JP2013236068A - 半導体装置及び半導体装置の作製方法 - Google Patents
半導体装置及び半導体装置の作製方法 Download PDFInfo
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- NJWNEWQMQCGRDO-UHFFFAOYSA-N indium zinc Chemical compound [Zn].[In] NJWNEWQMQCGRDO-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229960001730 nitrous oxide Drugs 0.000 description 1
- 235000013842 nitrous oxide Nutrition 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229910052696 pnictogen Inorganic materials 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000004439 roughness measurement Methods 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 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
- 238000005406 washing 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66742—Thin film unipolar transistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4908—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET for thin film semiconductor, e.g. gate of TFT
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02565—Oxide semiconducting materials not being Group 12/16 materials, e.g. ternary compounds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30604—Chemical etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30625—With simultaneous mechanical treatment, e.g. mechanico-chemical polishing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/78606—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
- H01L29/78609—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 for preventing leakage current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
Abstract
【解決手段】酸化物絶縁膜上に、チャネル形成領域を含む酸化物半導体膜と、ソース電極層及びドレイン電極層と、ゲート絶縁膜と、ゲート電極層とが順に積層されたトランジスタを有する半導体装置において、ゲート電極層とチャネル形成領域を介して重なり、トランジスタの電気的特性を制御する導電層を、酸素過剰領域を含む酸化物絶縁膜中に設ける。
【選択図】図1
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形態を、図1を用いて説明する。本実施の形態では、半導体装置の一例として酸化物半導体膜を有するトランジスタを示す。
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た半導体装置の例を図6、図7、及び図15を用いて説明する。
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(記憶装置)の一例を、図面を用いて説明する。
本実施の形態では、半導体装置の一例として、上記実施の形態1に開示したトランジスタを少なくとも一部に用いたCPU(Central Processing Unit)について説明する。
