JP6628507B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6628507B2 JP6628507B2 JP2015122513A JP2015122513A JP6628507B2 JP 6628507 B2 JP6628507 B2 JP 6628507B2 JP 2015122513 A JP2015122513 A JP 2015122513A JP 2015122513 A JP2015122513 A JP 2015122513A JP 6628507 B2 JP6628507 B2 JP 6628507B2
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- film
- insulating film
- oxide semiconductor
- oxygen
- transistor
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- 239000004065 semiconductor Substances 0.000 title claims description 460
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- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-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
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 description 1
- RGGPNXQUMRMPRA-UHFFFAOYSA-N triethylgallium Chemical compound CC[Ga](CC)CC RGGPNXQUMRMPRA-UHFFFAOYSA-N 0.000 description 1
- MCULRUJILOGHCJ-UHFFFAOYSA-N triisobutylaluminium Chemical compound CC(C)C[Al](CC(C)C)CC(C)C MCULRUJILOGHCJ-UHFFFAOYSA-N 0.000 description 1
- VEDJZFSRVVQBIL-UHFFFAOYSA-N trisilane Chemical compound [SiH3][SiH2][SiH3] VEDJZFSRVVQBIL-UHFFFAOYSA-N 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
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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
- 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
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- 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
- H01L27/1248—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 or shape of the interlayer dielectric specially adapted to the circuit arrangement
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Description
本実施の形態では、本発明の一態様の半導体装置について、図1乃至図14を参照して説明する。
図1(A)は、本発明の一態様の半導体装置であるトランジスタ100の上面図であり、図1(B)は、図1(A)に示す一点鎖線X1−X2間における切断面の断面図に相当し、図1(C)は、図1(A)に示す一点鎖線Y1−Y2間における切断面の断面図に相当する。なお、図1(A)において、煩雑になることを避けるため、トランジスタ100の構成要素の一部(ゲート絶縁膜として機能する絶縁膜等)を省略して図示している。また、一点鎖線X1−X2方向をチャネル長方向、一点鎖線Y1−Y2方向をチャネル幅方向と呼称する場合がある。なお、トランジスタの上面図においては、以降の図面においても図1(A)と同様に、構成要素の一部を省略して図示する場合がある。
