JP2004104124A - 側壁ゲートとsonosセル構造を有する不揮発性メモリ素子の製造方法 - Google Patents
側壁ゲートとsonosセル構造を有する不揮発性メモリ素子の製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 61
- 238000005530 etching Methods 0.000 claims abstract description 31
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 29
- 239000010703 silicon Substances 0.000 claims abstract description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 125000006850 spacer group Chemical group 0.000 claims abstract description 23
- 230000005641 tunneling Effects 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 40
- 229920005591 polysilicon Polymers 0.000 claims description 40
- 150000004767 nitrides Chemical class 0.000 claims description 32
- 239000000758 substrate Substances 0.000 claims description 23
- 238000004518 low pressure chemical vapour deposition Methods 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 229910021332 silicide Inorganic materials 0.000 claims description 4
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract 1
- 230000000873 masking effect Effects 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 7
- 238000000206 photolithography Methods 0.000 description 5
- 229920002120 photoresistant polymer Polymers 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 239000004065 semiconductor Substances 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
- H10B99/00—Subject matter not provided for in other groups of this subclass
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- 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
- 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
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
-
- 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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/401—Multistep manufacturing processes
- H01L29/4011—Multistep manufacturing processes for data storage electrodes
- H01L29/40117—Multistep manufacturing processes for data storage electrodes the electrodes comprising a charge-trapping insulator
-
- 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66833—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a charge trapping gate insulator, e.g. MNOS transistors
-
- 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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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Non-Volatile Memory (AREA)
- Semiconductor Memories (AREA)
Abstract
【解決手段】 シリコン基板302上にトンネリング層パターン312、電荷トラップ層パターン314、遮蔽層パターン316が順次に積層された垂直構造物310を形成し、垂直構造物310によって露出されたシリコン基板上にゲート絶縁膜330を形成し、ゲート絶縁膜の一部表面上で垂直構造物の上部側面と接触されつつ垂直構造物の上部表面から突出されたゲートスペーサを形成し、垂直構造物、ゲートスペーサ及びゲート絶縁膜の露出表面上にゲート形成用導電膜を積層し、ゲート形成用導電膜を全面エッチングして垂直構造物の一部表面とゲート絶縁膜の一部表面とを露出させてコントロールゲート電極346を形成し、コントロールゲート電極をエッチングマスクにしたエッチング工程によりコントロールゲート電極によって露出された垂直構造物を除去し、コントロールゲート電極によって露出されたシリコン基板に不純物イオンを注入してソース領域及びドレーン領域を形成する。
【選択図】 図9
Description
304 ソース領域
306 ドレーン領域
310 ONO膜
312 第1酸化膜パターン
314 第1窒化膜パターン
316 第2酸化膜パターン
330 第3酸化膜パターン
346 ポリシリコン膜
Claims (14)
- シリコン基板の第1表面上にトンネリング層パターン、電荷トラップ層パターン、及び遮蔽層パターンが順次に積層された垂直構造物を形成する段階と、
