JPH01204043A - Resist composition - Google Patents

Resist composition

Info

Publication number
JPH01204043A
JPH01204043A JP2740388A JP2740388A JPH01204043A JP H01204043 A JPH01204043 A JP H01204043A JP 2740388 A JP2740388 A JP 2740388A JP 2740388 A JP2740388 A JP 2740388A JP H01204043 A JPH01204043 A JP H01204043A
Authority
JP
Japan
Prior art keywords
resist
formula
benzophenone
silylated
solvent
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.)
Pending
Application number
JP2740388A
Other languages
Japanese (ja)
Inventor
Shoji Shiba
昭二 芝
Kazumasa Saito
斎藤 和正
Yoko Kawasaki
陽子 川崎
Keiji Watabe
慶二 渡部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2740388A priority Critical patent/JPH01204043A/en
Publication of JPH01204043A publication Critical patent/JPH01204043A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03FPHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004Photosensitive materials
    • G03F7/075Silicon-containing compounds
    • G03F7/0757Macromolecular compounds containing Si-O, Si-C or Si-N bonds

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To form a fine pattern of the title composition by dissolving a specified silylated polyorganosiasesquioxane and a benzophenone derivative in an org. solvent or a ketone solvent. CONSTITUTION:The upper layer resist material of a resist having two layers structure is composed of a composition obtd. by dissolving the silylated polyorganosiasesquioxane shown by formula I and the tetra(alkylperoxycarbonyl) benzophenone shown by formula II such as preferably, 3,3',4,4'-tetra(t- butylperoxycarbonyl)benzophenone in the aromatic solvent (such as toluene or xylene), etc., or the ketone solvent (such as methyl isobutyl ketone, etc.). In formula I, (n) is an integer of 10-100, R is alkenyl group (such as -CH=CH2 or -CH2CH=CH2 group, etc.). In formula II, R' is 1-4C a lower alkyl group such as preferably, t-butyl group. Thus, the fine pattern which has high sensitivity and a submicron order can be formed by exposing the resist composition with Deep-UV rays.

Description

【発明の詳細な説明】 〔概 要〕 二層構造レジストの上層レジスト材料として有用なレジ
スト組成物に関し、 Deep −UV光に高い感度を有するネガ型レジスト
材料を得るために、 下記式■、 〔上式中、nは10〜1000の整数を表し、Rはアル
ケニル基を表し、同一であっても異なっていても良い。
[Detailed Description of the Invention] [Summary] Regarding a resist composition useful as an upper layer resist material of a two-layer structure resist, in order to obtain a negative resist material having high sensitivity to Deep-UV light, the following formula (1), [ In the above formula, n represents an integer of 10 to 1000, and R represents an alkenyl group, which may be the same or different.

〕 で示されるシリル化ポリオルガノシルセスキオキサンと
下記式■、 〔上式中、R′は炭素数1〜4の低級アルキル基を表す
〕 で示されるテトラ(アルキルペルオキシカルボニル)ベ
ンゾフェノンとを芳香族系溶剤もしくはケトン系溶剤に
溶解して構成する。
] A silylated polyorganosilsesquioxane represented by the following formula (1), [In the above formula, R' represents a lower alkyl group having 1 to 4 carbon atoms] Tetra(alkylperoxycarbonyl)benzophenone represented by the following formula It is formed by dissolving it in a group-based solvent or a ketone-based solvent.

〔産業上の利用分野〕[Industrial application field]

本発明は、レジスト組成物に関する。本発明に係るレジ
スト組成物は、二層構造レジストの上層レジスト材料と
して有用である。
The present invention relates to a resist composition. The resist composition according to the present invention is useful as an upper layer resist material of a two-layer resist.

〔従来の技術〕[Conventional technology]

LSIの高集積化に伴い、LSIのパターン幅は益々微
細化される傾向にある。現在の256KDRAMの最少
線幅は約1.2−であり、本パターンの形成はg−1i
neを用いた縮少投影露光により、ポジ型フォトレジス
トを用いて行われる。しかし、このような縮少投影露光
は、レジスト膜中に発生する定在波や配線からの側面反
射、焦点深度が浅い等の問題で解像性が低下する。そこ
で、かかる問題を解決するプロセスの開発が要望されて
いる。現在、二層構造レジストプロセスが検討されてい
る。
As LSIs become more highly integrated, the pattern width of LSIs tends to become smaller and smaller. The minimum line width of current 256K DRAM is about 1.2-, and the formation of this pattern is g-1i.
This is done using a positive photoresist by reduced projection exposure using ne. However, such reduced projection exposure reduces resolution due to problems such as standing waves generated in the resist film, side reflections from wiring, and shallow depth of focus. Therefore, there is a need to develop a process that solves this problem. Currently, a two-layer resist process is being considered.

