KR930009125A - N-MOS transistor and manufacturing method thereof - Google Patents

N-MOS transistor and manufacturing method thereof Download PDF

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Publication number
KR930009125A
KR930009125A KR1019910018989A KR910018989A KR930009125A KR 930009125 A KR930009125 A KR 930009125A KR 1019910018989 A KR1019910018989 A KR 1019910018989A KR 910018989 A KR910018989 A KR 910018989A KR 930009125 A KR930009125 A KR 930009125A
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South Korea
Prior art keywords
oxide film
etching
film
region
forming
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KR1019910018989A
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Korean (ko)
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유종선
백종태
남기수
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경상현
재단법인 한국전자통신연구소
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Priority to KR1019910018989A priority Critical patent/KR930009125A/en
Publication of KR930009125A publication Critical patent/KR930009125A/en

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Abstract

본 발명은 소오스와 드레인 사이에 높은 펀치드로우 전압(punchthrough voltage)을 얻는 동시에 기생접합용량(parasitic junction capacitance)이 과도하게 커지는 것을 방지하는 n-MOS 트랜지스터의 제조방법 및 그 장치에 관한 것이다.The present invention relates to a method and apparatus for manufacturing an n-MOS transistor that obtains a high punchthrough voltage between a source and a drain while simultaneously preventing an excessively large parasitic junction capacitance.

본 발명은 제1규소산화막(22)과 규소질화막(23)을 순차로 형성하는 단계와, 제2규소산화막을 증착한 후 식각하여 측벽산화막(24)을 형성하는 단계와, 감광막(25)을 도포하는 단계와, 게이트(21)의 상부 감광막을 식각하여 상기 측벽 산화막(24)을 노출시킨 후 불화수소용액으로 상기 측벽산화막(24)을 식각하여 노출되는 부위(27)에 붕소를 이온주입한 다음 남은 감광막을 제거하고 급속열처리 방법 혹은 열확산 방법으로 p영역(28)을 형성하는 다계 및, 인산용액으로 상기 규소질화막(23)을 식각하는 단계를 포함한다.According to the present invention, the steps of sequentially forming the first silicon oxide film 22 and the silicon nitride film 23, depositing and etching the second silicon oxide film to form the sidewall oxide film 24, and the photosensitive film 25 Applying the boron to the exposed portion 27 by etching the upper photoresist layer of the gate 21 to expose the sidewall oxide layer 24 and then etching the sidewall oxide layer 24 with a hydrogen fluoride solution. And removing the remaining photoresist film and forming the p region 28 by a rapid thermal treatment method or a thermal diffusion method, and etching the silicon nitride film 23 with a phosphoric acid solution.

Description

엔 모스(n-MOS) 트랜지스터 및 그 제조방법N-MOS transistor and manufacturing method thereof

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 펀치드로우(punchthrough) 전압을 높이기 위하여 소오스와 드레인 주위에 p+영역을 형성한 LDD n-MOS 트랜지스터 구조.2 is an LDD n-MOS transistor structure in which a p + region is formed around a source and a drain to increase a punchthrough voltage.

Claims (6)

