公开(公告)号：US6117620A

公开(公告)日：2000-09-12

申请号：US205667

申请日：1998-12-04

申请人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen ,  James Hammond Brannon

发明人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen ,  James Hammond Brannon

IPC分类号： G01N21/93 ,  G01N21/95 ,  G11B7/0037 ,  G11B7/26 ,  G03C5/16

CPC分类号： G01N21/93 ,  G01N21/9506 ,  G11B7/00375 ,  G11B7/26 ,  Y10S430/146

摘要： A method of making a calibration disk for a laser based inspection tool (LIT) for inspecting planar surfaces is described. The calibration disk has a plurality of overlapping bumps forming a circular ring with a width of one bump. The circular ring of bumps forms a feature of a known width and position on a disk which can be used to adjust one or more LIT's to yield calibrated results. The ring of overlapping bumps is preferably formed by rotating a disk substrate under a stationary pulsing laser beam.

摘要翻译： 描述了一种制造用于检查平面的激光检测工具（LIT）的校准盘的方法。 校准盘具有形成具有一个凸块的宽度的圆环的多个重叠凸块。 凸起的圆形环形成了盘上已知宽度和位置的特征，其可用于调节一个或多个LIT以产生校准结果。 优选地，通过在静止的脉冲激光束下旋转盘基片来形成重叠凸块的环。

公开(公告)号：US5847823A

公开(公告)日：1998-12-08

申请号：US840355

申请日：1997-04-28

申请人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen ,  James Hammond Brannon

发明人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen ,  James Hammond Brannon

IPC分类号： G01N21/93 ,  G01N21/95 ,  G11B7/0037 ,  G11B7/26 ,  G02B5/00 ,  G01N21/88

CPC分类号： G01N21/93 ,  G01N21/9506 ,  G11B7/00375 ,  G11B7/26 ,  Y10S430/146

摘要： A calibration disk for a laser based inspection tool (LIT) for inspecting planar surfaces is described. The calibration disk has a plurality of overlapping bumps forming a circular ring with a width of one bump. The circular ring of bumps forms a feature of a known width and position on a disk which can be used to adjust one or more LIT's to yield calibrated results.

摘要翻译： 描述了用于检查平面的激光检测工具（LIT）的校准盘。 校准盘具有形成具有一个凸块的宽度的圆环的多个重叠凸块。 凸起的圆形环形成了盘上已知宽度和位置的特征，其可用于调节一个或多个LIT以产生校正结果。

公开(公告)号：US06624884B1

公开(公告)日：2003-09-23

申请号：US08840351

申请日：1997-04-28

申请人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen ,  Steven Meeks ,  Richard Sonningfeld

发明人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen ,  Steven Meeks ,  Richard Sonningfeld

IPC分类号： G01N2188

CPC分类号： G01N21/88

摘要： A laser based inspection tool (LIT) for inspecting planar surfaces is described. In a preferred embodiment the LIT can simultaneously inspect both planar surfaces of disks for use in disk drives. In an embodiment of the invention, light reflected from the surface at an angle slightly offset from perpendicular is routed through a telecentric lens to a detector which converts the intensity of the reflected beam into an analog signal. The analog signal is sampled and digitized to generate pixel data. A data acquisition system sequentially stores the pixel data in a buffer. A median filter and derivative analysis can be applied to the pixel data to detect deviations indicating defects. An optional calibration system periodically reflects the scanning beam back to a detector to form a reference signal for use in absolute reflectivity measurements.

摘要翻译： 描述了一种用于检查平面的激光检测工具（LIT）。 在优选实施例中，LIT可以同时检查用于磁盘驱动器的磁盘的两个平面表面。 在本发明的一个实施例中，从表面以从垂直方向稍微偏离的角度反射的光通过远心透镜被路由到检测器，该检测器将反射光束的强度转换为模拟信号。 模拟信号被采样并数字化以产生像素数据。 数据采集​​系统将像素数据顺序存储在缓冲器中。 中值滤波器和导数分析可以应用于像素数据，以检测指示缺陷的偏差。 可选的校准系统周期性地将扫描光束反射回检测器以形成用于绝对反射率测量的参考信号。

