JP2006179746A - 半導体記憶装置 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 35
- 229910021332 silicide Inorganic materials 0.000 claims abstract description 34
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000758 substrate Substances 0.000 claims abstract description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 58
- 239000010703 silicon Substances 0.000 claims description 58
- 229910052710 silicon Inorganic materials 0.000 claims description 58
- 238000009825 accumulation Methods 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 62
- 108091006146 Channels Proteins 0.000 description 28
- 238000009792 diffusion process Methods 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 14
- 230000002093 peripheral effect Effects 0.000 description 14
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 125000006850 spacer group Chemical group 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000969 carrier Substances 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 5
- 238000005468 ion implantation Methods 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 108010075750 P-Type Calcium Channels Proteins 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 239000013078 crystal Substances 0.000 description 1
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- 238000005530 etching Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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- 229910021420 polycrystalline silicon Inorganic materials 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
- H10B12/00—Dynamic random access memory [DRAM] devices
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- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/84—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being other than a semiconductor body, e.g. being an insulating body
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- 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
- H01L27/10—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 repetitive configuration
- H01L27/105—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 repetitive configuration including field-effect components
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- 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
- H01L27/1203—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 the substrate comprising an insulating body on a semiconductor body, e.g. SOI
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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
- H01L29/7841—Field effect transistors with field effect produced by an insulated gate with floating body, e.g. programmable transistors
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- H—ELECTRICITY
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- H10B—ELECTRONIC MEMORY DEVICES
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/50—Peripheral circuit region structures
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Abstract
【解決手段】 半導体記憶装置は、絶縁性基板とこの上に形成された半導体層とを有する半導体素子基体と、前記半導体素子基体に形成されて電気的にフローティングのチャネルボディのキャリア蓄積状態によりデータ記憶を行うメモリセルが配列され、各ソース及びドレイン領域が一方向に隣接する2メモリセルにより共有されるセルアレイと、前記メモリセルのソース及びドレイン領域の表面に形成されたシリサイド膜とを有し、前記メモリセルは、ソース及びドレイン領域の少なくとも一方の少なくとも一部の幅がチャネル領域の幅より小さい状態に形成されている。
【選択図】 図10
Description
絶縁性基板とこの上に形成された半導体層とを有する半導体素子基体と、
前記半導体素子基体に形成されて電気的にフローティングのチャネルボディのキャリア蓄積状態によりデータ記憶を行うメモリセルが配列され、各ソース及びドレイン領域が一方向に隣接する2メモリセルにより共有されるセルアレイと、
前記メモリセルのソース及びドレイン領域の表面に形成されたシリサイド膜とを有し、
前記メモリセルは、ソース及びドレイン領域の少なくとも一方の少なくとも一部の幅がチャネル領域の幅より小さい状態に形成されている。