前記垂直構造物によって露出されたシリコン基板の第2表面上にゲート絶縁膜を形成する段階と、
前記ゲート絶縁膜の一部表面上で前記垂直構造物の上部側面と接触されつつ前記垂直構造物の上部表面から突出されたゲートスペーサを形成する段階と、
前記垂直構造物、ゲートスペーサ、及びゲート絶縁膜の露出表面上にゲート形成用導電膜を積層する段階と、
前記ゲート形成用導電膜を全面エッチングして前記垂直構造物の一部表面と前記ゲート絶縁膜の一部表面を露出させるコントロールゲート電極を形成する段階と、
前記コントロールゲート電極をエッチングマスクとしたエッチング工程を遂行して前記コントロールゲート電極により露出された垂直構造物を除去する段階と、
前記コントロールゲート電極によって露出されたシリコン基板に不純物イオンを注入してソース領域及びドレーン領域を形成する段階と、を含むことを特徴とする不揮発性メモリ素子の製造方法。 - 前記垂直構造物を形成する段階は、
前記シリコン基板上にトンネリング層、電荷トラップ層及び遮蔽層を順次に積層する段階と、
前記遮蔽層上に前記遮蔽層の一部表面を露出させるマスク膜パターンを形成する段階と、
前記マスク膜パターンをエッチングマスクとしたエッチング工程で遮蔽層、電荷トラップ層、及びトンネリング層を順次に除去して前記シリコン基板の第2表面を露出させる垂直構造物を形成する段階と、を含むことを特徴とする請求項1に記載の不揮発性メモリ素子の製造方法。 - 前記トンネリング層、電荷トラップ層、及び遮蔽層は、それぞれ第1酸化膜、窒化膜及び第2酸化膜を使用して形成することを特徴とする請求項2に記載の不揮発性メモリ素子の製造方法。
- 前記第1酸化膜は熱酸化法を使用して形成することを特徴とする請求項3に記載の不揮発性メモリ素子の製造方法。
- 前記窒化膜は、低圧化学気相蒸着(LPCVD)法または前記第1酸化膜に対する窒化工程を遂行して形成することを特徴とする請求項3に記載の不揮発性メモリ素子の製造方法。
- 前記第2酸化膜は、LPCVD法を遂行して形成することを特徴とする請求項3に記載の不揮発性メモリ素子の製造方法。
- 前記マスク膜パターンは窒化膜パターンであることを特徴とする請求項2に記載の不揮発性メモリ素子の製造方法。
- 前記電荷トラップ層はポリシリコンドットを含む膜で形成することを特徴とする請求項2に記載の不揮発性メモリ素子の製造方法。
- 前記電荷トラップ層は、窒化物ドットを含む膜で形成することを特徴とする請求項2に記載の不揮発性メモリ素子の製造方法。
- 前記ゲートスペーサを形成する段階は、
前記ゲート絶縁膜、垂直構造物の一部露出側面及び前記マスク膜パターン上にゲートスペーサ形成用導電膜を形成する段階と、
前記ゲートスペーサ形成用導電膜を全面エッチングして前記垂直構造物の一部側面と前記マスク膜パターンの側面上に付着されたゲートスペーサを形成する段階と、
前記マスク膜パターンを除去して前記ゲートスペーサを前記垂直構造物の上部表面上に突出させる段階と、を含むことを特徴とする請求項2に記載の不揮発性メモリセルの製造方法。 - 前記ゲートスペーサ形成用導電膜は、ポリシリコン膜を使用して形成することを特徴とする請求項10に記載の不揮発性メモリ素子の製造方法。
- 前記ゲート形成用導電膜は、ポリシリコン膜を使用して形成することを特徴とする請求項1に記載の不揮発性メモリ素子の製造方法。
- 前記ゲート形成用導電膜を全面エッチングする段階はエッチングバッグを使用して遂行することを特徴とする請求項1に記載の不揮発性メモリ素子の製造方法。
- 前記ゲート形成用導電膜上部に金属シリサイド膜を形成する段階をさらに含むことを特徴とする請求項1に記載の不揮発性メモリ素子の製造方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR10-2002-0055002A KR100442883B1 (ko) | 2002-09-11 | 2002-09-11 | 측벽 게이트와 sonos 셀 구조를 갖는 불휘발성메모리 소자의 제조 방법 |
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JP2004104124A true JP2004104124A (ja) | 2004-04-02 |
JP4425588B2 JP4425588B2 (ja) | 2010-03-03 |
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JP2003308052A Expired - Fee Related JP4425588B2 (ja) | 2002-09-11 | 2003-08-29 | 側壁ゲートとsonosセル構造を有する不揮発性メモリ素子の製造方法 |
Country Status (4)
Country | Link |
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US (1) | US6960527B2 (ja) |
JP (1) | JP4425588B2 (ja) |
KR (1) | KR100442883B1 (ja) |
TW (1) | TWI239073B (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006222367A (ja) * | 2005-02-14 | 2006-08-24 | Oki Electric Ind Co Ltd | 不揮発性半導体メモリ装置、駆動方法、及び製造方法 |
JPWO2006095890A1 (ja) * | 2005-03-07 | 2008-08-21 | 日本電気株式会社 | 半導体装置およびその製造方法 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100585107B1 (ko) * | 2003-11-13 | 2006-05-30 | 삼성전자주식회사 | 자기 정렬을 이용한 로컬 소노스 소자 제조 방법 |
TWI233666B (en) * | 2004-04-13 | 2005-06-01 | Powerchip Semiconductor Corp | Method of manufacturing non-volatile memory cell |
US7586137B2 (en) | 2004-08-09 | 2009-09-08 | Samsung Electronics Co., Ltd. | Non-volatile memory device and method of fabricating the same |
KR100594326B1 (ko) * | 2005-03-22 | 2006-06-30 | 삼성전자주식회사 | 2-비트 동작을 위한 비휘발성 메모리 소자 및 그 제조 방법 |
