KR20210055791A - 탭의 활성 영역 아래에 있는 웰의 경계를 포함하는 방법 및 장치 - Google Patents
탭의 활성 영역 아래에 있는 웰의 경계를 포함하는 방법 및 장치 Download PDFInfo
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- KR20210055791A KR20210055791A KR1020217013528A KR20217013528A KR20210055791A KR 20210055791 A KR20210055791 A KR 20210055791A KR 1020217013528 A KR1020217013528 A KR 1020217013528A KR 20217013528 A KR20217013528 A KR 20217013528A KR 20210055791 A KR20210055791 A KR 20210055791A
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Abstract
Description
도 2a, 2b 및 2c는 다양한 실시 예들에 따른 더 높은 항복 전압을 갖는 장치의 단면도를 도시한다.
도 3은 도 2a, 2b 및 2c의 실시 예에 따른 장치의 평면도를 도시한다.
도 4 내지 도 11은 도 2a, 2b 및 2c의 실시 예들에 따른 장치를 제조하기 위한 공정 흐름도를 도시한다.
도 12는 도 2a, 2b 및 2c의 실시 예들에 따른 장치를 포함하는 메모리 디바이스의 블록도를 도시한다.
Claims (20)
- 장치에 있어서,
제2 유형의 전도성(conductivity)을 갖는 반도체 구조 내에 형성된 제1 유형의 전도성을 갖는 웰(well); 및
상기 웰에 대한 탭(tap)을 포함하고, 상기 웰과 상기 반도체 구조 사이의 상기 웰의 경계는 실질적으로 상기 탭의 활성 영역 아래에 있으며 상기 웰의 상기 경계는 트렌치(trench)의 코너(corner)에 또는 그 위에 있는 상기 반도체 구조의 상기 트렌치의 측면과 교차하고, 추가로 상기 활성 영역은 상기 웰 내의 제2 도핑 영역 및 제1 도핑 영역을 포함하고, 상기 제2 도핑 영역은 동일한 전도성 도펀트(dopant)로 상기 제1 도핑 영역보다 더 높은 농도로 도핑되는, 장치. - 제1항에 있어서, 상기 탭의 측면은 상기 반도체 구조에 형성된 상기 트렌치의 측면에 근접한, 장치.
- 제1항에 있어서, 상기 탭의 상기 활성 영역에 결합된 접촉부(contact)를 더 포함하고, 상기 접촉부는 상기 웰 위에 있는, 장치.
- 제1항에 있어서, 상기 제2 도핑 영역은 n+ 도펀트로 주입되고 상기 제1 도핑 영역은 n- 도펀트로 주입되는, 장치.
- 제1항에 있어서, 상기 웰 및 상기 반도체 구조에 의해 형성된 p-n 접합은 상기 반도체 구조에 형성된 트렌치의 코너 또는 그 위에서 접합을 갖는, 장치.
- 제1항에 있어서, 상기 제1 도핑 영역은 실질적으로 상기 제2 도핑 영역과 상기 트렌치에 인접한 상기 탭의 측면 사이에 있는, 장치.
- 장치를 형성하는 방법으로서, 상기 방법은:
제2 유형의 전도성을 갖는 반도체 구조 내에 제1 유형의 전도성을 갖는 웰을 형성하는 단계; 및
상기 웰과 상기 반도체 구조 사이의 상기 웰의 경계가 실질적으로 탭의 활성 영역 아래에 있으며 상기 활성 영역은 제1 도핑 영역 및 제2 도핑 영역을 포함하고, 상기 제2 도핑 영역은 동일한 전도성 도펀트로 상기 제1 도핑 영역보다 더 높은 농도로 도핑되고 추가로 트렌치의 제1 측벽은 상기 탭의 제1 측면을 형성하고 추가로 상기 웰의 상기 경계는 상기 트렌치의 바닥과 상기 제1 측벽 사이의 코너에서 또는 그 근처에서 상기 트렌치를 교차하도록, 상기 활성 영역을 포함하는 상기 웰에 대한 상기 탭을 형성하는 단계를 포함하는, 방법. - 제7항에 있어서, 추가로 상기 제1 도핑 영역은 실질적으로 상기 탭의 상기 제1 측면과 상기 제2 도핑 영역과 사이에 있는, 방법.
