KR20180061386A - 낮은 비저항의 텅스텐 막의 물리 기상 증착을 위한 시스템들 및 방법들 - Google Patents
낮은 비저항의 텅스텐 막의 물리 기상 증착을 위한 시스템들 및 방법들 Download PDFInfo
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Abstract
Description
[0010] 도 1a는 본 개시내용의 하나 또는 그 초과의 실시예들에 따른 개선된 특성들을 갖는 DRAM 메모리의 동적 메모리 셀의 회로 다이어그램을 예시한다.
[0011] 도 1b는 도 1a의 DRAM 셀에 적용가능한 게이트 전극 스택을 예시하며, 게이트 전극 스택은 본 개시내용의 하나 또는 그 초과의 실시예들에 따른 낮은 비저항의 텅스텐 박막의 증착에 의해 형성되는 피처(feature)를 포함한다.
[0012] 도 2는 본 개시내용의 하나 또는 그 초과의 실시예들에 따른, 낮은 비저항의 텅스텐 박막의 증착에 의해 기판 상에 피처를 형성하는 방법의 프로세스 다이어그램을 예시한다.
[0013] 도 3은 본 개시내용의 하나 또는 그 초과의 실시예들에 따른, 기판 상의 텅스텐 박막 증착에 의해 형성된 피처를 포함하는 회로 구조들을 형성하기 위한 다수의 챔버들을 갖는 플랫폼 시스템을 예시한다.
[0014] 도 4a는 본 개시내용의 실시예에 따른 플라즈마 프로세싱 챔버의 단면도를 예시한다.
[0015] 도 4b는 본 개시내용의 실시예에 따른 챔버의 등각도를 도시한다.
[0016] 도 5는 본 개시내용의 하나 또는 그 초과의 실시예들에 따른, 낮은 비저항의 텅스텐 박막의 증착에 의해 기판 상에 피처를 형성하는 데 사용하기 위한 마그네트론의 부분의 상면도를 도시한다.
[0017] 도 6은 본 개시내용의 하나 또는 그 초과의 실시예들에 따른, 낮은 비저항의 텅스텐 박막의 증착에 의해 기판 상에 피처를 형성하는 데 사용하기 위한 대체 마그네트론의 부분의 상면도를 도시한다.
[0018] 도 7은 본 개시내용과 일치하는 실시예들에 따른 스퍼터링에 의해 획득된 박막 텅스텐 층의 비저항과 두께 사이의 관계를 도시하는 그래픽적 표현이다.
[0019] 이해를 촉진시키기 위해, 도면들에 대해 공통적인 동일한 엘리먼트들을 가리키기 위해 가능한 경우 동일한 도면부호들이 사용되었다. 도면들은 실척대로 그려지지 않았으며, 명확성을 위해 단순화될 수 있다. 더욱이, 일 실시예의 엘리먼트들 및 피처들은 추가의 언급없이 본 개시내용과 일치하는 다른 실시예들에 유리하게 통합될 수 있다.
Claims (15)
- 집적 회로의 텅스텐 구조를 스퍼터 증착하는 방법으로서,
기판을 플라즈마 프로세싱 챔버 내로, 그리고 텅스텐 타겟을 포함하는 스퍼터 타겟 어셈블리에 대향하는 기판 지지부 상으로 이동시키는 단계 ― 상기 텅스텐 타겟은 불순물들로서 존재하는 10 ppm(parts per million) 이하의 탄소 및 10 ppm(parts per million) 이하의 산소를 가짐 ―;
크립톤을 상기 플라즈마 프로세싱 챔버 내로 유동시키는 단계; 및
상기 기판 지지부에 의해 지지되는 기판의 재료 층 상에 텅스텐 막 층을 스퍼터링에 의해 증착시키기 위해 상기 크립톤을 플라즈마로 여기시키는 단계를 포함하는,
집적 회로의 텅스텐 구조를 스퍼터 증착하는 방법. - 제1 항에 있어서,
상기 스퍼터 타겟 어셈블리는 상기 텅스텐 타겟에 커플링된 배킹 플레이트(backing plate)를 더 포함하는,
집적 회로의 텅스텐 구조를 스퍼터 증착하는 방법. - 제2 항에 있어서,
상기 배킹 플레이트는 티타늄 배킹 플레이트이고, 그리고 상기 스퍼터 타겟 어셈블리는 상기 티타늄 배킹 플레이트와 텅스텐 타겟 사이에 배치된 알루미늄 본딩 층을 더 포함하는,
집적 회로의 텅스텐 구조를 스퍼터 증착하는 방법. - 제2 항에 있어서,
상기 텅스텐 타겟은 대략 8.75 내지 대략 9.0 μohm-cm의 비저항(resistivity)을 갖는,
집적 회로의 텅스텐 구조를 스퍼터 증착하는 방법. - 제1 항 내지 제4 항 중 어느 한 항에 있어서,
상기 텅스텐 타겟은,
적어도 500 옹스트롬(Å)의 두께; 또는
대략 19 내지 대략 19.35 g/cm3의 밀도 및 대략 8.75 내지 대략 9.0 μohm-cm의 비저항
중 적어도 하나를 갖는,
집적 회로의 텅스텐 구조를 스퍼터 증착하는 방법. - 제1 항 내지 제4 항 중 어느 한 항에 있어서,
상기 텅스텐 막 층은, 대략 250 내지 대략 300 옹스트롬(Å)의 두께에서 대략 9.0 μohm-cm 미만의 비저항을 갖는,
집적 회로의 텅스텐 구조를 스퍼터 증착하는 방법. - 제1 항 내지 제4 항 중 어느 한 항에 있어서,
상기 여기시키는 단계는, RF 전력 공급부로부터 상기 기판으로 바이어싱 RF 전력을 전달하고 그리고 DC 전력원으로부터 상기 텅스텐 타겟으로 DC 전력을 전달하는 단계를 포함하는,
집적 회로의 텅스텐 구조를 스퍼터 증착하는 방법. - 제1 항 내지 제4 항 중 어느 한 항에 있어서,
