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公开(公告)号：US5777740A
公开(公告)日：1998-07-07
申请号：US807669
申请日：1997-02-27
CPC分类号： G01B11/306
摘要： An apparatus and method for measuring the topographic profile of a reflective member having an index of refraction. The apparatus comprises a first optical system that reflects a light beam from the reflective member and detects the reflected light beam. A second optical system directs the light beam to interfere with the reflected light beam and detects the resulting interference pattern. A processor coupled to the first optical system and the second optical system computes the index of refraction of the reflective member from the detected reflected light beam and provides the topographic profile of the reflective member from the index of refraction and the interference pattern.
摘要翻译： 一种用于测量具有折射率的反射构件的地形图的装置和方法。 该装置包括第一光学系统，其反射来自反射构件的光束并检测反射光束。 第二光学系统引导光束干涉反射光束并检测所得到的干涉图案。 耦合到第一光学系统和第二光学系统的处理器从检测到的反射光束计算反射构件的折射率，并且从折射率和干涉图案提供反射构件的形貌。
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公开(公告)号：US5793480A
公开(公告)日：1998-08-11
申请号：US719003
申请日：1996-09-24
CPC分类号： G01N21/211
摘要： An apparatus and method for measuring the space between a transparent member such as a substrate, and reflective member such as a slider. The apparatus includes a first optical system which detects a first light beam that is reflected from the substrate and the slider. The reflected light is separated into four separate beams. The intensities of the beams are detected and utilized to determine a first stokes parameter, a second stokes parameter, a third stokes parameter and a fourth stokes parameter of the reflected light. The stokes parameters are used to compute the real index of refraction n, extinction coefficient k and the thickness of the space. The four stokes parameters account for any depolarized light that is reflected from the slider. The first optical system may have a photodetector which detects an image of the slider. The image provides multiple data points that can be used to calculate n, k and the thickness of the air gap without a retract routine. The apparatus may also have a second optical system which detects a second light beam reflected from the substrate and the slider. The second optical system can be used to dynamically measure a thickness of the space. In the combined system the first optical system may accurately measure the n and k of a slider area while the second optical system dynamically measures the thickness of the air gap.
摘要翻译： 用于测量诸如基板的透明构件之间的空间以及诸如滑块的反射构件之间的空间的装置和方法。 该装置包括第一光学系统，其检测从基板和滑块反射的第一光束。 反射光分成四个独立的光束。 检测并利用光束的强度来确定反射光的第一斯托克斯参数，第二斯托克斯参数，第三斯托克斯参数和第四斯托克斯参数。 斯托克斯参数用于计算实际折射率n，消光系数k和空间厚度。 四个斯托克斯参数表示从滑块反射的任何去极化光。 第一光学系统可以具有检测滑块的图像的光电检测器。 图像提供了多个数据点，可用于计算n，k和气隙的厚度，而无需缩回程序。 该装置还可以具有检测从基板和滑块反射的第二光束的第二光学系统。 第二光学系统可用于动态测量空间的厚度。 在组合系统中，第一光学系统可以精确地测量滑块区域的n和k，而第二光学系统动态地测量气隙的厚度。
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3.发明授权Thin film flying height calibration disk for calibrating flying height testers 失效用于校准飞行高度测试仪的薄膜飞行高度校准盘
公开(公告)号：US5808736A
公开(公告)日：1998-09-15
申请号：US718899
申请日：1996-09-24
CPC分类号： G11B5/6005 , G11B21/21 , G11B23/0021 , G11B33/10 , G11B5/84
摘要： A calibration medium that is used to calibrate a flying height tester which measures the gap of an air bearing formed between a magnetic recording head and a substrate. The medium contains a first ridge and a second ridge that extend from an underlying substrate. The ridges may be coated with a reflective material. A flying height tester can be calibrated by measuring light reflected from each ridge. The ridges have varying thicknesses so that the calibration medium will produce multiple data points.