本明細書に開示する半導体装置は、さまざまな電子機器(遊技機も含む)に適用することができる。電子機器としては、テレビ、モニタ等の表示装置、照明装置、デスクトップ型或いはノート型のパーソナルコンピュータ、ワードプロセッサ、DVD(Digital Versatile Disc)などの記録媒体に記憶された静止画又は動画を再生する画像再生装置、ポータブルCDプレーヤ、ラジオ、テープレコーダ、ヘッドホンステレオ、ステレオ、コードレス電話子機、トランシーバ、携帯無線機、携帯電話、自動車電話、携帯型ゲーム機、電卓、携帯情報端末、電子手帳、電子書籍、電子翻訳機、音声入力機器、ビデオカメラ、デジタルスチルカメラ、電気シェーバ、電子レンジ等の高周波加熱装置、電気炊飯器、電気洗濯機、電気掃除機、エアコンディショナーなどの空調設備、食器洗い器、食器乾燥器、衣類乾燥器、布団乾燥器、電気冷蔵庫、電気冷凍庫、電気冷凍冷蔵庫、DNA保存用冷凍庫、煙感知器、放射線測定器、透析装置等の医療機器、などが挙げられる。さらに、誘導灯、信号機、ベルトコンベア、エレベータ、エスカレータ、産業用ロボット、電力貯蔵システム等の産業機器も挙げられる。また、石油を用いたエンジンや、非水系二次電池からの電力を用いて電動機により推進する移動体なども、電子機器の範疇に含まれるものとする。上記移動体として、例えば、電気自動車(EV)、内燃機関と電動機を併せ持ったハイブリッド車(HEV)、プラグインハイブリッド車(PHEV)、これらのタイヤ車輪を無限軌道に変えた装軌車両、電動アシスト自転車を含む原動機付自転車、自動二輪車、電動車椅子、ゴルフ用カート、小型又は大型船舶、潜水艦、ヘリコプター、航空機、ロケット、人工衛星、宇宙探査機や惑星探査機、宇宙船が挙げられる。これらの電子機器の具体例を図12に示す。
108 ゲート絶縁膜
110 ゲート電極層
116 チャネル形成領域
120 不純物領域
128 絶縁層
130 絶縁層
142a 電極層
142b 電極層
144 酸化物半導体膜
146 ゲート絶縁膜
148a ゲート電極層
148b 導電層
150 絶縁膜
152 絶縁膜
156 配線
160 トランジスタ
162 トランジスタ
164 容量素子
180 酸素過剰領域
181a 導電層
181b 導電層
182 酸化物絶縁膜
183 絶縁膜
185 基板
400 基板
401 ゲート電極層
401a ゲート電極層
401b ゲート電極層
401c ゲート電極層
402 ゲート絶縁膜
403 酸化物半導体膜
403a 酸化物半導体膜
403b 酸化物半導体膜
404a 低抵抗領域
404b 低抵抗領域
405a ソース電極層
405b ドレイン電極層
407 絶縁膜
409 チャネル形成領域
420 トランジスタ
430 トランジスタ
431 酸素
436 酸化物絶縁膜
440a トランジスタ
440b トランジスタ
440c トランジスタ
480 酸化物絶縁膜
481 酸素過剰領域
482 絶縁膜
483 絶縁膜
484 酸化物絶縁膜
491 導電層
491a 導電層
491b 導電層
600 基板
601 ゲート電極層
602 ゲート絶縁膜
603 酸化物半導体膜
605a 電極層
605b 電極層
607 絶縁膜
610 トランジスタ
615 絶縁膜
636 酸化物絶縁膜
640 トランジスタ
641 ゲート電極層
642 ゲート絶縁膜
643 チャネル形成領域
644 n型不純物領域
645 n型不純物領域
646 側壁絶縁層
647 配線層
648 配線層
650 トランジスタ
651 ゲート電極層
652 ゲート絶縁膜
653 チャネル形成領域
654 p型不純物領域
655 p型不純物領域
656 側壁絶縁層
657 配線層
658 配線層
660 CMOS回路
681 酸素過剰領域
683 絶縁膜
684 絶縁膜
686 絶縁膜
687 絶縁膜
688 絶縁膜
689 絶縁膜
690 容量素子
691 導電層
692 配線層
693 導電層
700 基板
740 トランジスタ
741 ゲート電極層
742 ゲート絶縁膜
743 チャネル形成領域
744 n型不純物領域
745 n型不純物領域
746 側壁絶縁層
748 配線層
750 トランジスタ
751 ゲート電極層
752 ゲート絶縁膜
753 チャネル形成領域
754 p型不純物領域
755 p型不純物領域
756 側壁絶縁層
760 回路
788 絶縁膜
789 素子分離領域
800 基板
801 トランジスタ
802 トランジスタ
803 トランジスタ
804 トランジスタ
811 トランジスタ
812 トランジスタ
813 トランジスタ
814 トランジスタ
821 ゲート電極層
825 電極層
826 絶縁膜
830 絶縁膜
831 配線層
832 配線層
833 絶縁膜
834 配線層
835 配線層
836 絶縁膜
838 酸素過剰領域
839 酸化物絶縁膜
840 導電層
841 ゲート電極層
842 導電層
843 絶縁膜
845 電極層
1141 スイッチング素子
1142 メモリセル
1143 メモリセル群
