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1. 发明授权

US09911913B1 Method of manufacturing piezoelectric microactuators having wrap-around electrodes 有权
公开(公告)号：US09911913B1
公开(公告)日：2018-03-06
申请号：US14316633
申请日：2014-06-26
申请人： Magnecomp Corporation
发明人： Peter Hahn , Kuen Chee Ee , Long Zhang
IPC分类号： H01L41/297 , B32B38/18 , G11B5/48 , H01L41/33 , B32B37/12
CPC分类号： H01L41/297 , B29C2793/0027 , B29C2793/0036 , B32B37/04 , B32B37/1207 , B32B37/1292 , B32B38/0036 , B32B38/10 , B32B38/185 , B32B2038/0076 , G11B5/48 , G11B5/483 , G11B5/4873 , G11B5/5552 , G11B5/56 , G11B21/10 , G11B21/106 , H01L41/33 , Y10T156/10 , Y10T156/1052
摘要： A method of manufacturing a piezoelectric microactuator having a wrap-around electrode includes forming a piezoelectric element having a large central electrode on a top face, and having a wrap-around electrode that includes the bottom face, two opposing ends of the device, and two opposing end portions of the top face. The device is then cut through the middle, separating the device into two separate piezoelectric microactuators each having a wrap-around electrode.

2. 发明申请

US20130019724A1 Method to fabricate a base plate for piezo actuation 有权
标题翻译：制造用于压电驱动的基板的方法
公开(公告)号：US20130019724A1
公开(公告)日：2013-01-24
申请号：US13186440
申请日：2011-07-19
申请人： David Django Dexter , Damon Douglas Brink , Ryan John Schmidt
发明人： David Django Dexter , Damon Douglas Brink , Ryan John Schmidt
IPC分类号： B26D7/00
CPC分类号： H01L41/22 , B21D28/10 , G11B5/4873 , G11B21/10 , H01L41/053 , Y10T83/0448
摘要： In certain embodiments, a method of fabricating a base plate for piezoelectric actuation, comprises providing a plate having a major surface; striking a first removable portion of the plate in a first direction substantially normal to the major surface to shear the first removable portion relative to the plate by a shear distance that is less than the plate thickness; striking the first removable portion in a second direction substantially opposite the first direction to reduce the shear distance by a reduction in shear that is less than the plate thickness; and leaving the first removable portion in place rather than removing the first removable portion. In other embodiments, the removable portion may be created by lancing one or more portions spanning at least one opening through a base plate adjacent a first side of at least one opening and adjacent a second side of the at least one opening.
摘要翻译：在某些实施例中，制造用于压电致动的基板的方法包括提供具有主表面的板; 在基本上垂直于主表面的第一方向上撞击板的第一可移除部分，以相对于板剪切第一可移除部分小于板厚度的剪切距离; 在与第一方向大致相反的第二方向上冲击第一可移除部分，以通过小于板厚的剪切力减小剪切距离; 并且将第一可移除部分留在原位，而不是移除第一可移除部分。在其他实施例中，可移除部分可以通过将穿过至少一个开口的至少一个开口的一个或多个部分穿过邻近至少一个开口的第一侧并邻近所述至少一个开口的第二侧穿过底板来产生。

3. 发明申请

US20040196053A1 Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences 失效
公开(公告)号：US20040196053A1
公开(公告)日：2004-10-07
申请号：US10824896
申请日：2004-04-15
申请人： Fujitsu Limited
发明人： Shuichi Hashimoto , Ryuki Kubohara , Tatsuhiko Kosugi , Takeyori Hara , Yoshiyuki Kagami
IPC分类号： G01V003/00 , G01R027/04
CPC分类号： G11B21/10
摘要： A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method comprises the measuring step of applying sine-wave oscillations at different frequencies one by one to the mechanism unit, and counting the number of times information reproduced upon application of each of the sine-wave oscillations differs from information indicating an aimed location, and the resonance-frequency determining step of determining the resonance frequency according to the number of times counted in the measuring step.