基板202上に絶縁膜204と、絶縁膜204上に酸素の放出を抑制できる機能を有する膜230とを形成した(図2(B)参照)。
試料A2は、先に示す試料A1と比較し、図2(C)に示す酸素添加処理を行っていない。すなわち、試料A2は、絶縁膜204上に酸素の放出を抑制できる機能を有する膜230を形成した後、酸素添加処理を行わず、そのまま酸素の放出を抑制できる機能を有する膜230を除去し、絶縁膜206を形成した試料である。
基板102の材質などに大きな制限はないが、少なくとも、後の熱処理に耐えうる程度の耐熱性を有している必要がある。例えば、ガラス基板、セラミック基板、石英基板、サファイア基板等を、基板102として用いてもよい。また、シリコンや炭化シリコンを材料とした単結晶半導体基板、多結晶半導体基板、シリコンゲルマニウム等の化合物半導体基板、SOI基板等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102として用いてもよい。なお、基板102として、ガラス基板を用いる場合、第6世代(1500mm×1850mm)、第7世代(1870mm×2200mm)、第8世代(2200mm×2400mm)、第9世代(2400mm×2800mm)、第10世代(2950mm×3400mm)等の大面積基板を用いることで、大型の表示装置を作製することができる。
第1のゲート電極として機能する導電膜104、及びソース電極及びドレイン電極として機能する導電膜112a、112bとしては、クロム(Cr)、銅(Cu)、アルミニウム(Al)、金(Au)、銀(Ag)、亜鉛(Zn)、モリブデン(Mo)、タンタル(Ta)、チタン(Ti)、タングステン(W)、マンガン(Mn)、ニッケル(Ni)、鉄(Fe)、コバルト(Co)から選ばれた金属元素、または上述した金属元素を成分とする合金か、上述した金属元素を組み合わせた合金等を用いてそれぞれ形成することができる。
トランジスタ100の第1のゲート絶縁膜として機能する絶縁膜106、107としては、プラズマ化学気相堆積(PECVD:(Plasma Enhanced Chemical Vapor Deposition))法、スパッタリング法等により、酸化シリコン膜、酸化窒化シリコン膜、窒化酸化シリコン膜、窒化シリコン膜、酸化アルミニウム膜、酸化ハフニウム膜、酸化イットリウム膜、酸化ジルコニウム膜、酸化ガリウム膜、酸化タンタル膜、酸化マグネシウム膜、酸化ランタン膜、酸化セリウム膜および酸化ネオジム膜を一種以上含む絶縁層を、それぞれ用いることができる。なお、絶縁膜106、107の積層構造とせずに、上述の材料から選択された単層の絶縁膜、または3層以上の絶縁膜を用いてもよい。
酸化物半導体膜108は、酸素と、Inと、Znと、M(Mは、Ti、Ga、Sn、Y、Zr、La、Ce、Nd、またはHf)とを有する。代表的には、酸化物半導体膜108は、In−Ga酸化物、In−Zn酸化物、In−M−Zn酸化物を用いることができる。とくに、酸化物半導体膜108としては、In−M−Zn酸化物を用いると好ましい。
絶縁膜114、116、118は、保護絶縁膜としての機能を有する。絶縁膜114、116は、酸素を有する。また、絶縁膜114は、酸素を透過することのできる絶縁膜である。なお、絶縁膜114は、後に形成する絶縁膜116を形成する際の、酸化物半導体膜108へのダメージ緩和膜としても機能する。
次に、図1(A)(B)(C)に示すトランジスタ100と異なる構成例について、図4(A)(B)(C)を用いて説明する。なお、先に説明した機能と同様の機能を有する場合には、ハッチパターンを同じくし、特に符号を付さない場合がある。
次に、図4(A)(B)(C)に示すトランジスタ150と異なる構成例について、図5(A)(B)(C)を用いて説明する。なお、先に説明した機能と同様の機能を有する場合には、ハッチパターンを同じくし、特に符号を付さない場合がある。
次に、図1(A)(B)(C)に示すトランジスタ100と異なる構成例について、図6(A)(B)(C)を用いて説明する。なお、先に説明した機能と同様の機能を有する場合には、ハッチパターンを同じくし、特に符号を付さない場合がある。
次に、図1(A)(B)(C)に示すトランジスタ100と異なる構成例について、図7(A)(B)(C)(D)を用いて説明する。なお、先に説明した機能と同様の機能を有する場合には、ハッチパターンを同じくし、特に符号を付さない場合がある。
次に、本発明の一態様の半導体装置である図1に示すトランジスタ100の作製方法について、図9及び図10を用いて以下詳細に説明する。
