JP2021509490A - ファラデーケージを用いたプラズマエッチング方法 - Google Patents
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Abstract
Description
前記第1パターン領域は、5mmあたり0nm〜40nmの深さ勾配を有する第1溝パターンを含み、前記第2パターン領域は、5mmあたり50nm〜300nmの深さ勾配を有する第2溝パターンを含むものである、ファラデーケージを用いたプラズマエッチング方法を提供する。
前記第1パターン領域は、5mmあたり0nm〜40nmの深さ勾配を有する第1溝パターンを含み、前記第2パターン領域は、5mmあたり50nm〜300nmの深さ勾配を有する第2溝パターンを含むものである、ファラデーケージを用いたプラズマエッチング方法を提供する。
以下、本発明を具体的に説明するために実施例を挙げて詳細に説明する。しかし、本発明に係る実施例は種々の異なる形態に変形可能であり、本発明の範囲が以下に述べる実施例に限定されると解釈されない。本明細書の実施例は、当業界における平均的な知識を有する者に本発明をより完全に説明するために提供されるものである。
メッシュ部の面抵抗が0.5605Ω/□であり、底面がステンレス(SUS304)プレートであるファラデーケージを用意した。そして、誘導結合プラズマ反応性イオンエッチング装置(ICP−RIE)(Oxford社のplasmaLab system100)内に前記ファラデーケージを備えた。
参考例1と同様の誘導結合プラズマ反応性イオンエッチング装置およびファラデーケージを用いるものの、ファラデーケージのメッシュ部の半分の領域をシャッタを用いて遮蔽した。そして、ファラデーケージ内に平面のAl材質の支持台を設け、参考例1と同様の方法で製造されたAl金属マスクが備えられたガラス基材を前記支持台上に備えた。この時、ガラス基材とメッシュ部との離隔距離は7mmであり、ガラス基材の半分の領域はシャッタで遮蔽されたメッシュ部内に位置するように位置を調整した。
ファラデーケージ内に40゜の傾斜を有するAl材質の支持台を設けた後、前記Al金属マスクが備えられたガラス基材を前記支持台上に備えたことを除き、参考例2と同様の方法でガラス基材をエッチングした。
参考例1と同様の方法でガラス基材に対してプラズマエッチングをして1次パターニングを実施した。さらに、メッシュ部の半分の領域をシャッタを用いて遮蔽し、1次パターニングされたガラス基材の35mm地点とシャッタ部の末端とが整列されるようにガラス基材を位置させた後、1次プラズマエッチングと同一の条件でプラズマエッチングをして2次パターニングを実施した。
傾斜面を有する支持台を用いず、ファラデーケージの底面にAl金属マスクが備えられたガラス基材を備え、ガラス基材とメッシュ部との離隔距離が40mmとなるように調節したことを除き、参考例1と同様の方法でガラス基材に対してプラズマエッチングをして1次パターニングを実施した。
Claims (16)
- メッシュ部が上面に備えられたファラデーケージ内に、開口パターン部を有する金属マスクが一面上に備えられたエッチング用基材を備えるステップと、
プラズマエッチングを用いて、前記エッチング用基材に第1パターン領域を形成する第1パターニングステップと、
前記メッシュ部の少なくとも一部をシャッタを用いて遮蔽した後、プラズマエッチングを用いて、前記エッチング用基材に第2パターン領域を形成する第2パターニングステップと、を含み、
前記第1パターン領域は、5mmあたり0nm〜40nmの深さ勾配を有する第1溝パターンを含み、
前記第2パターン領域は、5mmあたり50nm〜300nmの深さ勾配を有する第2溝パターンを含むものである、ファラデーケージを用いたプラズマエッチング方法。 - 前記シャッタは、前記メッシュ部の20%〜80%領域を遮蔽するものである、請求項1に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記第2パターニングステップは、前記第2パターン領域の深さ勾配が始まる領域と前記シャッタの末端部とが同一線上に位置するように、前記エッチング用基材を整列させることを含むものである、請求項1または2に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記第2パターニングステップは、前記第1パターニングステップにより形成された第1パターン領域の少なくとも一部を含む前記エッチング用基材の一領域をエッチングして前記第2パターン領域を形成するものである、請求項1から3のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記エッチング用基材は、傾斜面を有する支持台上に備えられ、
前記第1溝パターンおよび前記第2溝パターンは、傾斜溝パターンである、請求項1から4のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。 - 前記エッチング用基材は、前記メッシュ部と少なくとも7mmの隔離距離を維持するものである、請求項1から5のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記エッチング用基材は、石英基板またはシリコンウエハである、請求項1から6のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記メッシュ部は、0.5Ω/□以上の面抵抗を有するものである、請求項1かrくぁ7のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記メッシュ部は、金属メッシュ上にフッ化炭素ラジカルが吸着されたものである、請求項8に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記プラズマエッチングは、プラズマエッチング装置の出力を0.75kW以上4kW以下に調節することを含むものである、請求項1から9のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記プラズマエッチングは、プラズマエッチング装置に反応性ガスおよび酸素ガスを含む混合ガスを10sccm以上75sccm以下で供給することを含むものである、請求項1から10のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記混合ガスの総流量中の酸素ガス流量の含有量は、1%以上20%以下である、請求項11に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記ファラデーケージの底面は、前記金属マスクより低いイオン化傾向を有する金属を含むものである、請求項1から12のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記ファラデーケージの底面は、前記金属マスクの標準還元電位より1V以上高い金属を含むものである、請求項1から13のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
- 前記金属マスクは、アルミニウムおよびクロムのうちの少なくとも1種を含み、前記ファラデーケージの底面は、銅を含むものである、請求項1から14のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
- パターニングされた前記エッチング用基材は、回折格子導光板用モールド基材である、請求項1から15のいずれか一項に記載のファラデーケージを用いたプラズマエッチング方法。
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KR1020170179300A KR102273970B1 (ko) | 2017-12-26 | 2017-12-26 | 파라데이 상자를 이용한 플라즈마 식각 방법 |
PCT/KR2018/015930 WO2019132345A1 (ko) | 2017-12-26 | 2018-12-14 | 파라데이 상자를 이용한 플라즈마 식각 방법 |
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US11462393B2 (en) | 2022-10-04 |
EP3712927A4 (en) | 2020-11-25 |
US20200365379A1 (en) | 2020-11-19 |
CN111448642A (zh) | 2020-07-24 |
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EP3712927A1 (en) | 2020-09-23 |
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