CN1052567A - 磁盘记录系统 - Google Patents

磁盘记录系统 Download PDF

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CN1052567A
CN1052567A CN90110143A CN90110143A CN1052567A CN 1052567 A CN1052567 A CN 1052567A CN 90110143 A CN90110143 A CN 90110143A CN 90110143 A CN90110143 A CN 90110143A CN 1052567 A CN1052567 A CN 1052567A
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slide block
leading end
side rails
air
width
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CN1017840B (zh
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代温德拉·辛夫·查哈巴拉
代恩·莱万
亨利·舒塞·尼什西拉
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Maxell Digital Products China Co Ltd
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International Business Machines Corp
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00Head arrangements not specific to the method of recording or reproducing
    • G11B21/16Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/20Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
    • G11B21/21Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005Specially adapted for spacing from a rotating disc using a fluid cushion
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12493Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component

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  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

一种支承磁传感器的空气支承滑块,包括一对在 滑块的空气支承表面两侧的共面侧导轨以及沿空气 支承表面中间区域的一条中间导轨,导轨之间是从滑 块的引导端一直延伸至尾随端的凹槽,所有导轨在其 引导端都有一斜坡段。侧导轨的宽度不超过其引导 端的宽度,侧导轨向滑块尾随端延伸,但并不达到滑 块尾端。中间导轨的宽度在引导端小,而在滑块尾随 端最大,传感器就安装在尾随端。