図1,図2及び図3は、一実施の形態によるFBCメモリに用いられる半導体素子基体10のセルアレイ領域の平面図とそのI−I’及びII−II’断面図である。素子基体10は、絶縁性基板とこの上に形成されたp型シリコン層13とを有する、いわゆるSOI(Silicon-On-Insulator)基板である。絶縁性基板はこの例ではシリコン酸化膜等の絶縁膜12で覆われたシリコン基板11である。例えば、シリコン層13の膜厚は、50〜60nm(例えば55nm)であり、シリコン酸化膜12は25nmである。
上記実施の形態1では、メモリセルのソース/ドレイン領域の幅をチャネル領域幅に比べて小さくしたが、ソース/ドレイン領域のなかの配線コンタクト部のみ幅を小さくすることも有効である。
ここまでの実施の形態1,2では、ソース及びドレイン領域を共に幅を狭くしている。このことは、次のような理由で好ましい。即ち、ビット線BLが接続されるドレイン領域の横方向抵抗を大きくすることは、図20で説明したようなビット線電圧を下げた“0”書き込み時のバイポーラ・ディスターブ(即ち、ドレイン領域を共有する隣接セル間の干渉)を抑制する上で有効である。
図16は、ソース及びドレイン領域のうち、ドレイン側の配線コンタクト領域(ビット線コンタクト領域)のみが、幅W2の第2のシリコン領域13bに重ねられ、それ以外は幅W1の第1のシリコン領域13aに形成される例のレイアウトを示している。断面図は示さないが、この場合もp型シリコン層厚や、幅を狭くしたドレイン領域に形成されるシリサイド膜厚が実施の形態1,2と同程度になるものとして、ドレイン側の寄生バイポーラトランジスタに起因するデータ破壊が防止される。
ここまでの実施の形態1−4においては、p型シリコン層13の厚みを50〜60nmとし、幅を狭くしたソース/ドレイン領域のシリサイド膜直下に残るシリコン層厚みが約20nm程度となるようにした。このソース/ドレイン領域のシリコン層厚みは、バイポーラ・ディスターブの抑制という観点からは薄いほどよい。
Claims (5)
- 絶縁性基板とこの上に形成された半導体層とを有する半導体素子基体と、
前記半導体素子基体に形成されて電気的にフローティングのチャネルボディのキャリア蓄積状態によりデータ記憶を行うメモリセルが配列され、各ソース及びドレイン領域が一方向に隣接する2メモリセルにより共有されるセルアレイと、
前記メモリセルのソース及びドレイン領域の表面に形成されたシリサイド膜とを有し、
前記メモリセルは、ソース及びドレイン領域の少なくとも一方の少なくとも一部の幅がチャネル領域の幅より小さい状態に形成されている
ことを特徴とする半導体記憶装置。 - 前記メモリセルのソース及びドレイン領域の幅がチャネル領域の幅より小さい
ことを特徴とする請求項1記載の半導体記憶装置。 - 前記メモリセルのソース及びドレイン領域のうち、配線コンタクト領域の幅がチャネル領域の幅より小さい
ことを特徴とする請求項1記載の半導体記憶装置。 - 絶縁性基板とこの上に形成された半導体層とを有し、それぞれ第1の半導体領域とそれより幅が小さい第2の半導体領域とが交互に所定ピッチで配列された状態となるように複数の素子形成領域が形成された半導体素子基体と、
前記半導体素子基体に、電気的にフローティングのチャネルボディのキャリア蓄積状態によりデータ記憶を行うメモリセルが前記各素子形成領域内で隣接するセル間がソース及びドレイン領域を共有するように形成され、各メモリセルのゲート電極が前記第1の半導体領域を横切って形成されかつ、ソース及びドレイン領域の少なくとも一方の少なくとも一部が前記第2の半導体領域に形成されたセルアレイと、
前記メモリセルのゲート電極及び、ソース及びドレイン領域に表面に形成されたシリサイド膜とを有する
ことを特徴とする半導体記憶装置。 - 前記メモリセルのソース及びドレイン領域に、前記シリサイド膜が形成される前に、選択エピタキシャル成長によりシリコン層が形成されている
ことを特徴とする請求項1乃至4のいずれかに記載の半導体記憶装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004372720A JP4040622B2 (ja) | 2004-12-24 | 2004-12-24 | 半導体記憶装置 |
US11/115,106 US20060138558A1 (en) | 2004-12-24 | 2005-04-27 | Semiconductor memory device and method of fabricating the same |
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JP2004372720A JP4040622B2 (ja) | 2004-12-24 | 2004-12-24 | 半導体記憶装置 |
Publications (2)
Publication Number | Publication Date |
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JP2006179746A true JP2006179746A (ja) | 2006-07-06 |
JP4040622B2 JP4040622B2 (ja) | 2008-01-30 |
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JP2004372720A Expired - Fee Related JP4040622B2 (ja) | 2004-12-24 | 2004-12-24 | 半導体記憶装置 |
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US (1) | US20060138558A1 (ja) |
JP (1) | JP4040622B2 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008166724A (ja) * | 2006-12-05 | 2008-07-17 | Semiconductor Energy Lab Co Ltd | 半導体装置 |
JP2009152407A (ja) * | 2007-12-20 | 2009-07-09 | Toshiba Corp | 半導体記憶装置 |
JP2009177080A (ja) * | 2008-01-28 | 2009-08-06 | Toshiba Corp | 半導体記憶装置 |
US7924644B2 (en) | 2008-01-03 | 2011-04-12 | Samsung Electronics Co., Ltd. | Semiconductor memory device including floating body transistor memory cell array and method of operating the same |
US7944759B2 (en) | 2007-10-10 | 2011-05-17 | Samsung Electronics Co., Ltd. | Semiconductor memory device including floating body transistor |
US7969808B2 (en) | 2007-07-20 | 2011-06-28 | Samsung Electronics Co., Ltd. | Memory cell structures, memory arrays, memory devices, memory controllers, and memory systems, and methods of manufacturing and operating the same |
US8039325B2 (en) | 2008-12-18 | 2011-10-18 | Samsung Electronics Co., Ltd. | Methods of fabricating semiconductor device having capacitorless one-transistor memory cell |
