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    • 2. 发明公开
    • Crossed-element magnetographic print head
    • 交叉元素磁印打印头
    • EP0288905A3
    • 1989-08-09
    • EP88106386.1
    • 1988-04-21
    • International Business Machines Corporation
    • Dove, Derek BrianKeefe, George EdwardYarmchuk, Edward John
    • B41J2/385B41J2/43
    • B41J2/43
    • A magnetographic printing head (26) comprises an array of crossed elongated bar-shaped print elements (58, 62) each of which is individually magnetizable by electrical conductors (40) wound about respective ones of the print elements (58, 62). The print elements (58, 62) are arranged in two parallel arrays which are spaced apart from each other to define a passage (24) through which a magnetic medium (22) is to be passed for the imprinting of marks (66) thereon. A mark (66) can be imprinted at each cross point (64) of the crossed arrays upon appli­cation of sufficient magnetizing current to each of the print elements (58, 62) at the cross point (64). The print elements (58, 62) are specifically shaped to pro­vide for concentration of magnetic fields at the cross points (64) in two dimensions to accomplish high resolu­tion printing. The concentration of the fields is accomplished in one embodiment of the invention by the use of a knife-edge (68) configuration to opposed facing surfaces of the elements of the opposed arrays, and in a second embodiment by a set of pedestals (72) upstanding from the elements of one of the arrays. The resulting configuration of the print head (26) has structural simplicity which permits economical fabrication while retaining high resolution in the printing.
    • 5. 发明公开
    • Miniature electronic device aligner using capacitance techniques
    • Kapazitiv arbeitende Miniatur-Justiervorrichtungfürelektronische Komponenten。
    • EP0507099A1
    • 1992-10-07
    • EP92103820.4
    • 1992-03-06
    • International Business Machines Corporation
    • Flint, Ephraim BemisYarmchuk, Edward John
    • G02B6/42H01L21/66
    • G01B7/31
    • A method and structure permit the precision alignment in the packaging of optical components (10), such as lasers, detectors, lenses and waveguides. The technique involves capacitance measurements of an array of plates placed on the optoelectronic device chip and its package substrate (12). The technique uses phase sensitive detection to sense the total current capacitively coupled into a passive plate (14) on the device chip (10) from two overlapping plates (16, 18) located on the package substrate. When the device chip (10) is properly aligned with respect to the package substrate (12), the summed current sensed with a third overlapping plate (22) on the package substrate is a null.
    • 一种方法和结构允许诸如激光器,检测器,透镜和波导的光学部件(10)的封装中的精密对准。 该技术涉及放置在光电子器件芯片及其封装衬底(12)上的板阵列的电容测量。 该技术使用相位敏感检测来从位于封装衬底上的两个重叠板(16,18)感测电容耦合到器件芯片(10)上的无源板(14)中的总电流。 当器件芯片(10)相对于封装衬底(12)正确对准时,用封装衬底上的第三重叠板(22)感测到的总和电流为零。
    • 7. 发明公开
    • Magnetic recording apparatus
    • Gerätzur magnetischen Aufnahme。
    • EP0097836A2
    • 1984-01-11
    • EP83105441.6
    • 1983-06-01
    • International Business Machines Corporation
    • Franaszek, Peter Anthony Watson Research CenterYarmchuk, Edward John
    • G11B5/00G03G19/00
    • B41J2/43G11B5/1272G11B5/17G11B5/488
    • The drawing diagrammatically illustrates the lay-out of a head array. The array comprises 64 sub-arrays, only sub-arrays B1 and B64 being shown. The sub-array 81 comprises 64 heads, each had being represented by two pole pieces, shows as square dots. 64 word lines (not shown) linkthe pole pieces, the first word line linking cores 63, 64; the second 61, 62; and the last cores 1, 2. A single bit line links the 64 cores in sub-array B1. The bit line is linked with odd numbered cores in one sense and with even numbered cores in the opposite sense. A pole piece is uniquely selected by energising the appropriate word line and then pulsing the bit line with a positive or negative pulse to select one or other of the two cores conditioned by the word line.
