JP5502095B2 - 高歩留まりナノインプリント・リソグラフィ・テンプレートの製造 - Google Patents
高歩留まりナノインプリント・リソグラフィ・テンプレートの製造 Download PDFInfo
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- 238000001127 nanoimprint lithography Methods 0.000 title description 12
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0002—Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0017—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor for the production of embossing, cutting or similar devices; for the production of casting means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249978—Voids specified as micro
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/268—Monolayer with structurally defined element
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- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
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Description
Rp=R1+R2 (2)
SiH4(g) +2N2O(g) → SiO2(s)+2N2(g)+2H2(g)
テトラエチルオルトシリケート(TEOS)、テトラメチルシラン(TMS)、ヘキサメチルジシラザン(HMDS)などの有機ケイ素材料をPECVDで使用してSiOx 膜を形成してもよい。
図16を参照すると、テンプレート100は、基層102、エッチング停止層104および最上層106を含む。エッチング停止層104と最上層106は、特定の物理的特性(例えば、屈折率)が異なり、その結果、エッチング停止層と最上層の境界108は、最上層のエッチングまたは化学機械平坦化(CMP)を含むナノインプリント・リソグラフィ製造工程における基準点として使用することができる。また、エッチング停止層104と最上層106はまた、特定の化学的特性(例えば、既知のエッチング処理との反応性)が異なる。
場合によっては、インプリント・リソグラフィ・テンプレートの基層または中間層のある領域が、マーカー膜で被覆されてもよい。図17Aは、基層102、最上層106、および基層と最上層の間の境界に形成されたマーカー領域107を有するインプリント・リソグラフィ・テンプレート100を示す。マーカー領域107は、基層102の小さい部分(例えば、約1cm2 未満)を覆ってもよい。マーカー領域107の厚さは、最上層の上側面の平坦さがマーカー領域の存在によって実質的に影響を受けないように約2nm〜約30nmでよい。場合によって、最上層106は、テンプレート上にフィーチャがパターニングされエッチングされる前に、滑らかで平坦に研磨されてもよい(例えば、化学機械的平坦化により)。マーカー領域107の厚さを基準として最上層106のエッチングの深さを決定してもよい。マーカー領域107を形成するために使用される材料には、例えば、金属、金属酸化物または金属窒化物がある。
本明細書で述べる実施形態では、テンプレート層(例えば、キャップ層、中間層)は、化学機械的平坦化(CMP)を受けてもよい。CMPは、化学的手段と機械的手段の両方を使用することにより基板の片面または両面を同時に研磨することを含む。インプリント・リソグラフィ・テンプレートは、キャリア・ハウジング内に保持される。研磨パッド上にスラリが分注される。テンプレートが、回転され振動され(偏心運動)、回転研磨パッドと接触される。パッドに対する基板の力が制御される。スラリは、表面と反応し(CMPの化学的態様)かつ表面を物理的にこする(CMPの機械的態様)。研磨された材料は、研磨パッドによって取り去られる。
例1。低温PECVD SiOxの強化拡散性能が、インプリント試験によって示された。インプリント充填試験の試料は、公称厚さ375μmを有する両面研磨(DSP)3インチ・シリコン・ウェハ上に、多孔質酸化ケイ素をPECVD(PlasmaTherm 790 RIE/PECVD)によって200℃で厚さ5μmに付着させることによって生成された。Si供給源は、21.2sccmの流量のSiH4であった。酸化剤は、42sccmの流量のN2Oであった。蒸着全圧力は300mTorr、高周波電力は50Wであった。ウェハは、蒸着用チャック上に直接配置された。次に、ウェハは、60nmのTranSpin(Molecular Imprints, Inc., Austin, TXから入手可能)が回転塗布された。対照として、3インチDSPシリコン・ウェハに60nmのTranSpinが被覆された。65mmの溶融シリカ芯無し(core-out)テンプレートを使用して、340μmの液滴中心間距離を有する格子液滴パターンを使用して約90nmの残余層厚を有するインプリントを生成した。ヘリウムは、パージ・ガスとして使用された。
61,63,106 キャップ層; 62,102 基層;
64,103 多孔質層; 104 エッチング停止層。
Claims (21)
