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发明公开
CN105719989A 减少在晶片边缘的背面沉积 有权

减少在晶片边缘的背面沉积
摘要：
本发明涉及减少在晶片边缘的背面沉积，提供了一种用于在晶片上沉积膜的处理室，其包括基座，所述基座具有中央顶表面，所述中央顶表面具有被配置成将所述晶片支撑在所述中央顶表面上面的支撑水平的多个晶片支撑件，处于所述中央顶表面下的台阶处的环形表面；承载环，所述承载环配置成由承载环支撑件支撑，使得所述承载环的底部表面是在所述环形表面上方的第一垂直间隔处，所述承载环具有相对于顶部表面被定义的台阶下表面；其中，当所述承载环坐落在所述承载环支撑件上时，然后所述承载环的所述台阶下表面被定位在处理水平，所述处理水平在相对于所述基座的顶表面上方的支撑水平的第二垂直间隔处。
摘要（英）：

The inventoin relates to reducing backside deposition at wafer edge. A process chamber for depositing a film on a wafer is provided, including: a pedestal having, a central top surface having a plurality of wafer supports configured to support the wafer at a support level above the central top surface, an annular surface at a step down from the central top surface; a carrier ring configured to be supported by carrier ring supports such that a bottom surface of the carrier ring is at a first vertical separation above the annular surface, the carrier ring having a step down surface defined relative to a top surface; wherein when the carrier ring is seated on the carrier ring supports, then the step down surface of the carrier ring is positioned at a process level that is at a second vertical separation from the support level over the top surface of the pedestal.

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