-12-12

Applicant: Eunkyu Jang

Inventor： Eunkyu Jang

IPC: G11B27/36

CPC classification number: G11B5/455 ,  G11B2005/0018 ,  G11B2220/2516

Abstract: A method for determining whether a magneto-resistive head of a hard disk drive is defective for having an undesirable break down voltage. The method includes applying a voltage to a heater element of a magneto-resistive head and measuring a write element resistance and a read element resistance. A temperature coefficient of resistance for the read element is determined from the measured read and write element resistances. The head is considered defective if the temperature coefficient exceeds a threshold.

Abstract translation: 用于确定硬盘驱动器的磁阻头是否有缺陷以具有不期望的击穿电压的方法。 该方法包括将电压施加到磁阻头的加热元件并测量写元件电阻和读元件电阻。 从测量的读和写元件电阻确定读取元件的电阻的温度系数。 如果温度系数超过阈值，则头部被认为是有缺陷的。

公开(公告)号：US20050135011A1

公开(公告)日：2005-06-23

申请号：US10750638

申请日：2003-12-19

Applicant: Eunkyu Jang ,  Hyung Lee

Inventor： Eunkyu Jang ,  Hyung Lee

IPC: G11B5/60 ,  G11B5/48 ,  G11B21/21 ,  G11B15/64 ,  G11B17/32 ,  G11B21/20

CPC classification number: G11B5/4853

Abstract: An interconnect that may reduce a head slider's exposure to electrostatic discharge events and may dissipate charging of the head is provided. Conductive and nonconductive adhesives are used to adhere a head slider to the interconnect. An electromagnetic interference generating circuit generates current that flows through the conductive adhesive bonding the head slider to the flexure arm. The electromagnetic interference current breaks down the resistance of the conductive adhesive to dissipate an electrostatic voltage charge on the head slider. This may prolong the life of the head slider and a read/write head coupled to the head slider.

Abstract translation: 提供可以减少磁头滑块暴露于静电放电事件并且可能耗散磁头的充电的互连。 导电和非导电粘合剂用于将磁头滑块粘附到互连。 电磁干扰发生电路产生流过导电粘合剂的电流，将导磁头滑块接合到挠曲臂。 电磁干扰电流会破坏导电胶的电阻，从而消除磁头滑块上的静电电荷。 这可能延长磁头滑动器的寿命和耦合到磁头滑块的读/写头。

公开(公告)号：US08040632B2

公开(公告)日：2011-10-18

申请号：US12001886

申请日：2007-12-12

Applicant: Eunkyu Jang

Inventor： Eunkyu Jang

IPC: G11B5/127 ,  G11B5/11 ,  G11B5/39

CPC classification number: G11B5/3912 ,  G11B5/3133 ,  G11B5/3967 ,  G11B5/40 ,  G11B5/6064

Abstract: A head for a hard disk drive. The head includes a substrate, a write element, a read element and a heater element. The head also includes a buffer layer between the read element and the substrate, and a first resistor connected to the heater element and the buffer layer. The buffer layer and resistor create an impedance that suppresses noise introduced to the head from the disk of the drive.

Abstract translation: 一个硬盘驱动器的头。 头部包括基板，写入元件，读取元件和加热器元件。 头部还包括在读取元件和衬底之间的缓冲层，以及连接到加热器元件和缓冲层的第一电阻器。 缓冲层和电阻器产生阻止从驱动器的盘引入到头部的噪声的阻抗。

公开(公告)号：US20090154028A1

公开(公告)日：2009-06-18

申请号：US12001886

申请日：2007-12-12

Applicant: Eunkyu Jang

Inventor： Eunkyu Jang

IPC: G11B5/33

CPC classification number: G11B5/3912 ,  G11B5/3133 ,  G11B5/3967 ,  G11B5/40 ,  G11B5/6064

Abstract: A head for a hard disk drive. The head includes a substrate, a write element, a read element and a heater element. The head also includes a buffer layer between the read element and the substrate, and a first resistor connected to the heater element and the buffer layer. The buffer layer and resistor create an impedance that suppresses noise introduced to the head from the disk of the drive.

Abstract translation: 一个硬盘驱动器的头。 头部包括基板，写入元件，读取元件和加热器元件。 头部还包括在读取元件和衬底之间的缓冲层，以及连接到加热器元件和缓冲层的第一电阻器。 缓冲层和电阻器产生阻止从驱动器的盘引入到头部的噪声的阻抗。

公开(公告)号：US20090002888A1

公开(公告)日：2009-01-01

申请号：US11824037

申请日：2007-06-29

Applicant: Eunkyu Jang

Inventor： Eunkyu Jang

IPC: G11B5/53

CPC classification number: G11B5/4853

Abstract: A printed circuit that connects a head to a pre-amplifier circuit of a hard disk drive. The head has a pair of write bond pads and a pair of read bond pads. The printed circuit has a pair of read traces located in a first layer and connected to the read bond pads. The printed circuit also has a pair of write traces that are located in a second layer and connected to the write bond pads. The write traces cross with the read traces so that a head fabricated from a single head wafer can be used as a Up head in a hard disk drive.

