JP2006310757A - フラッシュメモリ素子のゲート形成方法 - Google Patents
フラッシュメモリ素子のゲート形成方法 Download PDFInfo
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- JP2006310757A JP2006310757A JP2006006106A JP2006006106A JP2006310757A JP 2006310757 A JP2006310757 A JP 2006310757A JP 2006006106 A JP2006006106 A JP 2006006106A JP 2006006106 A JP2006006106 A JP 2006006106A JP 2006310757 A JP2006310757 A JP 2006310757A
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000002955 isolation Methods 0.000 claims abstract description 29
- 150000004767 nitrides Chemical class 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000004065 semiconductor Substances 0.000 claims abstract description 10
- 238000001312 dry etching Methods 0.000 claims description 12
- 238000001039 wet etching Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 4
- 238000001459 lithography Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 238000007740 vapor deposition Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract 4
- 238000009499 grossing Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 20
- 238000012545 processing Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/30—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/31051—Planarisation of the insulating layers
- H01L21/31053—Planarisation of the insulating layers involving a dielectric removal step
- H01L21/31055—Planarisation of the insulating layers involving a dielectric removal step the removal being a chemical etching step, e.g. dry etching
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/40—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the peripheral circuit region
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/30—EEPROM devices comprising charge-trapping gate insulators characterised by the memory core region
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/40—EEPROM devices comprising charge-trapping gate insulators characterised by the peripheral circuit region
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B69/00—Erasable-and-programmable ROM [EPROM] devices not provided for in groups H10B41/00 - H10B63/00, e.g. ultraviolet erasable-and-programmable ROM [UVEPROM] devices
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Semiconductor Memories (AREA)
- Non-Volatile Memory (AREA)
Abstract
【解決手段】半導体基板20を含む結果物の表面上に素子分離用絶縁層22を形成する工程と、絶縁層22を平坦化する工程と、選択ラインが形成される、窒化膜及び絶縁層22の所定箇所を除去し、残留する前記窒化膜を除去する工程と、結果物の表面上にゲート酸化膜23及びフローティングゲート用導電層24を順次形成し、これらが分離されるまで結果物の表面を平坦化する工程と、絶縁層22の一部を除去する工程と、結果物の表面上にONO層25及びキャッピング用導電層26を順次形成する工程と、選択ラインが形成される、導電層26及びONO層25の所定箇所を除去し、結果物の表面上にコントロールゲート用導電層27Aを形成する工程と、導電層27Aの所定箇所を除去し、ゲート構造を形成する工程とを含む。
【選択図】図2K
Description
21 窒化膜
22 素子分離用の絶縁層
23 ゲート酸化膜
24 フローティングゲート用の導電層
25 ONO層
26 キャッピング用の導電層
27 コントロールゲート用の導電層
Claims (4)
- 半導体基板の表面上に窒化膜を蒸着によって形成した後に、素子分離のためのリソグラフィ処理及びエッチングを行い、前記半導体基板を含む結果物の表面上に素子分離用絶縁層を形成する第1ステップと、
前記窒化膜が露出するまで前記素子分離用絶縁層を平坦化する第2ステップと、
選択ラインが形成される、前記窒化膜及び前記素子分離用絶縁層の所定箇所を除去し、残留する前記窒化膜を除去する第3ステップと、
前記窒化膜が除去された結果物の表面上にゲート酸化膜及びフローティングゲート用導電層を順次形成し、前記ゲート酸化膜及び前記フローティングゲート用導電層が分離されるまで結果物の表面を平坦化する第4ステップと、
前記フローティングゲート用導電層の有効面積を増大させるために、前記素子分離用絶縁層の一部を除去する第5ステップと、
前記素子分離用絶縁層の一部が除去された結果物の表面上に、ONO層及びキャッピング用導電層を順次形成する第6ステップと、
選択ラインが形成される、前記キャッピング用導電層及び前記ONO層の所定箇所を除去し、結果物の表面上にコントロールゲート用導電層を形成する第7ステップと、
前記コントロールゲート用導電層の所定箇所を除去し、ゲート構造を形成する第8ステップとを含むことを特徴とするフラッシュメモリ素子のゲート形成方法。 - 前記第2ステップ又は前記第4ステップの平坦化する処理が、化学機械研磨(CMP)により行われることを特徴とする請求項1に記載のフラッシュメモリ素子のゲート形成方法。
- 前記第3ステップの前記素子分離用絶縁層及び前記窒化膜の除去が、ドライエッチング又はウェットエッチングを用いて行われることを特徴とする請求項1に記載のフラッシュメモリ素子のゲート形成方法。
- 前記第7ステップの前記キャッピング用導電層及び前記ONO層の除去が、ドライエッチング又はウェットエッチングを用いて行われることを特徴とする請求項1に記載のフラッシュメモリ素子のゲート形成方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2005-0036272 | 2005-04-29 | ||
KR1020050036272A KR100691490B1 (ko) | 2005-04-29 | 2005-04-29 | 플래시 메모리 소자의 게이트 형성 방법 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006310757A true JP2006310757A (ja) | 2006-11-09 |
