KR20060090275A - 수직 스플릿 게이트형 nrom 메모리를 위한 장치 및방법 - Google Patents
수직 스플릿 게이트형 nrom 메모리를 위한 장치 및방법 Download PDFInfo
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- KR20060090275A KR20060090275A KR1020067009770A KR20067009770A KR20060090275A KR 20060090275 A KR20060090275 A KR 20060090275A KR 1020067009770 A KR1020067009770 A KR 1020067009770A KR 20067009770 A KR20067009770 A KR 20067009770A KR 20060090275 A KR20060090275 A KR 20060090275A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
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- YAIQCYZCSGLAAN-UHFFFAOYSA-N [Si+4].[O-2].[Al+3] Chemical compound [Si+4].[O-2].[Al+3] YAIQCYZCSGLAAN-UHFFFAOYSA-N 0.000 claims 1
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/20—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels
- H10B41/23—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels
- H10B41/27—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/792—Field effect transistors with field effect produced by an insulated gate with charge trapping gate insulator, e.g. MNOS-memory transistors
- H01L29/7926—Vertical transistors, i.e. transistors having source and drain not in the same horizontal plane
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/792—Field effect transistors with field effect produced by an insulated gate with charge trapping gate insulator, e.g. MNOS-memory transistors
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- G—PHYSICS
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- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/04—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
- G11C16/0466—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells with charge storage in an insulating layer, e.g. metal-nitride-oxide-silicon [MNOS], silicon-oxide-nitride-oxide-silicon [SONOS]
- G11C16/0475—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells with charge storage in an insulating layer, e.g. metal-nitride-oxide-silicon [MNOS], silicon-oxide-nitride-oxide-silicon [SONOS] comprising two or more independent storage sites which store independent data
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Abstract
Description
Claims (25)
- 수직 NROM 메모리 셀로서,각각이 소스/드레인 영역을 갖는 복수의 산화물 필러(oxide pillar)들 -트렌치가 각각의 산화물 필러 간에 형성됨- 과,각각의 산화물 필러 쌍 간에 형성된 제어 게이트와,각각이 상기 제어 게이트와 각각의 산화물 필러 간에 형성된 복수의 프로그램 게이트 -각각의 프로그램 게이트는 상기 산화물 필러 측벽을 따라 연장함- 와,복수의 게이트 절연체 층 -각각의 게이트 절연체 층은 각각의 프로그램 게이트와 인접한 산화물 필러 간에 형성되고, 각각의 게이트 절연체 층은 적어도 하나의 전하를 포획(trapping)하기 위한 구조를 가짐-을 포함하는 수직 NROM 메모리 셀.
- 제1항에 있어서, 상기 소스/드레인 영역은 상기 각각의 필러의 상부에 형성된 수직 NROM 메모리 셀.
- 제1항에 있어서, 상기 복수의 게이트 절연체는 질화물층이 상기 전하 포획 구조가 되는 식으로 복합 산화물-질화물-산화물(composite oxide-nitride-oxide) 구조로 구성되는 수직 NROM 메모리 셀.
- 제1항에 있어서, 상기 제어 게이트와 인접한 프로그램 게이트들 간에 형성되고 상기 트렌치의 저부를 따라 있는 실리콘 산화물 게이트 절연체를 더 포함하는 수직 NROM 메모리 셀.
- 제1항에 있어서, 각각의 게이트 절연체 층은 산화물-질화물-알루미늄 산화물(oxide-nitride-aluminum oxide) 복합층, 산화물-알루미늄 산화물-산화물(oxide-aluminum oxide-oxide) 복합층, 또는 산화물-실리콘 옥시탄화물-산화물(oxide-silicon oxycarbide-oxide) 복합층 중의 하나로 구성되는 복합층인 수직 NROM 메모리 셀.
- 제1항에 있어서, 각각의 게이트 절연체층은, 습식 산화법에 의해 형성되고 어닐링되지 않은 실리콘 산화물들, 실리콘 나노입자들을 함유한 고농도 실리콘 산화물(silicon rich oxide)들, 실리콘 산질화물(silicon oxynitride) 층들, 고농도 실리콘 알루미늄 산화물 절연체(silicon-rich aluminum oxide insulator)들, 실리콘 옥시탄화물 절연체들, 또는 실리콘 탄화물의 나노 입자들을 함유한 실리콘 산화물 절연체들 중의 하나로 구성된 비복합층인 수직 NROM 메모리 셀.
- 제1항에 있어서, 각각의 게이트 절연체는, 실리콘, 질소, 알루미늄, 티타늄, 탄탈(tantalum), 하프늄, 란탄(lanthanum) 또는 지르코늄 중의 하나 또는 그 이상으로 된 비화학량론적 단일층(non-stoichiometric single layer)들로 구성된 수직 NROM 메모리 셀.