Description

本发明涉及一种磁头滑块(slider)部件,特别是一种产生空气支承、以便在磁头和记录表面之间保持狭窄间隙的磁头滑块。
在磁介质上“飞行”的磁头部件已经得到了广泛的应用。这些部件在磁传感器和磁记录介质,例如旋转的磁盘,之间提供了一种非接触式的传感关系。这样在传感器和磁盘之间保持了稳定不变的间隙。在磁记录技术中,需要不断地改进能够记录和可靠地读出信息的面密度,这就导致了提高沿磁道的位密度和变窄磁道宽度的趋势。更高的位密度需要使传感间隙不断变窄,于是,使磁头的低“飞行”高度保持稳定,同时能以更高的数据记录和读出速率可靠地记录和读出数据就变得更困难了。
已知有三轨式滑块,如三轨带斜坡的平板式滑块,示于授予沃纳(Warner)的美国专利No.3,823,416中。在沃纳滑块中,所有三条导轨从头至尾都宽度不变,并且在滑块的引导端,每条导轨都有一个斜坡段。在滑块的尾随端,由对准中间的导轨的磁心构成磁传感器。
授予利文(Levan)等人的美国专利No.4,555,739描述了一种三轨式滑块,其中三条导轨在滑块的引导端由一横轨联接起来,并且该横轨有一引导的斜坡段,后部有凹槽,一直延伸至滑块的尾随端。三条导轨的每一条其宽度在滑块尾随端处比在横轨处要窄。传感器安装在中间导轨的尾随端。
日本专利申请公开第54-8514号揭示了一种三轨式滑块,其中三条导轨从头至尾都宽度不变。两条侧轨与滑块的纵向中心线成一角度θ,其值大约为15°,传感器安装在靠近中间导轨的一端。
日本专利申请公开第61-170922号揭示了一种三轨式滑块,其中三条导轨从头至尾都宽度不变。在滑块的引导端和尾随端,每条导轨都有一斜坡段。滑块尾随端附近,所有三条导轨的斜坡段中都有一个小台阶,以减小沉积在滑块尾随端灰尘。
双轨带斜坡的平板式滑块最近得到了越来越多的应用,较近的一个实例可见于授予Nishihira的美国专利No.4,734,803中。这种滑块具有两条侧导轨,其在滑块的引导端较宽,并且导轨一直延伸至滑块的装有磁传感器的尾随端,斜坡段在滑块的引导端,两条侧轨间的区域从滑块的引导端一直到尾随端都是敞开的。
1985年11月的检索报告(RESEARCH  DISCLOSURE)示出的未署名出版物第25946号中的第259号揭示了一种磁头滑块,其侧导轨由滑块引导端的一条前轨连接,以形成一个产生负压的凹槽部分。侧导轨并不一直延伸至滑块的尾随端,磁传感器安装在滑块尾随端中心处的一个岛状区域上。
先有技术中所设计的滑块最适用于采用大磁盘的磁盘存储器,其中的传感器也较大。对于采用较小磁盘的磁盘存储器而言,就需要减小滑块的尺寸,以便通过增加数据区而使每个磁盘具有更大的数据容量。而在现有技术文献中还没有涉及到在设计较小滑块时所面临的这些难题。
本发明的主要目的是提供一种空气支承滑块,它能产生一压力分布,使得在尺寸减小的情况下,滑块相对于运动的磁介质能以选定的飞行高度及所需的俯仰角“飞行”。
根据本发明,空气支承滑块用来支承一传感器,该滑块包括一对基本上共面的、沿空气支承面(ABS)侧边的侧轨,以及一条沿滑块ABS中心区域的中间导轨。以便在导轨之间形成凹槽,这些凹槽从滑块的引导端一直延伸至尾随端。所有导轨在其引导端都有一斜坡段。侧轨的宽度基本上不超过其引导端处的宽度,并且侧轨向滑块尾端延伸,但不达到该滑块尾随端。中间导轨在滑块引导端的宽度窄,在支撑有传感器的滑块尾随端的宽度最大。
这种空气支承滑块结构产生一种组合压力分布,使得滑块相对于运动的磁介质,例如磁盘,在引导端能以所需的俯仰角度“飞行”,并且滑块和磁介质之间的间隙在中心导轨的尾随端(上面安装磁传感器)最小。这种空气支承滑块结构具有足够稳定的俯仰角,因此它可以用于小尺寸的情形。
在一个具体实施例中,滑块具有侧导轨,其在滑块的引导端具有第一预定宽度以及延伸至一扩张段的基本上平行的侧边。扩张段在中断点结束,在该中断点,侧轨具有比第一预定宽度窄的第二预定宽度度。并且侧轨具有基本平行的、从中断点一直延伸至侧轨尾随端的边。
从以下对本发明的最佳实施例(示于附图中)进行更为具体的描述,本发明的前述及其它目的、特点及优点会变得很清楚。
图1是一种磁盘存储系统的示意性透视图;
图2是体现本发明的一种空气支承滑块的底部平面图;
图3是体现本发明的另一种空气支承滑块的底部平面图;
图4是体现本发明的第三种空气支承滑块的底部平面图;
图5表示了图2所示的滑块的尾随端;
图6是图2、3和4所示滑块的侧视图。