US7579243B2 (en) | 2006-09-26 | 2009-08-25 | Freescale Semiconductor, Inc. | Split gate memory cell method |
US7416945B1 (en) * | 2007-02-19 | 2008-08-26 | Freescale Semiconductor, Inc. | Method for forming a split gate memory device |
KR100997321B1 (ko) * | 2008-06-03 | 2010-11-29 | 주식회사 동부하이텍 | 반도체 소자 및 그 제조 방법 |
US7902022B2 (en) * | 2008-07-29 | 2011-03-08 | Freescale Semiconductor, Inc. | Self-aligned in-laid split gate memory and method of making |
KR101002114B1 (ko) | 2008-11-06 | 2010-12-16 | 주식회사 동부하이텍 | 플래시 메모리 소자 및 그 제조 방법 |
US8471328B2 (en) | 2010-07-26 | 2013-06-25 | United Microelectronics Corp. | Non-volatile memory and manufacturing method thereof |
US9614053B2 (en) * | 2013-12-05 | 2017-04-04 | Taiwan Semiconductor Manufacturing Company, Ltd. | Spacers with rectangular profile and methods of forming the same |
CN104392997B (zh) * | 2014-11-12 | 2017-05-31 | 清华大学 | 阶梯型垂直栅nand及其形成方法 |
JP6956592B2 (ja) * | 2017-10-31 | 2021-11-02 | 東京エレクトロン株式会社 | シリコン酸化膜を形成する方法および装置 |
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KR0150048B1 (ko) * | 1994-12-23 | 1998-10-01 | 김주용 | 플래쉬 이이피롬 셀 및 그 제조방법 |
US5559735A (en) * | 1995-03-28 | 1996-09-24 | Oki Electric Industry Co., Ltd. | Flash memory having select transistors |
JP3878681B2 (ja) * | 1995-06-15 | 2007-02-07 | 株式会社ルネサステクノロジ | 不揮発性半導体記憶装置 |
US5780893A (en) * | 1995-12-28 | 1998-07-14 | Nippon Steel Corporation | Non-volatile semiconductor memory device including memory transistor with a composite gate structure |
KR100237014B1 (ko) * | 1997-06-27 | 2000-01-15 | 김영환 | 플래쉬 이이피롬 셀 제조 방법 |
JP3378879B2 (ja) * | 1997-12-10 | 2003-02-17 | 松下電器産業株式会社 | 不揮発性半導体記憶装置及びその駆動方法 |
JP2978477B1 (ja) * | 1998-06-12 | 1999-11-15 | 株式会社日立製作所 | 半導体集積回路装置およびその製造方法 |
KR20000044872A (ko) * | 1998-12-30 | 2000-07-15 | 김영환 | 플래쉬 메모리 셀의 제조 방법 |
US6747310B2 (en) * | 2002-10-07 | 2004-06-08 | Actrans System Inc. | Flash memory cells with separated self-aligned select and erase gates, and process of fabrication |
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- 2002-09-11 KR KR10-2002-0055002A patent/KR100442883B1/ko not_active IP Right Cessation
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2003
- 2003-08-29 JP JP2003308052A patent/JP4425588B2/ja not_active Expired - Fee Related
- 2003-09-01 TW TW092124071A patent/TWI239073B/zh not_active IP Right Cessation
- 2003-09-05 US US10/655,308 patent/US6960527B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006222367A (ja) * | 2005-02-14 | 2006-08-24 | Oki Electric Ind Co Ltd | 不揮発性半導体メモリ装置、駆動方法、及び製造方法 |
JPWO2006095890A1 (ja) * | 2005-03-07 | 2008-08-21 | 日本電気株式会社 | 半導体装置およびその製造方法 |
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TW200404350A (en) | 2004-03-16 |
US20040048481A1 (en) | 2004-03-11 |
US6960527B2 (en) | 2005-11-01 |
KR100442883B1 (ko) | 2004-08-02 |
TWI239073B (en) | 2005-09-01 |
KR20040023294A (ko) | 2004-03-18 |
JP4425588B2 (ja) | 2010-03-03 |
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