JP6966150B2 - 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
ファラデーケージを用いたプラズマエッチング方法 Download PDFInfo
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- 238000001020 plasma etching Methods 0.000 title claims description 67
- 238000000034 method Methods 0.000 title claims description 40
- 238000005530 etching Methods 0.000 claims description 153
- 239000000463 material Substances 0.000 claims description 89
- 239000000758 substrate Substances 0.000 claims description 52
- 229910052751 metal Inorganic materials 0.000 claims description 50
- 239000002184 metal Substances 0.000 claims description 50
- 239000010453 quartz Substances 0.000 claims description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 43
- 238000000059 patterning Methods 0.000 claims description 24
- 230000009467 reduction Effects 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 12
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910001882 dioxygen Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 description 52
- 230000000052 comparative effect Effects 0.000 description 23
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000009616 inductively coupled plasma Methods 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
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- 239000010935 stainless steel Substances 0.000 description 5
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- 229920000642 polymer Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910021418 black silicon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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- 238000001723 curing Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
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- 239000003574 free electron Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910052646 quartz group Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
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- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
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- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
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- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
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Description
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設けた後、平面エッチングを行って、ファラデーケージ内の高エッチング領域を確認した。
メッシュ部の面抵抗が0.23Ω/□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設けた後、平面エッチングを行って、ファラデーケージ内の高エッチング領域を確認した。
厚さ2mmのガラス基材上にAlを蒸着してAl層を形成した。さらに、Al層上にフォトレジストをスピンコーティングした後、405nmのピッチを有するフォトマスクを用いてUV硬化でフォトレジストを現像した後、Al層を選択的にエッチングして、ガラス基材上にAl金属マスクを形成した。
ファラデーケージの底面を、SUS304プレートではないCuプレートを適用したことを除き、実施例1と同様の方法でガラス基材をエッチングした。
ファラデーケージの底面を、SUS304ではないAlプレートを適用したことを除き、実施例1と同様の方法でガラス基材をエッチングした。
ファラデーケージの底面を、SUS304ではないガラス(SiO2)を適用したことを除き、実施例1と同様の方法でガラス基材をエッチングした。
支持台の材質をテフロン(登録商標)高分子に変更したことを除けば、実施例1と同様の方法でガラス基材をエッチングした。
支持台の材質をCuに変更したことを除けば、実施例1と同様の方法でガラス基材をエッチングした。
支持台の材質をCuに変更し、ファラデーケージの底面をCuプレートで適用したことを除き、実施例1と同様の方法でガラス基材をエッチングした。
Claims (15)
- プラズマエッチング装置内に、メッシュ部が上面に備えられたファラデーケージを設けるステップと、
開口部を有する金属マスクが一面上に備えられた石英基材を前記ファラデーケージ内に設けるステップと、
プラズマエッチングを用いて前記石英基材をエッチングするパターニングステップとを含み、
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み、
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、ファラデーケージを用いたプラズマエッチング方法。 - 前記パターニングステップは、前記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、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。
- 前記パターニングステップは、前記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、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。
- 前記パターニングステップは、前記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供給するが、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、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。
- 前記メッシュ部は、0.5Ω/□以上の面抵抗を有する、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6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にサンプル基材を設け、平面プラズマエッチングを行って、前記ファラデーケージ内の前記底面に平行な面において高いエッチング率を示す高エッチング領域を確認するステップと、
傾斜面を有する支持台を用意し、前記傾斜面の下部領域を前記ファラデーケージの高エッチング領域に位置させる支持台整列ステップとをさらに含み、
前記石英基材を前記ファラデーケージ内に設けるステップは、前記支持台の傾斜面上に前記石英基材を設ける、請求項1から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。 - 前記パターニングステップにおけるエッチング率は、前記傾斜面の上部領域から下部領域へ減少後に反転して増加する、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。
- 前記パターニングステップは、前記石英基材の一側に第1傾斜パターン部および前記石英基材の他側に第2傾斜パターン部を同時に形成するものであり、
前記第1傾斜パターン部は、深さ勾配を有する傾斜溝パターンを含み、
前記第2傾斜パターン部は、0nm〜50nmの深さ偏差を有する傾斜溝パターンを含む、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。 - 前記傾斜面の最上部のエッチング速度と前記傾斜面の最下部のエッチング速度との差は、30%以内である、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。
- 前記第1傾斜パターン部は、エッチング率が反転して増加する前の領域、または前記エッチング率が反転した後に増加する領域で形成される、請求項10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。
- 前記支持台は、前記金属マスクの標準還元電位以上の標準還元電位を有する金属を含む、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。
- パターニングされた石英基材のエッチング部の底面は、針状構造物の高さが50nm以下に制御されたものである、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。
- パターニングされた前記石英基材は、回折格子導光板用モールド基材である、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。
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