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    • 18. 发明授权
    • Stand-off pad for supporting a wafer on a substrate support chuck
    • 用于在基板支撑卡盘上支撑晶片的支撑垫
    • US06217655B1
    • 2001-04-17
    • US08791941
    • 1997-01-31
    • Ananda H. KumarShamouil ShamouilianHyman J. LevinsteinVijay Parkhe
    • Ananda H. KumarShamouil ShamouilianHyman J. LevinsteinVijay Parkhe
    • B05C1300
    • H01L21/6833H01L21/6875
    • A stand-off pad, and method of fabricating the same, for supporting a workpiece in a spaced apart relation to a workpiece support chuck. More specifically, the wafer stand-off pad is fabricated of a polymeric material, such as polyimide, which is disposed upon the support surface of the chuck. The stand-off pad maintains a wafer, or other workpiece, in a spaced apart relation to the support surface of the chuck. The distance between the underside surface of the wafer and the chuck is defined by the thickness of the stand-off pad. This distance should be larger than the expected diameter of contaminant particles that may lie on the surface of the chuck. In this manner, the contaminant particles do not adhere to the underside of the wafer during processing and the magnitude of the chucking voltage is maintained between the workpiece and the chuck.
    • 支撑垫及其制造方法,用于以与工件支撑卡盘间隔开的关系支撑工件。 更具体地说,晶片支座由诸如聚酰亚胺的聚合材料制成,其设置在卡盘的支撑表面上。 支座将保持晶片或其它工件与卡盘的支撑表面间隔开。 晶片的下表面和卡盘之间的距离由支座的厚度限定。 该距离应大于可能位于卡盘表面上的污染物颗粒的预期直径。 以这种方式,污染物颗粒在处理期间不粘附到晶片的下侧,并且夹持电压的幅度保持在工件和卡盘之间。
    • 20. 发明授权
    • Electrostatic chuck with conformal insulator film
    • 带保形绝缘膜的静电吸盘
    • US5745331A
    • 1998-04-28
    • US381786
    • 1995-01-31
    • Shamouil ShamouilianSasson SomekhHyman J. LevinsteinManoocher BirangSemyon SherstinskyJohn F. Cameron
    • Shamouil ShamouilianSasson SomekhHyman J. LevinsteinManoocher BirangSemyon SherstinskyJohn F. Cameron
    • B23Q3/15H01L21/683H02N13/00
    • H01L21/6831H01L21/6833H02N13/00
    • An electrostatic chuck (20) for holding a substrate (75) comprises (i) a base (80) having an upper surface (95) with grooves (85) therein, the grooves (85) sized and distributed for holding coolant for cooling a substrate (75), and (ii) a substantially continuous insulator film (45) conformal to the grooves (85) on upper surface (95) of the base (80). The base (80) can be electrically conductive and capable of serving as the electrode (50) of the chuck (20), or the electrode (50) can be embedded in the insulator film (45). The insulator film (45) has a dielectric breakdown strength sufficiently high that when a substrate (75) placed on the chuck (20) and electrically biased with respect to the electrode (50), electrostatic charge accumulates in the substrate (75) and in the electrode (50) forming an electrostatic force that attracts and holds the substrate (75) to the chuck (20). Preferably the chuck (20) is fabricated using a pressure forming process, and more preferably using a pressure differential process.
    • 用于保持基板(75)的静电卡盘(20)包括(i)具有在其中具有凹槽(85)的上表面(95)的基部(80),所述凹槽(85)的尺寸和分布以保持用于冷却的冷却剂 衬底(75),和(ii)与基座(80)的上表面(95)上的凹槽(85)共形的基本上连续的绝缘膜(45)。 基座(80)可以是导电的并且能够用作卡盘(20)的电极(50),或者电极(50)可以嵌入绝缘膜(45)中。 绝缘体膜(45)具有足够高的绝缘击穿强度,当放置在卡盘(20)上并相对于电极(50)电偏置的基板(75)时,静电电荷积聚在基板(75)中 所述电极(50)形成吸引并保持所述基板(75)到所述卡盘(20)的静电力。 优选地,使用压力成形方法制造卡盘(20),更优选使用压差法。