JP5639921B2 - 半導体メモリ装置 - Google Patents
半導体メモリ装置 Download PDFInfo
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- JP5639921B2 JP5639921B2 JP2011033241A JP2011033241A JP5639921B2 JP 5639921 B2 JP5639921 B2 JP 5639921B2 JP 2011033241 A JP2011033241 A JP 2011033241A JP 2011033241 A JP2011033241 A JP 2011033241A JP 5639921 B2 JP5639921 B2 JP 5639921B2
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- 239000004065 semiconductor Substances 0.000 title claims description 101
- 230000015654 memory Effects 0.000 claims description 80
- 239000003990 capacitor Substances 0.000 claims description 42
- 239000000758 substrate Substances 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052738 indium Inorganic materials 0.000 claims description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 210000004027 cell Anatomy 0.000 description 71
- 239000010408 film Substances 0.000 description 44
- 238000000034 method Methods 0.000 description 30
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- 239000011229 interlayer Substances 0.000 description 19
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- 230000010354 integration Effects 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 12
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 10
- 229910021332 silicide Inorganic materials 0.000 description 10
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical group [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- 229910052772 Samarium Inorganic materials 0.000 description 8
- 238000002955 isolation Methods 0.000 description 8
- 239000002356 single layer Substances 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
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- 239000001257 hydrogen Substances 0.000 description 4
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- 239000012535 impurity Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
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- 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
-
- 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
-
- 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
- G11C16/0408—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells containing floating gate transistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/06—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration
- H01L27/0611—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration integrated circuits having a two-dimensional layout of components without a common active region
- H01L27/0617—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration integrated circuits having a two-dimensional layout of components without a common active region comprising components of the field-effect type
- H01L27/0629—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration integrated circuits having a two-dimensional layout of components without a common active region comprising components of the field-effect type in combination with diodes, or resistors, or capacitors
-
- 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
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78645—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with multiple gate
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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
- H10B41/10—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the top-view layout
-
- 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
- H10B41/70—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates the floating gate being an electrode shared by two or more components
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1222—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer
- H01L27/1225—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Ceramic Engineering (AREA)
- Semiconductor Memories (AREA)
- Dram (AREA)
- Non-Volatile Memory (AREA)
- Electrodes Of Semiconductors (AREA)
- Thin Film Transistor (AREA)
Description
本実施の形態では、図1(A)および(B)に示す半導体メモリ回路の動作について説明する。ここでは、書き込みトランジスタTr1および読み出しトランジスタTr2は、ともにn型であるものとする。まず、書き込み方法について、図2を用いて説明する。書き込み時においては、読み出しビット線(・・、Om−1、Om、Om+1、・・)、バイアス線(・・、Sm−1、Sm、Sm+1、・・)、読み出しワード線(・・、Pn−1、Pn、Pn+1、・・)は一定の電位に保たれる。配線の種類ごとにそれぞれの電位は異なってもよいが、ここですべての電位を0ボルトとする。
本実施の形態では、図5(A)および(B)に示す半導体メモリ回路の動作について説明する。ここでは、書き込みトランジスタTr1および読み出しトランジスタTr2は、ともにn型であるものとする。本実施の形態は、実施の形態1の読み出しビット線を書き込みビット線で代用したものである。先に説明した通り、このような構造とすることにより、半導体メモリ装置の配線を実施の形態1の場合よりも削減できる。
