JP5604291B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5604291B2 JP5604291B2 JP2010287416A JP2010287416A JP5604291B2 JP 5604291 B2 JP5604291 B2 JP 5604291B2 JP 2010287416 A JP2010287416 A JP 2010287416A JP 2010287416 A JP2010287416 A JP 2010287416A JP 5604291 B2 JP5604291 B2 JP 5604291B2
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- transistor
- source
- insulating layer
- electrode
- potential
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- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- 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
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
-
- 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
- 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
- G11C16/0425—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells containing floating gate transistors comprising cells containing a merged floating gate and select transistor
-
- 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
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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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、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別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8乃至図10を参照して説明する。
図8は、半導体装置の構成の一例である。図8(A)には、半導体装置の断面を、図8(B)には、半導体装置の平面を、それぞれ示す。ここで、図8(A)は、図8(B)のA1−A2およびB1−B2における断面に相当する。図8(A)および図8(B)に示される半導体装置は、下部に酸化物半導体以外の材料を用いたトランジスタ160を有し、上部に酸化物半導体を用いたトランジスタ162を有するものである。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9を参照して説明し、その後、上部のトランジスタ162の作製方法について図10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9(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、図10を用いて、層間絶縁層128上にトランジスタ162を作製する工程について説明する。なお、図10は、層間絶縁層128上の各種電極や、トランジスタ162などの作製工程を示すものであるから、トランジスタ162の下部に存在するトランジスタ160等については省略している。
本実施の形態では、実施の形態4とは異なる、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11及び図12を参照して説明する。
図11は、半導体装置の構成の一例である。図11(A)には、半導体装置の断面を、図11(B)には、半導体装置の平面を、それぞれ示す。ここで、図11(A)は、図11(B)のA1−A2およびB1−B2における断面に相当する。図11(A)および図11(B)に示される半導体装置は、下部に酸化物半導体以外の材料を用いたトランジスタ160を有し、上部に酸化物半導体を用いたトランジスタ162を有するものである。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、下部のトランジスタ160を形成した後の工程、上部のトランジスタ162の作製方法について図12を参照して説明する。下部のトランジスタ160については、実施の形態4で示した方法と同様の方法で作製することができ、実施の形態4の記載を参酌することができる。
次に、図11とは異なる、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25および図26を参照して説明する。
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、下部のトランジスタ160を形成した後の、上部のトランジスタ163の作製方法について図26を参照して説明する。下部のトランジスタについては、実施の形態4に示した方法と同様の方法で作製することができ、実施の形態4の記載を参酌することができる。
本実施の形態では、実施の形態4、実施の形態5とは異なる、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13乃至図15を参照して説明する。
図13は、半導体装置の構成の一例である。図13(A)には、半導体装置の断面を、図13(B)には、半導体装置の平面を、それぞれ示す。ここで、図13(A)は、図13(B)のC1−C2およびD1−D2における断面に相当する。図13(B)の平面図においては、煩雑になることを避けるため、ソース電極またはドレイン電極154や、配線156など、構成要素の一部を省略している。図13(A)および図13(B)に示される半導体装置は、下部に酸化物半導体以外の半導体材料を用いたトランジスタ160を有し、上部に酸化物半導体を用いたトランジスタ162を有するものである。酸化物半導体以外の半導体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、下部のトランジスタ160を形成した後の工程、上部のトランジスタ162の作製方法について図14および図15を参照して説明する。下部のトランジスタ160については、実施の形態4で示した方法と同様の方法で作製することができる。詳細については、実施の形態4の記載を参酌できる。なお、本実施の形態では、トランジスタ160を覆うように層間絶縁層125、層間絶縁層126、層間絶縁層128、の三種類の層間絶縁層が形成されるものとする(図9(G)参考)。また、本実施の形態では、トランジスタ160の作製工程において、ソース電極またはドレイン電極130a、ソース電極またはドレイン電極130bを形成しないが(図9(H)参考)、ソース電極またはドレイン電極130aおよびソース電極またはドレイン電極130bが形成されていない状態であっても、便宜上、トランジスタ160と呼ぶことにする。