JP4916177B2 JP4916177B2 (ja) | 2012-04-11 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2006006106A Expired - Fee Related JP4916177B2 (ja) | 2005-04-29 | 2006-01-13 | フラッシュメモリ素子のゲート形成方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7368346B2 (ja) |
JP (1) | JP4916177B2 (ja) |
KR (1) | KR100691490B1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100756808B1 (ko) * | 2006-04-14 | 2007-09-07 | 주식회사 하이닉스반도체 | 반도체 소자 및 그 제조 방법 |
KR101942504B1 (ko) * | 2012-08-31 | 2019-01-28 | 에스케이하이닉스 주식회사 | 매립 게이트형 반도체 소자, 그 반도체 소자를 갖는 모듈 및 시스템 그리고 그 반도체 소자 제조 방법 |
US9093304B2 (en) * | 2012-10-12 | 2015-07-28 | Finscale Inc. | Vertical super-thin body semiconductor on dielectric wall devices and methods of their fabrication |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0864700A (ja) * | 1994-08-19 | 1996-03-08 | Toshiba Corp | 不揮発性半導体記憶装置及びその製造方法 |
JP2004172567A (ja) * | 2002-11-18 | 2004-06-17 | Hynix Semiconductor Inc | 半導体素子の製造方法 |
JP2004186316A (ja) * | 2002-12-02 | 2004-07-02 | Toshiba Corp | 半導体装置およびその製造方法 |
JP2004228421A (ja) * | 2003-01-24 | 2004-08-12 | Renesas Technology Corp | 不揮発性半導体記憶装置およびその製造方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100238865B1 (ko) * | 1996-09-16 | 2000-01-15 | 윤종용 | 불휘발성 반도체 메모리 장치의 메모리 셀의 제조방법 |
US6200856B1 (en) * | 1998-03-25 | 2001-03-13 | Winbond Electronics Corporation | Method of fabricating self-aligned stacked gate flash memory cell |
KR100295149B1 (ko) * | 1998-03-26 | 2001-07-12 | 윤종용 | 셀프-얼라인소오스공정을이용하는비휘발성메모리장치의제조방법 |
US6204149B1 (en) * | 1999-05-26 | 2001-03-20 | Micron Technology, Inc. | Methods of forming polished material and methods of forming isolation regions |
US6130168A (en) * | 1999-07-08 | 2000-10-10 | Taiwan Semiconductor Manufacturing Company | Using ONO as hard mask to reduce STI oxide loss on low voltage device in flash or EPROM process |
KR100418091B1 (ko) * | 2001-06-29 | 2004-02-11 | 주식회사 하이닉스반도체 | 반도체 소자의 제조 방법 |
US6893917B2 (en) * | 2002-06-24 | 2005-05-17 | Taiwan Semiconductor Manufacturing Company | Structure and fabricating method to make a cell with multi-self-alignment in split gate flash |
US6888755B2 (en) * | 2002-10-28 | 2005-05-03 | Sandisk Corporation | Flash memory cell arrays having dual control gates per memory cell charge storage element |
US6902974B2 (en) * | 2003-05-16 | 2005-06-07 | Promos Technologies Inc. | Fabrication of conductive gates for nonvolatile memories from layers with protruding portions |
US6838342B1 (en) * | 2003-10-03 | 2005-01-04 | Promos Technologies, Inc. | Nonvolatile memory fabrication methods comprising lateral recessing of dielectric sidewalls at substrate isolation regions |
US7094653B2 (en) * | 2004-10-14 | 2006-08-22 | Taiwan Semiconductor Manufacturing Co., Ltd. | Method for forming STI structures with controlled step height |
-
2005
- 2005-04-29 KR KR1020050036272A patent/KR100691490B1/ko not_active IP Right Cessation
- 2005-12-23 US US11/317,684 patent/US7368346B2/en not_active Expired - Fee Related
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2006
- 2006-01-13 JP JP2006006106A patent/JP4916177B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0864700A (ja) * | 1994-08-19 | 1996-03-08 | Toshiba Corp | 不揮発性半導体記憶装置及びその製造方法 |
JP2004172567A (ja) * | 2002-11-18 | 2004-06-17 | Hynix Semiconductor Inc | 半導体素子の製造方法 |
JP2004186316A (ja) * | 2002-12-02 | 2004-07-02 | Toshiba Corp | 半導体装置およびその製造方法 |
JP2004228421A (ja) * | 2003-01-24 | 2004-08-12 | Renesas Technology Corp | 不揮発性半導体記憶装置およびその製造方法 |
Also Published As
Publication number | Publication date |
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US20060246649A1 (en) | 2006-11-02 |
KR20060114235A (ko) | 2006-11-06 |
US7368346B2 (en) | 2008-05-06 |
KR100691490B1 (ko) | 2007-03-09 |
JP4916177B2 (ja) | 2012-04-11 |
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