本実施の形態では、実施の形態2で説明した半導体メモリ装置の形状や作製方法について説明する。本実施の形態では、書き込みトランジスタTr1は、亜鉛とインジウムを含有する酸化物半導体を用い、読み出しトランジスタTr2としては、単結晶シリコン半導体を用いる。そのため、書き込みトランジスタTr1は読み出しトランジスタTr2の上に積層して設けられる。
本実施の形態では、実施の形態3とは異なる作製方法について説明する。図10に本実施の形態の半導体メモリ装置の記憶セルのレイアウト例を示す。基本構造は、図7と同じである。図10(A)は単結晶シリコン基板上に設けられた主要な配線・電極等を示す。基板上に素子分離領域202が形成される。また、素子分離領域202以外の部分には、導電性の材料やドーピングされたシリコンによる領域を形成し、その一部は、読み出しトランジスタTr2のソース206a、ドレイン206bとなる。
実施の形態2で示した半導体メモリ装置は、実施の形態1で示した半導体メモリ装置の読み出しビット線を書き込みビット線で代用したものである。しかしながら、この構成では、以下の理由により、書き込み時に消費電力が多くなるという問題がある。以下では、読み出しトランジスタがNチャネル型であるとして説明する。
102 素子分離領域
103 ゲート絶縁膜
104 ゲート電極
105a シリサイド領域
105b シリサイド領域
106a ソース
106b ドレイン
107 層間絶縁物
108 溝状の開口部
109 導電性材料の膜
109a 導電性材料の膜
109b 書き込みビット線
110 酸化物半導体領域
111 ゲート絶縁膜
112a 書き込みワード線
112b 読み出しワード線
113 層間絶縁物
114 書き込みトランジスタ
115 キャパシタ
116 読み出しトランジスタ
201 単結晶シリコン基板
202 素子分離領域
203 ゲート絶縁膜
204 ダミーゲート
205a シリサイド領域
205b シリサイド領域
206a ソース
206b ドレイン
207 層間絶縁物
208a 溝状の開口部
208b 溝状の開口部
208c 開口部
209 導電性材料の膜
209a ゲート電極
209b 書き込みビット線
209c バイアス線
210 酸化物半導体領域
211 ゲート絶縁膜
212a 書き込みワード線
212b 読み出しワード線
Claims (1)
- 基板上に設けられた第1の配線、第2の配線、第3の配線、及び第4の配線と、複数の記憶セルと、を有するマトリクス状の半導体メモリ装置において、
前記第1の配線は、第1の方向に沿うように設けられた領域を有し、
前記第2の配線は、前記第1の方向に沿うように設けられた領域を有し、
前記第3の配線は、第2の方向に沿うように設けられた領域を有し、
前記第4の配線は、前記第2の方向に沿うように設けられた領域を有し、
前記第1の方向と前記第2の方向とは交差し、
前記複数の記憶セルの少なくとも1つは、第1のトランジスタと、第2のトランジスタと、キャパシタと、を有し、
前記第1のトランジスタのソースまたはドレインの一方は、前記第2のトランジスタのゲート及び前記キャパシタの一方の電極と電気的に接続され、
前記第1のトランジスタのゲートは、前記第1の配線と電気的に接続され、
前記第1のトランジスタのソースまたはドレインの他方及び前記第2のトランジスタのソースまたはドレインの一方は、前記第3の配線と電気的に接続され、
前記第2のトランジスタのソースまたはドレインの他方は、前記第4の配線と電気的に接続され、
前記キャパシタの他方の電極は、前記第2の配線と電気的に接続され、
前記第1のトランジスタのチャネルは、亜鉛とインジウムとを有する酸化物半導体に設けられ、
前記酸化物半導体の下方に、絶縁層と、前記第2のトランジスタのゲート電極と、前記第3の配線と、を有し、
前記絶縁層の上方に、前記第1の配線を有し、
前記絶縁層の上面と、前記第3の配線の上面と、前記第2のトランジスタのゲート電極の上面とは、平坦化されており、
前記第3の配線は、前記第1の配線と前記基板との間に設けられていることを特徴とする半導体メモリ装置。
Priority Applications (1)
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JP2011033241A JP5639921B2 (ja) | 2010-02-19 | 2011-02-18 | 半導体メモリ装置 |
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JP2010034903 | 2010-02-19 | ||
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JP2011033241A JP5639921B2 (ja) | 2010-02-19 | 2011-02-18 | 半導体メモリ装置 |
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JP2014215958A Division JP5860119B2 (ja) | 2010-02-19 | 2014-10-23 | 半導体装置 |
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JP2011192982A JP2011192982A (ja) | 2011-09-29 |
JP2011192982A5 JP2011192982A5 (ja) | 2014-03-20 |
JP5639921B2 true JP5639921B2 (ja) | 2014-12-10 |
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JP2011033241A Expired - Fee Related JP5639921B2 (ja) | 2010-02-19 | 2011-02-18 | 半導体メモリ装置 |
JP2014215958A Expired - Fee Related JP5860119B2 (ja) | 2010-02-19 | 2014-10-23 | 半導体装置 |
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JP2014215958A Expired - Fee Related JP5860119B2 (ja) | 2010-02-19 | 2014-10-23 | 半導体装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8593857B2 (ja) |
JP (2) | JP5639921B2 (ja) |
KR (2) | KR102015762B1 (ja) |
TW (2) | TWI557742B (ja) |
WO (1) | WO2011102206A1 (ja) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101932909B1 (ko) * | 2010-03-04 | 2018-12-27 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 메모리 장치 및 반도체 장치 |
US8416622B2 (en) | 2010-05-20 | 2013-04-09 | Semiconductor Energy Laboratory Co., Ltd. | Driving method of a semiconductor device with an inverted period having a negative potential applied to a gate of an oxide semiconductor transistor |
US8422272B2 (en) | 2010-08-06 | 2013-04-16 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and driving method thereof |
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KR20180043383A (ko) * | 2010-01-22 | 2018-04-27 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치 제작 방법 |
WO2011114868A1 (en) * | 2010-03-19 | 2011-09-22 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
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2011
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KR20180093103A (ko) | 2018-08-20 |
TW201642265A (zh) | 2016-12-01 |
KR101889285B1 (ko) | 2018-08-20 |
TWI606446B (zh) | 2017-11-21 |
KR102015762B1 (ko) | 2019-08-29 |
US8593857B2 (en) | 2013-11-26 |
KR20120135412A (ko) | 2012-12-13 |
JP2015065440A (ja) | 2015-04-09 |
TW201201212A (en) | 2012-01-01 |
JP2011192982A (ja) | 2011-09-29 |
US20110205774A1 (en) | 2011-08-25 |
JP5860119B2 (ja) | 2016-02-16 |
TWI557742B (zh) | 2016-11-11 |
WO2011102206A1 (en) | 2011-08-25 |
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