JP6607681B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6607681B2 JP6607681B2 JP2015041903A JP2015041903A JP6607681B2 JP 6607681 B2 JP6607681 B2 JP 6607681B2 JP 2015041903 A JP2015041903 A JP 2015041903A JP 2015041903 A JP2015041903 A JP 2015041903A JP 6607681 B2 JP6607681 B2 JP 6607681B2
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- transistor
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- insulating film
- semiconductor layer
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- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 1
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- 229910000484 niobium oxide Inorganic materials 0.000 description 1
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- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
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- 229910052712 strontium Inorganic materials 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
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- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/24—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using capacitors
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/403—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells with charge regeneration common to a multiplicity of memory cells, i.e. external refresh
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
- G11C11/407—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing for memory cells of the field-effect type
- G11C11/408—Address circuits
- G11C11/4085—Word line control circuits, e.g. word line drivers, - boosters, - pull-up, - pull-down, - precharge
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/16—Storage of analogue signals in digital stores using an arrangement comprising analogue/digital [A/D] converters, digital memories and digital/analogue [D/A] converters
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C8/00—Arrangements for selecting an address in a digital store
- G11C8/14—Word line organisation; Word line lay-out
-
- 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
- H10B41/20—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels
-
- 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
- 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]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/674—Thin-film transistors [TFT] characterised by the active materials
- H10D30/6755—Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D88/00—Three-dimensional [3D] integrated devices
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Semiconductor Memories (AREA)
