Method and system for reduction of off-track write errors in disk drives
    1.
    发明申请
    Method and system for reduction of off-track write errors in disk drives 失效
    用于减少磁盘驱动器中的非磁道写入错误的方法和系统

    公开(公告)号:US20070159716A1

    公开(公告)日:2007-07-12

    申请号:US11329679

    申请日:2006-01-10

    IPC分类号: G11B5/012

    CPC分类号: G11B5/40

    摘要: In an embodiment of the present invention, at least one mechanical fastener is used to mount a voice coil magnet assembly of a hard disk drive on a housing of the hard disk drive. A layer of a material having a low friction coefficient is disposed between the housing and the voice coil magnet assembly.

    摘要翻译: 在本发明的一个实施例中,至少一个机械紧固件用于将硬盘驱动器的音圈磁体组件安装在硬盘驱动器的壳体上。 具有低摩擦系数的材料层设置在壳体和音圈磁铁组件之间。

    Fe-cr-si based non-oriented electromagnetic steel sheet and process for producing the same
    3.
    发明申请
    Fe-cr-si based non-oriented electromagnetic steel sheet and process for producing the same 失效
    基于Fe-Cr-Si的无取向电磁钢板及其制造方法

    公开(公告)号:US20060048859A1

    公开(公告)日:2006-03-09

    申请号:US10538501

    申请日:2003-12-18

    IPC分类号: C23C8/66

    摘要: An Fe—Cr—Si based non-oriented electrical steel sheet contains 2.5% to 10% by mass of Si, 1.5% to 20% by mass of Cr, 0.006% by mass or less of C, 0.002% by mass or less of N, 0.005% by mass or less of S, 0.005% by mass or less of Ti, 0.005% by mass or less of Nb, and as necessary, 0.1% to 2% by mass of Al and at least one of 0.005% to 1% by mass of Sb and 0.005% to 1% by mass of Sn, and the balance being Fe and incidental impurities, wherein the electrical resistivity of the steel is 60 μΩcm or more, and the number of nitrides containing chromium per mm2 in the interior of the steel sheet is 2,500 or less. Consequently, the problem that high electrical resistance resulting from the high Si content and high Cr content is not satisfactorily utilized is advantageously solved, and it is possible to provide a non-oriented electrical steel sheet having excellent magnetic properties in the high-frequency range, in particular, in a frequency range of 1 kHz or more.

    摘要翻译: Fe-Cr-Si系非定向电工钢板含有2.5质量%〜10质量%的Si,Cr:1.5〜20质量%,C:0.006质量%以下,C:0.002质量% N,0.005质量%以下的S,0.005质量%以下的Ti,0.005质量%以下的Nb,根据需要,0.1质量%〜2质量%的Al和0.005质量%以下的至少一种 Sb为1质量%,Sn为0.005质量%〜1质量%,余量为Fe和偶然杂质,钢的电阻率为60微米以上,每毫米 2 在钢板内部2500以下。 因此,有利地解决了由高Si含量和高Cr含量导致的高电阻不能令人满意地解决的问题,并且可以提供在高频范围内具有优异磁性的无取向电工钢板, 特别是在1kHz以上的频率范围内。

    Microwave amplifier
    5.
    发明授权
    Microwave amplifier 失效
    微波放大器

    公开(公告)号:US5357212A

    公开(公告)日:1994-10-18

    申请号:US97906

    申请日:1993-07-28

    申请人: Masaki Kohno

    发明人: Masaki Kohno

    CPC分类号: H03F3/601 H01P5/028 H03F1/56

    摘要: A microwave amplifier includes input-side and output-side matching circuits disposed on the input side and output side of a microwave FET. Each of the matching circuits is a distributed constant circuit including microstrip lines disposed on a substrate of dielectric material. The input-side matching circuit includes a connecting section for connection to the FET. The connecting section comprises a first microstrip line having a first width equal to that of the input-side matching circuit, and a second microstrip line continuous and integral with the first microstrip line and having a second width smaller than the first width. The connecting section connects the input-side matching circuit to the input of the FET.

    摘要翻译: 微波放大器包括设置在微波FET的输入侧和输出侧的输入侧和输出侧匹配电路。 每个匹配电路是分布常数电路,包括设置在电介质材料的基板上的微带线。 输入侧匹配电路包括用于连接到FET的连接部分。 连接部分包括具有与输入侧匹配电路的第一宽度相等的第一宽度的第一微带线和与第一微带线连接并整体并且具有小于第一宽度的第二宽度的第二微带线。 连接部分将输入侧匹配电路连接到FET的输入端。

    Address offset feature for a hard disk drive
    7.
    发明授权
    Address offset feature for a hard disk drive 失效
    硬盘驱动器的地址偏移功能

    公开(公告)号:US06415383B1

    公开(公告)日:2002-07-02

    申请号:US09414301

    申请日:1999-10-06

    IPC分类号: G06F906

    CPC分类号: G06F9/441

    摘要: A method of changing the operating system in a computer system by using an address offset mode (AOM) feature for the address space of a hard disk drive connected to the computer system. Initialization of the computer loads the first operating system (OS) from a user area in the disk drive address space. An enable AOM command offsets the disk drive address space and reinitializes the computer to load a second OS from a reserve space in the disk drive address space. A command setting the maximum size of the address space of the hard disk drive provides a wrap around feature allowing the entire address space of the disk drive to be addressable for diagnostics or updating purposes. The computer is returned to operation with the first OS by a disable AOM command, or alternatively, by a power on reset, a software reset or a hardware reset. The method of changing operating systems is coded in the hard disk drive and does not require additions or modifications to the memory or the BIOS ROM of the computer system.