4. 发明授权

US06674605B1 PQ enhanced dual stage servo controller 失效
标题翻译： PQ增强型双级伺服控制器
公开(公告)号：US06674605B1
公开(公告)日：2004-01-06
申请号：US09553365
申请日：2000-04-20
申请人： Travis E. Ell
发明人： Travis E. Ell
IPC分类号： G11B5596
CPC分类号： G11B5/5552 , G11B21/083 , G11B21/10
摘要： A servo controller controls the servo system in a disc drive. A proportional integrator component receives the target track signal indicative of a target track and a measured track signal indicative of actual or measured data head position. During seek mode, the proportional integrator provides an output signal based on the measured track signal and the target track signal. A profile generator component provides a profile signal based on the output signal from the proportional integrator. A coarse actuator is driven based on the profile signal. A filter component is coupled to the profile generator and filters the profile signal to provide a filtered profile signal. The fine actuator is driven based on the filtered profile signal.
摘要翻译：伺服控制器控制磁盘驱动器中的伺服系统。比例积分器分量接收指示目标轨道的目标轨道信号和指示实际或测量数据头位置的测量轨迹信号。在寻道模式期间，比例积分器基于所测量的轨道信号和目标轨道信号提供输出信号。配置文件生成器组件基于比例积分器的输出信号提供配置文件信号。基于轮廓信号驱动粗略的致动器。滤波器组件耦合到简档生成器并对该简档信号进行滤波以提供滤波后的分布信号。基于滤波的轮廓信号驱动精细致动器。

5. 发明申请

US20030057935A1 Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences 失效
标题翻译：谐振频率测量方法通过对偏离轨迹发生次数进行计数来确定谐振频率
公开(公告)号：US20030057935A1
公开(公告)日：2003-03-27
申请号：US10056865
申请日：2002-01-25
申请人： FUJITSU LIMITED
发明人： Susumu Yoshida , Shuichi Hashimoto , Ryuki Kubohara , Tatsuhiko Kosugi , Takeyori Hara , Yoshiyuki Kagami
IPC分类号： G01R023/00 , G01R023/08
CPC分类号： G11B21/10
摘要： A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method comprises the measuring step of applying sine-wave oscillations at different frequencies one by one to the mechanism unit, and counting the number of times information reproduced upon application of each of the sine-wave oscillations differs from information indicating an aimed location, and the resonance-frequency determining step of determining the resonance frequency according to the number of times counted in the measuring step.
摘要翻译：谐振频率测量方法用于通过驱动机构单元来测量记录在介质上的信息记录/再现装置再现信息的共振频率。谐振频率测量方法包括测量步骤，将不同频率的正弦波振荡逐个地施加到机构单元，并且计数在应用每个正弦波振荡时再现的信息的数量不同于指示以及谐振频率确定步骤，用于根据在测量步骤中计数的次数来确定谐振频率。

6. 发明授权

US06469859B1 Method and system for accurate self-servowriting with normalization in a disk drive 失效
标题翻译：用于在磁盘驱动器中进行标准化的精确自伺服驱动的方法和系统
公开(公告)号：US06469859B1
公开(公告)日：2002-10-22
申请号：US09198730
申请日：1998-11-24
申请人： Timothy Chainer , Mark Delorman Schultz , Bucknell Chapman Webb , Edward John Yarmchuk
发明人： Timothy Chainer , Mark Delorman Schultz , Bucknell Chapman Webb , Edward John Yarmchuk
IPC分类号： G11B2102
CPC分类号： G11B21/08 , G11B5/5534 , G11B5/58 , G11B5/584 , G11B5/59633 , G11B21/10
摘要： An accurate and time-efficient method and system for self-servowriting wherein at least one reference value used to position the transducer is updated for some, but not all, of the tracks to be written. The reference value(s) is dependent upon a predefined indicium of transducer position, such as the amplitude of the readback signal obtained from a written track when the transducer is positioned on the track. In a first embodiment, updating of the reference value(s) is performed at every Nth track written, where N is a fixed number or range of numbers determined by an expected track-to-track variation of the indicium. The servowriting system may be designed to dynamically increase or decrease N during servowriting in response to actual variations in the indicium. According to a second embodiment, updating is only performed when needed, e.g. when the variation of the measured indicium between two written tracks (not necessarily adjacent tracks) exceeds a predefined threshold value. For systems employing dual-element heads, servowriting accuracy is enhanced by performing a read head adjustment prior to updating of the reference values.
摘要翻译：一种用于自伺服驱动的精确和时间有效的方法和系统，其中用于定位换能器的至少一个参考值针对要写入的轨道的一些但不是全部更新。参考值取决于换能器位置的预定义标记，例如当换能器位于轨道上时从写入轨迹获得的回读信号的幅度。在第一实施例中，在写入的每第N个磁道中执行参考值的更新，其中N是由标记的期望的轨迹到轨道变化确定的固定数量或数量范围。伺服驱动系统可以被设计为在伺服驱动期间响应于标记中的实际变化动态地增加或减小N。根据第二实施例，仅在需要时执行更新，例如，当两个写入的轨道（不一定是相邻轨道）之间的测量标记的变化超过预定义的阈值时。对于采用双元件头的系统，通过在更新参考值之前执行读取头调整来提高伺服精度。