二層構造レジストの上層レジスト材料としては、シリコ
ン原子を含有するポリマーとアジドあるいはビスアジド
化合物の混合体よりなるネガ型レジスト、およびシリコ
ン原子を含有するアルカリ可溶性樹脂とO−ナフトキノ
ンジアジド誘導体との混合体よりなるポジ型レジストが
ある。ポジ型レジストは、耐酸素プラズマ性が不十分で
あり、上層パターンの転写時にパターン幅のシフトが起
こる。また、ネガ型レジストでは、感光剤がアジド化合
物であり、吸収光のピークが350nm付近にあるため
、Deep−UV光に対しては感度が低い等の問題点が
あり、これらの問題点を解消する二層構造レジストの上
層レジスト材料の開発が要望されている。
The upper layer resist material of the two-layer resist is a negative resist made of a mixture of a polymer containing silicon atoms and an azide or bisazide compound, and a mixture of an alkali-soluble resin containing silicon atoms and an O-naphthoquinonediazide derivative. There are several positive resists. A positive resist has insufficient oxygen plasma resistance, and a pattern width shift occurs when an upper layer pattern is transferred. In addition, in negative resists, the photosensitizer is an azide compound, and the peak of absorption light is around 350 nm, so there are problems such as low sensitivity to deep-UV light, and these problems have been solved. There is a need for the development of a resist material for the upper layer of a two-layer resist.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

本発明は、従って、二層構造レジストの上層レジスト材
料として用いることができ、Deep −UV光(特に
、波長250nm(j近の光)に高い感度を有するネガ
型レジスト材料を提供することを目的とする。本発明は
、また、そのような材料を二層構造レジストの上層レジ
スト材料として用いるパターン形成方法を提供する。
Therefore, an object of the present invention is to provide a negative resist material that can be used as an upper layer resist material of a two-layer resist and has high sensitivity to deep-UV light (particularly, light at a wavelength of 250 nm (near j). The present invention also provides a pattern forming method using such a material as an upper resist material of a two-layer resist.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は、即ち、下記式!、 〔上式中、nはlO〜1000の整数を表し、Rはアル
ケニル基を表し、同一であっても異なっていても良い。
In other words, the present invention is based on the following formula! , [In the above formula, n represents an integer of 10 to 1000, R represents an alkenyl group, and may be the same or different.

〕 で示されるシリル化ポリオルガノシルセスキオキサンと
下記式■、 〔上式中、R′は炭素数1〜4の低級アルキル基を表す
〕 で示されるテトラ(アルキルペルオキシカルボニル)ベ
ンゾフェノンとを芳香族系溶剤もしくはケトン系溶剤に
溶解してなるレジスト組成物を提供する。
] A silylated polyorganosilsesquioxane represented by the following formula (1), [In the above formula, R' represents a lower alkyl group having 1 to 4 carbon atoms] Tetra(alkylperoxycarbonyl)benzophenone represented by the following formula Provided is a resist composition dissolved in a group-based solvent or a ketone-based solvent.

本発明は、また、上記レジスト組成物を二層構造レジス
トの上層レジスト材料として用いることを特徴とするパ
ターン形成方法を提供する。
The present invention also provides a pattern forming method characterized in that the above resist composition is used as an upper layer resist material of a two-layer structure resist.

上記−数式夏のシリル化ポリオルガノシルセスキオキサ
ンにおいて、Rとしてのアルケニル基の例としては、−
Cl(=CL、 (HzCH=CHz、−C11==C
llCHz、−C= C)12、 CI = CIIC
ILzCH:+、−C)1.cH=CI。
Examples of the alkenyl group as R in the silylated polyorganosilsesquioxane of the above formula are -
Cl(=CL, (HzCH=CHz, -C11==C
llCHHz, -C=C)12, CI=CIIC
ILzCH:+, -C)1. cH=CI.

CIICI(3、Cl1zC=CHz等がある。CIICI (3, Cl1zC=CHz, etc.).

CI。C.I.

