KR102424768B1 - Pldmos 트랜지스터 및 이의 제조 방법 - Google Patents
Pldmos 트랜지스터 및 이의 제조 방법 Download PDFInfo
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Abstract
Description
도 2 내지 도 4는 본 발명의 일 실시예에 의한 PLDMOS 트랜지스터의 제조 방법을 설명하기 위한 단면도들이다.
110 : N 도전형 매몰층 121 : 제1 항복전압 증가층
126 : 제2 항복전압 증가층 130 : 드리프트 영역
140 : 드레인 확장 영역 150 : 드레인 영역
160 : 소스 영역 180 : 필드 산화막
190 : 플러그
Claims (6)
- 기판;
상기 기판의 상부 표면에 형성된 P 도전형의 드리프트 영역;
상기 드리프트 영역의 일측 상부에 배치되며, 그 상부에 채널 영역이 형성되는 N 도전형의 제1 바디 영역;
상기 드리프트 영역의 타측 상부에 상기 제1 바디 영역으로부터 이격되어 배치되며, P 도전형의 드레인 확장 영역;
상기 드레인 확장 영역의 상부에 배치되며, P도전형의 드레인 영역;
상기 채널 영역 상에 형성된 게이트 구조물;
상기 드리프트 영역의 하부에 배치된 N 도전형 매몰층;
상기 드리프트 영역 및 상기 N 도전형 매몰층 사이와 상기 제1 바디 영역의 하부에 배치되고, RESURF에 의하여 항복 전압을 증가시키는 제1 항복전압 증가층; 및
상기 드리프트 영역 및 상기 N 도전형 매몰층 사이 및 상기 드레인 영역의 하부에, 상기 제1 항복전압 증가층으로부터 이격되도록 배치되고, RESURF에 의하여 항복 전압을 증가시키는 제2 항복전압 증가층을 포함하고,
상기 P도전형의 드레인 영역에 바이어스가 인가되면, 공핍 영역이 상기 드리프트 영역, 상기 제1 항복전압 증가층 및 상기 제2 항복 전압 증가층으로 확장됨으로써, 상기 게이트 구조물의 에지 부분에 형성된 전계를 완화하는 것을 특징으로 하는 PLDMOS 트랜지스터. - 제1항에 있어서, 상기 기판의 상부에 배치되고, 상기 N 도전형 매몰층과 전기적으로 연결된 플러그를 더 포함하는 것을 특징으로 하는 PLDMOS 트랜지스터.
- 제1항에 있어서, 상기 N 도전형 매몰층은 상기 드리프트 영역의 하부로부터 이격된 것을 특징으로 하는 PLDMOS 트랜지스터.
- 기판 내에 N 도전형 매몰층을 형성하는 단계;
상기 N 도전형 매몰층으로부터 P형 에피택셜층을 성장시키는 단계;
상기 P형 에피택셜층 내이며 상기 N 도전형 매몰층 상에 상호 이격된 제1 및 제2 항복 전압 증가층들 및 상기 제1 및 제2 항복 전압 증가층들 상에 P형 드리프트 영역을 형성하는 단계;
상기 드리프트 영역의 상부 내 및 상기 제1 항복 전압 증가층의 상부에 대응되도록 위치하며, 채널 영역을 형성하는 N 도전형의 제1 바디 영역을 형성하는 단계;
상기 드리프트 영역의 상부 내 및 상기 제2 항복 전압 증가층의 상부에 대응되도록 위치하며, 상기 제1 바디 영역과 이격되어 배치된 P 도전형의 드레인 확장 영역을 형성하는 단계;
상기 드레인 확장 영역의 상부에 P 도전형의 드레인 영역을 형성하는 단계; 및
상기 채널 영역 위에 게이트 구조물을 형성하는 단계를 포함하고,
상기 P도전형의 드레인 영역에 바이어스가 인가되면, 공핍 영역이 상기 드리프트 영역, 상기 제1 항복전압 증가층 및 상기 제2 항복 전압 증가층으로 확장됨으로써, 상기 게이트 구조물의 에지 부분에 형성된 전계를 완화하는 것을 특징으로 하는 PLDMOS 트랜지스터의 제조 방법. - 제4항에 있어서, 상기 N 도전형 매몰층과 전기적으로 연결된 플러그를 형성하는 단계를 더 포함하는 것을 특징으로 하는 PLDMOS 트랜지스터의 제조 방법.
- 제4항에 있어서, 상기 N 도전형 매몰층은 상기 드리프트 영역의 하부로부터 이격되도록 형성된 것을 특징으로 하는 PLDMOS 트랜지스터의 제조 방법.
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KR1020170170918A KR102424768B1 (ko) | 2017-12-13 | 2017-12-13 | Pldmos 트랜지스터 및 이의 제조 방법 |
US16/218,978 US11049938B2 (en) | 2017-12-13 | 2018-12-13 | P-type lateral double diffused MOS transistor and method of manufacturing the same |
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DE102017130223B4 (de) | 2017-12-15 | 2020-06-04 | Infineon Technologies Ag | Halbleitervorrichtung mit elektrisch parallel geschalteten planaren Feldeffekttransistorzellen und zugehöriger DC-DC-Wandler |
KR102224364B1 (ko) | 2019-10-02 | 2021-03-05 | 주식회사 키 파운드리 | 고전압 반도체 소자 및 그 제조 방법 |
CN114188414A (zh) | 2020-11-04 | 2022-03-15 | 台湾积体电路制造股份有限公司 | 具有增强的安全操作区域的ldmos及其制造方法 |
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