公开(公告)号：US5917589A

公开(公告)日：1999-06-29

申请号：US840339

申请日：1997-04-28

申请人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

发明人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

IPC分类号： G01N21/94 ,  G01N21/88

CPC分类号： G01N21/94

摘要： A laser based inspection tool (LIT) for inspecting planar surfaces is described. In a preferred embodiment the LIT can simultaneously inspect both planar surfaces of disks for use in disk drives. The LIT uses a mechanical lifter which moves the disk through the laser scan lines (i.e. perpendicular to the scan lines) to allow the entire surface on each side of the disk to be scanned. The light reflected from the surface is routed to a detector which converts the intensity of the reflected beam into an analog signal. The analog signal is sampled and digitized to generate pixel data. A data acquisition system sequentially stores the pixel data in a buffer. The edges of the planar surface in the pixel data are determined for each scan line while data acquisition is in progress. A mask is applied to direct the defect detection only to meaningful areas of the disk while data acquisition is in progress. A median filter and derivative analysis can be applied to the pixel data to detect deviations indicating defects.

摘要翻译： 描述了一种用于检查平面的激光检测工具（LIT）。 在优选实施例中，LIT可以同时检查用于磁盘驱动器的磁盘的两个平面表面。 LIT使用机械升降器，其将盘移动通过激光扫描线（即垂直于扫描线），以允许扫描盘的每一侧上的整个表面。 从表面反射的光被路由到检测器，其将反射光束的强度转换成模拟信号。 模拟信号被采样并数字化以产生像素数据。 数据采集​​系统将像素数据顺序存储在缓冲器中。 在进行数据采集的同时，为每个扫描行确定像素数据中的平面的边缘。 应用掩码将缺陷检测仅指向磁盘的有意义的区域，同时数据采集正在进行。 中值滤波器和导数分析可以应用于像素数据，以检测指示缺陷的偏差。

公开(公告)号：US5867261A

公开(公告)日：1999-02-02

申请号：US840352

申请日：1997-04-28

申请人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

发明人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

IPC分类号： G01N21/95 ,  G01N21/88

CPC分类号： G01N21/9506

摘要： A laser based inspection tool (LIT) for inspecting planar surfaces is described. In a preferred embodiment the LIT can simultaneously inspect both planar surfaces of disks for use in disk drives. The LIT uses a mechanical lifter which moves the disk through the laser scan lines (i.e. perpendicular to the scan lines) to allow the entire surface on each side of the disk to be scanned. The light reflected from the surface is routed to a detector which converts the intensity of the reflected beam into an analog signal. The analog signal is sampled and digitized to generate pixel data. A data acquisition system sequentially stores the pixel data in a buffer. The edges of the planar surface in the pixel data are determined for each scan line while data acquisition is in progress. A mask is applied to direct the defect detection only to meaningful areas of the disk while data acquisition is in progress. A median filter and derivative analysis can be applied to the pixel data to detect deviations indicating defects. An optional calibration mirror is taught which is positioned to reflect substantially all of the incident beam during a segment of the scan line as the reflected calibration beam which is converted to an analog signal, sampled and digitized similarly to the reflected beam from the surface being inspected. By comparing the intensity of the calibration beam to the reflected beam the reflectivity of the surface can be measured.

摘要翻译： 描述了一种用于检查平面的激光检测工具（LIT）。 在优选实施例中，LIT可以同时检查用于磁盘驱动器的磁盘的两个平面表面。 LIT使用机械升降器，其将盘移动通过激光扫描线（即垂直于扫描线），以允许扫描盘的每一侧上的整个表面。 从表面反射的光被路由到检测器，其将反射光束的强度转换成模拟信号。 模拟信号被采样并数字化以产生像素数据。 数据采集​​系统将像素数据顺序存储在缓冲器中。 在进行数据采集的同时，为每个扫描行确定像素数据中的平面的边缘。 应用掩码将缺陷检测仅指向磁盘的有意义的区域，同时数据采集正在进行。 中值滤波器和导数分析可以应用于像素数据，以检测指示缺陷的偏差。 可选的校准反射镜被定位成在扫描线的一段期间基本上反射所有入射光束，作为被反射的校准光束，该反射校准光束被转换成模拟信号，与来自被检测表面的反射光束类似地进行采样和数字化 。 通过比较校准光束与反射光束的强度，可以测量表面的反射率。