- Thin Film Transistor (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Non-Volatile Memory (AREA)
- Dram (AREA)
- Electroluminescent Light Sources (AREA)
Description
本実施の形態では、開示する発明の一態様に係る半導体装置700が有する、メモリセルアレイ300の回路構成及びその動作について説明する。
次に、図1で説明したメモリセルアレイ300を有する積層構造の一例を図6を用いて説明する。
図26(A)に示す回路図は、pチャネル型のトランジスタ2200とnチャネル型のトランジスタ2100を直列に接続し、且つそれぞれのゲートを接続した、いわゆるCMOS回路の構成を示している。なお図中、第2の半導体材料が適用されたトランジスタには「OS」の記号を付して示している。
また図26(B)に示す回路図は、トランジスタ2100とトランジスタ2200のそれぞれのソースとドレインを接続した構成を示している。このような構成とすることで、いわゆるアナログスイッチとして機能させることができる。
次に、メモリセルアレイ300及び周辺回路500を有する半導体装置の積層構造の例について、図6を参照して説明する。周辺回路500上に、メモリセルアレイ300が設けられている。メモリセルアレイ300はメモリセルCLを有する。メモリセルCLは、c個のサブメモリセルSCL_j(jは1からcまでの自然数)を有する。図6には、サブメモリセルSCL_1及びサブメモリセルSCL_2の積層構造の例を示しており、図示しないが、サブメモリセルSCL_2の上には更にサブメモリセルSCL_3が積層され、順にサブメモリセルSCL_cまで積層される。なお、メモリセルアレイ300の回路図は、図1(B)を参照する。
また、図8に示す積層構造は、図6とは異なる半導体装置の積層構造の一例である。図8に示す半導体装置は、メモリセルアレイ300と、周辺回路500を有する。なお、図8はj=4までの積層を示すが、実際にはj=5以上のサブメモリセルが積層されてもよく、積層数が多いほどメモリの集積度を高めることができるため、より好ましい。図8に示すメモリセルアレイ300の回路図は、例えば図4を参照する。ここで、図8においては、図をみやすくするため、膜の界面等を一部省略している。
また、図11に示す積層構造は、図6及び図8とは異なる半導体装置の積層構造の一例である。図11(A)は、メモリセルアレイ300の有するサブメモリセルの上面図を示す。また、図11(B)は、図11(A)に示すA−A’の断面、A’−Bの断面、及びB−B’の断面を示す。また、図11(C)は、図11(A)に示すC−C’の断面を示す。図11(B)に示す半導体装置は、メモリセルアレイ300と、周辺回路500を有する。なお、図11はj=2までの積層を示すが、実際にはj=3以上のサブメモリセルが積層されることが好ましく、積層数が多いほどメモリの集積度を高めることができるため、より好ましい。図8に示すメモリセルアレイ300の回路図は、例えば図1(B)を参照する。
また、図12に示す積層構造は、図6、図8及び図11とは異なる半導体装置の積層構造の一例である。また、図12に示す積層構造は、図6とは異なる半導体装置の積層構造の一例である。図12に示す半導体装置は、メモリセルアレイ300と、周辺回路500を有する。なお、図12はj=4までの積層を示すが、実際にはj=5以上のサブメモリセルが積層されてもよく、積層数が多いほどメモリの集積度を高めることができるため、より好ましい。図12に示すメモリセルアレイ300の回路図は、例えば図4を参照する。
以下では、上記構成例で示した半導体装置の作製方法の一例について、図13乃至図16を用いて説明する。
本実施の形態では、実施の形態1に示すトランジスタTa_j及びトランジスタTb_jに好適に用いることのできる酸化物半導体について説明する。なお、トランジスタTb_jについては、トランジスタTa_jの記載を参照する。また、半導体層201j_a、半導体層201j_b及び半導体層201j_cについてはそれぞれ半導体層101j_a、半導体層101j_b及び半導体層101j_cの記載を参照することができる。但し、半導体層101j_aと半導体層201j_aは、必ずしも同じ材料を用いなくともよい。すなわち、例えば半導体層101j_aと半導体層201j_aにIn−M−Zn酸化物を用いる場合、例えばインジウム、元素M及び亜鉛の原子数比が同じ材料を用いなくてもよい。また、例えば半導体層101j_aと半導体層201j_aは、エネルギーギャップが同じ材料を用いなくてもよい。また、半導体層101j_bと半導体層201j_b、または半導体層101j_cと半導体層201j_cについても同様である。
以下では、酸化物半導体の構造について説明する。
まずは、CAAC−OSについて説明する。
次に、nc−OSについて説明する。
a−like OSは、nc−OSと非晶質酸化物半導体との間の構造を有する酸化物半導体である。
本実施の形態では、上記実施の形態で例示したメモリセルアレイ300等の記憶装置を含むRFタグについて、図27を用いて説明する。ここで記憶装置はメモリセルアレイに接続する行選択ドライバ、列選択ドライバ、及びA/Dコンバータ等を含む構成を含んでもよい。
本実施の形態では、少なくとも実施の形態で説明したメモリセルアレイ300等を含む記憶装置を含むCPUについて説明する。ここで記憶装置はメモリセルアレイに接続する行選択ドライバ、列選択ドライバ、及びA/Dコンバータ等を含む構成を含んでもよい。