- 제8항에 있어서, 상기 트렌치를 유전체 재료로 채우는 단계를 더 포함하는, 방법.
- 제9항에 있어서, 상기 웰의 나머지 부분보다 더 높은 농도로 도핑된 영역을 형성하기 위해 상기 웰의 노출된 부분에 다른 도펀트를 주입하는 단계를 더 포함하는, 방법.
- 제8항에 있어서, 상기 탭을 형성하는 단계는 상기 트렌치의 상기 에지와 더 높은 농도로 도핑된 상기 웰의 상기 영역 사이에 남아 있는 상기 반도체 구조의 상기 일부를 주입하는 단계를 포함하는, 방법.
- 제11항에 있어서, 상기 웰의 상기 나머지 부분보다 더 높은 농도로 도핑된 상기 영역에 접촉부를 형성하는 단계를 더 포함하는, 방법.
- 제8항에 있어서, 절연 영역을 형성하기 위해 상기 트렌치의 바닥 표면에 인접한 상기 반도체 구조의 다른 부분에 도펀트를 주입하는 단계를 더 포함하는, 방법.
- 장치에 있어서,
제2 유형의 전도성을 갖는 반도체 구조 내에 형성된 제1 유형의 전도성을 갖는 웰; 및
상기 웰에 대한 탭을 포함하고, 상기 웰과 상기 반도체 구조 사이의 상기 웰의 경계는 상기 반도체 구조에 형성된 트렌치를 교차하고, 상기 교차는 상기 트렌치의 코너에 근접하거나 그 위에 있고, 상기 탭의 활성 영역은 상기 웰 내의 제1 도핑 영역 및 제2 도핑 영역을 포함하고, 상기 제2 도핑 영역은 동일한 전도성 도펀트로 상기 제1 도핑 영역보다 더 높은 농도로 도핑되고, 상기 제1 도핑 영역은 실질적으로 상기 트렌치에 인접한 상기 탭의 측면과 상기 제2 도핑 영역 사이에 있는, 장치. - 제14항에 있어서, 상기 탭의 상기 측면은 상기 트렌치의 측면으로부터 형성된, 장치.
- 제14항에 있어서, 상기 탭의 상기 활성 영역에 결합된 접촉부를 더 포함하고, 상기 접촉부는 상기 웰 위에 있는, 장치.
- 제14항에 있어서, 상기 제2 도핑 영역은 n+ 도펀트로 주입되고 상기 제1 도핑 영역은 n- 도펀트로 주입되는, 장치.
- 제14항에 있어서, 상기 웰 및 상기 반도체 구조에 의해 형성된 p-n 접합은 상기 트렌치의 코너에 인접한, 장치.
- 제14항에 있어서, 상기 탭의 상기 활성 영역은 상기 웰의 상기 경계에 걸쳐 연속적인, 장치.
- 제14항에 있어서, 상기 제1 도핑 영역은 실질적으로 상기 웰에 둘러싸여 있는, 장치.
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| US16/159,180 US10679991B2 (en) | 2018-10-12 | 2018-10-12 | Methods and apparatuses including a boundary of a well beneath an active area of a tap |
| US16/159,180 | 2018-10-12 | ||
| PCT/US2019/054740 WO2020076638A1 (en) | 2018-10-12 | 2019-10-04 | Methods and apparatuses including a boundary of a well beneath an active area of a tap |
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| EP3474314A1 (en) * | 2017-10-20 | 2019-04-24 | Infineon Technologies Austria AG | Semiconductor device and method for manufacturing a semiconductor method |
| US10679991B2 (en) * | 2018-10-12 | 2020-06-09 | Micron Technology, Inc. | Methods and apparatuses including a boundary of a well beneath an active area of a tap |
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| JP2023126931A (ja) | 2023-09-12 |
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