JPH0439665A - 放射線感光レジストとパターン形成方法 - Google Patents
放射線感光レジストとパターン形成方法Info
- Publication number
- JPH0439665A JPH0439665A JP2146803A JP14680390A JPH0439665A JP H0439665 A JPH0439665 A JP H0439665A JP 2146803 A JP2146803 A JP 2146803A JP 14680390 A JP14680390 A JP 14680390A JP H0439665 A JPH0439665 A JP H0439665A
- Authority
- JP
- Japan
- Prior art keywords
- resist
- radiation
- pattern
- sensitive material
- polymer
- 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.)
- Granted
Links
Landscapes
- Materials For Photolithography (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
め要約のデータは記録されません。
Description
光に対して透明性に優れたレジストを実用化することを
目的とし、 エステル部にアダマンタン骨格を有するアクリル酸エス
テルまたはα置換アクリル酸エステルの重合体か、或い
は該エステルの共重合体からなる放射線感光材料を用い
てレジストを形成し、該レジストを塗布した被処理基板
に放射線を選択露光した後に現像し、レジストパターン
を形成することを特徴としてパターン形成方法を構成す
る。
用化されており、これと共に配線パターンの最小線幅は
サブミクロン(Sub−micron)に及んでいるが
更に微細化の傾向にある。
基板上にレジストを被覆し、選択露光を行った後に現像
してレジストパターンを作り、これをマスクとしてドラ
イエツチングを行い、その後にレジストを溶解除去する
ことにより薄膜パターンを得る写真蝕刻技術の使用が必
須である。
が使用されていたが、波長による制限からサブミクロン
幅の解像は不可能であり、これに代わって波長の短い遠
紫外線や電子線、X線などを光源としてサブミクロン幅
の解像が行われるようになった。
る。
のが数多く開発されてきた。
大きく、そのため微細化に対応できるだけのパターン精
度は得られない。
ト(略称PMMA )やポリメチルイソプロピルケトン
(略称PMIPK)などが検討されているが、芳香族環
を含んでいないために充分なエツチング耐性をもってい
ない。
グ耐性を備えたレジストは実用化されていない。
るには遠紫外光に対して透明性が優れ、且つ、充分なエ
ツチング耐性をもつ感光材料が必要であり、この両方の
特性を兼ね備えた放射用感光材料を実用化することが課
題である。
クリル酸エステルまたはα置換アクリル酸エステルの重
合体か、或いはこのエステルの共重合体からなる放射線
感光材料を用いてレジストを形成し、このレジストを塗
布した被処理基板に放射線を選択露光した後に現像し、
レジストパターンを形成することを特徴としてパターン
形成方法を構成することにより・解決することができる
。
エツチング耐性をもつ感光材料として、アダマンタン骨
格を有するアクリル酸エステルまたはα置換アクリル酸
エステルの重合体か、或いはこのエステルの共重合体か
らなる材料を用いるものである。
(C+。H16)は椅子型構造のシクロヘキサン環を構
成単位としており化学的に非常に安定な化合物として知
られ、医薬品への用途開発が試みられている。
香族環がないにも拘らず優れたエツチング耐性を示し、
また遠紫外光に対して吸収が少ない点に着目した。
骨格を有するアクリル酸エステルまたはα置換アクリル
酸エステルの重合体か、或いはこのエステルの共重合体
を感光材料として使用するものである。
に透明性に優れているため、精度よくサブミクロンパタ
ーンを形成することができる。
レート4.4gとベンゼン5.0gに反応開始剤として
アゾイソブルロニトリル(略称ArBN)0.5モル%
を加え、70°Cで約8時間重合した後、メタノールで
再沈精製を行った結果、重量平均分子量18万9分散度
1.6のポリマーが得られた。
厚に被覆し、遠紫外光(248nm)に対する透明性を
調べた結果、透過率は97%であって、PMMAと同等
であった。
ック樹脂の透過率は30%である。
トをPMMAと比較した結果、PMMAのエラチンレー
トが1330人/分であるのに対しポリアダマンチルメ
タクリレートは860 A/分と優れていた。
。
W、高周波電力は100Wである。
架橋剤として第1図の(3)式に構造式を示す4.4′
−ジアジドジフェニルメチレンを20重量%添加してキ
シレン溶液とし、Si基板上に0.5μmの厚さに塗布
した後、100℃で30分間プリベークした。
