JP2014135478A - 半導体装置およびその作製方法 - Google Patents
半導体装置およびその作製方法 Download PDFInfo
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- JP2014135478A JP2014135478A JP2013244852A JP2013244852A JP2014135478A JP 2014135478 A JP2014135478 A JP 2014135478A JP 2013244852 A JP2013244852 A JP 2013244852A JP 2013244852 A JP2013244852 A JP 2013244852A JP 2014135478 A JP2014135478 A JP 2014135478A
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Classifications
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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
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- 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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- 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
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- H01L27/1274—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement using crystallisation of amorphous semiconductor or recrystallisation of crystalline semiconductor
- H01L27/1285—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement using crystallisation of amorphous semiconductor or recrystallisation of crystalline semiconductor using control of the annealing or irradiation parameters, e.g. using different scanning direction or intensity for different transistors
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- 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
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- 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
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/24—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only semiconductor materials not provided for in groups H01L29/16, H01L29/18, H01L29/20, H01L29/22
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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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
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- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
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- H01L21/02104—Forming layers
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Abstract
【解決手段】チャネルが形成される領域が保護された半導体装置である。チャネルが形成される領域を保護する領域を、半導体層内に有する半導体装置である。チャネルが形成される領域を保護する層を有する半導体装置である。チャネルが形成される領域を保護する領域または/および層の欠陥準位密度が低い半導体装置である。チャネルが形成される領域は欠陥準位密度が低い半導体装置である。