公开(公告)号：US5969370A

公开(公告)日：1999-10-19

申请号：US840358

申请日：1997-04-28

申请人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

发明人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

IPC分类号： G01N21/88 ,  G11B7/0037 ,  G11B7/26

CPC分类号： G01N21/88 ,  G11B7/00375 ,  G11B7/26

摘要： A laser based inspection tool (LIT) for inspecting planar surfaces is described. In a preferred embodiment the LIT can simultaneously inspect both planar surfaces of disks for use in disk drives. In one embodiment of the invention, a disk is moved into an inspection subcompartment between a pair of air knives which blow partially ionized air onto the planar sides of the disk to remove loose particles adhering thereto. After the disk moves through the air knife streams, the two laser beams scan the two sides of the disk. Preferably the scan occurs after the air knives have been turned off and as the disk moves out of the inspection subcompartment. The subcompartment may optionally have an air source which forces air to flow out of the subcompartment to aid in maintaining a clean environment for inspection.

摘要翻译： 描述了一种用于检查平面的激光检测工具（LIT）。 在优选实施例中，LIT可以同时检查用于磁盘驱动器的磁盘的两个平面表面。 在本发明的一个实施例中，盘被移动到一对气刀之间的检查子舱中，所述气刀将部分电离空气吹送到盘的平面侧以除去附着在其上的松散颗粒。 在磁盘移动通过气刀流之后，两个激光束扫描磁盘的两侧。 优选地，扫描发生在气刀已经关闭之后并且当盘移出检查子舱室时。 子舱可以可选地具有迫使空气流出子舱的空气源，以帮助保持清洁的环境以供检查。

公开(公告)号：US5933230A

公开(公告)日：1999-08-03

申请号：US840354

申请日：1997-04-28

申请人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

发明人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

IPC分类号： G01N21/88 ,  G01N21/94 ,  G01N21/00

CPC分类号： G01N21/94 ,  G01N21/8806

摘要： A laser based inspection tool (LIT) for inspecting planar surfaces is described. In a preferred embodiment the LIT can simultaneously inspect both planar surfaces of disks for use in disk drives. The choice of a polygon scanner is preferred, but other scanning means such as a galvonometer mirror could be used. A separate polygon scanner is used for each side of the disk. The polygons are arranged in a common plane, but rotate in opposite directions to reduce the inteference which might otherwise result when the beams pass through the central hole in the disk and impinge on the detection channel for the other side. Preferably the rotation of the polygons is synchonized and angularly offset so that the two beams are synchonized and offset. The rotating polygons may conveniently be included in a system which scans each of the two laser beams through a telecentric lens assembly onto the surface and which routes the reflected light which passes back through the telecentric lens and is reflected from the polygons to the detection component.

摘要翻译： 描述了一种用于检查平面的激光检测工具（LIT）。 在优选实施例中，LIT可以同时检查用于磁盘驱动器的磁盘的两个平面表面。 多边形扫描器的选择是优选的，但是可以使用诸如电流计镜之类的其它扫描装置。 磁盘的每一侧都使用单独的多边形扫描器。 多边形布置在公共平面中，但是沿相反方向旋转以减小当光束通过盘中的中心孔并且撞击到另一侧的检测通道时可能导致的干涉。 优选地，多边形的旋转被同步并且成角度地偏移，使得两个光束被同步和偏移。 旋转的多边形可以方便地包括在将两个激光束中的每一个通过远心透镜组件扫描到表面上并且将穿过远心透镜返回的反射光路由并从多边形反射到检测部件的系统中。

公开(公告)号：US6100971A

公开(公告)日：2000-08-08

申请号：US841037

申请日：1997-04-28

申请人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

发明人： Wayne Isami Imaino ,  Anthony Juliana, Jr. ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen

IPC分类号： G01N21/95 ,  G01N21/88

CPC分类号： G01N21/9506

摘要： A laser based inspection tool (LIT) for inspecting planar surfaces is described. In a preferred embodiment the LIT can simultaneously inspect both planar surfaces of disks for use in disk drives. In an embodiment of the invention, the incident beam is directed onto the surface to be inspected at an angle slightly offset from perpendicular so that the reflected beam is physically separated from the incident beam. Although slightly offset the reflected beam is routed back through the telecentric lens and scanner which are used for the incident beam. Preferably an aperture mask is placed in the path of the reflected beam and the incident beam to limit the cone of scattered light. Since the incident and reflected beams are physically separated, there may be an aperture for each beam, but the two masks may be physically connected. The aperture masks may also be used for alignment adjustments of the beams.

