JP5470687B2 - シリコン化合物、紫外線吸収体、多層配線装置の製造方法および多層配線装置 - Google Patents
シリコン化合物、紫外線吸収体、多層配線装置の製造方法および多層配線装置 Download PDFInfo
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- JP5470687B2 JP5470687B2 JP2007209505A JP2007209505A JP5470687B2 JP 5470687 B2 JP5470687 B2 JP 5470687B2 JP 2007209505 A JP2007209505 A JP 2007209505A JP 2007209505 A JP2007209505 A JP 2007209505A JP 5470687 B2 JP5470687 B2 JP 5470687B2
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Description
しかし、配線間隔が1μm以下ではデバイス速度への影響が大きくなり、特に今後0.1μm以下の配線間隔で回路を形成すると、配線間の寄生容量がデバイス速度に大きく影響を及ぼすようになってくる。
なお、式(1)において、ε(誘電率)とCの関係を式(4)に示す。
(Sは電極面積、ε0は真空の誘電率、εrは絶縁膜の誘電率、dは配線間隔。)
したがって、配線遅延を小さくするためには、絶縁膜の低誘電率化が有効な手段となる。
(1)本発明における実施例を図1〜8を用いて説明する。
図9に示す発光スペクトルを有する高圧水銀ランプ(UVL−7000H4−N、ウシオ電機)を用いて紫外線硬化を行った。なお、紫外線の照度、スペクトル分布は分光放射照度計(USR−40D,ウシオ電機)にて測定した。
本発明に係る置換シリコン化合物に代えて表1に示す非置換シリコン化合物を使用した以外は実施例1〜6と同様にした。
石英基板上に本発明に係るシリコン化合物の膜あるいは比較用の膜を成膜し真空紫外分光器(SGV−157、島津製作所)にて180〜350nmの紫外線吸収スペクトルを測定することで、本発明に係るシリコン化合物の膜については、180〜210nmの間にある紫外線ピークについての前記シリコン化合物の紫外線吸収率1と、210〜350nmの間にある紫外線ピークについての前記シリコン化合物の紫外線吸収率2との比が、(紫外線吸収率1)/(紫外線吸収率2)≧2.5であることを確認した。結果は表2に示されている。同様にして210nm以下の紫外線の吸収率も測定した。
下記式1で示されるR1及びR2がHであるポリカルボシランのR1もしくはR2をハロゲン化し、ベンジル基を含むGrignard試薬と反応させることにより当該非置換ポリカルボシランに比して210nm以下の紫外線の吸収率が高いベンジル基を有するポリカルボしランを作製することができる。
基板上方に多孔質絶縁膜前駆体層を形成し、
付記1〜3のいずれかに記載の非置換シリコン化合物に比して210nm以下の紫外線の吸収率が高いシリコン化合物層を形成し、
当該シリコン化合物層を介して当該多孔質絶縁膜前駆体に紫外線を照射する
ことを含む、多層配線装置の製造方法。
付記1〜3のいずれかに記載の非置換シリコン化合物に比して210nm以下の紫外線の吸収率が高いシリコン化合物層を形成し、
当該シリコン化合物層を介して当該多孔質絶縁膜前駆体に紫外線を照射する
ことを含む、多層配線装置の製造方法。
14 素子領域 16 ゲート絶縁膜
18 ゲート電極 20 サイドウォール絶縁膜
22 ソース/ドレイン拡散層 24 トランジスタ
26 層間絶縁膜 28 ストッパ膜
30 コンタクトホール 32 密着層
34 導体プラグ 36 層間絶縁膜
38 多孔質層間絶縁膜 40 層間絶縁膜
42 フォトレジスト膜 44 開口部
46 溝 48 積層膜
50 Cu膜 52 層間絶縁膜
54 多孔質層間絶縁膜 56 層間絶縁膜
58 多孔質層間絶縁膜 60 層間絶縁膜
62 フォトレジスト膜 64 開口部
66 コンタクトホール 68 フォトレジスト膜
70 開口部 72 溝
74 積層膜 76a 配線
76b 導体プラグ
Claims (9)
- 非置換シリコン化合物に比して210nm以下の紫外線の吸収率が高い、当該非置換シリコン化合物を置換基で置換した、置換シリコン化合物を含んでなるフィルターにおいて、
下記式1で示されるポリカルボシランまたは下記式2で示されるポリシラザンまたはそれらの混合物からなるシリコン化合物のR1〜R3の少なくとも一部が他の基で置換された構造を有し、当該非置換シリコン化合物に比して210nm以下の紫外線の吸収率が高い、前記置換シリコン化合物