摘要翻译： 用于校准飞行高度测试仪的校准介质，其测量在磁记录头和基底之间形成的空气轴承的间隙。 介质包含从下面的基底延伸的第一脊和第二脊。 脊可以涂覆有反射材料。 飞行高度测试仪可以通过测量从每个脊反射的光来校准。 脊具有不同的厚度，使得校准介质将产生多个数据点。
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公开(公告)号：US5696653A
公开(公告)日：1997-12-09
申请号：US766898
申请日：1996-12-13
申请人： Christopher A. Lacey
发明人： Christopher A. Lacey
CPC分类号： G11B5/4826
摘要： A tooling fixture that holds a head gimbal assembly (HGA) of a hard disk drive within a piece of test equipment. The tooling fixture includes a plurality of pads that extend from a top surface of a chimney. The HGA has a slider that is mounted to a flexure arm. The flexure arm extends from a base plate of the HGA. The base plate has a swage mount that is inserted into a corresponding aperture of the chimney when an operator loads an HGA into the tester. The pads of the chimney support the base plate and the HGA. The base plate is typically clamped onto the chimney by a spring biased clamp. The HGA is moved adjacent to a rotating disk of the tester. The pads provide a reliable contact surface that improves the repeatability of the HGA positioning which in turn can improve the tester.
摘要翻译： 一种工具夹具，用于将一块硬盘驱动器的头万向节组件（HGA）保持在一个测试设备内。 工具夹具包括从烟囱的顶表面延伸的多个垫。 HGA具有安装到挠曲臂的滑块。 挠曲臂从HGA的底板延伸。 当操作员将HGA加载到测试仪中时，底板具有插入烟囱的相应孔中的模具安装件。 烟囱的垫支撑底板和HGA。 基板通常通过弹簧偏压夹具夹在烟囱上。 HGA靠近测试仪的旋转盘移动。 焊盘提供可靠的接触表面，提高了HGA定位的重复性，从而可以改善测试仪。
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公开(公告)号：US5638178A
公开(公告)日：1997-06-10
申请号：US522553
申请日：1995-09-01
CPC分类号： G01N21/211
摘要： An apparatus and method for measuring the space between a transparent member such as a disk, and reflective member such as a slider, by detecting a change of polarization of a reflected light beam. The apparatus includes a light source that emits a light beam. The light beam is circularly polarized and directed onto the disk and reflected off of the interface between the disk and the slider. The reflected light beam is split into four separately polarized beams by a beam splitter/polarizer assembly. The four light beams have varying intensities that are measured by photodetectors. Stokes parameters are computed from electrical signals that are generated by the photodetectors. The Stokes parameters correlate to the change in polarization of the reflected light beam. Ellipsometric parameters delta and psi are computed from the Stokes parameters. The thickness of the space and the complex index of refraction (n and K) of the slider are computed from the delta and psi parameters, typically by computing two separate sets of ellipsometric parameters at two different spacing thicknesses.
摘要翻译： 通过检测反射光束的偏振变化来测量诸如光盘之类的透明部件和诸如滑块的反射部件之间的空间的装置和方法。 该装置包括发射光束的光源。 光束被圆偏振并且被引导到盘上并从盘和滑块之间的界面反射出来。 反射光束通过分束器/偏振器组件分成四个分开的偏振光束。 四个光束具有由光电检测器测量的变化的强度。 斯托克斯参数由光电检测器产生的电信号计算。 斯托克斯参数与反射光束极化的变化相关。 椭圆偏振参数delta和psi由斯托克斯参数计算。 滑块的厚度和复数折射率（n和K）由delta和psi参数计算，通常通过计算两个不同间距厚度的两组椭偏参数来计算。
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公开(公告)号：US4888657A
公开(公告)日：1989-12-19
申请号：US274540
申请日：1988-11-21
CPC分类号： G11B23/047 , G11B15/62 , G11B5/4893
摘要： To obtain the correct tape wrap angle at the head in a cassette loaded recorder, tape guiding support "outriggers" integral with the head assembly are provided. The outriggers are located on either side of the active portion of the head structure to guide the tape and to establish the tape/head wrap angle independent of the exact locations of the cassette guides. Slots separate the active head structure from each of the outriggers, presenting an edge at each side of the head to skive any air film adherent to the moving tape as it approaches the head's transducer. Additionally, the entire head and outrigger structure is fabricated from the same or mechanically similar materials and has an overall constant area profile contour which wears at a uniform rate due to tape abrasion.