また、上記−数式■において、R′はt−ブチルである
のが好ましく、−数式■のテトラ(アルキルペルオキシ
カルボニル)ベンゾフェノンとしては、3.3’、4.
4’−テトラ(t−ブチルペルオキシカルボニル)ベン
ゾフェノンがもっとも好ましい。
Furthermore, in the above formula (2), R' is preferably t-butyl, and the tetra(alkylperoxycarbonyl)benzophenone in the formula (2) is 3.3', 4.
Most preferred is 4'-tetra(t-butylperoxycarbonyl)benzophenone.

また、本発明に有用な芳香族系溶剤としてはトルエン、
キシレン等があり、ケトン系溶剤としてはメチルイソブ
チルケトン、ジイソブチルケトン等がある。
Further, aromatic solvents useful in the present invention include toluene,
Examples include xylene, and ketone solvents include methyl isobutyl ketone and diisobutyl ketone.

〔作 用〕[For production]

本発明に係るレジスト組成物を二層構造レジストの上層
レジスト材料として用いた場合、Deep −UV光(
特に波長25Onm付近)によるパターン露光により、
−数式Hの化合物が光重合開始剤として作用し、これが
Deep −UV光により分解して効率よくラジカルを
発生し、−数式!で示されるラダー型構造を有するシリ
コーンポリマーを架橋せしめる。しかして、このラダー
型シリコーン樹脂は、Deep −UV光露光によりパ
ターニングされた上層パターンを下層に転写するための
プラズマエツチングに際して用いられる酸素プラズマに
対して高い耐性を有する。従って、本発明に係るレジス
ト組成物は、二層構造レジストの上層材料として極めて
有用である。
When the resist composition according to the present invention is used as an upper resist material of a two-layer structure resist, deep-UV light (
In particular, by pattern exposure using a wavelength of around 25 Onm,
-The compound of formula H acts as a photopolymerization initiator, which is decomposed by Deep UV light to efficiently generate radicals, -formula! A silicone polymer having a ladder-type structure shown in is crosslinked. Therefore, this ladder-type silicone resin has high resistance to oxygen plasma used in plasma etching for transferring an upper layer pattern patterned by deep-UV light exposure to a lower layer. Therefore, the resist composition according to the present invention is extremely useful as an upper layer material of a two-layer resist.

〔実施例〕〔Example〕

以下、実施例を挙げて本発明をさらに説明する。 The present invention will be further explained below with reference to Examples.

立炭桝 メチルイソブチルケトン(旧BK) 100−にピリジ
ン18rn1を加え、−60℃に冷却した。これに、ビ
ニルトリクロルシラン30gを、次いでイオン交換水1
8m1を滴下し、反応溶液を徐々に昇温した。さらに、
窒素ガスでバブリングを行ないながら、120℃で5時
間縮重合反応を行った。反応終了後、溶液を5〜6回水
洗し、MIIIK層を分取した。
Pyridine 18rn1 was added to methyl isobutyl ketone (formerly BK) 100- and cooled to -60°C. To this, add 30g of vinyltrichlorosilane, then add 11g of ion-exchanged water.
8 ml was added dropwise, and the temperature of the reaction solution was gradually raised. moreover,
A polycondensation reaction was carried out at 120° C. for 5 hours while bubbling with nitrogen gas. After the reaction was completed, the solution was washed with water 5 to 6 times, and the MIIIK layer was separated.

次に、トリメチルクロルシラン30dとピリジン30−
を加え、60℃で2時間加熱を行ない、未反応水酸基を
シリル化した。次に、反応溶液を10回水洗し、アセト
ニトリル中に投入してシリル化ポリビニルシルセスキオ
キサンを沈殿回収した。得られた樹脂をベンゼン50−
に溶解し、凍結乾燥を行った。本合成例により得られた
シリル化ポリビニルシルセスキオキサンは、Mw=5.
0XIO’  、 Mw /Mn = 1.8であった
Next, trimethylchlorosilane 30d and pyridine 30-
was added and heated at 60°C for 2 hours to silylate unreacted hydroxyl groups. Next, the reaction solution was washed with water 10 times and poured into acetonitrile to precipitate and collect silylated polyvinylsilsesquioxane. The obtained resin was mixed with benzene 50-
and freeze-dried. The silylated polyvinylsilsesquioxane obtained in this synthesis example had an Mw of 5.
0XIO', Mw/Mn = 1.8.

大施炎 合成例で得たシリル化ポリビニルシルセスキオキサン1
gをトルエン9gに溶解し、3.3’。
Silylated polyvinylsilsesquioxane 1 obtained in large flame synthesis example
Dissolve g in 9 g of toluene and make 3.3'.

