JP7265570B2 - 強誘電体キャパシタ、強誘電体電界効果トランジスタ、並びに導電性材料及び強誘電体材料を含む電子部品の形成に用いられる方法 - Google Patents
強誘電体キャパシタ、強誘電体電界効果トランジスタ、並びに導電性材料及び強誘電体材料を含む電子部品の形成に用いられる方法 Download PDFInfo
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Description
幾つかの実施形態では、導電性材料及び強誘電体材料を含む電子部品を形成するのに用いられる方法は、基板の上に非強誘電性金属酸化物含有絶縁体材料を形成することを含む。少なくとも2つの異なる組成の非強誘電性金属酸化物を含む複合積層物は、基板の上に形成される。複合積層物は、少なくとも×102ジーメンス/cmの全体的な導電率を有する。複合積層物は、非強誘電性金属酸化物含有絶縁体材料を強誘電性にするために用いられる。導電性材料は、複合積層物及び絶縁体材料の上に形成される。
12 ベース基板
14 非強誘電性金属酸化物含有絶縁体材料
16 複合積層物
18、20、22、24 層
26 導電性材料
28 非強誘電性金属酸化物含有絶縁材料
30 強誘電性ゲート構造物
32 半導体チャネル
34 ソース/ドレイン領域
35 強誘電体電界効果トランジスタ
40 強誘電体キャパシタ
42 導電体材料
Claims (12)
- 間に半導体チャネルを有する一対のソース/ドレイン領域と、
ゲート構造物と、
を備える強誘電体電界効果トランジスタであって、
前記ゲート構造物は、
強誘電性ゲート絶縁体材料と、
導電性ゲート電極と、
基板の上面上の、少なくとも2種の異なる組成の非強誘電性金属酸化物を含む複合積層物であって、該複合積層物は、第1の層、第2の層、及び第3の層を含む3つ以上の個別の層を有し、前記第2の層は、前記第1及び第3の層と物理的に直接接触し、前記複合積層物に含まれる前記層のうちの少なくとも1つは、ScOx、Sc2O3 、YOx、Y2O3、MgOx、MgO、SrOx、SrO、NbOx、GdOx、MoOx、RuOx、LaOx、VxOy、IrOx、CrOx、ZnOx、PrOx、CeOx、SmOx、及びLuOx からなるグループの中から選択された金属酸化物を含む、複合積層物と、
を含む、強誘電体電界効果トランジスタ。 - 前記複合積層物は、ZrO x 、Ta x O y 、HfO x 、TiO x 、AlO x 、及びSiO2 のうちの1種以上を更に含む、請求項1に記載の強誘電体電界効果トランジスタ。
- 間に強誘電性金属酸化物材料を有する2つの導電性キャパシタ電極であって、前記強誘電性金属酸化物材料は、遷移金属酸化物、ジルコニウム、酸化ジルコニウム、ハフニウム、酸化ハフニウム、チタン酸ジルコン酸鉛、酸化タンタル、酸化ストロンチウム、酸化チタンストロンチウム、酸化チタン、及びチタン酸バリウムストロンチウムからなるグループのうちの1種以上を含み、かつ、その中にドーパントを有し得、該ドーパントは、シリコン、アルミニウム、ランタン、イットリウム、エルビウム、カルシウム、マグネシウム、ストロンチウム、ルテチウム、ジスプロシウム、ガドリニウム、プラセオジム、クロム、ニオブ、タンタル、ハフニウム、ジルコニウム、バナジウムマンガン、コバルト、ニッケル、炭素、及び任意のその他の希土類元素のうちの1種以上を含む、2つの導電性キャパシタ電極と、
前記導電性キャパシタ電極のうちの少なくとも一方と前記強誘電性金属酸化物材料との間の非強誘電性材料であって、該非強誘電性材料は、少なくとも3つの個別の層と、少なくとも2種の異なる非強誘電性金属酸化物組成物とを含み、該少なくとも2種の異なる非強誘電性金属酸化物組成物は、互いに物理的に直接接触し、かつ、ScOx、Sc2O3、MgOx、MgO、SrOx、SrO、GdOx、MoOx、RuOx、LaOx、VxOy、IrOx、CrOx、ZnOx、PrOx、SmOx、及びLuOxからなるグループの中から選択され、前記非強誘電性材料は、前記非強誘電性材料に近い方の前記導電性キャパシタ電極の導電率よりも低い全体的な導電率を有する、非強誘電性材料と、
を含む強誘電体キャパシタ。 - 前記導電性キャパシタ電極の各々は、個々に、IrOx、SrRuO3、RuOx、LSCO、TiSix、TaSix、RuSix、WNxSiy、Ru、TiAlN、TaN、WNx、TiSixNy、TaSixNy、RuSixNy、及びRuSixTiyNzからなるグループの中から選択された1種以上の材料を含む、請求項3に記載の強誘電体キャパシタ。
- 前記非強誘電性金属酸化物組成物は、TaxOy、YOx、CeOx、TiOx、AlOx、ZrOx、MgOx、HfOx、及びNbOxからなるグループの中から選択された少なくとも1種の組成物を更に含む、請求項3に記載の強誘電体キャパシタ。
- 前記少なくとも1種の組成物はNbOxである、請求項5に記載の強誘電体キャパシタ。
- 前記強誘電性金属酸化物材料は、ジルコニウム、酸化ジルコニウム、ハフニウム、酸化ハフニウム、チタン酸ジルコン酸鉛、酸化タンタル、酸化ストロンチウム、及び酸化チタンストロンチウムからなるグループのうちの1種以上を含む、請求項6に記載の強誘電体キャパシタ。
- 間に半導体チャネルを有する一対のソース/ドレイン領域と、