- 수직 NROM 메모리 셀로서,각각이 그 상부에 형성된 소스/드레인 영역을 갖는 복수의 산화물 필러 -트렌치가 각각의 산화물 필러 쌍 간에 형성됨 - 와,각각의 산화물 필러 쌍 간에 형성된 제어 게이트와,각각이 상기 제어 게이트와 각각의 산화물 필러 간에 형성된 복수의 프로그램 게이트 -각각의 프로그램 게이트는 상기 산화물 필러 측벽을 따라 연장함- 와,복수의 게이트 절연체 층 - 각각의 게이트 절연체 층은 각각의 프로그램 게이트와 상기 인접한 산화물 필러 측벽 간에 형성되고, 각각의 게이트 절연체 층은 적어도 하나의 전하를 포획하기 위한 구조를 가짐- 과,상기 제어 게이트와 각각의 인접 프로그램 게이트 간에 형성된 산화물 인터폴리 층(oxide interpoly layer)을 포함하는 수직 NROM 메모리 셀.
- 제8항에 있어서, 복수의 전하가 상기 게이트 절연체 층의 상기 제어 게이트의 아래에 포획될 수 있는 식으로 상기 트렌치의 저부 상에 형성된 게이트 절연체 층을 더 포함하는 수직 NROM 메모리 셀.
- 제9항에 있어서, 상기 복수의 전하는 상기 제어 게이트의 아래에 상기 게이트 절연체 층의 질화물층 내에 포획되는 수직 NROM 메모리 셀.
- 수직 NROM 메모리 셀들의 어레이로서,각각이 그 상부에 형성된 소스/드레인 영역을 갖는 복수의 산화물 필러 -트렌치가 각각의 산화물 필러 쌍 간에 형성됨- 와,복수의 제어 게이트 -각각의 제어 게이트는 각각의 산화물 필러 쌍 간의 트렌치 내에 형성됨- 와,각각이 제1 제어 게이트와 각각의 산화물 필러 간에 형성된 복수의 프로그램 게이트 -각각의 프로그램 게이트는 상기 산화물 필러 측벽을 따라 연장함 - 와,복수의 게이트 절연체 층 - 각각의 게이트 절연체 층은, 각각의 프로그램 게이트와 인접한 산화물 필러 간에 형성되고, 적어도 하나의 전하를 포획하기 위한 구조를 가짐- 과,상기 복수의 제어 게이트를 결합하는 워드선을 포함하는 어레이.
- 제11항에 있어서,각각의 제어 게이트와 각각의 프로그램 게이트 간에 있는 산화물 인터폴리 재료와,각각의 트렌치의 저부 상에 있고, 각각의 제어 게이트의 아래에 복수의 전하 를 저장하기 위한 구조를 포함하는 게이트 절연체 층을 더 포함하는 어레이.
- 제11항에 있어서, 각각의 소스/드레인 영역은 n 도전형 반도체 재료로 구성되는 어레이.
- 컴퓨터 시스템으로서,중앙 처리부(CPU)와,상기 CPU에 결합된, 수직 NRM 메모리 셀들의 어레이로서,각각이 그 상부에 형성된 소스/드레인 영역을 갖는 복수의 산화물 필러 -트렌치가 각각의 산화물 필러 쌍 간에 형성됨- 와,복수의 제어 게이트 -각각의 제어 게이트는 각각의 산화물 필러 쌍 간의 트렌치 내에 형성됨- 와,각각이 제1 제어 게이트와 각각의 산화물 필러 간에 형성된 복수의 프로그램 게이트 -각각의 프로그램 게이트는 상기 산화물 필러 측벽을 따라 연장함 - 와,복수의 게이트 절연체 층 - 각각의 게이트 절연체 층은, 각각의 프로그램 게이트와 인접한 산화물 필러 간에 형성되고, 적어도 하나의 전하를 포획하기 위한 구조를 가짐- 과,상기 복수의 제어 게이트를 결합하는 워드선을 포함하는 어레이를 포함하는 컴퓨터 시스템.
- 제14항에 있어서, 상기 각각의 산화물 필러의 소스/드레인 영역은 상기 수직 NROM 메모리 셀의 동작 방향에 응답하여 소스 접속부 또는 드레인 접속부 중의 어느 하나로 기능하는 컴퓨터 시스템.
- 제14항에 있어서, 각각의 제2 소스/드레인 영역은 N+ 도전형 실리콘 재료로 구성되는 컴퓨터 시스템.
