Invention Grant
- Patent Title: Film formation via pulsed RF plasma
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Application No.: US16785331Application Date: 2020-02-07
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Publication No.: US11443919B2Publication Date: 2022-09-13
- Inventor: Krishna Nittala , Diwakar N. Kedlaya , Karthik Janakiraman , Yi Yang , Rui Cheng
- 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: H01L21/02
- IPC: H01L21/02 ; C23C16/515 ; H01J37/32 ; C23C16/505

Abstract:
Systems and methods of using pulsed RF plasma to form amorphous and microcrystalline films are discussed herein. Methods of forming films can include (a) forming a plasma in a process chamber from a film precursor and (b) pulsing an RF power source to cause a duty cycle on time (TON) of a duty cycle of a pulse generated by the RF power source to be less than about 20% of a total cycle time (TTOT) of the duty cycle to form the film. The methods can further include (c) depositing a first film interlayer on a substrate in the process chamber; (d) subsequent to (c), purging the process chamber; and (e) subsequent to (d), introducing a hydrogen plasma to the process chamber. Further in the method, (b)-(e) are repeated to form a film. The film can have an in-film hydrogen content of less than about 10%.
Public/Granted literature
- US20200258720A1 FILM FORMATION VIA PULSED RF PLASMA Public/Granted day:2020-08-13
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