JP5038580B2 - 非揮発性sonsnosメモリ - Google Patents
非揮発性sonsnosメモリ Download PDFInfo
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- JP5038580B2 JP5038580B2 JP2003345839A JP2003345839A JP5038580B2 JP 5038580 B2 JP5038580 B2 JP 5038580B2 JP 2003345839 A JP2003345839 A JP 2003345839A JP 2003345839 A JP2003345839 A JP 2003345839A JP 5038580 B2 JP5038580 B2 JP 5038580B2
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- H10D64/01302—Manufacture or treatment of electrodes having a conductor capacitively coupled to a semiconductor by an insulator the insulator being formed after the semiconductor body, the semiconductor being silicon
- H10D64/01332—Making the insulator
- H10D64/01336—Making the insulator on single crystalline silicon, e.g. chemical oxidation using a liquid
- H10D64/01342—Making the insulator on single crystalline silicon, e.g. chemical oxidation using a liquid by deposition, e.g. evaporation, ALD or laser deposition
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- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/30—EEPROM devices comprising charge-trapping gate insulators characterised by the memory core region
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- 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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- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/68—Floating-gate IGFETs
- H10D30/681—Floating-gate IGFETs having only two programming levels
- H10D30/684—Floating-gate IGFETs having only two programming levels programmed by hot carrier injection
- H10D30/685—Floating-gate IGFETs having only two programming levels programmed by hot carrier injection from the channel
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- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/68—Floating-gate IGFETs
- H10D30/687—Floating-gate IGFETs having more than two programming levels
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- H—ELECTRICITY
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- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/68—Floating-gate IGFETs
- H10D30/688—Floating-gate IGFETs programmed by two single electrons
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/68—Floating-gate IGFETs
- H10D30/6891—Floating-gate IGFETs characterised by the shapes, relative sizes or dispositions of the floating gate electrode
- H10D30/6893—Floating-gate IGFETs characterised by the shapes, relative sizes or dispositions of the floating gate electrode wherein the floating gate has multiple non-connected parts, e.g. multi-particle floating gate
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- H—ELECTRICITY
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/031—Manufacture or treatment of data-storage electrodes
- H10D64/035—Manufacture or treatment of data-storage electrodes comprising conductor-insulator-conductor-insulator-semiconductor structures
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/031—Manufacture or treatment of data-storage electrodes
- H10D64/037—Manufacture or treatment of data-storage electrodes comprising charge-trapping insulators
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/66—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes
- H10D64/68—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator
- H10D64/681—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator having a compositional variation, e.g. multilayered
- H10D64/685—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator having a compositional variation, e.g. multilayered being perpendicular to the channel plane
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/66—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes
- H10D64/68—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator
- H10D64/691—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator comprising metallic compounds, e.g. metal oxides or metal silicates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/66—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes
- H10D64/68—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator
- H10D64/693—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator the insulator comprising nitrogen, e.g. nitrides, oxynitrides or nitrogen-doped materials