【選択図】図1
Description
以下では、本発明の一態様に係る半導体層の一例として、トランジスタのチャネル形成領域に用いることのできる酸化物半導体層についてモデルを用いて説明する。
図1は、絶縁膜上に設けられた酸化物半導体層の断面図、およびバンド構造を示す図である。
図2は、絶縁膜上に設けられた酸化物半導体層の断面図、およびバンド構造を示す図である。
酸化物半導体層が島状に形成される場合、モデルBを酸化物半導体層の側面部まで拡張することができる。図3は、絶縁膜上に設けられた酸化物半導体層の断面図、およびバンド構造を示す図である。
酸化物半導体層の欠陥準位の一種である酸素欠損に関連する準位について説明する。ここでは、酸化物半導体層がIn−Ga−Zn酸化物である場合について説明する。
以下では、多層膜306を用いたトランジスタについて説明する。
本項では、ボトムゲート型トランジスタについて説明する。ここでは、ボトムゲート型トランジスタの一種であるボトムゲートトップコンタクト構造(BGTC構造)のトランジスタについて図6を用いて説明する。
以下では、多層膜306、ならびに多層膜306を構成する酸化物半導体層306aおよび酸化物半導体層306bについて説明する。
ソース電極316aおよびドレイン電極316bは、アルミニウム、チタン、クロム、コバルト、ニッケル、銅、イットリウム、ジルコニウム、モリブデン、ルテニウム、銀、タンタルおよびタングステンを一種以上含む導電膜を、単層で、または積層で用いればよい。好ましくは、ソース電極316aおよびドレイン電極316bは、銅を含む層を有する多層膜とする。ソース電極316aおよびドレイン電極316bを、銅を含む層を有する多層膜とすることで、ソース電極316aおよびドレイン電極316bと同じ工程で形成された層で配線を形成する場合、配線抵抗を低くすることができる。なお、ソース電極316aとドレイン電極316bは同一組成であってもよいし、異なる組成であってもよい。
絶縁膜318は、酸化アルミニウム、酸化マグネシウム、酸化シリコン、酸化窒化シリコン、窒化酸化シリコン、窒化シリコン、酸化ガリウム、酸化ゲルマニウム、酸化イットリウム、酸化ジルコニウム、酸化ランタン、酸化ネオジム、酸化ハフニウムおよび酸化タンタルを一種以上含む絶縁膜を、単層で、または積層で用いればよい。
ゲート絶縁膜312は、酸化アルミニウム、酸化マグネシウム、酸化シリコン、酸化窒化シリコン、窒化酸化シリコン、窒化シリコン、酸化ガリウム、酸化ゲルマニウム、酸化イットリウム、酸化ジルコニウム、酸化ランタン、酸化ネオジム、酸化ハフニウムおよび酸化タンタルを一種以上含む絶縁膜を、単層で、または積層で用いればよい。
ゲート電極304は、アルミニウム、チタン、クロム、コバルト、ニッケル、銅、イットリウム、ジルコニウム、モリブデン、ルテニウム、銀、タンタルおよびタングステンを一種以上含む導電膜を、単層で、または積層で用いればよい。
基板300に大きな制限はない。例えば、ガラス基板、セラミック基板、石英基板、サファイア基板などを、基板300として用いてもよい。また、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(Silicon On Insulator)基板などを適用することも可能であり、これらの基板上に半導体素子が設けられたものを、基板300として用いてもよい。
ここで、トランジスタの作製方法について図8および図9を用いて説明する。
酸化物半導体層に含まれる不純物濃度が低いことによって、トランジスタの電気特性は安定となる。また、酸化物半導体層が高い結晶性を有することで、酸化物半導体層が非晶質である場合と比べて、トランジスタの電気特性は安定となる。以下では、不純物濃度が低く、結晶性の高い酸化物半導体層を成膜するための成膜装置について説明する。
本項では、トップゲート型トランジスタについて説明する。ここでは、トップゲート型トランジスタの一種であるトップゲートトップコンタクト構造(TGTC構造)のトランジスタについて図10を用いて説明する。
ここで、トランジスタの作製方法について図11および図12を用いて説明する。
以下では、上述したトランジスタを用いた応用製品について説明する。
本項では、上述したトランジスタを適用した表示装置について説明する。
まずはEL素子を用いた表示装置(EL表示装置ともいう。)について説明する。
次に、液晶素子を用いた表示装置(液晶表示装置ともいう。)について説明する。
以下では、本発明の一態様に係る、被検知体の近接または接触を検知可能なセンサ(以降、タッチセンサと呼ぶ)の構成例について説明する。
図31(A)、図31(B)は、相互容量方式のタッチセンサの構成を示す模式図と、入出力波形の模式図である。タッチセンサは一対の電極を備え、これらの間に容量が形成されている。一対の電極のうち一方の電極に入力電圧が入力される。また、他方の電極に流れる電流(または、他方の電極の電位)を検出する検出回路を備える。
図31(C)は、マトリクス状に配置された複数の容量を備えるタッチセンサの構成例を示す。