      The heads in each column are staggered in the x-direction so that when a recording is made by relative movement in the y-direction, the magnetic spot recorded by a head e.g. head 57 is contiguous with the magnetic spot recorded by the next consecutive head in the column. Further the magnetic spot recorded by the first head in each subsequent sub-array is contiguous with the magnetic spot recorded by the last head of the preceding sub-array.
    • 该图示意性地示出了头阵列的布置。 该阵列包括64个子阵列,仅示出了子阵列B1和B64。 子阵列B1包括64个头,每个头由两个极片表示,显示为方形点。 64字线(未示出)链接极片,第一字线连接芯63,64; 第61,62; 和最后的核心1,2,单个位线连接子阵列B1中的64个内核。 位线在一个意义上与奇数编号的核心相连,并且偶数编号的核心在相反的意义上。 通过激励适当的字线,然后用正脉冲或负脉冲脉冲位线来选择极片,以选择由字线调节的两个核心中的一个或另一个。 每列的磁头在x方向上交错排列,使得当通过在y方向上的相对运动进行记录时,由磁头记录的磁场,例如磁头。 磁头57与由列中的下一个连续的磁头记录的磁场相邻。 此外,由每个后续子阵列中的第一磁头记录的磁场与由前一子阵列的最后一个磁头记录的磁场相邻。
    • 9. 发明公开
    • Radial self-propagation pattern generation for disk file servowriting
    • 传播模式生成用于伺服信号记录径向自己的磁盘上
    • EP0715299A2
    • 1996-06-05
    • EP95118428.2
    • 1995-11-23
    • International Business Machines Corporation
    • Yarmchuk, Edward JohnSchultz, Mark D.Webb, Bucknell C.Chainer, Timothy Joseph
    • G11B5/00G11B5/55G11B5/48G11B5/58G11B5/596
    • G11B21/106G11B5/59633G11B5/59644G11B21/10
    • A method for writing patterns on a medium, especially self servowriting a rotating disk in a disk drive including a servo controlled actuator for positioning the head radially with respect to the disk, in which a position error signal equals a difference between a reference waveform and a measured relative position waveform derived from readback signals from the head interacting with the disk, including writing servo patterns on successive radial tracks of the disk using the actuator and deriving the reference waveform as a function of closed loop transfer function of the actuator and at least one measured position waveform. The frequency dependent gain of the servo loop may be set so that closed loop response of the servo loop has a magnitude less than unity at every integer multiple of disk rotation frequency, yet is high enough to provide substantial reduction of mechanical disturbances. Writing a series of first patterns along a track, displacing the head a known fraction of a track to a displaced position, and reading from selected ones of the first patterns position information for determining deviation information representative of deviation of the head from the known fraction, and using the deviation information to propagate second patterns at the displaced position with the deviation information encoded in the patterns. Spacing between adjacent tracks can be adjusted without writing the entire disk. Deviations in demodulated position signal arising from random placement errors in servo patterns may be cancelled. Apparatus for performing the methods and disk drives written by the method.
    • 一种用于在媒体上写入图形的方法,爱尤其自伺服磁盘驱动器中包括用于与相对于盘,其中一个位置误差信号等于一个基准波形和之间的差径向定位所述磁头的伺服控制激励器写入一​​个旋转磁盘 从头部与磁盘相互作用的回读信号,还包括在盘的连续径向磁道上使用致动器和导出基准波形作为致动器的闭环回路传输功能的函数和写入伺服图案中至少一种的测量的相对位置波形 测量的位置波形。 伺服回路的频率相关增益可以被设置为如此做了伺服回路的闭环回路响应具有比在磁盘旋转频率的每个整数倍单位更小的大小,但高到足以提供机械干扰的显着降低。 写一系列第一图案沿着轨道,轨道的已知部分移动所述头的位移位置,并从用于确定性采矿偏差代表头部的偏离已知分数信息的第一图案的位置信息选择的读取, 以及使用该偏差信息,以在与所述图案编码的信息偏差的偏移位置传播第二图案。 相邻轨道之间的间距可以不用写整个磁盘进行调整。 在从伺服模式的随机放置误差所产生的解调位置信号的偏差可能被取消。 装置,用于执行由所述方法写入方法和磁盘驱动器。