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    • 1. 发明授权
    • Preparing method of silica slurry for wafer polishing
    • 二氧化硅浆料的制备方法用于晶片抛光
    • US06432151B1
    • 2002-08-13
    • US09644018
    • 2000-08-22
    • Jae Hyun SoMin Ho OhSun Hyuck BaeSeung Man YangDo Hyun Kim
    • Jae Hyun SoMin Ho OhSun Hyuck BaeSeung Man YangDo Hyun Kim
    • C09K314
    • C09K3/1463C01B33/126C09G1/02
    • Disclosed herein is a method of preparing silica slurry for wafer polishing. This method includes pre-treating relatively inexpensive and commercially available fumed or colloidal silica particles as a seed by a settling, a crushing using a ball mill and a paint shaker, and a sonication to produce an aqueous dispersion of the silica particles. The pre-treated silica particles are then combined with tetraethylorothosilicate as a precursor, an alcohol solvent and a base, and grown to a desired size by hydrolysis and polycondensation of the precursor, tetraethylorothosilicate. Then, the alcohol solvent, in which the silica particles are grown, are displaced with water by a vacuum distillation. The resulting aqueous dispersion of the grown silica dispersion is hydrothermally treated in an autoclave. Thus, this method allows the economical preparation of the spherical silica particles having a highly uniform size and a very high purity.
    • 本文公开了一种制备用于晶片抛光的二氧化硅浆料的方法。 该方法包括通过沉降,使用球磨机和油漆搅拌器进行粉碎,超声处理来预处理比较廉价且市售的热解法或胶态二氧化硅颗粒作为种子,以产生二氧化硅颗粒的水分散体。 然后将经预处理的二氧化硅颗粒与作为前体的四乙基偏硅酸盐,醇溶剂和碱组合,并通过前体四乙基硅酸酯的水解和缩聚生长至所需尺寸。 然后,通过真空蒸馏,用水代替生成二氧化硅颗粒的醇溶剂。 将生成的二氧化硅分散体的所得水分散体在高压釜中进行水热处理。 因此,该方法允许经济地制备具有高度均匀尺寸和非常高纯度的球形二氧化硅颗粒。
    • 9. 发明授权
    • Feeder for surface mounting device
    • 表面安装装置的进料器
    • US06748991B2
    • 2004-06-15
    • US09989461
    • 2001-11-21
    • Ji Hyun HwangDo Hyun KimSang Yeon Hwang
    • Ji Hyun HwangDo Hyun KimSang Yeon Hwang
    • B65C940
    • H05K13/0417Y10S156/937Y10T156/19
    • A feeder for the surface mounting device is disclosed. The feeder includes a feeding unit being installed at one side of a main frame, having a plurality of armature coils and a circular permanent magnetic unit facing the plurality of armature coils to generate a rotation/reverse rotation force and carry a tape at a pitch interval and having a position sensing unit and a position detecting disk capable of sensing the position of the circular permanent magnetic unit, a vinyl separation unit carrying the vinyl removed from the tape by the rotation force or re-carrying the vinyl by the reverse rotation force, and a vinyl recovery unit recovering the vinyl by winding the same by the rotation force or discharging the vinyl by the reverse rotation force.
    • 公开了用于表面安装装置的馈线。 进料器包括一个进料单元,该进料单元安装在主框架的一侧,具有多个电枢线圈和面向多个电枢线圈的圆形永磁单元,以产生旋转/反向旋转力,并以间距间隔运送磁带 并且具有能够检测圆形永磁单元的位置的位置检测单元和位置检测盘,通过旋转力携带从带取出的乙烯的乙烯基分离单元或通过反向旋转力重新携带乙烯基的乙烯基分离单元, 和乙烯基回收装置,通过旋转力使其回收乙烯基,通过反转力将乙烯基排出。
    • 10. 发明授权
    • Cooling apparatus for linear motor
    • 线性电机冷却装置
    • US06717295B2
    • 2004-04-06
    • US10195449
    • 2002-07-16
    • Ji Hyun HwangDo Hyun KimJoon Seok Song
    • Ji Hyun HwangDo Hyun KimJoon Seok Song
    • H02K900
    • H02K41/031H02K9/00
    • The present invention discloses a cooling apparatus for a linear motor comprising: a ‘U’ shaped stator back iron; a stator having a plurality of permanent magnets installed on inner facing surfaces of the stator back iron; a coil unit positioned between the stator and the permanent magnets with a predetermined gap; a movable unit having a movable unit back iron fixed on the coil unit, the movable back iron having at least one first air hole formed therein in a longitudinal direction and a first air nozzle linked to the first air hole for injecting cooling air from the top portion of the coil unit to the bottom portion; and a frame aligned at the lower portion of the coil unit having a second air hole formed in a longitudinal direction thereof for receiving the cooling air and a second air nozzle linked to the second air hole for injecting the cooling air from the bottom portion of the coil unit to the top portion.
    • 本发明公开了一种线性电动机的冷却装置,包括:U形定子后铁; 定子,其具有安装在定子后铁的内表面上的多个永磁体; 线圈单元,其以预定的间隙定位在定子和永磁体之间; 具有固定在所述线圈单元上的可动单元后铁的可动单元,所述可动后铁具有沿纵向形成在其中的至少一个第一空气孔和连接到所述第一空气孔的第一空气喷嘴,用于从顶部喷射冷却空气 线圈单元的一部分到底部; 并且在所述线圈单元的下部对准的框架具有沿其长度方向形成的用于接收冷却空气的第二空气孔和连接到所述第二空气孔的第二空气喷嘴,用于从所述第二空气孔的底部喷射冷却空气 线圈单元到顶部。