以下では、複数の画素を有する表示部にタッチセンサを組み込んだタッチパネルの構成例について説明する。ここでは、画素に設けられる表示素子として、液晶素子を適用した例を示す。なお、画素に設けられる表示素子として、EL素子を適用しても構わない。
以下、図33および図34を用いて、上述したタッチパネルの動作について説明する。
以下では、上記タッチパネルに用いることのできる画素の構成例について説明する。
上述したトランジスタは、さまざまな電子機器に搭載されるマイクロコンピュータに適用することができる。
図38は、上述したトランジスタを少なくとも一部に用いたCPUの具体的な構成を示すブロック図である。
図39(A)において、テレビジョン装置8000は、筐体8001に表示部8002が組み込まれており、表示部8002により映像を表示し、スピーカ部8003から音声を出力することが可能である。上述のトランジスタを表示部8002に用いることが可能である。
70b 成膜室
71 大気側基板供給室
72a ロードロック室
72b アンロードロック室
73 搬送室
73a 搬送室
73b 搬送室
74 カセットポート
75 基板加熱室
76 基板搬送ロボット
80a 成膜室
80b 成膜室
80c 成膜室
80d 成膜室
81 大気側基板供給室
82 ロード/アンロードロック室
83 搬送室
84 カセットポート
85 基板加熱室
86 基板搬送ロボット
87 ターゲット
88 防着板
89 ガラス基板
90 基板ステージ
92 基板ステージ
93 加熱機構
94 精製機
95a クライオポンプ
95b クライオポンプ
95c ターボ分子ポンプ
95d クライオポンプ
95e クライオポンプ
95f クライオポンプ
96 真空ポンプ
96a 真空ポンプ
96b 真空ポンプ
96c 真空ポンプ
97 マスフローコントローラ
98 ガス加熱機構
99 クライオトラップ
100 基板
106 酸化物半導体層
106a 酸化物半導体層
106a1 酸化物半導体層
106b 酸化物半導体層
106b1 酸化物半導体層
106b2 酸化物半導体層
112 絶縁膜
118 絶縁膜
206 酸化物半導体層
206a 酸化物半導体層
206b 酸化物半導体層
206b1 酸化物半導体層
206c 酸化物半導体層
206c1 酸化物半導体層
206c2 酸化物半導体層
206d 酸化物半導体層
300 基板
304 ゲート電極
306 多層膜
306a 酸化物半導体層
306a1 酸化物半導体層
306b 酸化物半導体層
306b1 酸化物半導体層
306c ソース領域
306d ドレイン領域
312 ゲート絶縁膜
316a ソース電極
316a1 導電層
316a2 導電層
316a3 導電層
316a4 導電層
316b ドレイン電極
316b1 導電層
316b2 導電層
316b3 導電層
316b4 導電層
318 絶縁膜
318a 酸化シリコン層
318b 酸化シリコン層
318c 窒化シリコン層
400 基板
401 半導体基板
402 下地絶縁膜
403 素子分離領域
404 ゲート電極
406 多層膜
406a 酸化物半導体層
406a1 酸化物半導体層
406b 酸化物半導体層
406b1 酸化物半導体層
406c ソース領域
406d ドレイン領域
407 ゲート絶縁膜
409 ゲート電極
411a 不純物領域
411b 不純物領域
412 ゲート絶縁膜
415 絶縁膜
416a ソース電極
416b ドレイン電極
416c 電極
417 絶縁膜
418 絶縁膜
419a コンタクトプラグ
419b コンタクトプラグ
420 絶縁膜
421 絶縁膜
422 絶縁膜
423a 配線
423b 配線
424 電極
425 絶縁膜
445 絶縁膜
449 配線
456 配線
460 半導体膜
500 マイクロコンピュータ
501 直流電源
502 バスライン
503 パワーゲートコントローラ
504 パワーゲート
505 CPU
506 揮発性記憶部
507 不揮発性記憶部
508 インターフェース
509 検出部
511 光センサ
512 アンプ
513 ADコンバータ
514 光電変換素子
517 トランジスタ
519 トランジスタ
530 発光素子
700 基板
719 発光素子
720 絶縁膜
721 絶縁膜
731 端子
732 FPC
733a 配線
733b 配線
733c 配線
734 シール材
735 駆動回路
736 駆動回路
737 画素
741 トランジスタ
742 キャパシタ
743 スイッチ素子
744 信号線
750 画素
751 トランジスタ
752 キャパシタ
753 液晶素子
754 走査線
755 信号線
781 電極
782 発光層
783 電極
784 隔壁
785a 中間層
785b 中間層
785c 中間層
785d 中間層
786a 発光層
786b 発光層
786c 発光層
791 電極
792 絶縁膜
793 液晶層
794 絶縁膜
795 スペーサ
796 電極
797 基板
1000 ターゲット
1001 イオン
1002 スパッタ粒子
1003 酸化物半導体層
1004 非晶質膜
1005 劈開面
