JP2011135066A - 積層酸化物材料、半導体装置、および半導体装置の作製方法 - Google Patents
積層酸化物材料、半導体装置、および半導体装置の作製方法 Download PDFInfo
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- JP2011135066A JP2011135066A JP2010262862A JP2010262862A JP2011135066A JP 2011135066 A JP2011135066 A JP 2011135066A JP 2010262862 A JP2010262862 A JP 2010262862A JP 2010262862 A JP2010262862 A JP 2010262862A JP 2011135066 A JP2011135066 A JP 2011135066A
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Classifications
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- 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
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/02422—Non-crystalline insulating materials, e.g. glass, polymers
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Abstract
【解決手段】下地部材上に、酸化物部材を形成し、加熱処理を行って表面から内部に向かって結晶成長する第1の酸化物結晶部材を形成し、第1の酸化物結晶部材上に第2の酸化物結晶部材を積層して設ける積層酸化物材料の作製方法である。特に第1の酸化物結晶部材と第2の酸化物結晶部材がc軸を共通している。ホモ結晶成長またはヘテロ結晶成長の同軸(アキシャル)成長をさせていることである。
【選択図】図1
Description
本実施の形態では、トランジスタの作製例の一例を図1、図2、及び図3を用いて示す。
実施の形態1は、第1の酸化物部材と第2の酸化物部材に同一成分を含む酸化物半導体材料を用いる場合を示したが、本実施の形態では異なる成分の酸化物半導体材料を用いる場合を示す。
本実施の形態では、複数の結晶がc軸配向した結晶層を有する積層酸化物材料を含むトランジスタを作製し、該トランジスタを画素部、さらには駆動回路に用いて表示機能を有する半導体装置(表示装置ともいう)を作製する場合について説明する。また、トランジスタを、駆動回路の一部または全体を、画素部と同じ基板上に一体形成し、システムオンパネルを形成することができる。
半導体装置の一形態に相当する発光表示パネル(発光パネルともいう)の外観及び断面について、図13を用いて説明する。図13は、第1の基板上に形成されたc軸配向した結晶層を有する積層酸化物材料を含むトランジスタ及び発光素子を、第2の基板との間にシール材によって封止した、パネルの平面図であり、図13(B)は、図13(A)のH−Iにおける断面図に相当する。
半導体装置の一形態として電子ペーパーの例を示す。
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、例えば、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)、コンピュータ用などのモニタ、デジタルカメラ、デジタルビデオカメラ、デジタルフォトフレーム、携帯電話機(携帯電話、携帯電話装置ともいう)、携帯型ゲーム機、携帯情報端末、音響再生装置、パチンコ機などの大型ゲーム機などが挙げられる。
401 ゲート電極層
402 ゲート絶縁層
403 第1の酸化物半導体層
404 第2の酸化物半導体層
405a ソース電極層
405b ドレイン電極層
407 酸化物絶縁層
430 酸化物半導体積層
431 酸化物半導体積層
432 酸化物半導体積層
470 トランジスタ
501 酸化物部材
520 下地部材
521a 非晶質状態の領域
521b 酸化物結晶部材
522 酸化物部材
523a 酸化物結晶部材
523b 酸化物結晶部材
523c 非晶質状態のままの領域
532 酸化物部材
533b 酸化物結晶部材
580 基板
581 トランジスタ
583 絶縁層
587 電極層
588 電極層
589 球形粒子
590a 黒色領域
590b 白色領域
594 キャビティ
595 充填材
2700 電子書籍
2701 筐体
2703 筐体
2705 表示部
2707 表示部
2711 軸部
2721 電源
