JP5695934B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5695934B2 JP5695934B2 JP2011038201A JP2011038201A JP5695934B2 JP 5695934 B2 JP5695934 B2 JP 5695934B2 JP 2011038201 A JP2011038201 A JP 2011038201A JP 2011038201 A JP2011038201 A JP 2011038201A JP 5695934 B2 JP5695934 B2 JP 5695934B2
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- insulating layer
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Classifications
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/60—Electrodes
-
- 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
-
- 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
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
- H10B12/31—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells having a storage electrode stacked over the transistor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Semiconductor Memories (AREA)
- Thin Film Transistor (AREA)
- Dram (AREA)
- Non-Volatile Memory (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (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の回路構成およびその動作について、図1を参照して説明する。なお、回路図においては、酸化物半導体を用いたトランジスタであることを示すために、OSの符号を併せて付す場合がある。
本実施の形態では、先の実施の形態において説明した半導体装置の応用例の一について説明する。具体的には、先の実施の形態において説明した半導体装置をマトリクス状に配列した半導体装置の一例について説明する。
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の構成およびその作製方法について、図5乃至図9を参照して説明する。
図5は、半導体装置の構成の一例である。図5(A)には、半導体装置の断面を、図5(B)には、半導体装置の平面を、それぞれ示す。ここで、図5(A)は、図5(B)のA1−A2およびB1−B2における断面に相当する。図5(A)および図5(B)に示される半導体装置は、下部に第1の半導体材料を用いたトランジスタ160を有し、上部に第2の半導体材料を用いたトランジスタ162を有するものである。ここで、第1の半導体材料と第2の半導体材料とは異なる材料とすることが望ましい。例えば、第1の半導体材料を酸化物半導体以外の半導体材料(シリコンなど)とし、第2の半導体材料を酸化物半導体とすることができる。酸化物半導体以外の材料を用いたトランジスタは、高速動作が容易である。一方で、酸化物半導体を用いたトランジスタは、その特性により長時間の電荷保持を可能とする。
次に、上記半導体装置の作製方法の一例について説明する。以下では、はじめに下部のトランジスタ160の作製方法について図6および図7を参照して説明し、その後、上部のトランジスタ162および容量素子164の作製方法について図8および図9を参照して説明する。
まず、半導体材料を含む基板100を用意する(図6(A)参照)。半導体材料を含む基板100としては、シリコンや炭化シリコンなどの単結晶半導体基板、多結晶半導体基板、シリコンゲルマニウムなどの化合物半導体基板、SOI基板などを適用することができる。ここでは、半導体材料を含む基板100として、単結晶シリコン基板を用いる場合の一例について示すものとする。なお、一般に「SOI基板」は、絶縁表面上にシリコン層が設けられた構成の基板をいうが、本明細書等においては、絶縁表面上にシリコン以外の材料からなる半導体層が設けられた構成の基板も含む概念として用いる。つまり、「SOI基板」が有する半導体層は、シリコン層に限定されない。また、SOI基板には、ガラス基板などの絶縁基板上に絶縁層を介して半導体層が設けられた構成のものが含まれるものとする。
次に、ゲート電極110、絶縁層128、絶縁層130などの上に導電層を形成し、該導電層を選択的にエッチングして、ソース電極またはドレイン電極142a、ソース電極またはドレイン電極142bを形成する(図8(A)参照)。
