KR20200130041A - 폐루프 다중 출력 rf 매칭 - Google Patents
폐루프 다중 출력 rf 매칭 Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0483—Transmitters with multiple parallel paths
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/04—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant in circuits having distributed constants, e.g. having very long conductors or involving high frequencies
- G01R27/06—Measuring reflection coefficients; Measuring standing-wave ratio
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32137—Radio frequency generated discharge controlling of the discharge by modulation of energy
- H01J37/32155—Frequency modulation
- H01J37/32165—Plural frequencies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32174—Circuits specially adapted for controlling the RF discharge
- H01J37/32183—Matching circuits
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- H—ELECTRICITY
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- H01J37/32—Gas-filled discharge tubes
- H01J37/32917—Plasma diagnostics
- H01J37/32935—Monitoring and controlling tubes by information coming from the object and/or discharge
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
- H03H7/40—Automatic matching of load impedance to source impedance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/332—Coating
- H01J2237/3321—CVD [Chemical Vapor Deposition]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/334—Etching
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Abstract
Description
도 1b는 일 실시예에 따른, 반도체 제조 프로세스를 수행하도록 활용된 시스템의 다양한 컴포넌트들을 도시하는 블록도이다.
도 2는 일 실시예에 따른, 반도체 제조 프로세스의 수행에서 사용된 폐루프 복수-출력 RF (radio frequency) 매칭 프로세스의 다양한 컴포넌트들을 도시하는 블록도이다.
도 3은 일 실시예에 따른, 반도체 제조 프로세스의 수행에서 사용된 폐루프 복수-출력 RF 매칭 프로세스에서 활용된 다양한 회로 엘리먼트들을 도시하는 도면이다.
도 4는 일 실시예에 따른, 반도체 제조 프로세스의 수행에 사용된 폐루프 복수-출력 RF 매칭 프로세스에서 매칭 반영 최적화 (match reflection optimization) 를 수행하기 위해 활용된 회로 엘리먼트들을 도시하는 도면이다.
도 5는 일 실시예에 따른, 폐루프 복수-출력 RF 매칭 프로세스의 RF 전력 제어를 수행하기 위해 사용된 회로 엘리먼트들을 도시하는 도면이다.
도 6은 일 실시예에 따른, 반도체 제조 프로세스의 수행에 사용된 폐루프 복수-출력 RF 매칭 프로세스에서 RF 격리 및 필터링을 수행하기 위해 사용된 회로 엘리먼트들을 도시하는 도면이다.
도 7은 일 실시예에 따른, 반도체 제조 프로세스의 수행에 사용된 폐루프 복수-출력 RF 복수-출력 매칭 프로세스에서 매칭 및/또는 임피던스 변환을 수행하도록 사용된 회로 엘리먼트들을 도시하는 도면이다.
도 8은 멀티-스테이션 프로세싱 툴의 일 실시예의 개략도를 도시한다.
Claims (16)
- 반도체 웨이퍼 제조 프로세스를 위해 활용된 프로세스 챔버의 스테이션으로 신호들을 제공하기 위한 장치에 있어서,
제 1 주파수 및 제 2 주파수를 갖는 신호들을 생성하기 위한 복수의 신호 생성기들;
VSWR (voltage standing wave ratio) 을 측정하기 위한 측정 회로; 및