を含んでなるフィルター。
(式1において、R1、R2は、互いに同一もしくは異なっていてもよく、それぞれ、水素原子を表すか、もしくは置換もしくは非置換の、アルキル基、アルケニル基、シクロアルキル基またはアリール基を表し、nは10〜1000である。また、式2において、R1、R2およびR3は、互いに同一もしくは異なっていてもよく、それぞれ、水素原子を表すかもしくは置換もしくは非置換の、アルキル基、アルケニル基、シクロアルキル基またはアリール基を表し、但し、置換基R1、R2およびR3のうちの少なくとも1個は水素原子であり、そしてnは、当該シラザン型重合体が100〜50,000の数平均分子量を有するのに必要な繰り返し単位の数である。なお、式1と式2との記号は互いに独立している。) - 180〜210nmの間にある紫外線ピークについての前記置換シリコン化合物の紫外線吸収率1と、210〜350nmの間にある紫外線ピークについての前記置換シリコン化合物の紫外線吸収率2との比が、(紫外線吸収率1)/(紫外線吸収率2)≧2.5である、請求項1に記載のフィルター。
- 前記他の基が、ベンジル基、カルボニル基、カルボキシル基、アクロイル基、ジアゾ基、アジド基、シンナモイル基、アクリレート基、シンナミリデン基、シアノシンナミリデン基、フリルペンタジエン基、p−フェニレンジアクリレート基からなる群から選ばれたものである、請求項1または2に記載のフィルター。
- 多層配線装置の製造方法において、
基板上に多孔質絶縁膜前駆体の層を形成し、
請求項1〜3のいずれかに記載の置換シリコン化合物を含んでなるフィルターの層を形成し、
必要に応じて当該フィルターの層をプリキュアし、
次に、下記のいずれかの処理を行うことを含む、多層配線装置の製造方法。
(1)フィルターの層をプリキュアし、次いで、当該プリキュア層を介して当該多孔質絶縁膜前駆体に紫外線を照射する。
(2)フィルターの層をプリキュアせずに、当該フィルターの層を介して当該多孔質絶縁膜前駆体に紫外線を照射する。 - 前記多孔質絶縁膜前駆体が塗布型のシリカクラスター前駆体を用いて形成される、請求項4に記載の製造方法。
- 前記紫外線の光源が200〜800nmの範囲の波長を有する光源である、請求項4または5に記載の製造方法。
- 前記紫外線照射において、分光放射照度計を使用した場合における、ウエハ面における254nmの紫外線照度が1mW/cm2以上である、請求項4〜6のいずれかに記載の製造方法。
- 前記紫外線照射において、50〜470℃の間の温度で加熱しつつ紫外線を照射する、請求項4〜7のいずれか1項に記載の製造方法。
- 請求項4〜8のいずれか1項に記載の製造方法を用いて作製された多層配線装置。
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JP2007209505A JP5470687B2 (ja) | 2007-08-10 | 2007-08-10 | シリコン化合物、紫外線吸収体、多層配線装置の製造方法および多層配線装置 |
EP08161631.0A EP2028215B1 (en) | 2007-08-10 | 2008-08-01 | Silicon compound, ultraviolet absorbent, method for manufacturing multilayer wiring device and multilayer wiring device |
US12/185,367 US8207059B2 (en) | 2007-08-10 | 2008-08-04 | Silicon compound, ultraviolet absorbent, method for manufacturing multilayer wiring device and multilayer wiring device |
KR1020080076965A KR101053960B1 (ko) | 2007-08-10 | 2008-08-06 | 실리콘 화합물, 자외선 흡수체, 다층 배선 장치의 제조방법 및 다층 배선 장치 |
CN2008101297310A CN101649053B (zh) | 2007-08-10 | 2008-08-11 | 硅化合物、多层布线装置及其制造方法 |
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US20090038833A1 (en) | 2009-02-12 |
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