JPS63146038A - 感光性組成物 - Google Patents
感光性組成物Info
- Publication number
- JPS63146038A JPS63146038A JP29248786A JP29248786A JPS63146038A JP S63146038 A JPS63146038 A JP S63146038A JP 29248786 A JP29248786 A JP 29248786A JP 29248786 A JP29248786 A JP 29248786A JP S63146038 A JPS63146038 A JP S63146038A
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- JP
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- Prior art keywords
- group
- different
- same
- carbon atoms
- hydrogen atom
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/60—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which all the silicon atoms are connected by linkages other than oxygen atoms
-
- 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
- G03F7/004—Photosensitive materials
- G03F7/075—Silicon-containing compounds
- G03F7/0757—Macromolecular compounds containing Si-O, Si-C or Si-N bonds
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
め要約のデータは記録されません。
Description
【発明の詳細な説明】
[発明の目的]
(産業上の利用分野)
本発明は、感光性組成物に関する。
(従来の技術)′
IC等の半導体装置の製造工程では、フォトエツチング
による微細加工技術が採用されている。
による微細加工技術が採用されている。
この技術は、例えばシリコン単結晶ウェハ等の基板上に
フォトレジスト膜をスピンコーティング法等により形成
し、このレジスト膜に所望のパターンををするマスクを
用いて露光を行なった後、現像、リンス等の処理を施し
てレジスバターンを形成し、更に該レジストパターンを
エツチングマスクとして露出するウェハをエツチングす
ることにより微細幅の線や窓を開孔する方法である。か
かる微細加工技術において、半導体装置の精度は使用さ
れるフォトレジストの性能、例えば基板上での解像力、
光感応性の精度、基板との密着性又はエッチャントに対
する耐性等により左右される。
フォトレジスト膜をスピンコーティング法等により形成
し、このレジスト膜に所望のパターンををするマスクを
用いて露光を行なった後、現像、リンス等の処理を施し
てレジスバターンを形成し、更に該レジストパターンを
エツチングマスクとして露出するウェハをエツチングす
ることにより微細幅の線や窓を開孔する方法である。か
かる微細加工技術において、半導体装置の精度は使用さ
れるフォトレジストの性能、例えば基板上での解像力、
光感応性の精度、基板との密着性又はエッチャントに対
する耐性等により左右される。
゛ところで、上述したレジストパターンに用いられるフ
ォトレジストとしては、例えばポリシラン系重合体が注
目されている。かかるフォトレジストには、特開昭Go
−228542号公報に記載されたものがある。この発
明のポリシランは、化学線の照射により光解重合して揮
発性生成物を生成するため、この性質を利用してポジ型
パターン形成のフォトレジストとして使用することがで
きる。しかしながら、かかるドライ現像では微細なパタ
ーンを精度よく形成することがてきないという問題かあ
った。
ォトレジストとしては、例えばポリシラン系重合体が注
目されている。かかるフォトレジストには、特開昭Go
