Invention Grant
US08641916B2 Plasma etching apparatus, plasma etching method and storage medium
有权
等离子体蚀刻装置,等离子体蚀刻方法和存储介质
- Patent Title: Plasma etching apparatus, plasma etching method and storage medium
- Patent Title (中): 等离子体蚀刻装置,等离子体蚀刻方法和存储介质
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Application No.: US12692913Application Date: 2010-01-25
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Publication No.: US08641916B2Publication Date: 2014-02-04
- Inventor: Koichi Yatsuda , Yoshinobu Ooya , Shin Okamoto , Hiromasa Mochiki
- Applicant: Koichi Yatsuda , Yoshinobu Ooya , Shin Okamoto , Hiromasa Mochiki
- 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.
- Priority: JP2009-014254 20090126
- Main IPC: B44C1/22
- IPC: B44C1/22 ; C03C15/00 ; C03C25/68 ; C23F1/00 ; H01L21/302 ; H01L21/461

Abstract:
A plasma etching method for forming a hole in an etching target film by a plasma processing apparatus is provided. The apparatus includes an RF power supply for applying RF power for plasma generation to at least one of upper and lower electrodes, and a DC power supply for applying minus DC voltage to the upper electrode. A first condition that plasma is generated by turning on the RF power supply and minus DC voltage is applied to the upper electrode and a second condition that the plasma is extinguished by turning off the RF power supply and minus DC voltage is applied to the upper electrode are alternately repeated. Etching is performed by positive ions in the plasma under the first condition and negative ions are supplied into the hole by the DC voltage to neutralize positive ions in the hole under the second condition.
Public/Granted literature
- US20100190350A1 PLASMA ETCHING APPARATUS, PLASMA ETCHING METHOD AND STORAGE MEDIUM Public/Granted day:2010-07-29
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