ゲート構造物と、
を備える強誘電体電界効果トランジスタであって、
前記ゲート構造物は、
ジルコニウム、酸化ジルコニウム、ハフニウム、酸化ハフニウム、チタン酸ジルコン酸鉛、酸化タンタル、酸化ストロンチウム、及び酸化チタンストロンチウムからなるグループのうちの1種以上を含む強誘電性ゲート絶縁体材料と、
導電性ゲート電極と、
少なくとも2種の非強誘電性金属酸化物組成物を含む少なくとも3つの個別の層を含む複合積層物であって、前記少なくとも2種の非強誘電性金属酸化物組成物は、互いに物理的に直接接触し、かつ、ScOx、Sc2O3、MgOx、MgO、SrOx、SrO、GdOx、MoOx、RuOx、LaOx、VxOy、IrOx、CrOx、ZnOx、PrOx、SmOx、及びLuOxからなるグループの中から選択され、前記複合積層物は、前記導電性ゲート電極の導電率よりも小さい全体的な導電率を有する、複合積層物と、
を含む、強誘電体電界効果トランジスタ。 - 前記強誘電性ゲート絶縁体材料は、前記複合積層物に直接対向している、請求項8に記載の強誘電体電界効果トランジスタ。
- 前記非強誘電性金属酸化物組成物は、TaxOy、YOx、CeOx、TiOx、AlOx、ZrOx、MgOx、HfOx、及びNbOxからなるグループの中から選択された少なくとも1種の組成物を更に含む、請求項8に記載の強誘電体電界効果トランジスタ。
- 前記少なくとも1種の組成物はNbOxである、請求項10に記載の強誘電体電界効果トランジスタ。
- 導電性材料及び強誘電体材料を含む電子部品の形成に用いられる方法であって、
基板上にあって且つ前記基板の上面に物理的に直接接触している複合積層物を形成することであって、前記複合積層物は、第1の非強誘電性金属酸化物と、該第1の非強誘電性金属酸化物上の第2の非強誘電性金属酸化物とを含む少なくとも3つの個別の層を含み、前記第1及び第2の非強誘電性金属酸化物は、互いに異なる組成であり、かつ、その各々が、個々に、TiOx、AlOx、Al2O3、ScOx、Sc2O3、ZrOx、YOx、Y2O3、MgOx、MgO、HfOx、SrOx、SrO、TaxOy、NbOx、GdOx、MoOx、RuOx、LaOx、VxOy、IrOx、CrOx、ZnOx、PrOx、CeOx、SmOx、及びLuOxからなるグループの中から選択される、ことと、
前記複合積層物の直接上に非強誘電性金属酸化物含有絶縁体材料を形成することであって、前記非強誘電性金属酸化物含有絶縁体材料は、その最初の形成時に強誘電性になり、かつ、イットリウム・ジルコニウム酸化物、ハフニウム・ジルコニウム酸化物、ハフニウム・シリコン酸化物、及びハフニウム・ジルコニウム・シリコン酸化物からなるグループのうちの少なくとも1種を含む、ことと、
前記複合積層物及び前記絶縁体材料の上に導電性材料を形成することと、
を含む方法。
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US14/958,182 US9876018B2 (en) | 2015-12-03 | 2015-12-03 | Ferroelectric capacitor, ferroelectric field effect transistor, and method used in forming an electronic component comprising conductive material and ferroelectric material |
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EP (1) | EP3384532A4 (ja) |
JP (2) | JP6883038B2 (ja) |
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CN (2) | CN113644194B (ja) |
TW (1) | TWI600057B (ja) |
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JP2018536998A (ja) | 2018-12-13 |
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CN113644194B (zh) | 2024-11-29 |
US10748914B2 (en) | 2020-08-18 |
KR102208970B1 (ko) | 2021-01-29 |
US20170162587A1 (en) | 2017-06-08 |
US11856790B2 (en) | 2023-12-26 |
EP3384532A4 (en) | 2019-07-17 |
US11552086B2 (en) | 2023-01-10 |
JP2021073747A (ja) | 2021-05-13 |
CN108369956B (zh) | 2021-08-31 |
KR102415069B1 (ko) | 2022-06-30 |
US20200373314A1 (en) | 2020-11-26 |
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