7. 发明授权

US06418097B1 Analog to digital converter assembly for normalizing servo error signals and multiplexing reference voltage inputs and digital outputs and improved optical drive system including same 失效
标题翻译：模数转换器组件，用于归一化伺服误差信号和复用参考电压输入和数字输出以及包括其的改进的光驱系统
公开(公告)号：US06418097B1
公开(公告)日：2002-07-09
申请号：US08476527
申请日：1995-06-07
申请人： David L. Schell , Randolph Scott Crupper , Kurt W. Getreuer , Leonardus I. Grassens , David E. Lewis , Marvin B. Davis
发明人： David L. Schell , Randolph Scott Crupper , Kurt W. Getreuer , Leonardus I. Grassens , David E. Lewis , Marvin B. Davis
IPC分类号： G11B700
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： An analog to digital circuit assembly includes a circuit for multiplexing a reference voltage input of an analog to digital converter to produce alternating normalized and referenced digital outputs of an analog signal input at a rate controlled by a sampling clock which includes a switch including first and second inputs, an output, and a control input for alternately connecting the first and the second inputs to the output, the output being applied to the reference voltage input. An information detection device having a detection output and a servo mechanism that controls operations on detected information is provided in conjunction with a signal summing circuit, a direct current voltage reference, a control clock connected, a servo error signal circuit having a servo error signal output and input, a sampling clock, and a processing circuit having an input connected to a digital output of the analog to digital converter and an output for controlling the servo mechanism. The analog to digital circuit assembly is also implemented in an optical disc system for improved operation thereof.
摘要翻译：模数电路组件包括用于多路复用模数转换器的参考电压输入的电路，以产生由采样时钟控制的速率的模拟信号输入的交替归一化和参考的数字输出，该采样时钟包括开关，该开关包括第一和第二输入，输出和用于交替地将第一和第二输入连接到输出的控制输入，输出被施加到参考电压输入。具有检测输出的信息检测装置和控制对检测信息的操作的伺服机构结合信号求和电路，直流电压基准，连接的控制时钟，具有伺服误差信号输出的伺服误差信号电路并输入采样时钟和具有连接到模数转换器的数字输出的输入端的处理电路和用于控制伺服机构的输出。模拟数字电路组件也在光盘系统中实现，以改进其操作。

8. 发明授权

US06347018B1 Digital servo control system for use in disk drives 失效
标题翻译：用于磁盘驱动器的数字伺服控制系统
公开(公告)号：US06347018B1
公开(公告)日：2002-02-12
申请号：US09303597
申请日：1999-05-03
申请人： Ronald James Kadlec , Thomas James Frederick , Paul Henry Kelley , Philip Saxton Weilbacher
发明人： Ronald James Kadlec , Thomas James Frederick , Paul Henry Kelley , Philip Saxton Weilbacher
IPC分类号： G11B5596
CPC分类号： G11B5/59622 , G11B5/5534 , G11B5/5547 , G11B5/59616 , G11B5/5965 , G11B21/081 , G11B21/085 , G11B21/10
摘要： A digital servo control system for disk drives is an “embedded” system—one in which servo control information is embedded on the same disk surface as the user data. In contrast to known embedded-servo systems in which a space-consuming series of many dibit pairs is present, the present system provides only a single dibit pair in a fractional positional error (PESF) area. Thus, the disk drive's read head encounters only a single dibit pair per sample period (or per data sector), thus saving valuable disk space that may be used for user data. Various pre-processing methods may be provided so as to pre-process the measurement derived from the single dibit pair per sample period (or data sector), so as to compensate for non-ideal characteristics of the dibit measurement. The system thus provides an accurate and robust servo control system, while sacrificing a minimum amount of valuable disk space to the servo information field.
摘要翻译：用于磁盘驱动器的数字伺服控制系统是一种“嵌入式”系统，其中伺服控制信息嵌入与用户数据相同的磁盘表面上。与众所周知的嵌入式伺服系统相比，其中存在许多双数对的空间消耗系列，本系统在分数位置误差（PESF）区域中仅提供单个双位对。因此，磁盘驱动器的读取头在每个采样周期（或每个数据扇区）仅遇到单个双位对，从而节省了可用于用户数据的宝贵磁盘空间。可以提供各种预处理方法，以便对每个采样周期（或数据扇区）从单个双位对导出的测量进行预处理，以补偿双位测量的非理想特性。因此，该系统提供了精确和鲁棒的伺服控制系统，同时牺牲了伺服信息领域的最小量的有价值的磁盘空间。

