JP6758575B2 - 感光性化学増幅レジスト化学物質およびプロセスを使用する方法および技術 - Google Patents
感光性化学増幅レジスト化学物質およびプロセスを使用する方法および技術 Download PDFInfo
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Materials For Photolithography (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Description
本出願は、2014年2月24日に出願された“Methods and Techniques to use with Photosensitized Chemically Amplified Resist Chemicals and Processes”という名称の米国仮特許出願第61/944,041号明細書の利益を主張し、その全体が参照により本明細書に援用される。
206 前記下層上にフォトレジスト層を堆積するステップであって、前記フォトレジスト層が、第1の光波長活性化閾値と第2の光波長活性化閾値とを含む、ステップ
208 パターン化マスクを通して第1の光波長を前記基板上に露光するステップ
210 第2の光波長を前記基板に露光するステップ
212 前記基板上の前記フォトレジスト層を現像するステップ
304 下層とフォトレジスト層とを含む基板を受け取るステップであって、前記フォトレジスト層が第1の光波長活性化閾値と第2の光波長活性化閾値とを含む、ステップ
306 前記フォトレジスト上に第1のトップコート層を堆積するステップ
308 パターン化マスクを通して第1の光波長範囲を前記基板上に露光するステップ(FIG.3Bのブロック310に続く)
310 (FIG.3Aのブロック308からの続き)前記第1のトップコート層を除去するステップ
312 第2の光波長を前記基板上に露光するステップ
Claims (10)
- 基板を処理する方法であって:
前記基板上に下層を含む前記基板を受け取るステップと;
前記下層上にフォトレジスト層を堆積するステップであって、前記フォトレジスト層が光増感剤発生化合物および光酸発生化合物を含む、ステップと;
パターン化マスクを通して第1の波長を有する光を前記基板上に露光して、光増感剤を生成するステップと;
フラッド露光により第2の波長を有する光を前記基板に露光して、前記光増感剤を励起するステップであって、前記第2の波長が前記第1の波長と異なる、ステップと;を含み、
前記第2の波長が300nmより大きい波長の光を含み、
前記下層が、炭素元素と、H、O、N、Br、SまたはIの少なくとも1種類以上の元素とを含む前記第2の波長の光を吸収する発色団を含み、前記発色団を含む発色団化合物の最大吸光度波長は250nm〜400nmであり、
前記フォトレジスト層は前記発色団を含む発色団化合物を含み、
前記フォトレジスト層と前記下層との界面における前記発色団化合物の濃度が、前記フォトレジスト層の残りの部分よりも高いか、または前記フォトレジスト層と前記下層との界面と反対側の前記フォトレジスト層の表面の近傍における前記発色団化合物の濃度が、前記フォトレジスト層の残りの部分よりもより高い、方法。 - 前記フォトレジスト層の屈折率が0.9〜1.7の間である、請求項1に記載の方法。
- 前記フォトレジスト層の厚さが30nm〜60nmの間である、請求項1に記載の方法。
- 前記光増感剤発生化合物が
アセトフェノン;
トリフェニレン;
ベンゾフェノン;
フルオレノン(flourenone);
アントラキノン;
フェナントレン;または
それらの誘導体;を含み、;
前記光酸発生化合物が、
トリフェニルスルホニウムトリフレート、トリフェニルスルホニウムノナフレート、パーフルオロオクチルスルホン酸トリフェニルスルホニウム、トリアリールスルホニウムトリフレート、トリアリールスルホニウムノナフレート、パーフルオロオクチルスルホン酸トリアリールスルホニウム、トリフェニルスルホニウム塩、トリアリールスルホニウム塩、ヘキサフルオロアンチモン酸トリアリールスルホニウム塩、N−ヒドロキシナフタルイミドトリフレート、1,1−ビス[p−クロロフェニル]−2,2,2−トリクロロエタン(DDT)、1,1−ビス[p−メトキシフェニル]−2,2,2−トリクロロエタン、1,2,5,6,9,10−ヘキサブロモシクロドデカン、1,10−ジブロモデカン、1,1−ビス[p−クロロフェニル]2,2−ジクロロエタン、4,4−ジクロロ−2−(トリクロロメチル)ベンズヒドロール、1,1−ビス(クロロフェニル)2−2,2−トリクロロエタノール、ヘキサクロロジメチルスルホン、2−クロロ−6−(トリクロロメチル)ピリジン、またはそれらの誘導体の少なくとも1つを含む、請求項1に記載の方法。 - 基板を処理する方法であって、
前記基板上に下層を堆積するステップと;
前記下層上にフォトレジスト層を堆積するステップであって、フォトレジストが光増感剤発生化合物および光酸発生化合物を含む、ステップと;
前記フォトレジスト上にEUVトップコート層を堆積するステップと;
パターン化マスクを通して第1の波長を有する光をEUVトップコートおよび前記フォトレジスト層上に露光して、光増感剤を生成するステップであって、前記光の第1の波長がEUVスペクトル中の波長を含む、ステップと;
第2の波長を有する光を前記フォトレジストに対して前記EUVトップコートおよび前記フォトレジスト層上に露光して、前記光増感剤を励起するステップであって、第2の露光が前記基板のブランケット露光であり、前記第2の波長が前記第1の波長と異なる、ステップと;
前記フォトレジスト層を現像するステップと;を含み、
前記第2の波長が300nmより大きい波長の光を含み、
前記下層が、炭素元素と、H、O、N、Br、SまたはIの少なくとも1種類以上の元素とを含む前記第2の波長の光を吸収する発色団を含み、前記発色団を含む発色団化合物の最大吸光度波長は250nm〜400nmであり、
前記フォトレジスト層は前記発色団を含む発色団化合物を含み、
前記フォトレジスト層と前記下層との界面における前記発色団化合物の濃度が、前記フォトレジスト層の残りの部分よりも高いか、または前記フォトレジスト層と前記下層との界面と反対側の前記フォトレジスト層の表面の近傍における前記発色団化合物の濃度が、前記フォトレジスト層の残りの部分よりも高い、方法。 - 前記第1の波長が30nm未満の大きさを含み、かつ前記第2の波長が30nm以上の大きさを含む、請求項5に記載の方法。
- 前記第1の波長を有する光の前記露光の後に、120秒以下にわたり前記基板を30℃〜90℃に加熱するステップをさらに含む、請求項5に記載の方法。
- 前記第2の波長を有する光の前記露光の後に、120秒以下にわたり前記基板を80℃〜130℃に加熱するステップをさらに含む、請求項7に記載の方法。
- 前記EUVトップコートが:
前記光の第1の波長の前記露光中の前記フォトレジスト層からのガス放出を減少させ、
光の第1の波長範囲の前記露光からの帯域外放射線による意図しない酸光分解の発生を軽減する、
ように構成される、請求項5に記載の方法。 - EUVトップコートが0.9〜1.1の屈折率を含む、請求項5に記載の方法。
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