규소기판(18)상에 필드산화막(19)을 형성하고 열산화막과 n+다결정규소박막을 순차로 형성한 후 리소그라피 방법으로 게이트(21)와 게이트산화막(20)을 순차로 형성하고, 열확산방법 혹은 급속열처리방법으로 LDD(8)와 소오스 및 드레인(31)을 형성하는 엔 모스 트랜지스터의 제조방법에 있어서, 열산화방법 혹은 저압화학적 기상증착(LPCVD) 방법으로 100Å 내지 200Å 두께의 제1규소산화막(22)을 형성한 후 300Å 내지 500Å 두께의 규소질화막(23)을 형성하는 단계와, 상기 저압화학적기상증착방법으로 제2규소산화막을 100nm 내지 150nm의 두께로 증착한 후 반응성이온식각방법으로 상기 제2규소산화막을 식각하여 측벽산화막(24)을 형성하는 단계와, 다소 묽은 감광막(25)을 도포하는 단계와, 상기 반응성이온식각방법으로 상기 게이트(21)의 상부 감광막을 식각하여 상기 측벽산화막(24)을 노출시킨 후 불화수소용액으로 상기 측벽산화막(24)을 식각하여 노출되는 부위(27)에 붕소를 이온주입한 다음 남은 감광막(26)을 제거하고 급속열처리 방법 또는 열확산방법으로 p영역(28)을 형성하는 단계 및, 인산용액으로 상기 제1규소산화막(22)을 식각하는 단계를 포함하는 것을 특징으로 하는 엔모스 트랜지스터의 제조방법.After the field oxide film 19 is formed on the silicon substrate 18, the thermal oxide film and the n + polysilicon thin film are sequentially formed, and then the gate 21 and the gate oxide film 20 are sequentially formed by a lithography method. Alternatively, in the fabrication method of an MOS transistor in which the LDD 8 and the source and drain 31 are formed by a rapid thermal treatment method, a first silicon oxide film having a thickness of 100 to 200 Å by a thermal oxidation method or a low pressure chemical vapor deposition (LPCVD) method. Forming a silicon nitride film 23 having a thickness of 300 mW to 500 mW after the formation of the second layer; and depositing a second silicon oxide film with a thickness of 100 nm to 150 nm by the low pressure chemical vapor deposition method, followed by reactive ion etching. Etching the second silicon oxide film to form the sidewall oxide film 24, applying a slightly diluted photosensitive film 25, and etching the upper photosensitive film of the gate 21 by the reactive ion etching method. After exposing the sidewall oxide layer 24, boron is ion implanted into the exposed portion 27 by etching the sidewall oxide layer 24 with a hydrogen fluoride solution, and then removing the remaining photoresist layer 26. Forming a p region (28) and etching the first silicon oxide film (22) with a phosphoric acid solution. 제1항에 있어서, 상기 급속열처리방법으로 상기 p영역(28)을 형성하는 경우의 열처리온도는 950℃ 내지 1050℃ 이고, 열처리 시간은 1분 내지 2분인 것을 특징으로 하는 엔모스 트랜지스터의 제조방법.The method of claim 1, wherein the heat treatment temperature in the case of forming the p region 28 by the rapid thermal treatment method is 950 ° C to 1050 ° C, and the heat treatment time is 1 minute to 2 minutes. . 제1항에 있어서, 상기 열확산방법으로 상기 p영역(28)을 형성하는 경우의 온도는 900℃ 내지 950℃이고, 열처리 시간은 10분 내지 60분인 것을 특징으로 하는 엔무스 트랜지스터의 제조방법.The method of claim 1, wherein the temperature in the case of forming the p region (28) by the thermal diffusion method is 900 ℃ to 950 ℃, heat treatment time is 10 minutes to 60 minutes. 제1항에 있어서, 상기 p영역(28)의 접합깊이는 0.2㎛ 내지 0.3㎛이고, 농도는 5×1016-3내지 1×1017-3인 것은 특징으로 하는 엔모스 트랜지스터의 제조방법.The NMOS transistor according to claim 1, wherein the junction depth of the p region 28 is 0.2 µm to 0.3 µm, and the concentration is 5x10 16 cm -3 to 1x10 17 cm -3 . Way. 제1항에 있어서, 상기 노출된 부위(27)에 상기 붕소를 이온주입할 때 주입도오스는 3×1012-2내지 6×1012-2이고 주입에너지는 350KeV 내지 60KeV인 것은 특징으로 하는 엔모스 트랜지스터의 제조방법.The method of claim 1, wherein the implantation dose is 3 × 10 12 cm −2 to 6 × 10 12 cm −2 and the implantation energy is 350 KeV to 60 KeV when the boron is ion implanted into the exposed portion 27. A manufacturing method of an NMOS transistor. 펀치드루우전압을 높이기 위한 p영역(28)이 채널과 중첩하는 드레인(31)의 게이트(21) 부근 가장자리에만 좁게 형성된 것을 특징으로 하는 엔모스 트랜지스터.An NMOS transistor, characterized in that the p region (28) for increasing the punch draw voltage is formed narrowly only at the edge near the gate (21) of the drain (31) overlapping the channel. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910018989A 1991-10-28 1991-10-28 N-MOS transistor and manufacturing method thereof KR930009125A (en)

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