−228542号公報に記載されたものがある。この発
明のポリシランは、化学線の照射により光解重合して揮
発性生成物を生成するため、この性質を利用してポジ型
パターン形成のフォトレジストとして使用することがで
きる。しかしながら、かかるドライ現像では微細なパタ
ーンを精度よく形成することがてきないという問題かあ
った。
このような問題点を解決する方法の一つとして、アルカ
リ現像を行なう方法が考えられる。しかしながら、ポリ
シランやポリシロキサンはアルカリ溶液に不溶性である
め、アルカリ現像できないという問題があった。
リ現像を行なう方法が考えられる。しかしながら、ポリ
シランやポリシロキサンはアルカリ溶液に不溶性である
め、アルカリ現像できないという問題があった。
(発明が解決しようとする問題点)
本発明は、上記従来の問題点を解決するためになされた
もので、露光による光分解後においてアルカリ溶液に対
して良好に溶解され、微細なレジストパターンの形成が
可能なポリシラン系又はポリシロキサン系の重合体から
なる感光性組成物を提供しようとするものである。
もので、露光による光分解後においてアルカリ溶液に対
して良好に溶解され、微細なレジストパターンの形成が
可能なポリシラン系又はポリシロキサン系の重合体から
なる感光性組成物を提供しようとするものである。
[発明の構成]
(問題点を解決するための手段)
本発明は、下記一般式(1)又は(II)にて表わされ
る重合体からなることを特徴とするへ光性組成物。
る重合体からなることを特徴とするへ光性組成物。
R1撃2
■
但し、式中のR1−R4及びR14〜R1□は同一であ
っても、異なってもよく、夫々水素原子、炭素数1〜1
0の脂肪族基、炭素数6〜14の非置換もしくは置換芳
香族基、R5−R8は同一であっても、異なってもよく
、水素原子、水酸基、アルコキシ基、炭素数1〜10の
脂肪族基、炭素数6〜14の非置換もしくは置換芳香族
基、R9〜RI3i′j’−であっても、異なってもよ
く、夫々水素原子ハロゲン原子、炭素数1〜12のアル
キル基、炭素数1〜12のアルコキシ基、シアノ基、ニ
トロ基、ヒドロキシ基、mは正の整数、nは零を含む正
の整数を示す。
っても、異なってもよく、夫々水素原子、炭素数1〜1
0の脂肪族基、炭素数6〜14の非置換もしくは置換芳
香族基、R5−R8は同一であっても、異なってもよく
、水素原子、水酸基、アルコキシ基、炭素数1〜10の
脂肪族基、炭素数6〜14の非置換もしくは置換芳香族
基、R9〜RI3i′j’−であっても、異なってもよ
く、夫々水素原子ハロゲン原子、炭素数1〜12のアル
キル基、炭素数1〜12のアルコキシ基、シアノ基、ニ
トロ基、ヒドロキシ基、mは正の整数、nは零を含む正
の整数を示す。
上記一般式(1)又は(II)に導入されるベンジルエ
ーテルを、以下に具体的に例示する。
ーテルを、以下に具体的に例示する。
上記一般式(1)又は(II)にて表わされる構造単位
を、以下に具体的に例示する。
を、以下に具体的に例示する。
→S1← →S I +−+S I→−C
H2CH2Cll3 CH21(CC)13 CH3 +S 1÷−−(−3i÷ →S i +−+S
1→−CH2C6H11C)+2 CH2CH2 CH2C3H7CH2 →S1−0÷−÷Si −0← −+Si −
0÷−÷S1−0←CH−CH3CH−CH3 CII3 C113−
(−Si−0→−→S1−0← なお、本発明の感光性組成物は上記一般式(I)又は(
If)にて表わされる構造単位を有する重合体の他に、
ベンゾフェノン誘導体、アセトフェノン誘導体、アント
ラセン誘導体等の増感剤を配合して構成してもよい。
H2CH2Cll3 CH21(CC)13 CH3 +S 1÷−−(−3i÷ →S i +−+S
1→−CH2C6H11C)+2 CH2CH2 CH2C3H7CH2 →S1−0÷−÷Si −0← −+Si −
0÷−÷S1−0←CH−CH3CH−CH3 CII3 C113−
(−Si−0→−→S1−0← なお、本発明の感光性組成物は上記一般式(I)又は(
If)にて表わされる構造単位を有する重合体の他に、
ベンゾフェノン誘導体、アセトフェノン誘導体、アント
ラセン誘導体等の増感剤を配合して構成してもよい。
次に、本発明の感光性組成物によるレジストパターンの
形成工程を説明する。
形成工程を説明する。