Abstract translation: 将头连接到硬盘驱动器的前置放大器电路的印刷电路。 头部具有一对写接合焊盘和一对读接合焊盘。 印刷电路具有位于第一层中并连接到读接合焊盘的一对读取迹线。 印刷电路还具有位于第二层中并连接到写接合焊盘的一对写入迹线。 写入迹线与读取的迹线交叉，使得由单个磁头晶片制造的磁头可以用作硬盘驱动器中的Up磁头。

公开(公告)号：US08085509B2

公开(公告)日：2011-12-27

申请号：US12080640

申请日：2008-04-03

Applicant: Eunkyu Jang

Inventor： Eunkyu Jang

IPC: G11B5/147 ,  G11B5/17

CPC classification number: G11B5/6064 ,  G11B5/3133 ,  G11B5/4853 ,  G11B5/6005 ,  G11B2005/0005

Abstract: A write circuit and a head for a hard disk drive. The head includes a substrate that has an electrical ground and a write element that has a center tap. The head also has a resistor that is connected to the center tap and the electrical ground. The resistor provides a return path for AC and DC components of any common mode signal in a write circuit. The resistor can also generate heat that thermally expands the head and varies a head flying height. The write element is connected to an write driver circuit that provides in phase currents to a write element during the write operation and out of phase currents during a read operation. The out of phase currents allow for thermal expansion and flying height control even during a read operation.

Abstract translation: 写电路和硬盘驱动器的磁头。 头包括具有电接地的基板和具有中心抽头的写入元件。 磁头还具有连接到中心抽头和电气接地的电阻器。 电阻为写入电路中的任何共模信号的AC和DC分量提供返回路径。 电阻器还可以产生热量，使热量膨胀头部并改变头部飞行高度。 写入元件连接到写入驱动器电路，其在读取操作期间在写入操作期间向写入元件提供相电流，并且在读取操作期间提供异相电流。 即使在读取操作期间，异相电流也允许热膨胀和飞行高度控制。

公开(公告)号：US07881015B2

公开(公告)日：2011-02-01

申请号：US11824037

申请日：2007-06-29

Applicant: Eunkyu Jang

Inventor： Eunkyu Jang

IPC: G11B5/48

CPC classification number: G11B5/4853

Abstract: A printed circuit that connects a head to a pre-amplifier circuit of a hard disk drive. The head has a pair of write bond pads and a pair of read bond pads. The printed circuit has a pair of read traces located in a first layer and connected to the read bond pads. The printed circuit also has a pair of write traces that are located in a second layer and connected to the write bond pads. The write traces cross with the read traces so that a head fabricated from a single head wafer can be used as a Up head in a hard disk drive.

Abstract translation: 将头连接到硬盘驱动器的前置放大器电路的印刷电路。 头部具有一对写接合焊盘和一对读接合焊盘。 印刷电路具有位于第一层中并连接到读接合焊盘的一对读取迹线。 印刷电路还具有位于第二层中并连接到写接合焊盘的一对写入迹线。 写入迹线与读取的迹线交叉，使得由单个磁头晶片制造的磁头可以用作硬盘驱动器中的Up磁头。

公开(公告)号：US20090128944A1

公开(公告)日：2009-05-21

申请号：US11986367

申请日：2007-11-20

Applicant: Eunkyu Jang ,  Kiseok Moon

Inventor： Eunkyu Jang ,  Kiseok Moon

IPC: G11B5/09

CPC classification number: G11B5/41 ,  G11B5/40 ,  G11B5/6064 ,  G11B5/607 ,  G11B20/18 ,  G11B2005/001 ,  G11B2220/2516

Abstract: A hard disk drive that includes a head coupled to a disk. The head has a heater element. The drive also includes a controller that causes the heater element to heat the head to a temperature sufficient to anneal material within the head. The head is heated to a temperature sufficient to cause oxidation of any metal, such as aluminum, within the head, and/or oxygen redistribution and homogenization in the barrier. This heating process preferably occurs while the drive is not writing or reading data and the head is off disk.

Abstract translation: 包括耦合到磁盘的磁头的硬盘驱动器。 头部有一个加热元件。 该驱动器还包括一个控制器，该控制器使加热器元件将头部加热到足以退火头内的材料的温度。 将头部加热到足以使头部内的任何金属（例如铝）氧化的温度和/或屏障中的氧再分布和均质化。 该加热过程优选地在驱动器不写入或读取数据并且磁头脱离磁盘的情况下发生。