本発明の一態様に係る半導体装置は、表示機器、パーソナルコンピュータ、記録媒体を備えた画像再生装置(代表的にはDVD:Digital Versatile Disc等の記録媒体を再生し、その画像を表示しうるディスプレイを有する装置)に用いることができる。その他に、本発明の一態様に係る半導体装置を用いることができる電子機器として、携帯電話、携帯型を含むゲーム機、携帯データ端末、電子書籍端末、ビデオカメラ、デジタルスチルカメラ等のカメラ、ゴーグル型ディスプレイ(ヘッドマウントディスプレイ)、ナビゲーションシステム、音響再生装置(カーオーディオ、デジタルオーディオプレイヤー等)、複写機、ファクシミリ、プリンタ、プリンタ複合機、現金自動預け入れ払い機(ATM)、自動販売機などが挙げられる。これら電子機器の具体例を図30に示す。
本実施の形態では、本発明の一態様に係るRFタグの使用例について図31を用いながら説明する。RFタグの用途は広範にわたるが、例えば、紙幣、硬貨、有価証券類、無記名債券類、証書類(運転免許証や住民票等、図31(A)参照)、包装用容器類(包装紙やボトル等、図31(C)参照)、記録媒体(DVDやビデオテープ等、図31(B)参照)、乗り物類(自転車等、図31(D)参照)、身の回り品(鞄や眼鏡等)、食品類、植物類、動物類、人体、衣類、生活用品類、薬品や薬剤を含む医療品、または電子機器(液晶表示装置、EL表示装置、テレビジョン装置、または携帯電話)等の物品、若しくは各物品に取り付ける荷札(図31(E)、図31(F)参照)等に設けて使用することができる。
101j_a 半導体層
101j_b 半導体層
101j_c 半導体層
102j ゲート絶縁膜
103j ゲート電極
104 導電膜
104j_a 導電層
104j_b 導電層
105j 導電層
111 バリア膜
112j 絶縁膜
113j 絶縁膜
114j 絶縁膜
115j 絶縁膜
116j 絶縁膜
130a トランジスタ
130b トランジスタ
131 半導体基板
132 半導体層
133a 低抵抗層
133b 低抵抗層
134 ゲート絶縁膜
135 ゲート電極
136 絶縁膜
137 絶縁膜
138 絶縁膜
141j プラグ
142j プラグ
143j プラグ
144j プラグ
145j プラグ
146j プラグ
147j プラグ
148j プラグ
151j 導電層
152j 導電層
153 導電膜
153j 導電層
154j 導電層
156j 絶縁膜
171j_a 低抵抗領域
171j_b 低抵抗領域
176a 領域
176b 領域
190 トランジスタ
198 トランジスタ
199 トランジスタ
201j 半導体層
201j_a 半導体層
201j_b 半導体層
201j_c 半導体層
202j ゲート絶縁膜
203j ゲート電極
204j 導電膜
204j_a 導電層
204j_b 導電層
205j 導電層
212j 絶縁膜
213j 絶縁膜
214j 絶縁膜
216j 絶縁膜
230a トランジスタ
230b トランジスタ
232 半導体層
233a 低抵抗層
233b 低抵抗層
235 ゲート電極
300 メモリセルアレイ
500 周辺回路
700 半導体装置
800 RFタグ
801 通信器
802 アンテナ
803 無線信号
804 アンテナ
805 整流回路
806 定電圧回路
807 復調回路
808 変調回路
809 論理回路
810 記憶回路
811 ROM
901 筐体
902 筐体
903 表示部
904 表示部
905 マイクロフォン
906 スピーカー
907 操作キー
908 スタイラス
911 筐体
912 筐体
913 表示部
914 表示部
915 接続部
916 操作キー
921 筐体
922 表示部
923 キーボード
924 ポインティングデバイス
931 筐体
932 冷蔵室用扉
933 冷凍室用扉
941 筐体
942 筐体
943 表示部
944 操作キー
945 レンズ
946 接続部
951 車体
952 車輪
953 ダッシュボード
954 ライト
1189 ROMインターフェース
1190 基板
1191 ALU
1192 ALUコントローラ
1193 インストラクションデコーダ
1194 インタラプトコントローラ
1195 タイミングコントローラ
1196 レジスタ
1197 レジスタコントローラ
1198 バスインターフェース
1199 ROM
1200 記憶素子
1201 回路
1202 回路
1203 スイッチ
1204 スイッチ
1206 論理素子
1207 容量素子
1208 容量素子
1209 トランジスタ
1210 トランジスタ
1213 トランジスタ
1214 トランジスタ
1220 回路
2100 トランジスタ
2200 トランジスタ
4000 RFタグ
5100 ペレット
5120 基板
5161 領域
Claims (1)
- メモリセルを有し、
前記メモリセルは、第1乃至第c(cは2以上の自然数)のサブメモリセルを有し、
第j(jは1からcまでの自然数)のサブメモリセルは、第1のトランジスタ、第2のトランジスタ及び容量素子を有し、
前記第1のトランジスタの第1の半導体層及び前記第2のトランジスタの第2の半導体層は、酸化物半導体を有し、
前記容量素子の端子の一方は、前記第2のトランジスタのゲート電極と電気的に接続され、
前記第2のトランジスタのゲート電極は、前記第1のトランジスタのソース電極またはドレイン電極の一方と電気的に接続され、
j≧2において、前記第jのサブメモリセルの第2のトランジスタの半導体層と、第(j−1)のサブメモリセルの第1のトランジスタの半導体層は、第1の絶縁膜の上面に接し、
j≧2において、前記第jのサブメモリセルの第2のトランジスタのゲート電極と、前記第(j−1)のサブメモリセルの第1のトランジスタのゲート電極は、第2の絶縁膜の下面に接し、
ビット線は、前記第(j−1)のサブメモリセルと電気的に接続され、且つ前記第jのサブメモリセルと電気的に接続されている半導体装置。
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US10217752B2 (en) | 2019-02-26 |
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