2723 操作キー
2725 スピーカ
2800 筐体
2801 筐体
2802 表示パネル
2803 スピーカー
2804 マイクロフォン
2805 操作キー
2806 ポインティングデバイス
2807 カメラ用レンズ
2808 外部接続端子
2810 太陽電池セル
2811 外部メモリスロット
3001 本体
3002 筐体
3003 表示部
3004 キーボード
3021 本体
3022 スタイラス
3023 表示部
3024 操作ボタン
3025 外部インターフェイス
3051 本体
3053 接眼部
3054 操作スイッチ
3055 表示部(B)
3056 バッテリー
3057 表示部(A)
4001 基板
4002 画素部
4003 信号線駆動回路
4004 走査線駆動回路
4005 シール材
4006 第2の基板
4008 液晶層
4010 トランジスタ
4011 トランジスタ
4013 液晶素子
4015 接続端子電極
4016 端子電極
4018 FPC
4019 異方性導電層
4020 絶縁層
4021 絶縁層
4030 画素電極層
4031 対向電極層
4032 絶縁層
4040 導電層
4501 第1の基板
4502 画素部
4503a、4503b 信号線駆動回路
4504a、4504b 走査線駆動回路
4505 シール材
4506 第2の基板
4507 充填材
4509 トランジスタ
4510 トランジスタ
4511 発光素子
4512 電界発光層
4513 電極層
4515 接続端子電極
4516 端子電極
4517 電極層
4518a、4518b FPC
4519 異方性導電層
4520 隔壁
4540 導電層
4541 絶縁層
4544 絶縁層
Claims (36)
- 下地部材上に、酸化物部材を形成し、加熱処理を行って表面から内部に向かって結晶成長する第1の酸化物結晶部材を形成し、且つ、前記下地部材の表面直上に非晶質成分を残存し、
前記第1の酸化物結晶部材上に第2の酸化物結晶部材を積層して設ける積層酸化物材料の作製方法。 - 下地部材上に、酸化物部材を形成し、加熱処理を行って表面から内部に向かって結晶成長する第1の酸化物結晶部材を形成し、且つ、前記下地部材の表面直上に非晶質成分を残存し、
前記第1の酸化物結晶部材上に同一材料であり、且つ、ホモ結晶成長をしている第2の酸化物結晶部材を積層して設ける積層酸化物材料の作製方法。 - 下地部材上に、酸化物部材を形成し、加熱処理を行って表面から内部に向かって結晶成長する第1の酸化物結晶部材を形成し、且つ、前記下地部材の表面直上に非晶質成分を残存し、
前記第1の酸化物結晶部材上に異なる材料であり、且つ、ヘテロ結晶成長をしている第2の酸化物結晶部材を積層して設ける積層酸化物材料の作製方法。 - 請求項1乃至3のいずれか一において、前記加熱処理は、450℃以上850℃以下での窒素雰囲気、酸素雰囲気、または乾燥空気雰囲気であることを特徴とする積層酸化物材料の作製方法。
- 請求項1乃至4のいずれか一において、前記第1の酸化物結晶部材と前記第2の酸化物結晶部材は、前記第1の酸化物結晶部材の表面に対して垂直方向にc軸配向をしていることを特徴とする積層酸化物材料の作製方法。
- 請求項1乃至5のいずれか一において、前記酸化物部材は、スパッタ法で形成される積層酸化物材料の作製方法。
- 請求項1乃至6のいずれか一において、第1の酸化物結晶部材及び第2の酸化物結晶部材は非単結晶である積層酸化物材料の作製方法。
- 請求項1乃至7のいずれか一において、前記第2の酸化物結晶部材は、成膜中の温度を200℃以上600℃以下に加熱しながら結晶成長させて得ることを特徴とする積層酸化物材料の作製方法。
- 請求項1乃至8のいずれか一において、前記第2の酸化物結晶部材は、スパッタ法を用いて形成され、その後または成膜と同時に加熱処理がなされており、その金属酸化物ターゲットの組成比は、In:Ga:Zn=1:x:y(xは0以上2以下、yは1以上5以下)である積層酸化物材料の作製方法。
- 請求項9において、前記金属酸化物ターゲットの組成比は、In:Ga:Zn=1:x:y(xは1、yは1)である積層酸化物材料の作製方法。
- 請求項9において、前記金属酸化物ターゲットの組成比は、In:Ga:Zn=1:x:y(xは0、yは1)である積層酸化物材料の作製方法。
- 請求項1乃至11のいずれか一において、第1の酸化物結晶部材は高純度の真性の導電型である積層酸化物材料の作製方法。
- 請求項1乃至11のいずれか一において、第2の酸化物結晶部材は高純度の真性の導電型である積層酸化物材料の作製方法。
- 請求項1乃至13のいずれか一において、前記積層酸化物材料のキャリア濃度は、1.0×1012cm−3未満である積層酸化物材料の作製方法。
- 請求項1乃至13のいずれか一において、前記積層酸化物材料のキャリア濃度は、1.45×1010cm−3未満である積層酸化物材料の作製方法。
