Invention Grant
- Patent Title: Real time monitoring with closed loop chucking force control
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Application No.: US15979787Application Date: 2018-05-15
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Publication No.: US10460916B2Publication Date: 2019-10-29
- Inventor: Wendell Glenn Boyd, Jr. , Vijay D. Parkhe , Matthew James Busche , Konstantin Makhratchev , Masanori Ono , Senh Thach
- Applicant: Applied Materials, Inc.
- Applicant Address: US CA Santa Clara
- Assignee: APPLIED MATERIALS, INC.
- Current Assignee: APPLIED MATERIALS, INC.
- Current Assignee Address: US CA Santa Clara
- Agency: Patterson + Sheridan LLP
- Main IPC: H05B33/00
- IPC: H05B33/00 ; H01J37/32 ; H01L21/683 ; H01L21/66 ; H01L21/67 ; H01L21/687

Abstract:
Embodiments disclosed herein include a method for minimizing chucking forces on a workpiece disposed on a electrostatic chuck within a plasma processing chamber. The method begins by placing a workpiece on an electrostatic chuck in a processing chamber. A plasma is struck within the processing chamber. A deflection force is monitored on the workpiece. A chucking voltage is applied at a minimum value. A backside gas pressure is applied at a minimum pressure. The chucking voltage and or backside gas pressure is adjusted such that the deflection force is less than a threshold value. And the chucking voltage and the backside gas pressure are simultaneously ramped up.
Public/Granted literature
- US20180330926A1 REAL TIME MONITORING WITH CLOSED LOOP CHUCKING FORCE CONTROL Public/Granted day:2018-11-15
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