参照图1,一磁盘存储系统包括一个磁头臂17,以及安装在磁头臂17上的至少一个磁头悬置部件。在所示实施例中,有一个磁头悬置部件13安装在磁头臂17的顶部,而另一个磁头悬置部件13安装在磁头臂17的底部。每个悬置部件在其端部都支撑一个磁头滑块10,每个磁头滑块10都有一个或多个通常称之为磁头的磁传感器装置,磁传感装置的安放位置使传感间隙能与磁盘21的表面成传感关系,图中只画出了一张磁盘。从磁头取出的电信号送至主系统,以供主系统使用。磁头臂17安装到一个普通致动器19上,例如一个音圈电机,用以使磁头达到磁盘21上的不同磁道。
本发明的滑块10最好是一种小型滑块,因为减小滑块尺寸具有很多优点,例如价格低、组装效率高以及性能好等。然而,由于滑块尺寸减小了,由制造公差所引起的“飞行”高度的公差也会加大。使得“飞行”高度公差加大的最重要的原因是来自俯仰摆动参数和左右摆动参数。例如,当滑块的宽度减小一半,左右摆动敏感参数对“飞行”高度的影响大约要加倍;当滑块的长度减小一半,俯仰摆动敏感参数对“飞行”高度的影响大约要增加五倍。小型滑块设计的目的是使滑块尺寸在长宽两个方向上大约减小至现行尺寸的一半。本发明则提供了一种设计,它能在应用小尺寸滑块时,在保持预定的“飞行”高度公差方面具有极好的性能。
参照附图,根据本发明制造的磁头滑块10的空气支承面(ABS)有两条侧导轨12和14以及一条中间导轨16。侧导轨12和14的内侧以及中间导轨16的两侧都与凹槽18交界,凹槽是通过例如刻蚀、离子研磨(ion  milling)或其它加工技术形成的。凹槽18从滑块的引导端20一直延伸至滑块的尾随端22。磁传感器24(最好是薄膜型的),联接在中间导轨的尾随端,其传感间隙与导轨表面齐平。侧导轨12和14以及中间导轨16在其引导端都有斜坡高出段11。
侧导轨12和14在滑块的引导端20处最宽,它们向滑块尾随端延伸,但并不达到滑块尾随端。侧导轨长度与滑块的长度之比小于0.9,最好在0.5至0.8之间,在图2和图3所示的实施例中,侧导轨的尾随端比引导端要窄。在图4所示的实施例中,侧导轨的宽度从头至尾都是相同的。其它形状的侧导轨只要它们在滑块的引导端20保持相对高的压力,而在滑块的中间部分保持相对低的压力,则也是可行的。
在图2所示的本发明的最佳实施例中,每条侧导轨在滑块的引导端20处都有宽的部分26和28,它们的边基本平行,侧导轨还包括扩张段30和32。扩张段30和32延伸至中断点,接下来是窄的部分34和36,它们具有基本上平行的边,其宽度比宽的部分26和28的宽度要小。窄的部分34和36延伸至侧导轨的末尾。
图3所示的实施例有侧导轨12和14,它们都有一平斜坡,侧导轨12和14在滑块的引导端20处最宽,而在其尾随端最窄。
中间导轨16在滑块的引导端20处有一斜坡11,在引导端处的宽度窄,以后宽度逐渐增加,直至滑块的尾随端22。如果在与滑块10的ABS相邻的支承空气中存在任何尘埃的话,中间导轨的形状可使得尘埃能沿凹槽18移动,从而离开位于中间导轨16尾随端的传感器24。
图中所示并已经加以描述过的滑块结构具有不同的压力区。当滑块的ABS靠近图6所示的磁盘21(沿箭头40所指的方向运动)的磁记录表面38时,在滑块部件上施加负载力,该力以滑块能够达到所需的“飞行”特性的方式平衡,这时候,压力区就形成了。各压力分量的合力使得滑块10相对于运动的磁盘38以所需的俯仰角θ“飞行”,其状态为:安装传感器的滑块尾随端最靠近磁盘表面,并确保留出离磁记录介质38为“飞行”高度距离d的间隙。
在所描述的实施例中,通过在中间导轨的尾随端安装较重负载(由于侧导轨较短,这也是与磁盘之间的最小间隙位置)与在侧导轨靠近滑块的引导端处安装的重负载达到平衡,使得对俯仰摆动和左右摆动敏感的参数对“飞行”高度误差的贡献减小。由于斜坡段11的存在以及滑块引导端较宽,来自滑块引导端侧导轨的压力很大。沿着侧导轨的压力逐渐减小,在到达滑块尾随端之前,压力消失。在滑块的引导端20处,中间导轨16几乎不产生压力,然后该压力逐渐增大,在接近滑块的尾随端22处变成最大。
结果所得到的合压力分布在靠近滑块10的引导端20处压力大,在滑块的中部压力相对较低,而在靠近滑块的尾端22处压力相对较高。这种设计保证了滑块和磁盘间的最小间隙(记录性能和磁头/磁盘交接的可靠性取决于这一间隙)对左右摆动参数很不敏感,这样滑块的宽度可以大大减小。此外,在中间导轨尾随端和侧导轨引导端的很大的空气支承压力充分保证了空气支承俯仰角稳定性和垂直稳定性,因此,滑块的长度也可以大大减小。这使得设计具有比其它设计达到的长度要小得多的滑块成为可能。
虽然以上参照本发明的最佳实施例说明和介绍了本发明,但是熟悉本领域的人员应当懂得,可对其做各种形式上修改,而不离开本发明的精神和范围。

