JP7353200B2 - 成膜方法 - Google Patents
成膜方法 Download PDFInfo
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- JP7353200B2 JP7353200B2 JP2020019137A JP2020019137A JP7353200B2 JP 7353200 B2 JP7353200 B2 JP 7353200B2 JP 2020019137 A JP2020019137 A JP 2020019137A JP 2020019137 A JP2020019137 A JP 2020019137A JP 7353200 B2 JP7353200 B2 JP 7353200B2
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Description
図1は、実施形態に係る成膜方法の一例を示すフローチャートである。図2及び図3は、図1に示す各工程での基板の状態の一例を示す断面図である。図2(A)~図2(E)は、それぞれ、図1に示す工程S101~S105に対応する基板10の状態を示す。図3(A)~図3(D)は、図1に示す工程S104A~S104Cに対応する基板10の状態を示し、図2(C)に示す基板10から図2(D)に示す基板10への状態の変化の詳細を示している。
次に、本開示の一実施形態に係る成膜方法を実施するためのシステムについて説明する。
次に、酸化還元処理装置200、成膜装置400のような成膜装置、およびSAM形成装置300の一例について説明する。
11 導電膜
11A 自然酸化膜
12 絶縁膜
13 SAM
14 AlO膜
15 下地基板
Claims (15)
- 第1領域の表面に形成された第1の金属製の金属層と、第2領域の表面に形成された絶縁層とを有する基板を準備する工程と、
自己組織化膜の原料ガスを供給し、前記金属層の表面に自己組織化膜を形成する工程と、
前記自己組織化膜を形成した後に、第2の金属を含有する前駆体ガスの供給と、酸化ガスの供給とを複数回繰り返し、原子層堆積法により前記絶縁層の上に第2の金属の酸化膜を形成する工程と、
前記前駆体ガスの供給と、前記酸化ガスの供給とを繰り返し行う度に、前記酸化ガスの供給の後で前記前駆体ガスの供給の前に、還元ガスを供給して前記第1の金属の表面に形成された前記第1の金属の酸化膜を還元する工程と
を含む、成膜方法。 - 前記第1の金属の酸化膜を還元する工程は、前記前駆体ガスの供給と、前記酸化ガスの供給とを複数回繰り返したときに、前記酸化ガスの供給の後で前記前駆体ガスの供給の前に行う工程である、請求項1に記載の成膜方法。
- 前記自己組織化膜を形成する工程の前に、前記基板に還元ガスを供給して、前記第1の金属の表面に形成された、前記第1の金属の自然酸化膜を還元する工程をさらに含む、請求項1又は2に記載の成膜方法。
- 前記自然酸化膜を還元する工程の還元剤は、水素(H 2 )ガス、水素(H 2 )プラズマ、酸素を含む有機分子である請求項3に記載の成膜方法。
- 前記酸素を含む有機分子は、アルコールである請求項4に記載の成膜方法。
- 前記アルコールは、イソプロピルアルコール(IPA)である請求項5に記載の成膜方法。
- 前記第2の金属は、アルミニウム(Al)、ハフニウム(Hf)、又は、ジルコニウム(Zr)である、請求項1乃至6のいずれか1項に記載の成膜方法。
- 前記第2の金属はアルミニウム(Al)であり、前記前駆体ガスは、トリメチルアルミニウムである、請求項7に記載の成膜方法。
- 前記第2の金属はハフニウム(Hf)であり、前記前駆体ガスは、テトラキス(ジメチルアミノ)ハフニウム、テトラキス(ジエチルアミノ)ハフニウム、又は、テトラキス(エチルメチルアミノ)ハフニウムである、請求項7に記載の成膜方法。
- 前記第2の金属はジルコニウム(Zr)であり、前記前駆体ガスは、テトラキス(ジメチルアミノ)ジルコニウム、テトラキス(ジエチルアミノ)ジルコニウム、又は、テトラキス(エチルメチルアミノ)ジルコニウムである、請求項7に記載の成膜方法。
- 前記酸化ガスは、水蒸気(H2O)、過酸化水素(H2O2)、酸素(O2)、又はオゾン(O3)である、請求項1乃至10のいずれか一項に記載の成膜方法。
- 前記還元ガスは、アルコール、又は、水素(H2)である、請求項1乃至11のいずれか一項に記載の成膜方法。
- 前記還元ガスのアルコールは、イソプロピルアルコール(IPA)である、請求項12に記載の成膜方法。
- 前記自己組織化膜の原料ガスは、チオール系の自己組織化膜の原料ガスである、請求項1乃至13のいずれか一項に記載の成膜方法。
- 前記第2の金属の酸化膜を形成する工程の後に、前記金属層の表面から前記自己組織化膜を除去する工程をさらに含む、請求項1乃至14のいずれか一項に記載の成膜方法。
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