Invention Grant
- Patent Title: System and method of plasma discharge ignition to reduce surface particles
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Application No.: US15818273Application Date: 2017-11-20
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Publication No.: US10818502B2Publication Date: 2020-10-27
- Inventor: Sergey Voronin , Jason Marion , Yusuke Yoshida , Alok Ranjan , Takashi Enomoto , Yoshio Ishikawa
- Applicant: TOKYO ELECTRON LIMITED
- Applicant Address: JP Tokyo
- Assignee: TOKYO ELECTRON LIMITED
- Current Assignee: TOKYO ELECTRON LIMITED
- Current Assignee Address: JP Tokyo
- Agency: Rothwell, Figg, Ernst & Manbeck, P.C.
- Main IPC: H01L21/3065
- IPC: H01L21/3065 ; H01J37/32 ; H01L21/67 ; H01L21/683

Abstract:
Systems and methods are disclosed for plasma discharge ignition to reduce surface particles and thereby decrease defects introduced during plasma processing. A microelectronic workpiece is positioned on a holder within a process chamber that includes a first radio frequency (RF) power source configured to couple RF power to a top portion of the process chamber, a second RF power source configured to couple RF power to the holder, and a direct current (DC) power supply. Initially, a process gas for plasma process is flowed into the process chamber. The process gas is ignited to form plasma by activating the second RF power source to apply RF power to the holder. Subsequently, the microelectronic workpiece is clamped to the holder by applying the positive voltage to the holder with the DC power supply, and the first RF power source is activated to maintain the plasma within the process chamber.
Public/Granted literature
- US20180144946A1 METHOD OF PLASMA DISCHARGE IGNITION TO REDUCE SURFACE PARTICLES Public/Granted day:2018-05-24
Information query
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