KR960039366A - Method for manufacturing charge storage electrode of capacitor - Google Patents

Method for manufacturing charge storage electrode of capacitor Download PDF

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Publication number
KR960039366A
KR960039366A KR1019950007849A KR19950007849A KR960039366A KR 960039366 A KR960039366 A KR 960039366A KR 1019950007849 A KR1019950007849 A KR 1019950007849A KR 19950007849 A KR19950007849 A KR 19950007849A KR 960039366 A KR960039366 A KR 960039366A
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KR
South Korea
Prior art keywords
charge storage
storage electrode
polysilicon
etching
forming
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Application number
KR1019950007849A
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Korean (ko)
Inventor
권오성
Original Assignee
김주용
현대전자산업 주식회사
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Application filed by 김주용, 현대전자산업 주식회사 filed Critical 김주용
Priority to KR1019950007849A priority Critical patent/KR960039366A/en
Publication of KR960039366A publication Critical patent/KR960039366A/en

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  • Semiconductor Integrated Circuits (AREA)

Abstract

본 발명은 캐패시터의 전하저장전극 제조방법에 관하여 개시된다.The present invention relates to a method of manufacturing a charge storage electrode of a capacitor.

본 발명은 희생 폴리실리콘 및 산화막을 이용하여 희생 폴리실리콘의 그레인 단위로 식각 마스크 패턴을 형성하고, 이 식각 마스크 패턴을 이용하여 표면부에 다수의 기둥을 갖는 전하저장전극을 제조한다.The present invention forms an etch mask pattern in units of grains of sacrificial polysilicon using sacrificial polysilicon and an oxide film, and manufactures a charge storage electrode having a plurality of pillars on its surface by using the etch mask pattern.

따라서, 본 발명은 제한된 면적에서 유효 표면적이 극대화되어 정전용량을 증대시킬 수 있어 반도체 소자의 고집적화를 가능하게 하며, 별도의 마스크를 사용하지 않고 본 발명의 전하저장전극을 제조하므로 공정의 단순화로 인한 원가절감을 이룰 수 있다.Therefore, the present invention can increase the capacitance by maximizing the effective surface area in a limited area to enable high integration of the semiconductor device, and because the charge storage electrode of the present invention is manufactured without using a separate mask due to the simplification of the process Cost reduction can be achieved.

Description

캐패시터의 전하저장전극 제조방법Method for manufacturing charge storage electrode of capacitor

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1A도 내지 제1E도는 본 발명에 의한 캐패시터의 전하저장전극 제조단계를 도시한 소자의 단면도.1A to 1E are cross-sectional views of a device showing a charge storage electrode manufacturing step of a capacitor according to the present invention.

Claims (5)

캐패시터의 전하저장전극 제조방법에 있어서, 반도체 기판상에 층간 절연막 및 질화막을 순차적으로 형성한 후 콘택홀을 형성하고, 상기 콘택홀을 포함한 상기 질화막상에 전하저장전극용 폴리실리콘을 두껍게 증착하는 단계와, 열산화공정으로 상기 폴리실리콘상에 제1산화막을 형성하는 단계와, 상기 제1산화막상에 희생 폴ㄹ실리콘을 증착하고, 상기 희생 폴리실리콘상에 열산화공정으로 제2산화막을 형성하는 단계와, 상기 제2산화막을 제거한 후, 전하저장전극용 마스크를 사용한 리소그라피 공정 및 식각공정을 실시하고, 상기 제1산화막상에 희생 폴리실리콘이 그레인 단위로 남아있도록 상기 희생 폴리실리콘을 건식식각 방식으로 식각하여 폴리실리콘 패턴을 형성하는 단계와, 상기 폴리실리콘 패턴을 식각 마스크로하여 상기 제1산화막의 노출된 부분을 식각하여 산화막 패턴을 형성하는 단계와, 상기 산화막 패턴을 식각 마스크로 하여 상기 전하저장전극용 폴리실리콘을 일정깊이 식각하여 미로형 트랜치를 형성하므로, 이로인하여 다수의 기둥을 갖는 전하저장전극을 형성하는 단계로 이루어지는 것을 특징으로 하는 캐패시터의 전하저장전극 제조방법.A method of manufacturing a charge storage electrode of a capacitor, comprising: sequentially forming an interlayer insulating film and a nitride film on a semiconductor substrate, forming a contact hole, and thickly depositing polysilicon for a charge storage electrode on the nitride film including the contact hole. And forming a first oxide film on the polysilicon by thermal oxidation, depositing sacrificial polysilicon on the first oxide film, and forming a second oxide film on the sacrificial polysilicon by thermal oxidation. And removing the second oxide layer, performing a lithography process and an etching process using a mask for a charge storage electrode, and dry-etching the sacrificial polysilicon so that sacrificial polysilicon remains in grain units on the first oxide layer. Etching to form a polysilicon pattern, and using the polysilicon pattern as an etching mask, the furnace of the first oxide layer Etching the exposed portion to form an oxide pattern, and etching the polysilicon for the charge storage electrode to a predetermined depth by using the oxide pattern as an etching mask to form a labyrinth trench, thereby forming a charge storage electrode having a plurality of pillars Method for manufacturing a charge storage electrode of a capacitor, characterized in that it comprises the step of forming a. 제1항에 있어서, 상기 전하저장전극용 폴리실리콘은 580 내지 630℃ 온도 범위에서 SiH4개스의 열분해에 의해 LPCVD방법으로 소자에서 원하는 두께보다 두껍게 형성하는 것을 특징으로 하는 캐패시터의 전하저장전극 제조방법.The method of claim 1, wherein the polysilicon for the charge storage electrode is formed in a device thicker than the desired thickness by the LPCVD method by thermal decomposition of SiH 4 gas in the temperature range of 580 to 630 ℃. . 제1항 또는 2항에 있어서, 상기 전하저장전극용 폴리실리콘은 소자에서 원하는 두께가 2000 내지 3000Å일 경우, 상기 제1산화막이 형성두께를 고려하여 200 내지 300Å 더 증착하는 것을 특징으로 하는 캐패시터의 전하저장전극 제조방법.The capacitor of claim 1 or 2, wherein the polysilicon for charge storage electrode is further deposited in an amount of 200 to 300 microseconds in consideration of the formation thickness of the first oxide film when the desired thickness of the device is 2000 to 3000 microseconds. Method for manufacturing a charge storage electrode. 제1항에 있어서, 상기 제1 및 제2산화막은 700 내지 800℃에서 O2및 H2가스에 의한 열산화공정으로 400 내지 600Å두께로 형성하는 것을 특징으로 하는 캐패시터의 전하저장전극 제조방법.The method of claim 1, wherein the first and second oxide films are formed at a thickness of 400 to 600 kPa by a thermal oxidation process using O 2 and H 2 gas at 700 to 800 ° C. 제1항에 있어서, 상기 희생 폴리실리콘은 900 내지 1100Å의 두께로 증착하는 것을 특징으로 하는 캐패시터의 전하저장전극 제조방법.The method of claim 1, wherein the sacrificial polysilicon is deposited to a thickness of 900 to 1100 μs. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950007849A 1995-04-04 1995-04-04 Method for manufacturing charge storage electrode of capacitor KR960039366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950007849A KR960039366A (en) 1995-04-04 1995-04-04 Method for manufacturing charge storage electrode of capacitor

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Application Number Priority Date Filing Date Title
KR1019950007849A KR960039366A (en) 1995-04-04 1995-04-04 Method for manufacturing charge storage electrode of capacitor

Publications (1)

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KR960039366A true KR960039366A (en) 1996-11-25

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