상기 재료 층은 텅스텐 질화물 또는 텅스텐 실리사이드를 포함하는,
집적 회로의 텅스텐 구조를 스퍼터 증착하는 방법. - 플라즈마 프로세싱 챔버 내에서 사용하기 위한 타겟으로서,
불순물들로서 존재하는 10 ppm(parts per million) 이하의 탄소 및 10 ppm(parts per million) 이하의 산소를 갖는 텅스텐 타겟을 포함하는 스퍼터 타겟 어셈블리를 포함하는,
플라즈마 프로세싱 챔버 내에서 사용하기 위한 타겟. - 플라즈마 프로세싱 챔버로서,
불순물들로서 존재하는 10 ppm(parts per million) 이하의 탄소 및 10 ppm(parts per million) 이하의 산소를 갖는 텅스텐 타겟을 포함하는 스퍼터 타겟 어셈블리 ― 상기 텅스텐 타겟은 프로세싱 구역과 접촉하는 제1 표면 및 상기 제1 표면에 대향하는 제2 표면을 가짐 ―;
상기 텅스텐 타겟 아래에 배치된, 기판 수용 표면을 갖는 기판 지지부;
상기 텅스텐 타겟에 커플링된 DC 전력 공급부;
상기 기판 지지부에 커플링된 RF 전력 공급부; 및
상기 텅스텐 타겟의 제2 표면 근처에 배치된 마그네트론을 포함하며,
상기 마그네트론은,
복수의 자석들을 포함하는 외측 폴(outer pole); 및
복수의 자석들을 포함하는 내측 폴(inner pole)을 포함하며,
상기 외측 폴 및 내측 폴은 폐루프 마그네트론 어셈블리(closed-loop magnetron assembly)를 형성하고, 그리고 상기 외측 폴 및 상기 내측 폴 각각은 자기장을 생성하는,
플라즈마 프로세싱 챔버. - 제10 항에 있어서,
상기 스퍼터 타겟 어셈블리는 상기 텅스텐 타겟에 커플링된 배킹 플레이트를 더 포함하는,
플라즈마 프로세싱 챔버. - 제11 항에 있어서,
상기 배킹 플레이트는 티타늄 배킹 플레이트이고, 그리고 상기 스퍼터 타겟 어셈블리는 상기 티타늄 배킹 플레이트와 텅스텐 타겟 사이에 배치된 알루미늄 본딩 층을 더 포함하는,
플라즈마 프로세싱 챔버. - 제11 항에 있어서,
상기 텅스텐 타겟은 대략 8.75 내지 대략 9.0 μohm-cm의 비저항을 갖는,
플라즈마 프로세싱 챔버. - 제10 항 내지 제13 항 중 어느 한 항에 있어서,
상기 텅스텐 타겟은 적어도 500 옹스트롬(Å)의 두께를 갖는,
플라즈마 프로세싱 챔버. - 제10 항 내지 제13 항 중 어느 한 항에 있어서,
상기 텅스텐 타겟은 대략 19.0 내지 대략 19.30 g/cm3의 밀도 및 대략 8.75 내지 대략 9.0 μohm-cm의 비저항을 갖는,
플라즈마 프로세싱 챔버.
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| US201562245050P | 2015-10-22 | 2015-10-22 | |
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| US14/981,190 US10043670B2 (en) | 2015-10-22 | 2015-12-28 | Systems and methods for low resistivity physical vapor deposition of a tungsten film |
| US14/981,190 | 2015-12-28 | ||
| PCT/US2016/058134 WO2017070479A1 (en) | 2015-10-22 | 2016-10-21 | Systems and methods for low resistivity physical vapor deposition of a tungsten film |
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| Publication number | Publication date |
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| US20180337052A1 (en) | 2018-11-22 |
| WO2017070479A1 (en) | 2017-04-27 |
| JP2018537849A (ja) | 2018-12-20 |
| TWI701347B (zh) | 2020-08-11 |
| KR102899023B1 (ko) | 2025-12-10 |
| CN108140560B (zh) | 2023-04-11 |
| US20170117153A1 (en) | 2017-04-27 |
| CN108140560A (zh) | 2018-06-08 |
| TWI738410B (zh) | 2021-09-01 |
| US10734235B2 (en) | 2020-08-04 |
| TW201728767A (zh) | 2017-08-16 |
| TW202039878A (zh) | 2020-11-01 |
| JP6857652B2 (ja) | 2021-04-14 |
| US10043670B2 (en) | 2018-08-07 |
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