상기 측정 회로로부터의 출력 신호에 응답하여 조정가능한 반응성 컴포넌트를 갖는 매칭 반영 최적화기 (match reflection optimizer) 를 포함하는, 신호 제공 장치. - 제 1 항에 있어서,
상기 VSWR을 측정하기 위한 상기 측정 회로는 위상-감지 전압/전류 측정 회로에 대응하는, 신호 제공 장치. - 제 1 항에 있어서,
상기 반응성 컴포넌트는 가변 커패시터에 대응하는, 신호 제공 장치. - 제 1 항에 있어서,
상기 스테이션의 하나 이상의 입력 포트들에서 제 2 VSWR을 측정하기 위한 제 2 측정 회로를 더 포함하는, 신호 제공 장치. - 제 1 항에 있어서,
상기 장치의 HF 부분과 LF 부분 사이에 25 내지 40 dB의 격리를 제공하기 위한 격리 RF 필터를 더 포함하는, 신호 제공 장치. - 제 1 항에 있어서,
상기 매칭 반영 최적화기는 문턱값보다 작은 값으로 상기 VSWR를 감소시키도록 구성되는, 신호 제공 장치. - 제 6 항에 있어서,
상기 VSWR의 상기 문턱값은 1.15:1에 대응하는, 신호 제공 장치. - 제 6 항에 있어서,
상기 VSWR의 상기 문턱값은 1.10:1에 대응하는, 신호 제공 장치. - 프로세스 챔버의 복수의 스테이션들에 대응하는 수의 신호 생성기들로부터의 복수의 신호들을 커플링하는 방법에 있어서,
전력 분배기의 입력 포트에서 VSWR을 측정하는 단계; 및
상기 측정된 VSWR에 응답하여, 매칭 반영 최적화기의 반응성 컴포넌트의 값을 조정하는 단계로서, 상기 반응성 컴포넌트의 상기 조정은 제 1 문턱값보다 낮은 VSWR을 유발하는 것인, 상기 조정하는 단계를 포함하는, 복수의 신호들을 커플링하는 방법. - 제 9 항에 있어서,
상기 반응성 컴포넌트는 가변 커패시터를 포함하는, 복수의 신호들을 커플링하는 방법. - 제 9 항에 있어서,
상기 VSWR을 조정하는 단계는 상기 VSWR을 1.15:1보다 작은 값으로 하강시키는 것을 포함하는, 복수의 신호들을 커플링하는 방법. - 제 9 항에 있어서,
상기 측정하는 단계는 400 ㎑의 주파수를 갖는 제 1 신호의 상기 VSWR, 및 27.12 ㎒의 주파수를 갖는 제 2 신호의 상기 VSWR을 측정하는 단계를 포함하는, 복수의 신호들을 커플링하는 방법. - 제 12 항에 있어서,
상기 복수의 신호 생성기들의 제 1 주파수의 신호 생성기에서 상기 제 2 주파수를 갖는 상기 신호를 25 내지 40 dB의 양만큼 감쇠시키는 단계를 더 포함하는, 복수의 신호들을 커플링하는 방법. - 제 9 항에 있어서,
상기 프로세스 챔버의 상기 복수의 스테이션들 중 하나 이상의 입력 포트에서 VSWR을 측정하는 단계; 및
RF 전력 제어 회로의 반응성 컴포넌트의 값을 조정하는 단계로서, 상기 RF 전력 제어 회로의 상기 반응성 컴포넌트의 상기 조정은 제 2 문턱값보다 낮은 VSWR을 유발하는 것인, 상기 조정하는 단계를 더 포함하는, 복수의 신호들을 커플링하는 방법. - 제 9 항에 있어서,
360 ㎑ 내지 440 ㎑의 제 1 주파수에서 신호의 상기 VSWR을 하강시키도록 파이-매칭 (pi-match) 회로의 반응성 컴포넌트의 값을 조정하는 단계를 더 포함하는, 복수의 신호들을 커플링하는 방법. - 제 9 항에 있어서,
26.5 ㎒ 내지 27.5 ㎒의 제 2 주파수에서 상기 VSWR 을 하강시키도록 L-매칭 회로의 반응성 컴포넌트의 상기 값을 조정하는 단계를 더 포함하는, 복수의 신호들을 커플링하는 방법.
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US12205796B2 (en) | 2019-07-31 | 2025-01-21 | Lam Research Corporation | Radio frequency power generator having multiple output ports |
US11984298B2 (en) | 2019-12-02 | 2024-05-14 | Lam Research Corporation | Impedance transformation in radio-frequency-assisted plasma generation |
US11994542B2 (en) | 2020-03-27 | 2024-05-28 | Lam Research Corporation | RF signal parameter measurement in an integrated circuit fabrication chamber |
KR20230021739A (ko) | 2020-06-12 | 2023-02-14 | 램 리써치 코포레이션 | Rf 커플링 구조체들에 의한 플라즈마 형성의 제어 |
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JP2025041803A (ja) | 2025-03-26 |
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