Claims (2)

1、一种磁盘记录系统包括:具有记录表面的磁记录介质,支撑一个磁传感器的空气支承滑块;用于支承所述带有磁传感器的空气支承滑块的磁头臂装置,所述磁传感器紧靠所述磁记录介质的记录表面;以及用于支撑所述磁头臂装置并使该磁头臂装置相对于所述磁记录介质的记录表面运动的接近装置(accessing-means);所述空气支承滑块具有引导端和尾随端以及一个空气支承面,且侧导轨位于所述滑块的空气支承面的两侧且基本上共面,该系统的特征在于:上述侧导轨从所述滑块引导端开始,向滑块尾端延伸,以及
位于所述空气支承表面中间部分的一条中间导轨,该导轨被从所述滑块的引导端一直延伸至尾随端的凹槽与侧导轨分隔开,该中间导轨在所述引导端有一斜坡段,且在所述引导端,中间导轨的宽度窄,而在所说滑块尾随端宽度最大(垂直于从所述滑块的引导端到尾随端的方向量测),从而所述的滑块相对于所述运动磁记录介质的位置成预定的俯仰角和一预定的间隙,并且所述滑块和磁记录介质之间的最小间隙出现在滑块的尾端。
2、如权利要求1所述的磁盘记录系统,其特征在于:
所述侧导轨长度对所述滑块长度之比在0.5到0.9范围内。
CN90110143A 1988-09-28 1989-08-25 磁盘记录系统 Expired CN1017840B (zh)

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Application Number Priority Date Filing Date Title
US07/250,686 US4894740A (en) 1988-09-28 1988-09-28 Magnetic head air bearing slider
US250,686 1988-09-28

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CN89106616A Division CN1015496B (zh) 1988-09-28 1989-08-25 磁头空气支承滑块

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CN1052567A true CN1052567A (zh) 1991-06-26
CN1017840B CN1017840B (zh) 1992-08-12

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CN90110143A Expired CN1017840B (zh) 1988-09-28 1989-08-25 磁盘记录系统
CN89106616A Expired CN1015496B (zh) 1988-09-28 1989-08-25 磁头空气支承滑块

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EP (1) EP0361658B1 (zh)
JP (1) JPH071619B2 (zh)
KR (1) KR920001267B1 (zh)
CN (2) CN1017840B (zh)
AR (1) AR243295A1 (zh)
BR (1) BR8904889A (zh)
CA (1) CA1311838C (zh)
DE (1) DE68917239T2 (zh)
GB (1) GB8912167D0 (zh)

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AR243295A1 (es) 1993-07-30
CN1041470A (zh) 1990-04-18
JPH071619B2 (ja) 1995-01-11
DE68917239D1 (de) 1994-09-08
KR920001267B1 (ko) 1992-02-08
JPH02101688A (ja) 1990-04-13
DE68917239T2 (de) 1995-03-09
BR8904889A (pt) 1990-05-08
CN1017840B (zh) 1992-08-12
KR900005426A (ko) 1990-04-14
US4894740A (en) 1990-01-16
CN1015496B (zh) 1992-02-12
EP0361658B1 (en) 1994-08-03
EP0361658A1 (en) 1990-04-04
CA1311838C (en) 1992-12-22
GB8912167D0 (en) 1989-07-12

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