JP2013038404A - 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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- JP2013038404A JP2013038404A JP2012152279A JP2012152279A JP2013038404A JP 2013038404 A JP2013038404 A JP 2013038404A JP 2012152279 A JP2012152279 A JP 2012152279A JP 2012152279 A JP2012152279 A JP 2012152279A JP 2013038404 A JP2013038404 A JP 2013038404A
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- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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Abstract
【解決手段】トランジスタの下地膜に化学機械研磨処理を行い、化学機械研磨処理した後、プラズマ処理を行うことで、下地膜の中心線平均粗さRa75値を、0.1nm未満とすることができる。プラズマ処理及び化学機械研磨処理の組み合わせにより得られた平坦性を有する下地膜上に結晶性の高い酸化物半導体層を形成することで、半導体装置の特性向上を図る。
【選択図】図1
Description
本実施の形態では、以下に示す手順で単結晶シリコン基板上の下地膜に平坦化処理を行い、その上に酸化物半導体層を有するトランジスタを作製し、下地膜の平坦性とトランジスタ特性、特にS値との関係を示す。なお、トランジスタの作製工程の断面図を図1に、作製したトランジスタの上面図を図2に示す。
本実施の形態では、実施の形態1と同じ条件の平坦化処理を行うことで、非常に優れた平坦性を有する下地膜のサンプルを測定して得られた平坦性データを図5に示す。図5(A)は、基板中央の断面曲線を示す図であり、図5(B)は基板端部の断面曲線を示す図である。また、再現性を確かめるため、別のサンプルを作製し、測定を行って図6に示すように、ほぼ同程度の平坦性を得ることを確認している。図5(A)及び図6(A)は、基板中央の断面曲線を示す図であり、図5(B)及び図6(B)は基板端部の断面曲線を示す図である。
本実施の形態では、実施の形態1と異なる平坦化処理を行うことで、中心線平均粗さRa75を0.1nm以下にする割合を増加することができる。
本実施の形態においては、異なるトランジスタを積層し、半導体装置を作製する例を図7に示す。本実施の形態では、シリコンを半導体層とするトランジスタを形成した後、平坦化し、その上に酸化物半導体層を半導体層とするトランジスタを積層する。以下に詳細な作製方法を示す。
本実施の形態では、同一基板上に少なくとも駆動回路の一部と、画素部に配置するトランジスタを有する表示装置を作製する例について以下に説明する。
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、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等のカメラ、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。上記実施の形態1で説明したトランジスタ460を具備する電子機器の例について説明する。
201 半導体基板
203 素子分離領域
207 ゲート絶縁膜
209 ゲート電極
211a 不純物領域
211b 不純物領域
215 絶縁膜
217 絶縁膜
219a コンタクトプラグ
219b コンタクトプラグ
221 絶縁膜
223a 配線
223b 配線
225 絶縁膜
400 基板
413 酸化物半導体層
421 ドーパント
422 ゲート保護膜
431 ソース電極層
432 ドレイン電極層
433 層間絶縁膜
434 層間絶縁膜
436 下地膜
441 ゲート電極
442 ゲート絶縁層
443 低抵抗領域
444 酸化物半導体膜
450 ソース配線
451 ドレイン配線
460 トランジスタ
461 トランジスタ
622 ゲート配線
623 ゲート配線
626 ドレイン電極層
628 トランジスタ
629 トランジスタ
651 液晶素子
652 液晶素子
690 容量配線
3001 本体
3002 筐体
3003a 表示部
3003b 表示部
3004 キーボードボタン
5001 表示部
5002 ヒンジ
5003 表示パネル
5004 操作ボタン
5005 携帯電話機
5006 タッチ入力ボタン
5300 基板
5301 画素部
5302 走査線駆動回路
5303 走査線駆動回路
5304 信号線駆動回路
6400 画素
6401 スイッチング用トランジスタ
6402 駆動用トランジスタ
6403 容量素子
6404 発光素子
6405 信号線
6406 走査線
6407 電源線
6408 共通電極
9600 テレビジョン装置
9601 筐体
9602 記憶媒体再生録画部
9603 表示部
9604 外部接続端子
9605 スタンド
9606 外部メモリ
Claims (8)
- 基板上に下地膜を形成し、
前記下地膜に化学機械研磨処理を行い、
前記化学機械研磨処理した後、プラズマ処理を行い、
前記プラズマ処理及び前記化学機械研磨処理により得られた平坦な表面上に酸化物半導体層を形成する半導体装置の作製方法。 - 請求項1において、前記プラズマ処理は、希ガスを用いたプラズマ処理であることを特徴とする半導体装置の作製方法。
- 基板上に下地膜を形成し、
前記下地膜に第1のプラズマ処理を行い、
前記第1のプラズマ処理した後、化学機械研磨処理を行い、
前記化学機械研磨処理後、第2のプラズマ処理を行い、
前記第1のプラズマ処理、前記化学機械研磨処理、及び前記第2のプラズマ処理により得られた平坦な表面上に酸化物半導体層を形成する半導体装置の作製方法。 - 請求項3において、前記第1のプラズマ処理及び前記第2のプラズマ処理は、希ガスを用いたプラズマ処理であることを特徴とする半導体装置の作製方法。
- 請求項1乃至4のいずれか一において、前記下地膜は、酸化シリコン膜、酸化ガリウム膜、酸化ハフニウム膜、または酸化アルミニウム膜であることを特徴とする半導体装置の作製方法。
- 請求項1乃至5のいずれか一において、前記基板は半導体基板であることを特徴とする半導体装置の作製方法。
- 請求項1乃至5のいずれか一において、前記基板はガラス基板であることを特徴とする半導体装置の作製方法。
- 請求項1乃至7のいずれか一において、前記プラズマ処理はICPエッチング装置で行うことを特徴とする半導体装置の作製方法。
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JP2015055763A (ja) * | 2013-09-12 | 2015-03-23 | セイコーエプソン株式会社 | 発光装置および電子機器 |
JP2015142047A (ja) * | 2014-01-29 | 2015-08-03 | 出光興産株式会社 | 積層構造、その製造方法及び薄膜トランジスタ |
JP2018139296A (ja) * | 2013-05-16 | 2018-09-06 | 株式会社半導体エネルギー研究所 | 半導体装置 |
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US9577110B2 (en) | 2013-12-27 | 2017-02-21 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device including an oxide semiconductor and the display device including the semiconductor device |
KR20240013863A (ko) | 2017-12-07 | 2024-01-30 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치, 및 반도체 장치의 제작 방법 |
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US20130011961A1 (en) | 2013-01-10 |
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US8664118B2 (en) | 2014-03-04 |
KR20130006310A (ko) | 2013-01-16 |
TW201308580A (zh) | 2013-02-16 |
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