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18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
112 絶縁層
114 不純物領域
116 チャネル形成領域
118 サイドウォール絶縁層
120 高濃度不純物領域
122 金属層
124 金属化合物領域
124a 金属化合物領域
124b 金属化合物領域
125 層間絶縁層
126 層間絶縁層
128 層間絶縁層
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
130c 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
142c 配線
142d 配線
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 層間絶縁層
152 層間絶縁層
154 ソース電極またはドレイン電極
156 配線
156a 配線
156b 配線
158a ソース電極またはドレイン電極
158b 電極
160 トランジスタ
162 トランジスタ
163 トランジスタ
164 容量素子
165 容量素子
166 半導体層
168 メモリセル
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 駆動回路
1112 駆動回路
1113 駆動回路
1114 駆動回路
1200 メモリセル
1211 駆動回路
1212 駆動回路
1213 駆動回路
1214 駆動回路
Claims (5)
- 駆動回路と、
スイッチと、
第1のトランジスタと、
第2のトランジスタと、
容量と、を有し、
前記第1のトランジスタは、酸化物半導体層を有し、
前記第2のトランジスタは、シリコン半導体層を有し、
前記第2のトランジスタのゲート電極の上面は、前記第1のトランジスタのソース電極又はドレイン電極の一方と接する領域を有し、
前記容量の電極は、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、
前記容量の電極は、前記第1のトランジスタのソース電極又はドレイン電極の一方と電気的に接続され、
前記第1のトランジスタのソース電極又はドレイン電極の他方は、前記スイッチを介して、前記駆動回路と電気的に接続されている
ことを特徴とする半導体装置。 - 駆動回路と、
スイッチと、
第1のトランジスタと、
第2のトランジスタと、
容量と、
絶縁膜と、を有し、
前記第1のトランジスタは、酸化物半導体層を有し、
前記第2のトランジスタは、シリコン半導体層を有し、
前記絶縁膜は、前記酸化物半導体層と、前記シリコン半導体層との間にあり、
前記第2のトランジスタは、前記絶縁膜の一部を除去することで、上面が露出されたゲート電極を有し、
前記第2のトランジスタのゲート電極の上面は、前記第1のトランジスタのソース電極又はドレイン電極の一方と接する領域を有し、
前記容量の電極は、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、
前記容量の電極は、前記第1のトランジスタのソース電極又はドレイン電極の一方と電気的に接続され、
前記第1のトランジスタのソース電極又はドレイン電極の他方は、前記スイッチを介して、前記駆動回路と電気的に接続されている
ことを特徴とする半導体装置。 - 駆動回路と、
スイッチと、
シリコン半導体層と、
酸化物半導体層と、
絶縁膜と、
第1の導電膜と、
第2の導電膜と、
第3の導電膜と、を有し、
前記第1の導電膜は、前記シリコン半導体層を有する第2のトランジスタのゲート電極として機能する領域を有し、
前記第2の導電膜は、前記酸化物半導体層を有する第1のトランジスタのソース電極又はドレイン電極の一方として機能する領域を有し、
前記絶縁膜は、前記第1のトランジスタのゲート絶縁膜として機能する領域を有し、
前記第2の導電膜と、前記絶縁膜と、前記第3の導電膜とが重なる領域に容量を有し、
前記第2の導電膜は、前記容量の一方の電極として機能する領域を有し、
前記第3の導電膜は、前記容量の他方の電極として機能する領域を有し、
前記第1の導電膜の上面は、前記第2の導電膜と接する領域を有し、
前記第1のトランジスタのソース電極又はドレイン電極の他方は、前記スイッチを介して、前記駆動回路と電気的に接続されている
ことを特徴とする半導体装置。 - 請求項1乃至請求項3のいずれか一において、
前記第2のトランジスタは、n型を有することを特徴とする半導体装置。 - 請求項1乃至請求項3のいずれか一において、
前記第2のトランジスタは、p型を有することを特徴とする半導体装置。
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US20130256771A1 (en) | 2013-10-03 |
WO2011080998A1 (en) | 2011-07-07 |
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US20110156028A1 (en) | 2011-06-30 |
KR101762316B1 (ko) | 2017-07-27 |
KR20170087536A (ko) | 2017-07-28 |
KR101842413B1 (ko) | 2018-03-26 |
TW201537570A (zh) | 2015-10-01 |
TW201140583A (en) | 2011-11-16 |
JP5840267B2 (ja) | 2016-01-06 |
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JP2015029111A (ja) | 2015-02-12 |
KR20120114281A (ko) | 2012-10-16 |
US20160027784A1 (en) | 2016-01-28 |
TWI501227B (zh) | 2015-09-21 |
TWI575520B (zh) | 2017-03-21 |
JP2012039059A (ja) | 2012-02-23 |
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