JP2013048219A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP2013048219A JP2013048219A JP2012160136A JP2012160136A JP2013048219A JP 2013048219 A JP2013048219 A JP 2013048219A JP 2012160136 A JP2012160136 A JP 2012160136A JP 2012160136 A JP2012160136 A JP 2012160136A JP 2013048219 A JP2013048219 A JP 2013048219A
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- Prior art keywords
- oxide semiconductor
- pair
- semiconductor film
- film
- insulating film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 457
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- 239000001301 oxygen Substances 0.000 claims abstract description 212
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- 125000004429 atom Chemical group 0.000 claims description 40
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 39
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Abstract
【解決手段】酸化物半導体を有するトランジスタを備える半導体装置において、ゲート電圧が負のときの電流が小さいトランジスタの酸化物半導体膜と、電界効果移動度が高くオン電流が大きいトランジスタの酸化物半導体膜において、酸素濃度が異なる。代表的には、ゲート電圧が負のときの電流が小さいトランジスタの酸化物半導体膜と比較して、電界効果移動度が高くオン電流が大きいトランジスタの酸化物半導体膜の酸素濃度が低い。
【選択図】図1
Description
本実施の形態では、ゲート電圧が負のときの電流が小さいトランジスタと、電界効果移動度が高くオン電流が大きいトランジスタとを有する半導体装置の構造及び作製方法について、図1乃至図3を用いて説明する。本実施の形態のトランジスタは、コプレナー型のトップゲートトランジスタであって、一対の電極が酸化物半導体膜の側面及び表面の一部を覆うことを特徴とする。
本実施の形態では、実施の形態1と異なる構造のトランジスタ及びのその作製方法について、図2、図4及び図5を用いて説明する。本実施の形態では、コプレナー型のトップゲートトランジスタについて説明する。
本実施の形態では、実施の形態1及び実施の形態2と異なる構造のトランジスタの構造及び作製方法について、図2、図6乃至図8を用いて説明する。本実施の形態に示すトランジスタは、実施の形態1と比較して、酸化物半導体膜の構造が異なる。
本実施の形態は、実施の形態1乃至実施の形態3と異なる構造のトランジスタの構造及び作製方法について、図2、図9及び図10を用いて説明する。本実施の形態に示すトランジスタは、ゲート電極の側面にサイドウォール絶縁膜を有する点が実施の形態1乃至実施の形態3と異なる。
本実施の形態では、実施の形態1及び実施の形態3において、酸化物半導体膜、一対の電極、及びゲート電極の構造の異なるトランジスタについて、図11を用いて説明する。
本実施の形態では、実施の形態1、実施の形態3、及び実施の形態5において、一対の電極の構造の異なるトランジスタについて、説明する。
本実施の形態では、実施の形態1乃至実施の形態6と異なる構造のトランジスタの構造及び作製方法について、図13及び図14を用いて説明する。本実施の形態では、逆スタガ型のボトムゲートトランジスタについて説明する。
本実施の形態では、実施の形態1乃至実施の形態7と異なる構造のトランジスタの構造及び作製方法について、図15乃至図17を用いて説明する。本実施の形態では、コプレナー型のトップゲートトランジスタ、及びスタガ型のデュアルゲートトランジスタを有する半導体装置について説明する。
本実施の形態では、先の実施の形態に示す半導体装置の一例として、記憶装置を示す。
本実施の形態では、半導体装置の一例である表示装置において、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、又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。先の実施の形態で説明した半導体装置を具備する電子機器の例について説明する。