    摘要翻译: 通过使用连接到计算机系统的硬盘驱动器的地址空间的地址偏移模式(AOM)功能来改变计算机系统中的操作系统的方法。 计算机的初始化从磁盘驱动器地址空间的用户区域加载第一个操作系统(OS)。 启用AOM命令会偏移磁盘驱动器地址空间,并重新初始化计算机以从磁盘驱动器地址空间中的预留空间加载第二个OS。 设置硬盘驱动器的地址空间的最大大小的命令提供了一个环绕功能,允许磁盘驱动器的整个地址空间可寻址以进行诊断或更新。 计算机通过禁用AOM命令返回到第一个操作系统的操作,或者通过上电复位,软件复位或硬件复位返回到操作。 更改操作系统的方法在硬盘驱动器中进行编码,不需要对计算机系统的存储器或BIOS ROM进行添加或修改。

    Method for screening magnetic-recording heads
    8.
    发明授权
    Method for screening magnetic-recording heads 有权
    磁记录头的筛选方法

    公开(公告)号:US08174781B2

    公开(公告)日:2012-05-08

    申请号:US12115461

    申请日:2008-05-05

    IPC分类号: G11B5/455 G01R33/00

    CPC分类号: G11B20/22 G11B2220/2516

    摘要: A method for screening a magnetic-recording head utilizing a simulated-cross-track-gain profile of the magnetic-recording head to provide a manufacturing-qualified, magnetic-recording head. The method includes measuring a track profile of the magnetic-recording head, and providing the simulated-cross-track-gain profile of the magnetic-recording head synthesized utilizing the track profile of the magnetic-recording head. The method also includes calculating a peak-to-peak value of the simulated-cross-track-gain profile, and applying a selection criterion based on the peak-to-peak value of the simulated-cross-track-gain profile to screen the magnetic-recording head for use as the manufacturing-qualified, magnetic-recording head.

    摘要翻译: 一种利用磁记录头的模拟交叉轨道增益分布来屏蔽磁记录头的方法,以提供制造合格的磁记录头。 该方法包括测量磁记录头的轨道轮廓,并提供使用磁记录头的轨道轮廓合成的磁记录头的模拟交叉轨道增益分布。 该方法还包括计算模拟交叉轨道增益分布的峰 - 峰值,并且基于模拟交叉轨道增益分布的峰 - 峰值应用选择标准,以筛选 磁记录头用作制造合格的磁记录头。

    Semiconductor integrated circuit device
    9.
    发明申请
    Semiconductor integrated circuit device 审中-公开
    半导体集成电路器件

    公开(公告)号:US20050278596A1

    公开(公告)日:2005-12-15

    申请号:US11136454

    申请日:2005-05-25

    摘要: Components are provided including: an expected-value generating circuit that generates, upon reception of an output signal directed from the interface unit to the internal processing circuit; an expected-value signal for detecting an error in the output signal, a comparing and determining circuit that compares the output signal and the expected-value signal to determine whether these signals match with each other; and an output processing circuit that retains the determination result of the comparing and determining circuit and performs a process for externally outputting the determination result. In the case where a test pattern, which is an M-series pseudo-random-number signal, is input from a pulse generator or the like to the I/F unit for testing, a circuit based on a logic of generation of such an M-series pseudo-random-number signal is provided in the expected-value generating circuit.

    摘要翻译: 提供的部件包括:预期值产生电路,其在接收到从所述接口单元指向所述内部处理电路的输出信号时产生; 用于检测输出信号中的误差的预期值信号;比较和确定电路,比较输出信号和预期值信号,以确定这些信号是否彼此匹配; 以及输出处理电路,其保持比较和确定电路的确定结果,并执行用于从外部输出确定结果的处理。 在从脉冲发生器等输入作为M系列伪随机数信号的测试图案到用于测试的I / F单元的情况下,基于生成这种 在期望值发生电路中提供M系列伪随机数信号。

    Semiconductor laser device
    10.
    发明授权
    Semiconductor laser device 失效
    半导体激光器件

    公开(公告)号:US5018158A

    公开(公告)日:1991-05-21

    申请号:US472290

    申请日:1990-01-30

    摘要: A semiconductor laser device includes an n type first cladding layer and a multi quantum well active layer successively grown on an n type substrate, a p type second cladding layer having a stripe ridge narrower in the neighborhood of the laser cavity facets than within the laser disposed on the active layer, a p type buffer layer containing p type dopants in a higher concentration than in the second cladding layer and disposed on the second cladding layer except on the stripe ridge, an n type current blocking layer disposed on the buffer layer, and a p type contact layer disposed on an upper surface of the stripe ridge and the second cladding layer and the current blocking layer, the multi quantum well being disordered except directly opposite the wider portion of the stripe ridge by the diffusion of p type dopant impurities from the p type buffer layer.

    摘要翻译: 一种半导体激光器件包括在n型衬底上连续生长的n型第一覆层和多量子阱有源层,在激光器腔面附近具有窄于激光器内部的激光器的p型第二覆层, 所述有源层,ap型缓冲层包含比第二覆层更高浓度的p型掺杂剂,并且设置在除了条纹脊之外的第二覆层上,设置在缓冲层上的n型电流阻挡层和ap型 接触层,设置在条纹脊的上表面上,第二包覆层和电流阻挡层,多量子阱通过p型掺杂剂杂质从p型的扩散而除了与条纹脊的较宽部分直接相对之外是无序的 缓冲层。