摘要翻译： 为了在装有磁带的记录仪中的头部获得正确的磁带包装角度，提供了与磁头组件成一体的带导向支架“外伸支架”。 外伸支架位于头部结构的有效部分的任一侧，以引导胶带并且独立于盒导板的确切位置建立胶带/头包裹角度。 插槽将主动头部结构与每个外伸支架分开，在头部的每一侧呈现边缘，以便在接近头部传感器时将附着在移动胶带上的任何空气膜滑动。 此外，整个头部和外伸支架结构由相同或机械相似的材料制成，并且具有由于带磨损而以均匀速率磨损的总体恒定面积轮廓轮廓。
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公开(公告)号：US4875129A
公开(公告)日：1989-10-17
申请号：US274507
申请日：1988-11-21
摘要： In a recorder having two inline heads, such as a record head followed by a reproduce head, it is necessary to insure adequate tape wrap angle at the transducing element of each head. Because the tape is spanned between the two inline heads, the tape leaves the apex of one head at a zero wrap angle and arrives at the apex of the second head with a zero wrap angle. The invention provides outriggers on each head assembly which guide the tape, and teaches placing each transducing element off the apex of its head assembly to maintain adequate wrap angles at the transducing elements of each inline head. The outriggers are provided with slots which skive entrapped air to prevent tape "flying" with attendant loss of contact with the transducing elements. The contours of the outriggers and the lands on which the transducing elements of each head assembly are located form constant area profiles to provide constant wear characteristics for the head assemblies.
摘要翻译： 在具有两个内联头部的记录器中，例如记录头，随后是再现头，必须在每个头部的换能元件处确保足够的胶卷包角。 由于磁带跨在两个内嵌头之间，磁带以一个零包角度离开一个磁头的顶点，并以零包角到达第二磁头的顶点。 本发明提供了引导胶带的每个头部组件上的支架，并且教导将每个换能元件从其头部组件的顶点放置，以在每个内联头部的换能元件处保持足够的包角。 外伸支架设置有槽，其夹入空气以防止带状物“飞行”，伴随着与换能元件的接触失去接触。 外伸支架和每个头部组件的换能元件所在的平台的轮廓形成恒定区域轮廓，以为头部组件提供恒定的磨损特性。
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公开(公告)号：US5805284A
公开(公告)日：1998-09-08
申请号：US797536
申请日：1997-02-07
申请人： Christopher A. Lacey
发明人： Christopher A. Lacey
CPC分类号： G11B33/10 , G01B11/14 , G11B21/21 , G11B27/36 , G11B5/6076
摘要： An efficient method and apparatus for taking the data needed for a glide test; the data includes measuring flying height of a slider over a regular rotating disk and measuring piezoelectric contact with the disk. An optical system provides a beam of light. To measure the flying height, part of the beam of light is reflected from a surface of the transparent slider. Another portion of the beam is reflected from the surface of a rotating disk. The two beams are transferred through an optical system and imaged onto a CCD camera which converts the separation of intensity maxima or intensity minima into information regarding the air gap separating the slider and the disk. A piezoelectric sensor on the slider measures slider contact with the disk. A processor combines data from the piezoelectric sensor with data from the CCD camera to measure disk asperities.
摘要翻译： 一种用于获取滑翔测试所需数据的有效方法和装置; 数据包括测量滑块在常规旋转盘上的飞行高度并测量与盘的压电接触。 光学系统提供光束。 为了测量飞行高度，光束的一部分从透明滑块的表面反射。 梁的另一部分从旋转盘的表面反射。 两个光束通过光学系统传送并成像到CCD相机上，CCD相机将强度最大值或强度最小值的分离转换成关于分离滑块和盘的气隙的信息。 滑块上的压电传感器测量与磁盘的滑块接触。 处理器将来自压电传感器的数据与CCD相机的数据相结合，以测量磁盘粗糙度。
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