JP7575953B2 - 有機材料上に金属酸化物膜を堆積するための堆積ツールおよび方法 - Google Patents
有機材料上に金属酸化物膜を堆積するための堆積ツールおよび方法 Download PDFInfo
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- JP7575953B2 JP7575953B2 JP2020572887A JP2020572887A JP7575953B2 JP 7575953 B2 JP7575953 B2 JP 7575953B2 JP 2020572887 A JP2020572887 A JP 2020572887A JP 2020572887 A JP2020572887 A JP 2020572887A JP 7575953 B2 JP7575953 B2 JP 7575953B2
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- H10P76/40—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography of masks comprising inorganic materials
- H10P76/408—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography of masks comprising inorganic materials characterised by their sizes, orientations, dispositions, behaviours or shapes
- H10P76/4085—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography of masks comprising inorganic materials characterised by their sizes, orientations, dispositions, behaviours or shapes characterised by the processes involved to create the masks
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- C23C16/45525—Atomic layer deposition [ALD]
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Description
本願は、2018年6月26日出願の米国仮出願第62/690,210号、および、2018年8月1日出願の米国仮出願第16/052,286号に基づく優先権の利益を主張し、これらの仮出願は両方とも、すべての目的に対して参照によって本明細書に組み込まれる。
(1)ALDサイクルの第1ハーフ(前半)において、第1前駆体が、シャワーヘッド14を介して処理チャンバ12に導入される。第1前駆体は、基板18と反応して、表面上に第1粒子の第1層を堆積する。次いで、処理チャンバ12は、パージされる。
(2)ALDサイクルの第2ハーフ(後半)において、第2前駆体が、処理チャンバに導入される。第2前駆体も、基板18と反応して、表面上に第2粒子の第2層を形成する。
(1)基板上の有機フォトレジスト層上に金属酸化物層を堆積するために、スズを含む高反応性の有機金属前駆体を用いる第1ハーフサイクル、および、
(2)酸素(O2)種を含む第2ハーフサイクル。しかしながら、酸素種の副次的な影響により、有機フォトレジストを分解する。
非排他的実施形態において、有機金属前駆体を用いて、炭素などの有機フォトレジスト上へ酸化スズ(SnO2)などの金属酸化物層を堆積するためのALDサイクルの第1ハーフサイクルおよび第2ハーフサイクルの例のための処理パラメータを、以下に提供する。
有機層上に金属酸化物を堆積できることで、(1)含まれる層の数と、(2)必要なリソグラフィ-エッチングサイクルの回数とを削減することによって、マルチパターニングを大幅に改善および単純化する機会が生まれる。これらの利点は、以前には上述したように不均一性の問題によって適していなかった金属酸化物から形成されたスペーサを導入または形成することによって実現される。
図4を参照すると、本発明の非排他的実施形態に従ったシステムコントローラ22のブロック図が示されている。システムコントローラ22は、堆積中、堆積後、および/または、その他の処理動作中に、ALD(またはPEALD)ツール10の動作全体を一般に制御し、処理条件を管理するために用いられる。
適用例1:
原子層堆積(ALD)ツールであって、有機金属前駆体を用いて基板上の有機フォトレジストの上に金属酸化物層を堆積するよう構成されている、ALDツール。
適用例2:
適用例1のALDツールであって、前記金属酸化物層は、1回または複数回のALDサイクル中に前記有機フォトレジストの上に堆積され、各ALDサイクルは、
前記基板上の前記有機フォトレジストの上に前記金属酸化物層を堆積するために前記有機金属前駆体を用いる第1ハーフサイクルと、
前記有機フォトレジストを分解する酸素種を含む第2ハーフサイクルと、
を備える、ALDツール。
適用例3:
適用例2のALDツールであって、前記有機金属前駆体は、3回以内の前記ALDサイクルで前記堆積された金属酸化物層によって前記有機フォトレジストをシールするのに十分な反応性を有する、ALDツール。
適用例4:
適用例2のALDツールであって、前記金属酸化物層は、ALDサイクル当たり1.0オングストローム以上の速度で堆積される、ALDツール。
適用例5:
適用例1のALDツールであって、前記有機金属前駆体は、金属有機スズ前駆体である、ALDツール。
適用例6:
適用例1のALDツールであって、前記有機金属前駆体は、アミノ10タイプの前駆体である、ALDツール。
適用例7:
適用例6のALDツールであって、前記アミノ10タイプの前駆体は、
(a)ジメチルアミノジメチルスズ(Me 2 Sn(NMe 2 ) 2 、
(b)ジメチルアミノトリメチルスズ(Me 3 Sn(MMe 2 )、
(c)テトラキス(ジメチルアミノ)スズ(Sn(Nme 2 ) 4 、
(d)テトラキス(ジエチルアミノ)スズ(Sn(Net 2 )) 4 、または、
(e)その他のアミノ金属有機スズ前駆体、
を含む群から選択される、ALDツール。
適用例8:
適用例1のALDツールであって、前記有機金属前駆体は、メトキシタイプの前駆体である、ALDツール。
適用例9:
適用例8のALDツールであって、前記メトキシタイプの前駆体は、
(a)ジブチルジメトキシスズ(Bu 2 Sn(OMe) 2 )、または、
(b)任意のメトキシまたはエトキシスズ前駆体、
を含む群から選択される、ALDツール。
適用例10:
適用例1のALDツールであって、前記有機フォトレジストは、炭素フォトレジストである、ALDツール。
適用例11:
適用例1のALDツールであって、前記有機フォトレジストは、ポリマフォトレジストである、ALDツール。
適用例12:
適用例1のALDツールであって、前記有機フォトレジストは、炭素マスク膜である、ALDツール。
適用例13:
適用例1のALDツールであって、前記有機フォトレジストは、反射防止層(ARL)である、ALDツール。
適用例14:
適用例1のALDツールであって、前記金属酸化物層は、酸化スズ(SnO 2 )であり、前記有機フォトレジストは、炭素フォトレジストである、ALD。
適用例15:
適用例1のALDツールであって、前記金属酸化物層は、酸化スズ(SnO 2 )であり、前記有機フォトレジストは、炭素反射防止層(ARL)である、ALD。
適用例16:
適用例2のALDツールであって、さらに、
処理チャンバと、
前記処理チャンバ内で前記基板を支持するための基板ペデスタルと、
を備え、
前記1回または複数回のALDサイクルは、前記処理チャンバ内で実行される、ALDツール。
適用例17:
適用例16のALDツールであって、前記ALDツールは、前記処理チャンバ内でプラズマを生成するためのRF源を備えたプラズマ強化ALDツール(PEALD)である、ALDツール。
適用例18:
適用例1のALDツールであって、前記堆積された金属酸化物層は、マルチパターニング処理フローの中で前記基板上にスペーサを形成するために用いられる、ALDツール。
適用例19:
基板に対して実行されるマルチパターニング方法であって、有機金属前駆体を用いて、前記基板上の有機フォトレジストの上に金属酸化物スペーサを形成する工程を備える、方法。
適用例20:
適用例19のマルチパターニング方法であって、前記金属酸化物スペーサを形成する工程は、さらに、
前記基板上にマンドレルを規定するために、フォトリソグラフィを用いて前記有機フォトレジストをパターニングする工程と、
前記基板上の前記マンドレルの上に金属酸化物の層を堆積する工程と、
前記金属酸化物の前記層の略水平面と、前記マンドレルとを前記基板から除去することにより、前記基板上に前記金属酸化物スペーサを形成する工程と、
を含む、方法。
適用例21:
適用例20のマルチパターニング方法であって、さらに、
前記基板上の前記金属酸化物スペーサの上に酸化シリコン(SiO 2 )層を形成する工程と、
前記酸化シリコン(SiO 2 )層の水平部分と、前記金属酸化物スペーサとを除去することにより、前記基板上にSiO 2 スペーサを形成する工程と、
を備える、方法。
適用例22:
適用例21のマルチパターニング方法であって、前記金属酸化物スペーサは、前記マンドレルよりも小さいピッチを有し、前記SiO 2 スペーサは、前記金属酸化物スペーサよりも小さいピッチを有する、方法。
適用例23:
適用例20のマルチパターニング方法であって、前記金属酸化物の層を堆積する工程は、さらに、3回以下の原子層堆積(ALD)サイクルを前記基板に実行する工程を備え、各ALDサイクルは、1.0オングストローム以上の厚さを有する金属酸化物膜をもたらす、方法。
適用例24:
適用例23のマルチパターニング方法であって、各ALDサイクルは、さらに、
第1ハーフサイクル中に、前記金属酸化物膜を堆積して、前記金属酸化物層を形成する工程と、
第2ハーフサイクル中に、前記基板を酸素種に暴露させる工程と、
を含み、
前記第1ハーフサイクル中に堆積された前記金属酸化物膜は、前記第2ハーフサイクル中に前記酸素種が前記マンドレルを分解することを防止するのに役立つ、方法。
適用例25:
適用例21のマルチパターニング方法であって、前記有機金属前駆体は、金属有機スズ前駆体である、方法。
適用例26:
適用例25のマルチパターニング方法であって、前記有機金属前駆体は、アミノ10タイプの前駆体である、方法。
適用例27:
適用例26のマルチパターニング方法であって、前記アミノ10タイプの前駆体は、
(a)ジメチルアミノジメチルスズ(Me 2 Sn(NMe 2 ) 2 、
(b)ジメチルアミノトリメチルスズ(Me 3 Sn(MMe 2 )、
(c)テトラキス(ジメチルアミノ)スズ Sn(Nme 2 ) 4 、
(d)テトラキス(ジエチルアミノ)スズ(Sn(Net 2 )4)、または、
(e)任意の金属有機アミノスズ前駆体、
を含む群から選択される、方法。
適用例28:
適用例21のマルチパターニング方法であって、前記有機金属前駆体は、メトキシタイプの前駆体である、方法。
適用例29:
適用例28のマルチパターニング方法であって、前記メトキシタイプの前駆体は、
(a)ジブチルジメトキシスズ(Bu 2 Sn(OMe) 2 )、
(b)任意のその他のメトキシまたはエトキシスズ前駆体、
を含む群から選択される、方法。
適用例30:
適用例21のマルチパターニング方法であって、前記有機フォトレジストは、
(a)炭素フォトレジスト、
(b)ポリマフォトレジスト、
(c)炭素マスク膜、または、
(d)炭素反射防止層(ARL)、
の内の1つである、方法。
適用例31:
適用例19のマルチパターニング方法であって、前記金属酸化物層は、酸化スズ(SnO 2 )であり、前記有機フォトレジストは、炭素フォトレジストである、方法。
適用例32:
適用例19のマルチパターニング方法であって、前記金属酸化物層は、酸化スズ(SnO 2 )であり、前記フォトレジストは、炭素反射防止層(ARL)である、方法。
適用例33:
適用例23のマルチパターニング方法であって、各ALDサイクルは、室温から125℃までの範囲の温度で実行される、方法。
適用例34:
適用例23のマルチパターニング方法であって、前記第1ハーフサイクル中に、前記金属酸化物膜を堆積する工程は、さらに、毎分0.1~0.5リットルの範囲の流量で、有機金属前駆体を処理チャンバ内に導入する工程を含む、方法。
適用例35:
適用例34のマルチパターニング方法であって、さらに、前記第1ハーフサイクルの継続時間を1.0~3.0秒の範囲で定める工程を含む、方法。
適用例36:
適用例1のALDツールであって、前記金属酸化物層は、
(a)酸化スズ、
(b)二酸化チタン、
(c)二酸化ハフニウム、
(d)二酸化ジルコニウム、または、
(e)酸化タンタル、
を含む群から選択される、ALDツール。
適用例37:
適用例19のマルチパターニング方法であって、前記金属酸化物スペーサは、
(a)酸化スズ、
(b)二酸化チタン、
(c)二酸化ハフニウム、
(d)二酸化ジルコニウム、または、
(e)酸化タンタル、
の内の1つを含む、方法。
Claims (8)
- 方法であって、
1回の原子層堆積(ALD)サイクルの前半中に、有機金属前駆体を用いて基板上の有機フォトレジストの上に金属層を堆積する工程と、
前記1回のALDサイクルの後半中に、前記金属層が前記有機フォトレジストの上に堆積された前記基板を酸素種に暴露させて、堆積された金属酸化物層を形成する工程と、を含み、
前記金属層の堆積と前記基板の暴露は、堆積された前記金属層が、3回以内の前記ALDサイクルにおいて前記酸素種による分解から前記有機フォトレジストをシールするように構成されており、
前記有機金属前駆体は、金属有機スズ前駆体である、方法。 - 請求項1に記載の方法であって、さらに、前記金属酸化物層をALDサイクル当たり1.0オングストローム以上の厚さで堆積する工程を含む、方法。
- 請求項1に記載の方法であって、前記有機金属前駆体は、アミノタイプの前駆体である、方法。
- 請求項3に記載の方法であって、前記アミノタイプの前駆体は、
(a)ジメチルアミノトリメチルスズ(Me3Sn(NMe2)、
(b)テトラキス(ジメチルアミノ)スズ(Sn(NMe2)4)、
(c)テトラキス(ジエチルアミノ)スズ(Sn(NEt2)4)、または、
(d)その他のアミノ金属有機スズ前駆体、
を含む群から選択される、方法。 - 請求項1に記載の方法であって、前記有機フォトレジストは、
(a)炭素フォトレジスト、
(b)ポリマフォトレジスト、
(c)炭素マスク膜、または、
(d)反射防止層(ARL)、
の内の1つである、方法。 - 請求項1に記載の方法であって、前記金属酸化物層は、酸化スズ(SnO2)であり、前記有機フォトレジストは、炭素フォトレジストまたは炭素反射防止層(ARL)のいずれかである、方法。
- 請求項1に記載の方法であって、さらに、
マルチパターニング処理フローの中で前記基板上にスペーサを形成するために前記堆積された金属酸化物層を用いる工程を含む、方法。 - 請求項1に記載の方法であって、
前記有機金属前駆体は、ジブチルジメトキシスズである、方法。
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| US201862690210P | 2018-06-26 | 2018-06-26 | |
| US62/690,210 | 2018-06-26 | ||
| US16/052,286 | 2018-08-01 | ||
| US16/052,286 US20190390341A1 (en) | 2018-06-26 | 2018-08-01 | Deposition tool and method for depositing metal oxide films on organic materials |
| PCT/US2019/035638 WO2020005487A1 (en) | 2018-06-26 | 2019-06-05 | Deposition tool and method for depositing metal oxide films on organic materials |
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| US11887846B2 (en) | 2024-01-30 |
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| CN112334598A (zh) | 2021-02-05 |
| TW202014545A (zh) | 2020-04-16 |
| SG11202013031PA (en) | 2021-01-28 |
| TWI835810B (zh) | 2024-03-21 |
| TW202434752A (zh) | 2024-09-01 |
| KR20210014202A (ko) | 2021-02-08 |
| US20190390341A1 (en) | 2019-12-26 |
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