まず、基板上に釘機溶媒により溶解させた下地用樹脂液
を回転塗布法やディピング法により塗布した後、乾燥し
て下地用樹脂膜を形成する。ここに用いる基板としては
、例えばシリコン単結晶ウェハ単体、表面に絶縁膜や導
電膜等の各種の被膜が堆積された同ウェハ又はマスクブ
ランク等を挙げることができる。前記下地用樹脂として
は、酸素ガスプラズマで除去が可能な樹脂が適切であり
、例えばノボラック樹脂、ポリイミド樹脂、ゴム系ネガ
型レジスト、ノボラック系ポジ型レジスト、ポリスチレ
ン、ポリメチルメタクリレート等を挙げることができる
。前記下地用樹脂の6機溶媒としては、格別限定されず
、例えばトルエン、キシレン、0−ジクロルベンゼン、
クロロホルム、jタノール、イソプロピルアルコール、
シクロベ。
を回転塗布法やディピング法により塗布した後、乾燥し
て下地用樹脂膜を形成する。ここに用いる基板としては
、例えばシリコン単結晶ウェハ単体、表面に絶縁膜や導
電膜等の各種の被膜が堆積された同ウェハ又はマスクブ
ランク等を挙げることができる。前記下地用樹脂として
は、酸素ガスプラズマで除去が可能な樹脂が適切であり
、例えばノボラック樹脂、ポリイミド樹脂、ゴム系ネガ
型レジスト、ノボラック系ポジ型レジスト、ポリスチレ
ン、ポリメチルメタクリレート等を挙げることができる
。前記下地用樹脂の6機溶媒としては、格別限定されず
、例えばトルエン、キシレン、0−ジクロルベンゼン、
クロロホルム、jタノール、イソプロピルアルコール、
シクロベ。
タノン、シクロヘキサノン、酢酸セロソルブ、メチルエ
チルケトン等を挙げることができる。前記下地用樹脂膜
の乾燥条件は、通常50〜250℃で0.5〜120分
間、好ましくは80〜220℃で1〜90分間である。
チルケトン等を挙げることができる。前記下地用樹脂膜
の乾燥条件は、通常50〜250℃で0.5〜120分
間、好ましくは80〜220℃で1〜90分間である。
つづいて、前記下地用樹脂膜上に有機溶媒で溶解された
本発明の感光性組成物からなるレジスト液を回転塗布法
やディピング法により塗布した後、乾燥して感光膜を形
成する。ここに用いる有機溶媒は、前記下地用樹脂と同
様なものを使用すればよい。また、かかる感光膜の乾燥
条件は通常50〜20℃で0.5〜120分間、好まし
くは80〜220℃で1〜BO分間である。
本発明の感光性組成物からなるレジスト液を回転塗布法
やディピング法により塗布した後、乾燥して感光膜を形
成する。ここに用いる有機溶媒は、前記下地用樹脂と同
様なものを使用すればよい。また、かかる感光膜の乾燥
条件は通常50〜20℃で0.5〜120分間、好まし
くは80〜220℃で1〜BO分間である。
次いで、前記感光膜に常法に従って紫外線、可視光線、
電子線、X線等のエネルギー線を選択的に照射して露光
を行なう。つづいて、適正なアルカリ溶液で現像処理を
行なう。これにより、感光膜の露光部分が溶解除去され
る。ここに用いるアルカリ水溶液は、感光膜の露光部分
が速やかに溶解し、他の非露光部分に対する溶解速度が
極端に低い性質を有するものであればいずれでもよく、
例えばテトラメチルアンモニウム水溶液、などのアンモ
ニア系水溶液、又は水酸化カリウム、水酸化ナトリウム
等の無機アルカリ水溶液等を挙げることができる。つづ
いて、100〜200℃で30秒間〜120分間、好ま
しくは120〜180℃で1〜90分間乾燥を行なった
後、前記現像により選択的に溶解除去された感光膜から
露出する下地用樹脂膜を酸素リアクティブエツチング法
でエツチング除去することによって、所定のレジストパ
ターンを形成する。この後、該レジストパターンをマス
クとしてシリコン単結晶ウェハ単体、表面に絶縁膜や導
電膜等の各種の波膜が堆積された同ウェハ又はマスクブ
ランク等からなる基板を選択的にエツチングして所定の
パターンを形成する。
電子線、X線等のエネルギー線を選択的に照射して露光
を行なう。つづいて、適正なアルカリ溶液で現像処理を
行なう。これにより、感光膜の露光部分が溶解除去され
る。ここに用いるアルカリ水溶液は、感光膜の露光部分
が速やかに溶解し、他の非露光部分に対する溶解速度が
極端に低い性質を有するものであればいずれでもよく、
例えばテトラメチルアンモニウム水溶液、などのアンモ
ニア系水溶液、又は水酸化カリウム、水酸化ナトリウム
等の無機アルカリ水溶液等を挙げることができる。つづ