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
3004 論理回路
3021 本体
3022 固定部
3023 表示部
3024 操作ボタン
3025 外部メモリスロット
3170a メモリセル
3170b メモリセル
3400 メモリセルアレイ
8000 テレビジョン装置
8001 筐体
8002 表示部
8003 スピーカ部
8200 室内機
8201 筐体
8202 送風口
8203 CPU
8204 室外機
8300 電気冷凍冷蔵庫
8301 筐体
8302 冷蔵室用扉
8303 冷凍室用扉
8304 CPU
9000 テーブル
9001 筐体
9002 脚部
9003 表示部
9004 表示ボタン
9005 電源コード
9033 留め具
9034 スイッチ
9035 電源スイッチ
9036 スイッチ
9038 操作スイッチ
9201 本体
9202 筐体
9203 表示部
9204 キーボード
9205 外部接続ポート
9206 ポインティングデバイス
9630 筐体
9631 表示部
9631a 表示部
9631b 表示部
9632a 領域
9632b 領域
9633 太陽電池
9634 充放電制御回路
9635 バッテリー
9636 DCDCコンバータ
9637 コンバータ
9638 操作キー
9639 ボタン
9700 電気自動車
9701 二次電池
9702 制御回路
9703 駆動装置
9704 処理装置
Claims (10)
- 導電層と、前記導電層上に前記導電層の凸部を平坦化するように設けられた酸素過剰領域を含む酸化物絶縁膜と
前記酸化物絶縁膜上に設けられたチャネル形成領域を含む酸化物半導体膜と、
前記酸化物半導体膜上に、前記酸化物半導体膜と電気的に接続するソース電極層及びドレイン電極層と、
前記酸化物半導体膜、前記ソース電極層、及び前記ドレイン電極層上にゲート絶縁膜と、
前記ゲート絶縁膜上に前記チャネル形成領域と重なるゲート電極層と、
前記酸化物半導体膜、前記ソース電極層、前記ドレイン電極層、及び前記ゲート電極層上に酸化アルミニウム膜を含む絶縁膜を有し、
前記酸化物絶縁膜は、前記導電層上において他の領域より膜厚が小さく、
前記酸化物絶縁膜において、前記酸素過剰領域と前記チャネル形成領域と距離は、前記酸素過剰領域と前記ソース電極層及び前記ドレイン電極層との距離より短いことを特徴とする半導体装置。 - 請求項1において、前記ゲート絶縁膜は酸化物絶縁膜であることを特徴とする半導体装置。
- 請求項1又は請求項2において、前記導電層及び前記酸化物絶縁膜の下に酸化アルミニウム膜を含む絶縁膜を有することを特徴とする半導体装置。
- 請求項1乃至3のいずれか一項において、前記導電層と前記酸化物絶縁膜の間に酸化アルミニウム膜を含む絶縁膜を有することを特徴とする半導体装置。
- 請求項1乃至4のいずれか一項において、前記導電層の前記酸化物半導体膜側の最上面は窒素を含む金属酸化物膜であることを特徴とする半導体装置。
- 請求項1乃至5のいずれか一項において、前記ゲート電極層の前記酸化物半導体膜側の最下面は窒素を含む金属酸化物膜であることを特徴とする半導体装置。
- 導電層を形成し、
前記導電層上に酸化物絶縁膜を形成し、
前記酸化物絶縁膜に酸素ドープ処理を行い、前記導電層近傍に酸素過剰領域を形成し、
前記酸素過剰領域が設けられた酸化物絶縁膜に研磨処理を行い前記導電層による凸部を平坦化し、
前記平坦化された酸化物絶縁膜上にチャネル形成領域を含む酸化物半導体膜を形成し、
前記酸化物半導体膜上に前記酸化物半導体膜と電気的に接続するソース電極層及びドレイン電極層を形成し、
前記酸化物半導体膜、前記ソース電極層、及び前記ドレイン電極層上にゲート絶縁膜を形成し、
前記ゲート絶縁膜上に前記チャネル形成領域と重なるゲート電極層を形成し、
前記酸化物半導体膜、前記ソース電極層、前記ドレイン電極層、及び前記ゲート電極層上に酸化アルミニウム膜を含む絶縁膜を形成することを特徴とする半導体装置の作製方法。 - 請求項7において、前記研磨処理として化学的機械研磨法を用いることを特徴とする半導体装置の作製方法。
- 請求項7又は請求項8において、前記酸素ドープ処理としてイオン注入法を用いることを特徴とする半導体装置の作製方法。
- 請求項7乃至9のいずれか一項において、前記酸化物絶縁膜及び前記ゲート絶縁膜を、化学気相成長法を用いて形成することを特徴とする半導体装置の作製方法。
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US20130270563A1 (en) | 2013-10-17 |
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US9640639B2 (en) | 2017-05-02 |
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