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1. 发明授权

US06375748B1 Method and apparatus for preventing edge deposition 有权
标题翻译：防止边缘沉积的方法和装置
公开(公告)号：US06375748B1
公开(公告)日：2002-04-23
申请号：US09387928
申请日：1999-09-01
申请人： Joseph Yudovsky , Tom Madar , Salvador Umotoy , Son Ngoc Trinh , Lawrence C. Lei , Anzhong (Andrew) Chang , Xiaoxiong (John) Yuan
发明人： Joseph Yudovsky , Tom Madar , Salvador Umotoy , Son Ngoc Trinh , Lawrence C. Lei , Anzhong (Andrew) Chang , Xiaoxiong (John) Yuan
IPC分类号： C23C1600
CPC分类号： H01L21/68735 , H01L21/68785
摘要： A substrate support having a removable edge ring, which is made of a material having a lower coefficient of thermal expansion (CTE), than that of the substrate support is provided. The edge ring and the substrate support are configured for pin and slot coupling. Specifically, either the edge ring, or the substrate support comprises a plurality of pins, and the other of the edge ring or the substrate support comprises a plurality of hollow regions or slots in which the pins may be inserted. The slots are at least as wide as a corresponding one of the plurality of pins and extend in the direction in which the substrate support expands and contracts during thermal cycling. Each of the slots extends a length which is sufficient to compensate for the difference between the CTE of the substrate support and the CTE of the edge ring, over the range of process temperatures to which the apparatus is exposed. Preferably the susceptor is made of aluminum, and the edge ring is made of ceramic. A restrictor gap may be defined between a surface of the substrate support and a surface of the purge ring so as to restrict a volume of purge gas flowing to an edge of a substrate positioned on the substrate support. The purge gas delivery channel may have an exposed outlet and may be upwardly angled to facilitate cleaning.
摘要翻译：提供了一种具有可移除的边缘环的衬底支撑件，其由具有比衬底支撑件的热膨胀系数（CTE）低的材料制成。边缘环和基板支撑件配置为销和槽联接。具体来说，边缘环或衬底支撑件包括多个销，并且边缘环或衬底支撑件中的另一个包括可以插入销的多个中空区域或狭槽。所述槽至少与所述多个销中相应的销一样宽，并且在所述基板支撑件在热循环期间膨胀和收缩的方向上延伸。每个狭槽的长度足以补偿基板支撑件的CTE与边缘环的CTE之间的差异，在该设备暴露于该处理温度的范围内。优选地，基座由铝制成，并且边缘环由陶瓷制成。限定器间隙可以限定在衬底支撑件的表面和净化环的表面之间，以便限制流过位于衬底支撑件上的衬底的边缘的吹扫气体的体积。净化气体输送通道可以具有暴露的出口并且可以向上成角度以便于清洁。

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