いて、100〜200℃で30秒間〜120分間、好ま
しくは120〜180℃で1〜90分間乾燥を行なった
後、前記現像により選択的に溶解除去された感光膜から
露出する下地用樹脂膜を酸素リアクティブエツチング法
でエツチング除去することによって、所定のレジストパ
ターンを形成する。この後、該レジストパターンをマス
クとしてシリコン単結晶ウェハ単体、表面に絶縁膜や導
電膜等の各種の波膜が堆積された同ウェハ又はマスクブ
ランク等からなる基板を選択的にエツチングして所定の
パターンを形成する。
(作用)
本発明の感光性組成物は、上記一般式(1)又は(II
)にて表わされる重合体からなり、紫外線、可視光線、
電子線、X線等のエネルギー線により、該照射部が分解
してアルカリ水溶液に可溶な成分が生成されるため、前
記エネルギー線による露光、アルカリ水溶液による現像
操作により微細なパターンを精度よく形成できる。
)にて表わされる重合体からなり、紫外線、可視光線、
電子線、X線等のエネルギー線により、該照射部が分解
してアルカリ水溶液に可溶な成分が生成されるため、前
記エネルギー線による露光、アルカリ水溶液による現像
操作により微細なパターンを精度よく形成できる。
(発明の実施例)
以下、本発明の実施例を詳細に説明す。
実施例1
下記構造式(A)の重合体■とオルソニトロベンジルク
ロライドとからフェノール単位の75%がオルソニトロ
ベンジルエーテル化した重合体■を合成した。つづいて
、この重合体■をシクロヘキサノンに溶解して感光液と
した後、この感光液をスピンナーでシリコン単結晶ウェ
ハ上に塗布し乾燥して厚さ0.7μmの感光膜を形成し
た。ひきつづき、この感光膜に0.5μm間隔のパター
ン有するマスクを接触させ、高圧水銀灯(CA800)
によりコンタクト露光を行なった。次いで、露光後の感
光膜を4%のテトラメチルアンモニウムハイドロキシド
水溶液で現像したところ、マスクパターンに忠実な0.
5μm幅のパターンを高精度で形成できた。
ロライドとからフェノール単位の75%がオルソニトロ
ベンジルエーテル化した重合体■を合成した。つづいて
、この重合体■をシクロヘキサノンに溶解して感光液と
した後、この感光液をスピンナーでシリコン単結晶ウェ
ハ上に塗布し乾燥して厚さ0.7μmの感光膜を形成し
た。ひきつづき、この感光膜に0.5μm間隔のパター
ン有するマスクを接触させ、高圧水銀灯(CA800)
によりコンタクト露光を行なった。次いで、露光後の感
光膜を4%のテトラメチルアンモニウムハイドロキシド
水溶液で現像したところ、マスクパターンに忠実な0.
5μm幅のパターンを高精度で形成できた。
+5t−O→−
H
[Al
実施例2
まず、シリコンウェハ上にフェノールノボラック型レジ
スト(東京応化社製商品名: 0PPR800)をスピ
ンナーで塗布し、乾燥して厚さ1.5μmのレジスト膜
を形成した後、このレジスト膜上に実施例1と同様なシ
クロヘキサノンで溶解した重合体■からなる感光液をス
ピンナーで塗布し乾燥して厚さ0.6μmの感光膜を形
成した。つづいて、実施例1と同様にコンタクト露光、
4%のテトラメチルアンモニウムハイドロキシド水溶液
で現像を行なうことにより0.5μmのパターンを形成
た。次いで、シリコンウェハを0.05torrs O
,OC/iの条件で酸素プラズマを30分間処理したと
ころ、0.5μmのパターンを高精度で形成できた。
スト(東京応化社製商品名: 0PPR800)をスピ
ンナーで塗布し、乾燥して厚さ1.5μmのレジスト膜
を形成した後、このレジスト膜上に実施例1と同様なシ
クロヘキサノンで溶解した重合体■からなる感光液をス
ピンナーで塗布し乾燥して厚さ0.6μmの感光膜を形
成した。つづいて、実施例1と同様にコンタクト露光、
4%のテトラメチルアンモニウムハイドロキシド水溶液
で現像を行なうことにより0.5μmのパターンを形成
た。次いで、シリコンウェハを0.05torrs O
,OC/iの条件で酸素プラズマを30分間処理したと
ころ、0.5μmのパターンを高精度で形成できた。
実施例3〜5
下記構造式〔B〕、[C)、(D〕の重合体をシクロヘ
キサノンで溶解した3種の感光液を、夫々実施例2と同
様にシリコンウェハ上のフェノールノボラック型レジス
ト(東京応化社製商品2二〇FPR800)からなる厚
さ1,5μmのレジスト膜にスピンナーで塗布し乾燥し