摘要翻译： 描述了一种用于检查平面的激光检测工具（LIT）。 在优选实施例中，LIT可以同时检查用于磁盘驱动器的磁盘的两个平面表面。 在本发明的实施例中，入射光束以与垂直稍微偏移的角度被引导到要检查的表面上，使得反射光束与入射光束物理分离。 虽然稍微偏移，但是反射光束通过用于入射光束的远心透镜和扫描仪返回。 优选地，孔径掩模被放置在反射光束和入射光束的路径中以限制散射光的锥体。 由于事件和反射光束在物理上是分开的，所以每个光束可能有孔径，但是两个掩模可以物理连接。 光圈掩模也可用于光束的对准调整。

公开(公告)号：US06704435B1

公开(公告)日：2004-03-09

申请号：US08841214

申请日：1997-04-28

申请人： Wayne Isami Imaino ,  Anthony Juliana ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen ,  Steven Meeks ,  Richard Sonningfeld

发明人： Wayne Isami Imaino ,  Anthony Juliana ,  Milton Russell Latta ,  Charles H. Lee ,  Wai Cheung Leung ,  Hal J. Rosen ,  Steven Meeks ,  Richard Sonningfeld

IPC分类号： G06K900

CPC分类号： G01N21/9506

摘要： A laser based inspection tool (LIT) for inspecting planar surfaces is described. In a preferred embodiment the LIT can simultaneously inspect both planar surfaces of disks for use in disk drives. In one embodiment of the invention, the incident beam is directed onto the surface to be inspected at an angle slightly offset from perpendicular so that the reflected beam is physically separated from the incident beam. The reflected beam is routed to a detector which converts the intensity of the reflected into an analog signal. The analog signal is sampled and digitized to generate pixel data stored in a buffer. Various analyses are performed on the data including calculating a rate of change in the pixel data. If the rate of change in the pixel data exceeds a selected threshold that indicates a possible defect if it occurs in the data area of the disk.

摘要翻译： 描述了一种用于检查平面的激光检测工具（LIT）。 在优选实施例中，LIT可以同时检查用于磁盘驱动器的磁盘的两个平面表面。 在本发明的一个实施例中，入射光束以与垂直稍微偏移的角度被引导到待检查的表面上，使得反射光束与入射光束物理分离。 反射光束被路由到检测器，该检测器将反射的强度转换成模拟信号。 模拟信号被采样和数字化以产生存储在缓冲器中的像素数据。 对包括计算像素数据的变化率的数据进行各种分析。 如果像素数据的变化率超过选择的阈值，如果在磁盘的数据区域中发生可能的缺陷则表示可能的缺陷。

公开(公告)号：US20120250178A1

公开(公告)日：2012-10-04

申请号：US13077797

申请日：2011-03-31

申请人： Toshiki Hirano ,  Fu-Ying Huang ,  Jia-Yang Juang ,  Hal J. Rosen ,  Barry C. Stipe

发明人： Toshiki Hirano ,  Fu-Ying Huang ,  Jia-Yang Juang ,  Hal J. Rosen ,  Barry C. Stipe

IPC分类号： G11B5/02 ,  G11B5/673 ,  G11B5/66

CPC分类号： G11B5/66 ,  G11B5/7325 ,  G11B5/82

摘要： A magnetic media for heat assisted magnetic data recording. The magnetic media includes a thermal insulation layer structure formed near the substrate of the media provide more efficient heating of the write layer by allowing less heat dissipation to the substrate. The thermal insulation layer structure can be one or more layers of an oxide such as SiO2 and one or more layers of a material such as NiTa. Increasing the number of oxide layers and NiTa layers increases the thermal insulation of the thermal insulation layer structure thereby further increasing the efficiency of the heat assisted writing.

摘要翻译： 用于热辅助磁数据记录的磁介质。 磁介质包括在介质的衬底附近形成的绝热层结构，通过允许对衬底的较少散热来提供写入层的更有效的加热。 绝热层结构可以是一层或多层氧化物如SiO 2和一层或多层诸如NiTa的材料。 增加氧化物层和NiTa层的数量增加了绝热层结构的热绝缘性，从而进一步提高了热辅助写入的效率。