KR960002829A - Method for forming storage electrode of semiconductor device - Google Patents

Method for forming storage electrode of semiconductor device Download PDF

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Publication number
KR960002829A
KR960002829A KR1019940012567A KR19940012567A KR960002829A KR 960002829 A KR960002829 A KR 960002829A KR 1019940012567 A KR1019940012567 A KR 1019940012567A KR 19940012567 A KR19940012567 A KR 19940012567A KR 960002829 A KR960002829 A KR 960002829A
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South Korea
Prior art keywords
storage electrode
forming
mask
etching
electrode mask
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KR1019940012567A
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Korean (ko)
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KR0154154B1 (en
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이호석
정재갑
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김주용
현대전자산업 주식회사
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Publication of KR0154154B1 publication Critical patent/KR0154154B1/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L28/00Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
    • H01L28/40Capacitors
    • H01L28/60Electrodes
    • H01L28/82Electrodes with an enlarged surface, e.g. formed by texturisation
    • H01L28/90Electrodes with an enlarged surface, e.g. formed by texturisation having vertical extensions
    • H01L28/91Electrodes with an enlarged surface, e.g. formed by texturisation having vertical extensions made by depositing layers, e.g. by depositing alternating conductive and insulating layers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L28/00Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
    • H01L28/40Capacitors
    • H01L28/60Electrodes
    • H01L28/75Electrodes comprising two or more layers, e.g. comprising a barrier layer and a metal layer

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Semiconductor Memories (AREA)

Abstract

본 발명은 반도체소자의 저장전극 형성방법에 관한 것으로, 반도체소자가 고집적화됨에 따라 소자의 크기는 작아지고 더욱 많은 정전용량을 요구하게 되었으나 종래 기술에서는 정전용량의 문제 외에 많은 한계를 갖게 하였다. 따라서, 본 발명은 종래의 마스크 오버랩 마진을 이용하고, 하부층을 평탄화시켜 안정된 식각공정을 가능하게 하고, 감광막으로 형성한 마스크를 교대로 사용하는 작업과 등방성 건식식각을 실시하여 디자인룰상의 한계를 극복하고 비등방성 건식식각을 이용하여 표면적의 증가된 다중실린더 구조의 저장전극을 형성함으로써 반도체소자의 생산성 및 신뢰성을 향상시키며 반도체소자의 고집적화를 가능하게 하는 기술이다.The present invention relates to a method for forming a storage electrode of a semiconductor device. As the semiconductor device is highly integrated, the size of the device becomes smaller and more capacitance is required, but in the prior art, there are many limitations besides the problem of capacitance. Accordingly, the present invention overcomes the limitations of the design rule by using a conventional mask overlap margin, flattening the lower layer to enable a stable etching process, alternately using a mask formed of a photosensitive film, and performing isotropic dry etching. By using anisotropic dry etching to form a storage electrode having an increased surface area of the multi-cylinder structure to improve the productivity and reliability of the semiconductor device and to enable high integration of the semiconductor device.

Description

반도체소자의 저장전극 형성방법Method for forming storage electrode of semiconductor device

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

제1도 내지 제6도는 본 발명의 실시예에 의한 반도체소자의 저장전극 형성공정을 도시한 단면도.1 to 6 are cross-sectional views showing a storage electrode forming process of a semiconductor device according to an embodiment of the present invention.

Claims (9)