4.4′−テトラ(t−ブチルペルオキシカルボニル)
ベンゾフェノン0.05gを添加してレジスト溶液を調
製した。
4.4'-tetra(t-butylperoxycarbonyl)
A resist solution was prepared by adding 0.05 g of benzophenone.

シリコン基板上に、下層レジストとして肝−1350レ
ジスト (シラプレー社製)を膜N、2 pmとなるよ
うにスピンコードし、200℃で1時間加熱して硬化さ
せた。この股上に上記レジスト溶液を膜厚0.2μとな
るようにスピンコードし、60℃で20分間溶剤乾燥を
行った。
On the silicon substrate, a lower layer resist, Liver-1350 resist (manufactured by Silapray), was spin-coded to a film thickness of 2 pm and cured by heating at 200° C. for 1 hour. The above resist solution was spin-coated onto this crotch to a film thickness of 0.2 μm, and solvent-dried at 60° C. for 20 minutes.

この試料に対して、248nmのDeep −UV光を
用いて、ソフトコンタクトによるマスク露光を行った。
This sample was subjected to mask exposure using soft contact using 248 nm deep-UV light.

次いで、MIBKに30秒間浸漬して現像し、さらにイ
ソプロピルアルコールにて30秒間リンス処EIを行っ
た。次に、被処理基板を平行平板型ドライエツチング装
置(日型アネルバ社製)にセットし、酸素プラズマにて
エツチングを行ない、上層パターンを下層に転写した。
Next, the film was developed by immersing it in MIBK for 30 seconds, and was further rinsed with isopropyl alcohol for 30 seconds to perform EI. Next, the substrate to be processed was set in a parallel plate type dry etching device (manufactured by Nikkei Anelva Co., Ltd.), and etching was performed using oxygen plasma to transfer the upper layer pattern to the lower layer.

この結果、このレジストの感度は20mJ/CrAで、
0.5pの!!/Sパターンを解像できることが確認さ
れた。
As a result, the sensitivity of this resist is 20 mJ/CrA,
0.5p! ! It was confirmed that the /S pattern could be resolved.

〔発明の効果〕〔Effect of the invention〕

本発明に係るレジスト組成物を二層構造レジストの上層
レジスト材料として用い、これをDeep −UV光で
露光することにより、高い感度をもってサブミクロンの
オーダーの微細パターンを形成することができる。
By using the resist composition according to the present invention as an upper layer resist material of a two-layer structure resist and exposing it to deep-UV light, a fine pattern on the order of submicrons can be formed with high sensitivity.

Claims (1)

【特許請求の範囲】 1、下記式 I 、 ▲数式、化学式、表等があります▼ 〔上式中、nは10〜1000の整数を表し、Rはアル
ケニル基を表し、同一であっても異なっていても良い。 〕 で示されるシリル化ポリオルガノシルセスキオキサンと
下記式II、 ▲数式、化学式、表等があります▼ 〔上式中、R′は炭素数1〜4の低級アルキル基を表す
〕 で示されるテトラ(アルキルペルオキシカルボニル)ベ
ンゾフェノンとを芳香族系溶剤もしくはケトン系溶剤に
溶解してなるレジスト系組成物。 2、第1項記載のレジスト組成物を二層構造レジストの
上層レジスト材料として用いることを特徴とするパター
ン形成方法。
[Claims] 1. The following formula I, ▲ Numerical formulas, chemical formulas, tables, etc. You can leave it there. ] The silylated polyorganosilsesquioxane represented by the following formula II, ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [In the above formula, R' represents a lower alkyl group having 1 to 4 carbon atoms] A resist composition prepared by dissolving tetra(alkylperoxycarbonyl)benzophenone in an aromatic solvent or a ketone solvent. 2. A pattern forming method, characterized in that the resist composition according to item 1 is used as an upper layer resist material of a two-layer resist.
JP2740388A 1988-02-10 1988-02-10 Resist composition Pending JPH01204043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2740388A JPH01204043A (en) 1988-02-10 1988-02-10 Resist composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2740388A JPH01204043A (en) 1988-02-10 1988-02-10 Resist composition

Publications (1)

Publication Number Publication Date
JPH01204043A true JPH01204043A (en) 1989-08-16

Family

ID=12220102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2740388A Pending JPH01204043A (en) 1988-02-10 1988-02-10 Resist composition

Country Status (1)

Country Link
JP (1) JPH01204043A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009035676A (en) * 2007-08-03 2009-02-19 Sekisui Chem Co Ltd Photocurable composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009035676A (en) * 2007-08-03 2009-02-19 Sekisui Chem Co Ltd Photocurable composition

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