- 請求項1乃至15のいずれか一において、前記第1の酸化物結晶部材の結晶配向した下側界面は、前記下地部材の表面と離間して設けることを特徴とする積層酸化物材料の作製方法。
- 下地部材上に、第1の酸化物結晶部材の表面から内部に向かって結晶成長する第1の酸化物結晶部材と、前記第1の酸化物結晶部材上に第2の酸化物結晶部材を積層してなる積層酸化物材料。
- 請求項17において、表面から内部に向かって結晶成長する前記第1の酸化物結晶部材は、前記第1の酸化物結晶部材の表面に対して垂直方向にc軸配向をしていることを特徴とする積層酸化物材料。
- 請求項17または請求項18において、第1の酸化物結晶部材の結晶配向した下側界面は、前記下地部材から離間して設けられたことを特徴とする積層酸化物材料。
- 請求項17乃至19のいずれか一において、前記下地部材は絶縁物表面または酸化物、窒化物、または金属表面を有する積層酸化物材料。
- 請求項17乃至20のいずれか一において、前記下地部材と前記第1の酸化物結晶部材の間に非晶質を含む酸化物部材を配置せしめることを特徴とする積層酸化物材料。
- 第1の酸化物結晶部材上に同一結晶構造の第2の酸化物結晶部材を前記第1の酸化物結晶部材の表面上方に少なくとも一部成長せしめることを特徴とする積層酸化物材料。
- 請求項22において、表面から内部に向かって結晶成長する前記第1の酸化物結晶部材は、前記第1の酸化物結晶部材の表面に対して垂直方向にc軸配向をしていることを特徴とする積層酸化物材料。
- 請求項22乃至23のいずれか一において、前記第1の酸化物結晶部材と前記第2の酸化物結晶部材は、同一成分を含む材料である積層酸化物材料。
- 請求項22乃至24のいずれか一において、前記第1の酸化物結晶部材と前記第2の酸化物結晶部材の電子親和力は同じである積層酸化物材料。
- 請求項22乃至25のいずれか一において、前記第1の酸化物結晶部材と前記第2の酸化物結晶部材の材料は異なる積層酸化物材料。
- 下地表面上に平坦表面を有するゲート電極層を形成し、
前記ゲート電極層上にゲート絶縁層を形成し、
前記ゲート絶縁層上に第1の酸化物半導体層を形成し、
第1の加熱処理を行って前記第1の酸化物半導体層の表面から内部に向かって結晶成長させて第1の非単結晶層を形成し、
前記第1の非単結晶層上に第2の酸化物半導体層を形成し、
第2の加熱処理を行って前記第1の非単結晶層からその上の前記第2酸化物半導体層表面に向かって結晶成長させて第2の非単結晶層を形成し、
前記第1の非単結晶層及び前記第2の非単結晶層の積層上にソース電極層またはドレイン電極層を形成し、
前記第1の非単結晶層の結晶配向している下側界面は、前記ゲート絶縁層の表面と離間していることを特徴とする半導体装置の作製方法。 - 請求項27において、前記第1の非単結晶層は、前記第1の非単結晶層の表面に対して垂直方向にc軸配向をしていることを特徴とする半導体装置の作製方法。
- 請求項27または請求項28において、前記第2の非単結晶層は、前記第2の非単結晶層の表面に対して垂直方向にc軸配向をしていることを特徴とする半導体装置の作製方法。
- 請求項27乃至29のいずれか一において、前記第2の酸化物半導体層の厚さは前記第1の酸化物半導体層の厚さよりも厚いことを特徴とする半導体装置の作製方法。
- 下地表面上に平坦表面を有するゲート電極層と、
前記ゲート電極層上にゲート絶縁層と、
前記ゲート絶縁層上に非晶質を含む金属酸化物層と、
前記非晶質を含む金属酸化物層上に、表面に対して垂直方向にc軸配向をしている第1の非単結晶層と、
前記第1の非単結晶層上に接し、且つ、表面に対して垂直方向にc軸配向をしている第2の非単結晶層と、
前記第1の非単結晶層及び前記第2の非単結晶層の積層上にソース電極層またはドレイン電極層とを有し、
前記第1の非単結晶層及び前記第2の非単結晶層は、金属酸化物層であることを特徴とする半導体装置。 - 請求項31において、前記第2の非単結晶層の厚さは前記第1の非単結晶層の厚さよりも厚いことを特徴とする半導体装置。
- 請求項31または請求項32において、前記第1の非単結晶層と前記第2の非単結晶層の電子親和力は同じであることを特徴とする半導体装置。
- 請求項31または請求項32において、前記第1の非単結晶層と前記第2の非単結晶層の材料は異なることを特徴とする半導体装置。
- 請求項31乃至34のいずれか一において、前記第2の非単結晶層表面の前記ゲート電極層と重なる領域の高低差は、1nm以下であることを特徴とする半導体装置。
- 請求項31乃至34のいずれか一において、前記第2の非単結晶層表面の前記ゲート電極層と重なる領域の高低差は、0.2nm以下であることを特徴とする半導体装置。
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