0秒間露光した後、キシレンで60秒間現像してパター
ンニング特性を調べた。
ーンを解像することができた。
nm)用レジストを用い、実施例1と同様な実験を行っ
たが、得られたレジストパターンの断面形状はテーパー
状となった。
図の(4)式に構造式を示すジメチルアダマンクンアク
リレートを用いて同様な実験を行った結果、同様な結果
が得られた。
ニルメチレンの代わりに第1図の(5)式に構造式を示
す4,4′−ジアジドフェニルスルホンを用いても同様
な結果を得ることができた。
トとメタクリル酸とを1.4−ジオキサン中で80℃、
8時間重合させた後、ヘキサンを用いて再沈精製を行っ
た結果、重量平均分子量2万9分散度2.01組成比が
7:3の共重合体が得られた。
ルメチレンを30重量%加えてシクロヘキサン溶液とし
、Si基板上に0.5μmの厚さに塗布した後、100
℃、30分間プリベークを行った。
、アルカリ現像を行った。
ーンを解像することができた。
トの場合と同様であった。
トとメタクリル酸t−ブチルを共重合した結果、重量平
均分子量1.2万9分散度1.52組成比が6:4の共
重合体が得られた。
造式を示すトリフェニルスルホニウムへキサフロロホス
フェートを5重量%加えてシクロヘキサン溶液とし、S
i基板上に1.0μ0の厚さに塗布した後、90°C1
30分間プリベークを行った。
110℃で20分のベークを行った後、アルカリ現像を
行った。
ーンを解像することができた。
レートの場合と同様であり、また樹脂の透明性はPMM
Aと同様であった。
構造式を示すジフェニルアイオードへキサフロロホスフ
ェートを用いても同様な結果が得られた。
にアダマンチルアクリレートを用いた場合も同様な結果
を得ることができた。
2万9分散度1.52組成比が6:4の共重合体が得ら
れた。
ジアドカルコンを7重量%添加してキシレン溶液とした
。
、N2気流中で200°C,1時間のプリベークを行い
、熱架橋させて不溶化した後、加速電圧20KVの電子
線露光装置で露光した。
露光量で0.8μmのライン・アンド・スペースパター
ンを解像することができた。
耐性を比較した結果、PMMAの1.5倍であった。
にキシレンを用いることにより、0.8μmのライン・
アンド・スペースのネガパターンを得ることができた。
つ充分なエツチング耐性をもつレジストパターンを得る
ことができ、これによりサブミクロン・パターンを得る
ことができる。
造式である。 アダマンタンの構造式 アダマンチルメタクリレートの構造式 N5−()CH2÷N3011.(3)44゛ −ジ
アジドフェニルメチレンの構造式トリフェニルスルホニ
ウムへキサフロロホスフェートの構造式ジフェニノしア
イオートペキサフロロホスフエートの平Uジメチルアダ
マンタンアクリレートの構造式%式%(5 4,4° −ジアジドジブエニルスルホンの構造式本発
明の実施においてイ吏用した有Wヒ合物の橢左式第 1
図 (その2) 本発明の実施において使用した有機化合物の構造式第
1 図 (その1)
Claims (2)
- (1)エステル部にアダマンタン骨格を有するアクリル
酸エステルまたはα置換アクリル酸エステルの重合体か
、或いは該エステルの共重合体からなることを特徴とす
る放射線感光材料。 - (2)請求項1記載の放射線感光材料を用いてレジスト
を形成し、該レジストを塗布した被処理基板に放射線を
選択露光した後に現像し、レジストパターンを形成する
ことを特徴とするパターン形成方法。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2146803A JP2881969B2 (ja) | 1990-06-05 | 1990-06-05 | 放射線感光レジストとパターン形成方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2146803A JP2881969B2 (ja) | 1990-06-05 | 1990-06-05 | 放射線感光レジストとパターン形成方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0439665A true JPH0439665A (ja) | 1992-02-10 |
| JP2881969B2 JP2881969B2 (ja) | 1999-04-12 |
Family
ID=15415885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2146803A Expired - Lifetime JP2881969B2 (ja) | 1990-06-05 | 1990-06-05 | 放射線感光レジストとパターン形成方法 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2881969B2 (ja) |
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