て厚さ0.6μmの感光膜を形成し、コンタクト露光、
4%のテトラメチルアンモニウムハイドロキシド水溶液
で現像を行ない、更に酸素プラズマ処理を施したところ
、夫々0.5μmのパターンを高精度で形成できた。
キサノンで溶解した3種の感光液を、夫々実施例2と同
様にシリコンウェハ上のフェノールノボラック型レジス
ト(東京応化社製商品2二〇FPR800)からなる厚
さ1,5μmのレジスト膜にスピンナーで塗布し乾燥し
て厚さ0.6μmの感光膜を形成し、コンタクト露光、
4%のテトラメチルアンモニウムハイドロキシド水溶液
で現像を行ない、更に酸素プラズマ処理を施したところ
、夫々0.5μmのパターンを高精度で形成できた。
→S1−〇÷−431−0÷−DC113(30%)(
70%) [B] CH3CH3 →81÷−−−÷81→− CII02)15C1lc2115 (20%)(80%) [C3 [D] [発明の効果] 以上詳述した如く、本発明の感光性組成物によれば紫外
線、可視光線、電子線、X線等のエネルギー線により該
照射部が分解してアルカリ水溶液に可溶な成分を生成で
きるため、前記エネルギー線による露光、アルカリ水溶
液による現像操作により微細なパターンを精度よく形成
することができ、ひいては半導体装置等のフォトエツチ
ング工程に有効に利用できる等顕著な効果を有する。
70%) [B] CH3CH3 →81÷−−−÷81→− CII02)15C1lc2115 (20%)(80%) [C3 [D] [発明の効果] 以上詳述した如く、本発明の感光性組成物によれば紫外
線、可視光線、電子線、X線等のエネルギー線により該
照射部が分解してアルカリ水溶液に可溶な成分を生成で
きるため、前記エネルギー線による露光、アルカリ水溶
液による現像操作により微細なパターンを精度よく形成
することができ、ひいては半導体装置等のフォトエツチ
ング工程に有効に利用できる等顕著な効果を有する。
Claims (1)
- 【特許請求の範囲】 下記一般式( I )又は(II)にて表わされる構造単位
を有する重合体からなることを特徴とする感光性組成物
。 ▲数式、化学式、表等があります▼( I ) ▲数式、化学式、表等があります▼(II) 但し、式中のR_1〜R_4及びR_1_4〜R_1_
7は同一であっても、異なってもよく、夫々水素原子、
炭素数1〜10の脂肪族基、炭素数6〜14の非置換も
しくは置換芳香族基、R_5〜R_8は同一であっても
、異なってもよく、水素原子、水酸基、アルコキシ基、
炭素数1〜10の脂肪族基、炭素数6〜14の非置換も
しくは置換芳香族基、R_9〜R_1_3は同一であっ
ても、異なってもよく、夫々水素原子、ハロゲン原子、
炭素数1〜12のアルキル基、炭素数1〜12のアルコ
キシ基、シアノ基、ニトロ基、ヒドロキシ基、mは正の
整数、nは零を含む正の整数を示す。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29248786A JPS63146038A (ja) | 1986-12-10 | 1986-12-10 | 感光性組成物 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29248786A JPS63146038A (ja) | 1986-12-10 | 1986-12-10 | 感光性組成物 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63146038A true JPS63146038A (ja) | 1988-06-18 |
Family
ID=17782453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29248786A Pending JPS63146038A (ja) | 1986-12-10 | 1986-12-10 | 感光性組成物 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63146038A (ja) |
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1986
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