9. 发明授权

US06249399B1 Methods and systems for self-servowriting including maintaining a reference level within a useable dynamic range 失效
标题翻译：用于自伺服驱动的方法和系统，包括将参考电平维持在可用的动态范围内
公开(公告)号：US06249399B1
公开(公告)日：2001-06-19
申请号：US09416289
申请日：1999-10-14
申请人： Timothy Joseph Chainer , Mark Delorman Schultz , Bucknell Chapman Webb , Edward John Yarmchuk
发明人： Timothy Joseph Chainer , Mark Delorman Schultz , Bucknell Chapman Webb , Edward John Yarmchuk
IPC分类号： G11B2102
CPC分类号： G11B5/5534 , G01N21/03 , G01N21/31 , G11B5/4886 , G11B5/59627 , G11B5/59633 , G11B5/59644 , G11B5/59655 , G11B5/59688 , G11B21/081 , G11B21/083 , G11B21/085 , G11B21/10 , G11B21/106 , G11B27/3027
摘要： Methods and systems for self-servowriting a data storage medium are disclosed, including servoing to propagation bursts of a propagation pattern located in tracks other than an immediately preceding track. Reference levels used to position a recording head are accordingly kept in a usable dynamic range necessary to keep servo track spacing constant across the medium. The methods and systems are disclosed in connection with a rotary actuator having spaced read and write heads. Similar methods are disclosed for writing trigger or timing bursts of the propagation pattern.
摘要翻译：公开了一种用于自伺服驱动数据存储介质的方法和系统，包括伺服到位于紧邻在前的轨道之外的轨道中的传播模式的传播脉冲串。因此，用于定位记录头的参考电平保持在维持伺服磁道间隔在介质上不变的必要动态范围。结合具有间隔读写头的旋转致动器公开了这些方法和系统。公开了用于写入传播模式的触发或定时脉冲串的类似方法。

10. 发明授权

US6130799A Signal recording and/or reproducing apparatus, method, and medium with pilot signal and tracking servo signal recorded at different azimuth angles 失效
标题翻译：具有以不同方位角记录的导频信号和跟踪伺服信号的信号记录和/或再现装置，方法和介质
公开(公告)号：US6130799A
公开(公告)日：2000-10-10
申请号：US999539
申请日：1998-01-14
申请人： Tsuguo Sato
发明人： Tsuguo Sato
IPC分类号： G11B5/588 , G11B5/008 , G11B5/584 , G11B15/087 , G11B15/12 , G11B15/467 , G11B21/10
CPC分类号： G11B5/584 , G11B15/4677 , G11B21/10 , G11B21/103 , G11B15/125 , G11B5/0086
摘要： A method and apparatus for recording and/or reproducing signal on or from a recording medium, wherein correct tracking servo signals may be produced so that tracking errors may be detected correctly. The pilot signal from a recording amplifier 3, produced by frequency-dividing system clocks by a frequency divider 2, is recorded on the recording medium by a servo head 21 at the timing of a timing signal GP.sub.1. A tracking servo signal, obtained by reproducing the pilot signal by a recording/reproducing head 22, delaying the resulting signal by a delay circuit 4 and phase-shifting the resulting delayed signal by a phase shifting unit 5, is recorded at the timing of a timing signal GP.sub.2. The pilot signal and the tracking servo signal are reproduced by the recording/reproducing head 22 and the pilot signal is delayed by the delay circuit 4. An XOR circuit 11 takes an XOR between the reproduced tracking servo signal and the delayed pilot signal and the resulting signal of the XOR circuit is sampled and held by a sampling hold circuit 13 for detecting a servo error signal D.sub.o.
摘要翻译：一种用于在记录介质上记录和/或再现信号的方法和装置，其中可以产生正确的跟踪伺服信号，从而可以正确检测跟踪误差。来自记录放大器3的由分频器2分频系统时钟产生的导频信号在定时信号GP1的定时由伺服头21记录在记录介质上。通过由记录/再现头22再现导频信号获得的跟踪伺服信号，通过延迟电路4延迟所得到的信号并由相移单元5对所得到的延迟信号进行相移，在定时信号GP2。导频信号和跟踪伺服信号由记录/再现头22再现，并且导频信号被延迟电路4延迟。异或电路11在再现的跟踪伺服信号和延迟的导频信号之间取XOR，并产生 XOR电路的信号被采样保持电路13采样并保持，用于检测伺服误差信号Do。

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