本実施の形態では、上述の実施の形態で説明した半導体装置を電子機器に適用する場合について、図10を用いて説明する。本実施の形態では、コンピュータ、携帯電話機(携帯電話、携帯電話装置ともいう)、携帯情報端末(携帯型ゲーム機、音響再生装置なども含む)、デジタルカメラ、デジタルビデオカメラ、電子ペーパー、テレビジョン装置(テレビ、またはテレビジョン受信機ともいう)などの電子機器に、上述の半導体装置を適用する場合について説明する。
102 保護層
104 半導体領域
106 素子分離絶縁層
108 ゲート絶縁層
110 ゲート電極
116 チャネル形成領域
120 不純物領域
122 金属層
124 金属化合物領域
128 絶縁層
130 絶縁層
130a ソース電極またはドレイン電極
130b ソース電極またはドレイン電極
142a ソース電極またはドレイン電極
142b ソース電極またはドレイン電極
143a 絶縁層
143b 絶縁層
144 酸化物半導体層
146 ゲート絶縁層
148a ゲート電極
148b 電極
150 絶縁層
152 絶縁層
154 電極
156 配線
160 トランジスタ
162 トランジスタ
164 容量素子
701 筐体
702 筐体
703 表示部
704 キーボード
711 本体
712 スタイラス
713 表示部
714 操作ボタン
715 外部インターフェイス
720 電子書籍
721 筐体
723 筐体
725 表示部
727 表示部
731 電源
733 操作キー
735 スピーカー
737 軸部
740 筐体
741 筐体
742 表示パネル
743 スピーカー
744 マイクロフォン
745 操作キー
746 ポインティングデバイス
747 カメラ用レンズ
748 外部接続端子
749 太陽電池セル
750 外部メモリスロット
761 本体
763 接眼部
764 操作スイッチ
765 表示部
766 バッテリー
767 表示部
770 テレビジョン装置
771 筐体
773 表示部
775 スタンド
780 リモコン操作機
800 測定系
802 容量素子
804 トランジスタ
805 トランジスタ
806 トランジスタ
808 トランジスタ
1100 メモリセル
1111 第1の駆動回路
1112 第2の駆動回路
1113 第3の駆動回路
1114 第4の駆動回路
Claims (1)
- ソース線と、ビット線と、第1の信号線と、第2の信号線と、ワード線と、前記ソース線と前記ビット線との間に接続されたメモリセルと、を有し、
前記メモリセルは、
第1のゲート電極、第1のソース電極、第1のドレイン電極、及び第1の半導体を含む第1のトランジスタと、
第2のゲート電極、第2のソース電極、第2のドレイン電極、及び第2の半導体を含む第2のトランジスタと、
容量素子と、
を有し、
前記第1の半導体は、第1のチャネル形成領域を有し
前記第2の半導体は、第2のチャネル形成領域を有し、
前記第2のチャネル形成領域は、酸化物半導体を有し、
前記第1のチャネル形成領域は、前記第2のチャネル形成領域とは異なる半導体材料を有すると共に、前記第1のトランジスタのしきい値電圧が正となるように導電性を付与する不純物元素が添加され、
前記第1のゲート電極と、前記第2のドレイン電極と、前記容量素子の電極の一方と、は電気的に接続されて電荷が保持されるノードを構成し、
前記ソース線と、前記第1のソース電極とは、電気的に接続され、
前記ビット線と、前記第1のドレイン電極とは、電気的に接続され、
前記第1の信号線と、前記第2のソース電極とは、電気的に接続され、
前記第2の信号線と、前記第2のゲート電極とは、電気的に接続され、
前記ワード線と、前記容量素子の電極の他方とは、電気的に接続され、
前記ノードには、前記第1のトランジスタのコンダクタンスを制御するための三種類以上の電荷の一が与えられ、
前記第2のトランジスタは、
第1の絶縁層、第2の絶縁層及び第3の絶縁層を含み、
前記第1の絶縁層は、前記第2のソース電極上方に設けられた領域を有し、
前記第2の絶縁層は、前記第2のドレイン電極上方に設けられた領域を有し、
前記第2の半導体は、前記第1の絶縁層上方及び前記第2の絶縁層上方に設けられた領域を有し、
前記第3の絶縁層は、前記第2の半導体上方に設けられた領域を有し、
前記第2のゲート電極は、前記第3の絶縁層上方に設けられた領域を有し、
前記第1の絶縁層は、前記第2のソース電極と前記第2のゲート電極との間に設けられた領域を有し、
前記第2の絶縁層は、前記第2のドレイン電極と前記第2のゲート電極との間に設けられた領域を有する半導体装置。
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US9613964B2 (en) | 2017-04-04 |
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US20110210339A1 (en) | 2011-09-01 |
TW201145498A (en) | 2011-12-16 |
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JP2011199274A (ja) | 2011-10-06 |
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