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2216/00—Indexing scheme relating to G11C16/00 and subgroups, for features not directly covered by these groups
- G11C2216/02—Structural aspects of erasable programmable read-only memories
- G11C2216/06—Floating gate cells in which the floating gate consists of multiple isolated silicon islands, e.g. nanocrystals
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- Microelectronics & Electronic Packaging (AREA)
- Semiconductor Memories (AREA)
- Non-Volatile Memory (AREA)
Description
図2を参照すれば、ソース電極33とドレーン電極35とが形成された基板31の上部にゲート電極37が位置し、基板31とゲート電極37の間に絶縁膜として酸化シリコン(silicon oxide)膜41,45が形成され、酸化シリコン膜41,45の間に電子をトラップする非伝導性誘電膜43が介設される。
Chan et al,IEEE Electron Device Letters,Vol.8,No.3,PP93,1987
図3を参照すれば、本発明の第1実施形態によるSONSNOSメモリでは、ソース電極103及びドレーン電極105が形成されている基板101の上部にゲート電極107が配置され、基板101とゲート電極107間に電子をトラップするための多層のONSNO(Oxide Nitride Silicon Nitride Oxide)膜が介設される。ソース103とドレーン電極105の間には電子のチャンネルが形成され、ゲート電極107はSiなどの半導体または金属を使用して形成できる。
参照符号121は基板、123はソース電極、125はドレーン電極、127はゲート電極、131aは第1オキシド膜、131bは第2オキシド膜、133aは第1ナイトライド膜、133bは第2ナイトライド膜、135はシリコン量子ドットを示す。本発明の第2実施形態によるSONSNOSメモリは本発明の第1実施形態によるSONSNOSメモリと類似した構造を有するが、シリコン膜115の代わりにシリコン量子ドット135を備える点が相違する。ここで、シリコン量子ドット135の代わりにAuまたはAlからなる金属量子ドットであってもよい。
シリコン量子ドット135は金属量子ドットに替えることができ、シリコン量子ドット135または金属量子ドットは物理的または化学的方法で製造できる。
図5を参照すれば、基板201とゲート電極207間にONSNSNO膜が介設されている。基板201上には、ソース及びドレーン電極203,205が形成されている。ONSNSNO膜は、基板201の上面とゲート電極207の底面とにそれぞれ配置された第1オキシド膜211aと第2オキシド膜211b、第1オキシド膜211aの上面と第2オキシド膜211bの底面とにそれぞれ配列された第1ナイトライド膜213aと第2ナイトライド膜213b、第1ナイトライド膜213aの上面と第2ナイトライド膜213bの底面とにそれぞれ形成された第1シリコン膜215aと第2シリコン膜215b及び第1シリコン膜215aと第2シリコン膜215bの間に介設された第3ナイトライド膜213cを備える。
図6を参照すれば、本発明の第4実施形態による多層SONSNOSメモリは、本発明の第3実施形態によるマルチSONSNOSメモリと類似した構造を有し、ただし第1及び第2シリコン膜215a,215bの代わりに第1及び第2シリコン量子ドット235a,235bを備えることが相違する。ここで、第1及び第2シリコン量子ドット235a,235bの代わりに第1及び第2金属量子ドットを形成できる。金属量子ドットはAuまたはAlからなる。
例えば、本発明が属する技術分野で当業者ならば、本発明の技術的思想によりナノ量子ドットを形成するナノ粒子をあらかじめ多様な方法で製造して単電子トランジスタに利用できる。ゆえに、本発明の範囲は説明された実施形態により定められるのではなくして特許請求範囲に記載された技術的思想により定められるのである。
103 ソース電極
105 ドレイン電極
107 ゲート電極
111a 第1オキサイド膜
111b 第2オキサイド膜
113a 第1ナイトライド膜
113b 第2ナイトライド膜
115 シリコン膜
Claims (2)
- 所定間隔離隔されたソース及びドレーン電極並びに前記ソース及びドレーン電極間に電子が移動するチャンネルを含む半導体基板と、前記半導体基板の上部に前記チャンネルからの電子の流入を制御するゲート電極とを備えるメモリにおいて、
前記半導体基板のチャンネル上に積層される第1絶縁膜及び第2絶縁膜と、
前記第1絶縁膜の上部と第2絶縁膜の下部との間に形成される複数のSi3N4膜と、
前記複数のSi3N4膜の間ごとに介設されると共に、前記チャンネルから電子が流入する複数のシリコン膜とを含み、
前記複数のSi 3 N 4 膜の内、最下及び最上のものは、前記第1絶縁膜の上面及び第2絶縁膜の底面に接触して形成され、
前記ドレーン電極に移動する前記電子は、前記ゲート電極に形成される電場によって前記第1絶縁膜をトンネリングして、前記複数のSi3N4膜と前記シリコン膜の界面にトラップされるか、前記シリコン膜の欠陥にトラップされる、
ことを特徴とする多層の非揮発性SONSNOSメモリ。 - 前記第1及び第2絶縁膜は、それぞれSiO2、Al2O3、TaO2及びTiO2から構成されるグループから選択された少なくとも一つの物質から形成されることを特徴とする請求項1に記載の多層の非揮発性SONSNOSメモリ。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2002-062482 | 2002-10-14 | ||
| KR10-2002-0062482A KR100446632B1 (ko) | 2002-10-14 | 2002-10-14 | 비휘발성 sonsnos 메모리 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004134796A JP2004134796A (ja) | 2004-04-30 |
| JP5038580B2 true JP5038580B2 (ja) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003345839A Expired - Fee Related JP5038580B2 (ja) | 2002-10-14 | 2003-10-03 | 非揮発性sonsnosメモリ |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6936884B2 (ja) |
| EP (1) | EP1411555B1 (ja) |
| JP (1) | JP5038580B2 (ja) |
| KR (1) | KR100446632B1 (ja) |
| CN (1) | CN1326244C (ja) |
| DE (1) | DE60309806T2 (ja) |
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| KR19990030641A (ko) * | 1997-10-02 | 1999-05-06 | 구본준 | 비휘발성 메모리 소자 |
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| JP2003068893A (ja) * | 2001-08-28 | 2003-03-07 | Hitachi Ltd | 不揮発性記憶素子及び半導体集積回路 |
| JP4056817B2 (ja) * | 2002-07-23 | 2008-03-05 | 光正 小柳 | 不揮発性半導体記憶素子の製造方法 |
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| EP1411555A3 (en) | 2005-02-02 |
| KR20040033406A (ko) | 2004-04-28 |
| US20040079983A1 (en) | 2004-04-29 |
| CN1326244C (zh) | 2007-07-11 |
| EP1411555A2 (en) | 2004-04-21 |
| KR100446632B1 (ko) | 2004-09-04 |
| EP1411555B1 (en) | 2006-11-22 |
| DE60309806T2 (de) | 2007-09-13 |
| JP2004134796A (ja) | 2004-04-30 |
| DE60309806D1 (de) | 2007-01-04 |
| US6936884B2 (en) | 2005-08-30 |
| CN1490876A (zh) | 2004-04-21 |
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