1006 部分
1007 プラズマ
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
3100 液晶層
3101 基板
3102 基板
3103 偏光板
3104 偏光板
3105 液晶分子
3108 電極
3109 電極
3109a 電極
3109b 電極
3109c 電極
3150 電極
3150a 電極
3150b 電極
3150c 電極
3151 電極
3151a 電極
3151b 電極
3151c 電極
3154 絶縁膜
3158 突起物
3159 突起物
3162 絶縁膜
3163 絶縁膜
3501 配線
3502 配線
3503 トランジスタ
3504 液晶素子
3510 配線
3510_1 配線
3510_2 配線
3511 配線
3515_1 ブロック
3515_2 ブロック
3516 ブロック
3521 トランジスタ
3522 電極
3523 電極
3524 液晶
3525 カラーフィルタ
3526 配線
8001 筐体
8100 警報装置
8101 マイクロコンピュータ
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
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 (9)
- 酸化物半導体層と、前記酸化物半導体層と接するゲート絶縁膜と、前記ゲート絶縁膜を介して前記酸化物半導体層と重なるゲート電極と、を有し、
前記酸化物半導体層の上面から深さが0nm以上5nm未満の領域は、深さが5nm以上の領域と比べてエネルギーギャップが大きい領域を有することを特徴とする半導体装置。 - 請求項1において、
前記酸化物半導体層は、第2の酸化物半導体層を介して設けられた電極を有し、
前記第2の酸化物半導体層は、前記酸化物半導体層の上面から深さが5nm以上の領域よりエネルギーギャップが大きい領域を有することを特徴とする半導体装置。 - インジウムおよび元素M(アルミニウム、ガリウム、イットリウム、ジルコニウムまたはスズ)を含む酸化物半導体層と、前記酸化物半導体層と接するゲート絶縁膜と、前記ゲート絶縁膜を介して前記酸化物半導体層と重なるゲート電極と、を有し、
前記酸化物半導体層は、上面から深さが0nm以上5nm未満の範囲に、インジウムの原子数比が元素Mの原子数比より低い領域を有することを特徴とする半導体装置。 - 請求項3において、
前記酸化物半導体層は、第2の酸化物半導体層を介して設けられた電極を有し、
前記第2の酸化物半導体層は、インジウムの原子数比が元素Mの原子数比より低い領域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4のいずれか一において、
前記酸化物半導体層は、前記ゲート絶縁膜と対向する側でシリコンを含む絶縁膜と接し、かつ前記絶縁膜から離れた領域にチャネルが形成される領域を有することを特徴とする半導体装置。 - ゲート電極を形成し、
前記ゲート電極上にゲート絶縁膜を形成し、
前記ゲート絶縁膜上に第1の酸化物半導体層を形成し、前記第1の酸化物半導体層上に第2の酸化物半導体層を形成することで、前記第1の酸化物半導体層と前記第2の酸化物半導体層との間に、前記第1の酸化物半導体層と前記第2の酸化物半導体層との混合領域を形成し、
前記第2の酸化物半導体層上に導電膜を形成し、
前記導電膜の一部をエッチングすることで、前記第2の酸化物半導体層を露出させ、
前記第2の酸化物半導体層の露出した領域を前記第2の酸化物半導体層が0nm以上5nm未満となるようエッチングすることを特徴とする半導体装置の作製方法。 - 請求項6において、
前記第2の酸化物半導体層は、前記第1の酸化物半導体層よりエネルギーギャップが大きい領域を有することを特徴とする半導体装置の作製方法。 - 請求項6または請求項7において、
前記第2の酸化物半導体層および前記第1の酸化物半導体層は、インジウムおよび元素M(アルミニウム、ガリウム、イットリウム、ジルコニウムまたはスズ)を含み、
前記第2の酸化物半導体層は、前記第1の酸化物半導体層より元素Mの原子数比が高い領域を有することを特徴とする半導体装置の作製方法。 - 請求項6乃至請求項8のいずれか一において、
前記第2の酸化物半導体層は、スパッタリング法により、基板温度100℃以上500℃未満で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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US10269835B2 (en) | 2019-04-23 |
KR102209665B1 (ko) | 2021-01-28 |
US20160254295A1 (en) | 2016-09-01 |
US9406810B2 (en) | 2016-08-02 |
US20140151687A1 (en) | 2014-06-05 |
KR20140071259A (ko) | 2014-06-11 |
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