- インプリント・リソグラフィ・テンプレート(18,100)であって、
少なくとも約0.4nmの平均孔径を有する多数の孔を画定する多孔質材料を含み、
前記多孔質材料が、ケイ素と酸素を含み、
前記多孔質材料の屈折率が、約1.4〜約1.5であり、
溶融シリカを基準にした多孔質材料の相対密度(ρporousG/ρfusede silica)に対するヤング率(E,GPa)の比率が、少なくとも約10:1である、インプリント・リソグラフィ・テンプレート。 - 前記多孔質材料の前記ヤング率が、少なくとも約5GPa、少なくとも約10GPa、または少なくとも約20GPaである、請求項1に記載のインプリント・リソグラフィ・テンプレート。
- 前記溶融シリカを基準にした前記多孔質材料の前記相対密度が、少なくとも約50%または少なくとも約65%である、請求項1または2に記載のインプリント・リソグラフィ・テンプレート。
- 前記多孔質材料が、SiOxを含み、1≦x≦2.5である、請求項1〜3のいずれか1項に記載のインプリント・リソグラフィ・テンプレート。
- 前記孔が、相互接続された、請求項1〜4のいずれか1項に記載のインプリント・リソグラフィ・テンプレート。
- 前記テンプレートが、さらに、基層(62,102)を含み、前記多孔質材料が、前記基層とキャップ層(61,63,106)の間に中間層(64,103)を形成する、請求項1〜5のいずれか1項に記載のインプリント・リソグラフィ・テンプレート。
- 前記多孔質材料の応力が、圧縮力を無効にする、請求項6に記載のインプリント・リソグラフィ・テンプレート。
- 前記多孔質材料が、不均一な多孔率勾配を有する、請求項6または7に記載のインプリント・リソグラフィ・テンプレート。
- 前記キャップ層(61,63,105)に付着された封止層(59)をさらに含み、前記封止層が、前記封止層と接するヘリウム・ガスを透過し、かつヘリウムより大きい化学種を実質的に透過しない、請求項6〜8のいずれか1項に記載のインプリント・リソグラフィ・テンプレート。
- 前記封止層が、前記多孔質層(64,103)と前記キャップ層(61,63,106)の間に位置決めされた、請求項9に記載のインプリント・リソグラフィ・テンプレート。
- 前記封止層(59)の厚さが、約10nm未満、約5nm未満、約3nm未満、または約1nm未満である、請求項9または10に記載のインプリント・リソグラフィ・テンプレート。
- インプリント・リソグラフィ・テンプレート(18,100)を形成する方法であって、
前記インプリント・リソグラフィ・テンプレート(18,103)の表面に、少なくとも約0.4nmの平均孔径を有する多数の孔を画定する多孔質層(64,103)を形成する段階を含み、
前記多孔質材料が、酸素とシリコンを含み、
前記多孔質材料の屈折率が、約1.4〜約1.5であり、
溶融シリカを基準にした多孔質材料の相対密度(ρporousG/ρfusede silica)に対するヤング率(E,GPa)の比率が、少なくとも約10:1である、インプリント・リソグラフィ・テンプレートを形成する方法。 - 前記多孔質層(64,103)上に第2層(59,63,105)を形成する段階をさらに含む、請求項12に記載の方法。
- 前記多孔質層(64,103)をエッチングする段階をさらに含む、請求項12または13に記載の方法。
- 前記多孔質層(64,103)を形成する段階が、蒸着工程を含む、請求項12〜14のいずれか1項に記載の方法。
- 前記インプリント・リソグラフィ・テンプレート(18,100)の表面と前記多孔質層(64,103)との間にエッチング停止層(104)を形成する段階をさらに含む、請求項12〜15のいずれか1項に記載の方法。
- 前記多孔質層(64,103)の表面に封止層(59)を形成する段階をさらに含む、請求項12〜16のいずれか1項に記載の方法。
- 前記封止層(59)の表面にキャップ層(61,63,106)を形成する段階をさらに含む、請求項17に記載の方法。
- 前記インプリント・リソグラフィ・テンプレート(18,100)の表面と前記多孔質層(64,103)との間にマーカー領域(107)を形成する段階をさらに含む、請求項12〜18のいずれか1項に記載の方法。
- 前記多孔質層(64,103)の化学機械的平坦化をさらに含む、請求項12〜19のいずれか1項に記載の方法。
- 前記多孔質層(64,103)の多孔率が、不均一である、請求項12〜20のいずれか1項に記載の方法。
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2009
- 2009-10-22 US US12/604,094 patent/US20100104852A1/en not_active Abandoned
- 2009-10-23 TW TW98135932A patent/TWI402160B/zh active
- 2009-10-23 JP JP2011533182A patent/JP5502095B2/ja active Active
- 2009-10-23 WO PCT/US2009/005775 patent/WO2010047821A1/en active Application Filing
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JP2012507140A (ja) | 2012-03-22 |
TW201024077A (en) | 2010-07-01 |
US20100104852A1 (en) | 2010-04-29 |
TWI402160B (zh) | 2013-07-21 |
WO2010047821A1 (en) | 2010-04-29 |
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