JP6026839B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6026839B2 JP6026839B2 JP2012222094A JP2012222094A JP6026839B2 JP 6026839 B2 JP6026839 B2 JP 6026839B2 JP 2012222094 A JP2012222094 A JP 2012222094A JP 2012222094 A JP2012222094 A JP 2012222094A JP 6026839 B2 JP6026839 B2 JP 6026839B2
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- layer
- electrode layer
- transistor
- oxide semiconductor
- insulating layer
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- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- 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
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- H01L21/46—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/428
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- 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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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
- H01L29/41725—Source or drain electrodes for field effect devices
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- 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
- H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
- H01L29/78618—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure
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- 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
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- H10B—ELECTRONIC MEMORY DEVICES
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- Ceramic Engineering (AREA)
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- Semiconductor Memories (AREA)
- Thin Film Transistor (AREA)
- Non-Volatile Memory (AREA)
- Electrodes Of Semiconductors (AREA)
Description
本実施の形態では、半導体装置及び半導体装置の作製方法の一態様について図1乃至図3を用いて説明する。
図1(A)及び図1(B)に半導体装置の例としてトランジスタ420の平面図及び断面図を示す。図1(A)は、トランジスタ420の平面図であり、図1(B)は、図1(A)のX1−Y1における断面図である。なお、図1(A)では、煩雑になることを避けるため、トランジスタ420の構成要素の一部(例えば、絶縁層407)を省略して図示している。
以下、図2及び図3を用いて、本実施の形態のトランジスタの作製工程の例について説明する。
本実施の形態では、本明細書に示すトランジスタを使用し、電力が供給されない状況でも記憶内容の保持が可能で、かつ、書き込み回数にも制限が無い半導体装置の一例を、図面を用いて説明する。
本実施の形態においては、実施の形態1に示すトランジスタを使用し、電力が供給されない状況でも記憶内容の保持が可能で、かつ、書き込み回数にも制限が無い半導体装置について、実施の形態2に示した構成と異なる構成について、図5及び図6を用いて説明を行う。
本実施の形態では、先の実施の形態で示した半導体装置を携帯電話、スマートフォン、電子書籍などの携帯機器に応用した場合の例を図7乃至図10を用いて説明する。
106 素子分離絶縁層
108 ゲート絶縁層
110 ゲート電極層
116 チャネル形成領域
120 不純物領域
124 金属間化合物領域
128 絶縁層
130 絶縁層
132 絶縁層
135 絶縁層
136 電極層
137a 側壁層
137b 側壁層
142a 電極層
142b 電極層
144 酸化物半導体層
146 ゲート絶縁層
148 ゲート電極層
150 絶縁層
153 導電層
156 配線
160 トランジスタ
162 トランジスタ
164 容量素子
250 メモリセル
251 メモリセルアレイ
251a メモリセルアレイ
251b メモリセルアレイ
253 周辺回路
254 容量素子
256 絶縁層
260 配線
262 導電層
400 基板
401 ゲート電極層
402 ゲート絶縁層
403 酸化物半導体層
403a 不純物領域
403b 不純物領域
403c チャネル形成領域
405a ソース電極層
405b ドレイン電極層
406 絶縁層
407 絶縁層
412a 側壁層
412b 側壁層
413 酸化物半導体層
413a 酸化物半導体層
420 トランジスタ
422 トランジスタ
431 ドーパント
435a 配線層
435b 配線層
436 下地絶縁層
801 トランジスタ
803 トランジスタ
804 トランジスタ
805 トランジスタ
806 トランジスタ
807 Xデコーダー
808 Yデコーダー
811 トランジスタ
812 保持容量
813 Xデコーダー
814 Yデコーダー
901 RF回路
902 アナログベースバンド回路
903 デジタルベースバンド回路
904 バッテリー
905 電源回路
906 アプリケーションプロセッサ
907 CPU
908 DSP
909 インターフェイス
910 フラッシュメモリ
911 ディスプレイコントローラ
912 メモリ回路
913 ディスプレイ
914 表示部
915 ソースドライバ
916 ゲートドライバ
917 音声回路
918 キーボード
919 タッチセンサ
950 メモリ回路
951 メモリコントローラ
952 メモリ
953 メモリ
954 スイッチ
955 スイッチ
956 ディスプレイコントローラ
957 ディスプレイ
1001 バッテリー
1002 電源回路
1003 マイクロプロセッサ
1004 フラッシュメモリ
1005 音声回路
1006 キーボード
1007 メモリ回路
1008 タッチパネル
1009 ディスプレイ
1010 ディスプレイコントローラ
Claims (3)
- ソース電極層及びドレイン電極層と、
第1の不純物領域、第2の不純物領域、及び前記第1の不純物領域と前記第2の不純物領域に挟まれたチャネル形成領域を含み、且つ、前記第1の不純物領域のチャネル長方向の側面において前記ソース電極層と接し、前記第2の不純物領域のチャネル長方向の側面において前記ドレイン電極層と接する酸化物半導体層と、
前記酸化物半導体層、前記ソース電極層、及び前記ドレイン電極層の上面と接するゲート絶縁層と、
前記ゲート絶縁層を介して前記チャネル形成領域上に設けられたゲート電極層と、
前記ゲート電極層のチャネル長方向の側面の一方と接する第1の側壁層と、
前記ゲート電極層のチャネル長方向の側面の他方と接する第2の側壁層と、を有し、
前記酸化物半導体層の上面のチャネル長方向の長さは、前記酸化物半導体層の下面のチャネル長方向の長さよりも長く、
前記第1の側壁層の少なくとも一部は、前記ゲート絶縁層を介して前記ソース電極層上に設けられ、
前記第2の側壁層の少なくとも一部は、前記ゲート絶縁層を介して前記ドレイン電極層上に設けられ、
前記第1の側壁層及び前記第2の側壁層は、導電性を有する半導体装置。 - 請求項1において、
前記第1の側壁層、前記第2の側壁層及び前記ゲート電極層上に設けられた絶縁層と、
前記絶縁層及び前記ゲート絶縁層に設けられた第1の開口を介して、前記ソース電極層と電気的に接続する第1の配線層と、
前記絶縁層及び前記ゲート絶縁層に設けられた第2の開口を介して、前記ドレイン電極層と電気的に接続する第2の配線層と、を有する半導体装置。 - 請求項2において、
前記絶縁層は、酸化アルミニウム層を含む半導体装置。
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