次に、本発明の一態様の半導体装置である図4に示すトランジスタ150の作製方法について、図11及び図12を用いて、以下詳細に説明する。
次に、本発明の一態様の半導体装置である図6に示すトランジスタ170の作製方法について、図13及び図14を用いて、以下詳細に説明する。
本実施の形態では、本発明の一態様の半導体装置に含まれる酸化物半導体膜の構成について以下詳細に説明を行う。
本実施の形態においては、先の実施の形態で例示したトランジスタを有する表示装置の一例について、図15乃至図17を用いて以下説明を行う。
図16及び図17に示す表示装置700は、引き回し配線部711と、画素部702と、ソースドライバ回路部704と、FPC端子部708と、を有する。また、引き回し配線部711は、信号線710を有する。また、画素部702は、トランジスタ750及び容量素子790を有する。また、ソースドライバ回路部704は、トランジスタ752を有する。
図16に示す表示装置700は、液晶素子775を有する。液晶素子775は、導電膜772、導電膜774、及び液晶層776を有する。導電膜774は、第2の基板705側に設けられ、対向電極としての機能を有する。図16に示す表示装置700は、導電膜772と導電膜774に印加される電圧によって、液晶層776の配向状態が変わることによって光の透過、非透過が制御され画像を表示することができる。
図17に示す表示装置700は、発光素子782を有する。発光素子782は、導電膜784、EL層786、及び導電膜788を有する。図17に示す表示装置700は、発光素子782が有するEL層786が発光することによって、画像を表示することができる。
本実施の形態では、本発明の一態様の半導体装置を有する表示装置について、図18を用いて説明を行う。
本実施の形態では、本発明の一態様の半導体装置を有する表示モジュール及び電子機器について、図19及び図20を用いて説明を行う。
まず、基板602上に導電膜を形成し、その後、該導電膜を除去した。基板602としては、ガラス基板を用いた。また、上記導電膜としては、厚さ100nmのタングステン膜を、スパッタリング装置を用いて形成した。また、上記導電膜の除去としては、ドライエッチング装置を用いた。
絶縁膜616上に、厚さ5nmのITSO膜を、スパッタリング装置を用いて形成した。なお、ITSO膜に用いたターゲットの組成としては、In2O3:SnO2:SiO2=85:10:5[重量%]とした。
次に、ITSO膜上から酸素添加処理を行った。酸素添加処理としては、アッシング装置を用い、流量250sccmの酸素ガスをチャンバー内に導入し、圧力を15Paとし、基板側にバイアスが印加されるように、アッシング装置内に設置された平行平板の電極間に4500WのRF電力を供給して行った。
次に、ITSO膜を除去し、絶縁膜616を露出させた。また、ITSO膜の除去としては、ウエットエッチング装置を用い、濃度5%のシュウ酸水溶液を絶縁膜616上に塗布し、300secのエッチングを行った後、濃度0.5%のフッ化水素酸を絶縁膜616上に塗布し、15secのエッチングを行った。
試料C1及び試料C2としては、基板内にチャネル長L=3μm、チャネル幅W=50μmサイズの5個のトランジスタを、それぞれ作製した。
100A トランジスタ
100B トランジスタ
102 基板
104 導電膜
106 絶縁膜
107 絶縁膜
108 酸化物半導体膜
108a 酸化物半導体膜
108b 酸化物半導体膜
108c 酸化物半導体膜
112a 導電膜
112b 導電膜
114 絶縁膜
116 絶縁膜
117 酸化物半導体膜
118 絶縁膜
120 導電膜
120a 導電膜
120b 導電膜
130 膜
139 酸素
141a 開口部
141b 開口部
142 エッチャント
142a 開口部
142b 開口部
142c 開口部
150 トランジスタ
160 トランジスタ
170 トランジスタ
180b 酸化物半導体膜
200 半導体装置
202 基板
204 絶縁膜
206 絶縁膜
230 膜
239 酸素
242 エッチャント
501 画素回路
502 画素部
504 駆動回路部
504a ゲートドライバ
504b ソースドライバ
506 保護回路
507 端子部
550 トランジスタ
552 トランジスタ
554 トランジスタ
560 容量素子
562 容量素子
570 液晶素子
572 発光素子
600 分析用サンプル
602 基板
604 導電膜
606 絶縁膜
607 絶縁膜
608 酸化物半導体膜
608a 酸化物半導体膜
612a 導電膜
612b 導電膜
614 絶縁膜