Claims (11)
- 第1のトランジスタ及び第2のトランジスタを有し、
前記第1のトランジスタは、
第1の酸化物半導体膜と、
前記第1の酸化物半導体膜の一部と重畳する第1のゲート電極と、
前記第1の酸化物半導体膜及び前記第1のゲート電極の間に設けられるゲート絶縁膜と、
前記第1の酸化物半導体膜に接する一対の第1の電極と、
を有し、
前記第2のトランジスタは、
第2の酸化物半導体膜と、
前記第2の酸化物半導体膜の一部と重畳する第2のゲート電極と、
前記第2の酸化物半導体膜及び前記第2のゲート電極の間に設けられる前記ゲート絶縁膜と、
前記第2の酸化物半導体膜に接する一対の第2の電極と、
を有し、
前記第1の酸化物半導体膜において、前記第1のゲート電極と重畳する第1の領域と、
前記第2の酸化物半導体膜において、前記第2のゲート電極と重畳する第1の領域との酸素濃度が異なることを特徴とする半導体装置。 - 請求項1において、
前記第1のトランジスタのしきい値電圧が前記第2のトランジスタのしきい値電圧より低いことを特徴とする半導体装置。 - 請求項1または請求項2において、
前記第1の酸化物半導体膜及び前記第2の酸化物半導体膜と、前記第1のゲート電極及び前記第2のゲート電極の間に、前記一対の第1の電極及び前記一対の第2の電極を有することを特徴とする半導体装置。 - 請求項1または請求項2において、
前記第1のゲート電極及び前記第2のゲート電極を覆う絶縁膜を有し、
前記ゲート絶縁膜及び前記絶縁膜に設けられた開口部において、前記一対の第1の電極及び前記一対の第2の電極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のいずれか一項において、
前記第1の酸化物半導体膜は、前記第1のゲート電極と重畳する第1の領域と、前記第1の領域を挟む一対の第2の領域とを有し、
前記第2の酸化物半導体膜は、前記第2のゲート電極と重畳する第1の領域と、前記第1の領域を挟む一対の第2の領域とを有し、
前記第1の酸化物半導体膜における前記一対の第2の領域と、前記第2の酸化物半導体膜における前記一対の第2の領域とは、ドーパントを含むことを特徴とする半導体装置。 - 請求項1乃至請求項4のいずれか一項において、
前記第1の酸化物半導体膜の一部は、前記一対の第1の電極と接し、
前記第2の酸化物半導体膜の一部は、前記一対の第2の電極と接し、
前記第1の酸化物半導体膜は、第1のゲート電極と重畳する第1の領域と、前記第1の領域を挟む一対の第2の領域と、前記一対の第1の電極と接し、且つ前記一対の第2の領域を挟む一対の第3の領域とを有し、
前記第2の酸化物半導体膜は、前記第2のゲート電極と重畳する第1の領域と、前記第1の領域を挟む一対の第2の領域と、前記一対の第2の電極と接し、且つ前記一対の第2の領域を挟む一対の第3の領域とを有し、
前記第1の酸化物半導体膜における前記一対の第2の領域及び前記一対の第3の領域と、前記第2の酸化物半導体膜における前記一対の第2の領域及び前記一対の第3の領域とは、ドーパントを含むことを特徴とする半導体装置。 - 請求項5または請求項6において、
前記ドーパントは、ホウ素、窒素、リン、及びヒ素の少なくとも一以上であることを特徴とする半導体装置。 - 請求項5乃至請求項7のいずれか一項において、
前記ドーパントは、ヘリウム、ネオン、アルゴン、クリプトン、及びキセノンの少なくとも一以上であることを特徴とする半導体装置。 - 請求項5乃至請求項8のいずれか一項において、
前記ドーパントは、フッ素であることを特徴とする半導体装置。 - 請求項5乃至請求項9のいずれか一項において、
前記一対の第2の領域または前記一対の第3の領域には、前記ドーパントの一が、5×1018atoms/cm3以上1×1022atoms/cm3以下含まれていることを特徴とする半導体装置。 - 請求項5乃至請求項10のいずれか一項において、
前記第1の酸化物半導体膜及び前記第2の酸化物半導体膜が、In、Ga、SnおよびZnから選ばれた一種以上の元素を含むことを特徴とする半導体装置。
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Also Published As
Publication number | Publication date |
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US8643008B2 (en) | 2014-02-04 |
US20130020569A1 (en) | 2013-01-24 |
KR101424870B1 (ko) | 2014-07-31 |
KR20140059770A (ko) | 2014-05-16 |
JP6363162B2 (ja) | 2018-07-25 |
JP2017069576A (ja) | 2017-04-06 |
KR20130012055A (ko) | 2013-01-31 |
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