반도체소자의 저장전극 형성방법에 있어서, 반도체기판 상부에 하부절연층에 형성하고 그 상부에 제1절연막을 일정두께 증착한 다음, 상기 반도체기판의 예정된 부위를 노출시키는 콘택홀을 형성하고 상기 콘택홀을 통하여 상기 노출된 반도체기판에 접속되도록 제1도전체를 일정두께 증착한 다음, 마스크공정을 실시하고 그 상부에 제2절연막을 증착한 다음, 전체구조상부에 제2도전체를 일정두께 증착하고 그 상부에 제1저장전극 마스크를 형성하는 공정과, 상기 제1저장전극 마스크를 이용하여 등방성식각을 실시함으로써 제2도전체패턴을 형성하고 그 상부에 제3절연막 및 제3도전체를 순차적으로 증착한 다음, 그 상부에 제2저장전극 마스크를 형성하는 공정과, 사익 제2저장전극 마스크를 사용하여 상기 제3전도체를 등방성식각함으로써 제3도전체패턴을 형성하고 상기 제2저장전극 마스크를 제거한 다음, 전체구조상부에 제3저장전극 마스크를 형성하는 공정과, 상기 제3저장전극 마스크를 사용하여 상기 제3도전체패턴과 제3절연막 그리고 제2절연막의 일정두께를 부분식각한 다음, 상기 제3저장전극 마스크를 제거하는 공정과, 상기 남아있는 제3도전체패턴을 마스크로 하고 상기 제2도전체패턴을 마스크 및 식각장벽을 하여 전면식각을 실시함으로써 제3절연막패턴과 제2절연막패턴을 형성하는 공정과, 전체구조상부에 제4도전체를 일정두께 증착하고 상기 제2,3절연막패턴이 노출되도록 이방성식각공정을 실시하여 제4도전체 스페이서를 형성한 다음, 습식방법으로 상기 제2,3절연막을 제거하여 다중실린더형 저장전극을 형성하는 공정을 포함하는 반도체소자의 저장전극 형성방법.A method of forming a storage electrode of a semiconductor device, the method comprising: forming a lower insulating layer on a semiconductor substrate, depositing a first insulating layer on the semiconductor substrate, and forming a contact hole exposing a predetermined portion of the semiconductor substrate, and forming the contact hole. Depositing a first conductor to a predetermined thickness so as to be connected to the exposed semiconductor substrate through a mask, performing a mask process, depositing a second insulating layer thereon, and depositing a second conductor on the entire structure. Forming a first conductive electrode mask thereon, and isotropically etching using the first storage electrode mask to form a second conductive pattern, and sequentially forming a third insulating film and a third conductor thereon. After depositing, forming a second storage electrode mask thereon; and isotropically etching the third conductor by using a second storage electrode mask. Forming a pattern, removing the second storage electrode mask, and then forming a third storage electrode mask on the entire structure; and using the third storage electrode mask, the third conductive pattern, the third insulating layer, and the third storage electrode mask. 2) etching a predetermined thickness of the insulating layer, and then removing the third storage electrode mask; and etching the entire surface using the remaining third conductive pattern as a mask and the second conductive pattern as a mask and an etching barrier. Forming a third insulating film pattern and a second insulating film pattern, depositing a fourth conductor on the entire structure to a predetermined thickness, and performing an anisotropic etching process to expose the second and third insulating film patterns. And forming a multi-cylinder type storage electrode by removing the second and third insulating layers by a wet method after forming the sieve spacer. 제1항에 있어서, 상기 1,4 도전체는 도핑된 다결정실리콘으로 형성하는 것을 특징으로 하는 반도체소자의 저장전극 형성방법.The method of claim 1, wherein the 1,4 conductor is formed of doped polycrystalline silicon. 제1항에 있어서, 상기 2,3도전체는 도핑되지 않은 다결정실리콘으로 형성하는 것을 특징으로 하는 반도체소자의 저장전극 형성방법.The method of claim 1, wherein the second and third conductors are formed of undoped polysilicon. 제1항에 있어서, 상기 2,3절연막은 실리콘이 함유된 산화막으로 형성하는 것을 특징으로 하는 반도체소자의 저장전극 형성방법.The method of claim 1, wherein the second and third insulating layers are formed of an oxide film containing silicon. 제1항에 있어서, 상기 제1,3저장전극 마스크는 포지티브형 감광막을 이용하여 형성하며, 상기 제2저장전극 마스크는 네가티브형 감광막으로 형성하는 것을 특징으로 하는 반도체소자의 저장전극 형성방법.The method of claim 1, wherein the first and third storage electrode masks are formed using a positive photosensitive film, and the second storage electrode mask is formed of a negative photosensitive film. 제1항에 있어서, 상기 제2,3도전체패턴의 폭은 0.4㎛ 이하로 하는 것을 특징으로 하는 반도체소자의 저장전극 형성방법.The method of claim 1, wherein a width of the second and third conductive patterns is 0.4 μm or less. 제1항에 있어서, 상기 제2저장전극 마스크는 상기 제1저장전극 마스크와 같은 레티클을 사용하되 네가티브형 감광막을 사용하여 형성되는 것을 특징으로 하는 반도체소자의 저장전극 형성방법.The method of claim 1, wherein the second storage electrode mask is formed using the same reticle as the first storage electrode mask but using a negative photosensitive film. 제1항에 있어서, 상기 부분식각은 다결정실리콘과 산화막의 식각선택비가 1:1정도인 SF4또는 NF3를 기본으로 하는 식각물질로 실시하는 것을 특징으로 하는 반도체소자의 저장전극 형성방법.The method of claim 1, wherein the partial etching is performed using an etching material based on SF 4 or NF 3 having an etch selectivity ratio of polysilicon and an oxide layer of about 1: 1. 제1항 또는 제8항에 있어서, 상기 부분식각은 상기 제1절연막의 상부에 증착된 제1도전체의 두께만큼 식각하는 것을 특징으로 하는 반도체소자의 저장전극 형성방법.The method of claim 1 or 8, wherein the partial etching is performed by etching the thickness of the first conductor deposited on the first insulating layer. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940012567A 1994-06-03 1994-06-03 Storage electrode fabrication method KR0154154B1 (en)

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KR1019940012567A KR0154154B1 (en) 1994-06-03 1994-06-03 Storage electrode fabrication method

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KR1019940012567A KR0154154B1 (en) 1994-06-03 1994-06-03 Storage electrode fabrication method

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KR0154154B1 KR0154154B1 (en) 1998-10-15

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