616 絶縁膜
618 絶縁膜
620a 導電膜
620b 導電膜
642a 開口部
642b 開口部
642c 開口部
650 トランジスタ
700 表示装置
701 基板
702 画素部
704 ソースドライバ回路部
705 基板
706 ゲートドライバ回路部
708 FPC端子部
710 信号線
711 配線部
712 シール材
716 FPC
730 絶縁膜
732 封止膜
734 絶縁膜
736 着色膜
738 遮光膜
750 トランジスタ
752 トランジスタ
760 接続電極
764 絶縁膜
766 絶縁膜
767 酸化物半導体膜
768 絶縁膜
770 平坦化絶縁膜
772 導電膜
774 導電膜
775 液晶素子
776 液晶層
778 構造体
780 異方性導電膜
782 発光素子
784 導電膜
786 EL層
788 導電膜
790 容量素子
8000 表示モジュール
8001 上部カバー
8002 下部カバー
8003 FPC
8004 タッチパネル
8005 FPC
8006 表示パネル
8007 バックライト
8008 光源
8009 フレーム
8010 プリント基板
8011 バッテリ
9000 筐体
9001 表示部
9003 スピーカ
9005 操作キー
9006 接続端子
9007 センサ
9008 マイクロフォン
9050 操作ボタン
9051 情報
9052 情報
9053 情報
9054 情報
9055 ヒンジ
9100 携帯情報端末
9101 携帯情報端末
9102 携帯情報端末
9200 携帯情報端末
9201 携帯情報端末
Claims (3)
- 第1の絶縁膜と、
前記第1の絶縁膜上の酸化物半導体膜と、
前記酸化物半導体膜上の第2の絶縁膜と、
前記第2の絶縁膜上の第3の絶縁膜と、を有し、
前記第2の絶縁膜は、酸素と、シリコンと、を有し、
前記第3の絶縁膜は、窒素と、シリコンと、を有し、
前記第2の絶縁膜と、前記第3の絶縁膜との界面近傍にインジウムを有し、
前記第2の絶縁膜の膜厚方向の中央の領域におけるインジウム濃度は、前記第2の絶縁膜と前記第3の絶縁膜との界面近傍におけるインジウム濃度より低く、
前記第3の絶縁膜の膜厚方向の中央の領域におけるインジウム濃度は、前記第2の絶縁膜と前記第3の絶縁膜との界面近傍におけるインジウム濃度より低い、半導体装置。 - ゲート電極と、
前記ゲート電極上の第1の絶縁膜と、
前記第1の絶縁膜上の酸化物半導体膜と、
前記酸化物半導体膜に電気的に接続されるソース電極と、
前記酸化物半導体膜に電気的に接続されるドレイン電極と、
前記酸化物半導体膜、前記ソース電極、及び前記ドレイン電極上の第2の絶縁膜と、
前記第2の絶縁膜上の第3の絶縁膜と、を有し、
前記第2の絶縁膜は、酸素と、シリコンと、を有し、
前記第3の絶縁膜は、窒素と、シリコンと、を有し、
前記第2の絶縁膜と、前記第3の絶縁膜との界面近傍にインジウムを有し、
前記第2の絶縁膜の膜厚方向の中央の領域におけるインジウム濃度は、前記第2の絶縁膜と前記第3の絶縁膜との界面近傍におけるインジウム濃度より低く、
前記第3の絶縁膜の膜厚方向の中央の領域におけるインジウム濃度は、前記第2の絶縁膜と前記第3の絶縁膜との界面近傍におけるインジウム濃度より低い、半導体装置。 - 請求項1または請求項2において、
前記酸化物半導体膜は、
酸素と、Inと、Znと、M(Mは、Ti、Ga、Sn、Y、Zr、La、Ce、Nd、またはHf)と、を有する、ことを特徴とする半導体装置。
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US11282865B2 (en) | 2022-03-22 |
US10490572B2 (en) | 2019-11-26 |
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WO2015193766A1 (en) | 2015-12-23 |
US20200135773A1 (en) | 2020-04-30 |
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US9640555B2 (en) | 2017-05-02 |
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JP2023095986A (ja) | 2023-07-06 |
US20170236845A1 (en) | 2017-08-17 |
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