公开(公告)号：US20100142080A1

公开(公告)日：2010-06-10

申请号：US12329719

申请日：2008-12-08

申请人： Youping Deng ,  Randall G. Simmons ,  Wing T. Tang ,  Huiping Yang

发明人： Youping Deng ,  Randall G. Simmons ,  Wing T. Tang ,  Huiping Yang

IPC分类号： G11B21/02

CPC分类号： G11B5/455 ,  G11B5/40 ,  G11B5/6029 ,  G11B5/6064 ,  G11B5/607

摘要： A method and apparatus for detecting predetermined surface characteristics in head gimbal assemblies to improve hard disk drive reliability. The predetermined surface characteristics include head slider protrusions such as scratches or contamination that can cause damage to the head or disk in hard drives. By detecting these protrusions, those drives with an increased chance of failure can be removed from a test group, thereby increasing the quality and reliability of the remaining disk drives. The invention provides a method of detecting these protrusions that is a more practical option than using a scanning electron microscope (SEM) to inspect each head slider.

摘要翻译： 一种用于检测头万向架组件中的预定表面特性以提高硬盘驱动器可靠性的方法和装置。 预定的表面特征包括头部滑块突起，例如可能在硬盘驱动器中损坏头部或盘的划痕或污染。 通过检测这些突起，可以从测试组中移除具有增加的故障几率的驱动器，从而提高剩余磁盘驱动器的质量和可靠性。 本发明提供一种检测这些突起的方法，这比使用扫描电子显微镜（SEM）来检查每个磁头滑块更实际的选择。

公开(公告)号：US5068054A

公开(公告)日：1991-11-26

申请号：US322589

申请日：1989-03-13

申请人： Kathleen M. Betterton ,  William D. Hinsberg ,  Huu T. Nguyen ,  Wing T. Tang ,  Robert J. Twieg

发明人： Kathleen M. Betterton ,  William D. Hinsberg ,  Huu T. Nguyen ,  Wing T. Tang ,  Robert J. Twieg

IPC分类号： G02F1/13 ,  C07C327/28 ,  C07C327/32 ,  C09K19/20 ,  C09K19/28 ,  C09K19/32

CPC分类号： C09K19/28 ,  C07C327/32 ,  C09K19/322

摘要： Disclosed are compounds of the general formula:R--O--Ar--COS--Ph--COO--R'characterized by the presence of the thioester (--COS--) core and wherein R is an alkyl group with typically 8 to 16 carbon atoms, Ar is a substituted aromatic core group such as 1,4-benzene, 2,6-naphthalene, 4,4'-biphenyl, or 4,4'-diphenylethane, and R' is a chiral branched alkyl group such as the 1-substituted cases 1-methylpropyl through 1-methyloctyl or 2-substituted case such as 2-methylbutyl. These materials or their mixtures possess ferroelectric phases and as such are of interest for electro-optical applications. In certain cases specific materials are of particular interest due to the existence of stable ferroelectric phases near room temperature with large polarization density and fast electro-optic response.

公开(公告)号：US07982987B2

公开(公告)日：2011-07-19

申请号：US12329719

申请日：2008-12-08

申请人： Youping Deng ,  Randall G. Simmons ,  Wing T. Tang ,  Huiping Yang

发明人： Youping Deng ,  Randall G. Simmons ,  Wing T. Tang ,  Huiping Yang

IPC分类号： G11B27/36 ,  G11B21/02 ,  G11B5/02

CPC分类号： G11B5/455 ,  G11B5/40 ,  G11B5/6029 ,  G11B5/6064 ,  G11B5/607

摘要： A method and apparatus for detecting predetermined surface characteristics in head gimbal assemblies to improve hard disk drive reliability. The predetermined surface characteristics include head slider protrusions such as scratches or contamination that can cause damage to the head or disk in hard drives. By detecting these protrusions, those drives with an increased chance of failure can be removed from a test group, thereby increasing the quality and reliability of the remaining disk drives. The invention provides a method of detecting these protrusions that is a more practical option than using a scanning electron microscope (SEM) to inspect each head slider.

摘要翻译： 一种用于检测头万向架组件中的预定表面特性以提高硬盘驱动器可靠性的方法和装置。 预定的表面特征包括头部滑块突起，例如可能在硬盘驱动器中损坏头部或盘的划痕或污染。 通过检测这些突起，可以从测试组中移除具有增加的故障几率的驱动器，从而提高剩余磁盘驱动器的质量和可靠性。 本发明提供一种检测这些突起的方法，这比使用扫描电子显微镜（SEM）来检查每个磁头滑块更实际的选择。