- 수직 NROM 스플릿 게이트 트랜지스터를 형성하는 방법으로서,기판 위에 제1 주상 구조(a first columnar structure)를 형성하는 단계 -상기 제1 주상 구조는 상기 기판과는 다른 제1 도전형의 도핑된 영역을 가짐- 와,상기 제1 주상 구조로부터 공간 분리되어 상기 제1 주상 구조와의 사이에 트렌치를 형성하는 제2 주상 구조 -상기 제2 주상 구조는 상기 제1 도전형의 도핑된 영역을 가짐 - 를 상기 기판 위에 형성하는 단계와,상기 트렌치의 저부 상에 산화물 재료를 형성하는 단계와,상기 제1 및 제2 주상 구조 간에 폴리실리콘 제어 게이트 구조를 형성하는 단계와,상기 제1 주상 구조의 측벽을 따라 상기 트렌치 내에 제1 게이트 절연체 층을 형성하고, 상기 제2 주상 구조의 측벽을 따라 상기 트렌치 내에 제2 게이트 절 연체 층을 형성하는 단계와,상기 제1 게이트 절연체 층과 상기 제어 게이트 구조 간에 및 상기 제2 게이트 절연체 층과 상기 제어 게이트 구조 간에 폴리실리콘 프로그램 게이트 구조를 개재(interpose)시키는 단계를 포함하는 방법.
- 제17항에 있어서, 상기 제어 게이트 구조와 상기 프로그램 게이트 구조들 간에 산화물 인터폴리 영역을 형성하는 단계를 더 포함하는 방법.
- 제17항에 있어서, 상기 제1 도전형은 N+ 이며, 상기 기판은 P+ 도전형을 갖는 방법.
- 제17항에 있어서, 상기 제1 및 제2 게이트 절연체 층을 형성하는 단계는 복합 구조를 형성하는 것을 포함하는 방법.
- 수직 NROM 스플릿 게이트 트랜지스터를 형성하는 방법으로서,기판 위에 제1 주상 구조를 형성하는 단계 -상기 제1 주상 구조는 상기 기판과는 다른 제1 도전형의 도핑된 영역을 가짐- 와,상기 제1 주상 구조로부터 공간 분리되어 있고 자신과 상기 제1 주상 구조 간에 트렌치를 형성하는, 상기 기판 위의 제2 주상 구조 -상기 제2 주상 구조는 상기 제1 도전형의 도핑된 영역을 가짐 - 와,상기 트렌치의 저부 상에 저부 게이트 절연체 층을 형성하는 단계와,상기 제1 및 제2 주상 구조 간에 폴리실리콘 제어 게이트 구조를 형성하는 단계와,상기 제1 주상 구조의 측벽을 따라 상기 트렌치 내에 제1 게이트 절연체 층을 형성하고, 상기 제2 주상 구조의 측벽을 따라 상기 트렌치 내에 제2 게이트 절연체 층을 형성하는 단계와,상기 제1 게이트 절연체 층과 상기 제어 게이트 구조 간에 및 상기 제2 게이트 절연체 층과 상기 제어 게이트 구조 간에 폴리실리콘 프로그램 게이트 구조를 개재시키는 단계를 포함하는 방법.
- 제21항에 있어서, 상기 저부, 제1, 및 제2 게이트 절연체 층은 복합 구조인 방법.
- 제22항에 있어서, 상기 복합 구조는 산화물-질화물-알루미늄 산화물 복합층, 산화물-알루미늄 산화물-산화물 복합층, 또는 산화물-실리콘 옥시탄화물-산화물 복합층 중의 하나로 구성되는 방법.
- 제21항에 있어서, 상기 저부, 제1, 및 제2 게이트 절연체 층은, 실리콘, 질소, 알루미늄, 티타늄, 탄탈, 하프늄, 란탄 또는 지르코늄 중의 하나 또는 그 이상으로 된 비화학량론적 단일층들로 구성된 방법.
- 제21항에 있어서, 상기 저부, 제1, 및 제2 게이트 절연체 층은, 습식 산화법에 의해 형성되고 어닐링되지 않은 실리콘 산화물들, 실리콘 나노입자들을 함유한 고농도 실리콘 산화물들, 실리콘 산질화물 층들, 고농도 실리콘 알루미늄 산화물 절연체들, 실리콘 옥시탄화물 절연체들, 실리콘 탄화물의 나노 입자들을 함유한 실리콘 산화물 절연체들 중의 하나로 구성된 비복합층인 방법.
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-
2003
- 2003-11-21 US US10/719,772 patent/US6979857B2/en not_active Expired - Lifetime
-
2004
- 2004-11-16 CN CN2004800341496A patent/CN1883047B/zh active Active
- 2004-11-16 WO PCT/US2004/038259 patent/WO2005053020A1/en not_active Application Discontinuation
- 2004-11-16 EP EP04811107A patent/EP1685593A1/en not_active Withdrawn
- 2004-11-16 JP JP2006541305A patent/JP2007534160A/ja active Pending
- 2004-11-16 KR KR1020067009770A patent/KR100789092B1/ko active IP Right Grant
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TW200524083A (en) | 2005-07-16 |
CN1883047B (zh) | 2012-07-11 |
KR100789092B1 (ko) | 2007-12-26 |
US6979857B2 (en) | 2005-12-27 |
CN1883047A (zh) | 2006-12-20 |
JP2007534160A (ja) | 2007-11-22 |
US20050001258A1 (en) | 2005-01-06 |
WO2005053020A1 (en) | 2005-06-09 |
EP1685593A1 (en) | 2006-08-02 |
TWI245369B (en) | 2005-12-11 |
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