US8054693B2 (en) | 2008-12-17 | 2011-11-08 | Samsung Electronics Co., Ltd. | Capacitorless dynamic memory device capable of performing data read/restoration and method for operating the same |
US8134202B2 (en) | 2008-05-06 | 2012-03-13 | Samsung Electronics Co., Ltd. | Capacitorless one-transistor semiconductor memory device having improved data retention abilities and operation characteristics |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5118341B2 (ja) * | 2006-12-22 | 2013-01-16 | 株式会社東芝 | 半導体記憶装置及びその製造方法 |
KR101406604B1 (ko) * | 2007-01-26 | 2014-06-11 | 마이크론 테크놀로지, 인코포레이티드 | 게이트형 바디 영역으로부터 격리되는 소스/드레인 영역을 포함하는 플로팅-바디 dram 트랜지스터 |
CN101771051B (zh) * | 2009-12-25 | 2011-09-14 | 中国科学院上海微系统与信息技术研究所 | 一种浮体动态随机存储器的单元结构及其制作工艺 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0389555A (ja) * | 1989-09-01 | 1991-04-15 | Hitachi Ltd | 半導体装置及びその製法 |
US5293052A (en) * | 1992-03-23 | 1994-03-08 | Harris Corporation | SOT CMOS device having differentially doped body extension for providing improved backside leakage channel stop |
JPH0669515A (ja) * | 1992-08-19 | 1994-03-11 | Fujitsu Ltd | 半導体記憶装置 |
US6429120B1 (en) * | 2000-01-18 | 2002-08-06 | Micron Technology, Inc. | Methods and apparatus for making integrated-circuit wiring from copper, silver, gold, and other metals |
US6621725B2 (en) * | 2000-08-17 | 2003-09-16 | Kabushiki Kaisha Toshiba | Semiconductor memory device with floating storage bulk region and method of manufacturing the same |
US20040099891A1 (en) * | 2001-10-25 | 2004-05-27 | Manoj Mehrotra | Sub-critical-dimension integrated circuit features |
US6689658B2 (en) * | 2002-01-28 | 2004-02-10 | Silicon Based Technology Corp. | Methods of fabricating a stack-gate flash memory array |
-
2004
- 2004-12-24 JP JP2004372720A patent/JP4040622B2/ja not_active Expired - Fee Related
-
2005
- 2005-04-27 US US11/115,106 patent/US20060138558A1/en not_active Abandoned
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008166724A (ja) * | 2006-12-05 | 2008-07-17 | Semiconductor Energy Lab Co Ltd | 半導体装置 |
US8853782B2 (en) | 2006-12-05 | 2014-10-07 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
US7969808B2 (en) | 2007-07-20 | 2011-06-28 | Samsung Electronics Co., Ltd. | Memory cell structures, memory arrays, memory devices, memory controllers, and memory systems, and methods of manufacturing and operating the same |
US7944759B2 (en) | 2007-10-10 | 2011-05-17 | Samsung Electronics Co., Ltd. | Semiconductor memory device including floating body transistor |
JP2009152407A (ja) * | 2007-12-20 | 2009-07-09 | Toshiba Corp | 半導体記憶装置 |
US7924644B2 (en) | 2008-01-03 | 2011-04-12 | Samsung Electronics Co., Ltd. | Semiconductor memory device including floating body transistor memory cell array and method of operating the same |
JP2009177080A (ja) * | 2008-01-28 | 2009-08-06 | Toshiba Corp | 半導体記憶装置 |
US8134202B2 (en) | 2008-05-06 | 2012-03-13 | Samsung Electronics Co., Ltd. | Capacitorless one-transistor semiconductor memory device having improved data retention abilities and operation characteristics |
US8054693B2 (en) | 2008-12-17 | 2011-11-08 | Samsung Electronics Co., Ltd. | Capacitorless dynamic memory device capable of performing data read/restoration and method for operating the same |
US8039325B2 (en) | 2008-12-18 | 2011-10-18 | Samsung Electronics Co., Ltd. | Methods of fabricating semiconductor device having capacitorless one-transistor memory cell |
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JP4040622B2 (ja) | 2008-01-30 |
US20060138558A1 (en) | 2006-06-29 |
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