JP2004045774A - Resist stripper composition - Google Patents
Resist stripper composition Download PDFInfo
- Publication number
- JP2004045774A JP2004045774A JP2002203250A JP2002203250A JP2004045774A JP 2004045774 A JP2004045774 A JP 2004045774A JP 2002203250 A JP2002203250 A JP 2002203250A JP 2002203250 A JP2002203250 A JP 2002203250A JP 2004045774 A JP2004045774 A JP 2004045774A
- Authority
- JP
- Japan
- Prior art keywords
- resist
- resist stripping
- water
- stripping composition
- acid
- 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
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- 239000000203 mixture Substances 0.000 title claims abstract description 34
- 239000004065 semiconductor Substances 0.000 claims abstract description 16
- 150000002222 fluorine compounds Chemical class 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- -1 hydroxybutyamide Chemical compound 0.000 claims description 14
- 239000003960 organic solvent Substances 0.000 claims description 13
- 125000004122 cyclic group Chemical group 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 10
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 claims description 9
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 9
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 7
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 6
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- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical group CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 6
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- 150000001408 amides Chemical group 0.000 description 3
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- 229910018182 Al—Cu Inorganic materials 0.000 description 2
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- 239000004202 carbamide Substances 0.000 description 1
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- 229910052804 chromium Inorganic materials 0.000 description 1
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- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
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- UNFDKMXBKPSFIJ-UHFFFAOYSA-N hydroxylamine;hydrofluoride Chemical compound F.ON UNFDKMXBKPSFIJ-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
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- 229940044600 maleic anhydride Drugs 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
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- RRSMHQNLDRCPQG-UHFFFAOYSA-N methanamine;hydrofluoride Chemical compound [F-].[NH3+]C RRSMHQNLDRCPQG-UHFFFAOYSA-N 0.000 description 1
- MOVBJUGHBJJKOW-UHFFFAOYSA-N methyl 2-amino-5-methoxybenzoate Chemical compound COC(=O)C1=CC(OC)=CC=C1N MOVBJUGHBJJKOW-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
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- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 150000002923 oximes Chemical class 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
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- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
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Images
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- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、半導体集積回路、液晶パネル素子、マイクロマシン等のリソグラフィー工程において使用されるレジスト剥離液組成物に関し、さらに詳しくはエッチング、アッシング後のレジスト残渣物を除去するためのレジスト剥離液組成物に関するものである。
【0002】
【従来の技術】
従来、レジスト残渣物を除去する剥離液としてはアルカリ性剥離液が一般的に使用されている。アルカリ性剥離液としてはヒドロキシルアミンを含むものが多用されており、特開平7−325404号公報、特開平11−194505号公報に記載のアルカノールアミンとヒドロキシルアミンを含む組成物が開示されている。これらのレジスト剥離液は使用温度が高温である欠点を有している。また、ヒドロキシルアミンは分解しやすい欠点を有している。また、レジスト剥離の後に水洗を行った場合には水洗時にアルカリ性を呈し、微細配線加工の配線材料に多用されるアルミニウム等に対する腐食作用が強く、近年の寸法精度が厳しい微細加工には好ましくない。
近年、レジスト残渣の除去能力が高く、且つ簡便な方法としてフッ素化合物、アミド化合物、DMSO溶剤および防食剤を含む水溶液からなるレジスト剥離液組成物が使用されている(特開平8−202052号、特開平11−067632号)。これらのフッ素化合物を含むレジスト剥離液組成物はアルカリ性剥離液に比べ水洗時の腐蝕作用は小さい。しかし、近年の半導体プロセスの進歩は早く、微細配線加工の配線材料にとっては更なる腐蝕の低減が求められるようになってきた。とくに絶縁材料として使用されるシリコン酸化物の類似体としてのTEOS,HSQといわれる有機シリコン酸化物の腐食を抑えることが求められている。
【0003】
【発明が解決しようとする課題】
以上の如く、ICやLSI等の半導体素子や液晶パネル素子の配線工程におけるドライエッチング、アツシング後に残存するレジスト残渣物を、低温、短時間で完全に除去でき、且つ材質の腐蝕の少ないレジスト用剥離液組成物を提供することである。
【0004】
【課題を解決するための手段】
本発明者等は、上記従来技術における種々の問題点を解決すべく鋭意検討を行った結果、ドライエッチング、アツシング後に残存するレジスト残渣物を剥離する際、フッ素化合物、環状カルバミン酸エステルの溶媒と水から成ることを特徴とするレジスト剥離液組成物を使用することにより材質を腐食することなく、極めて容易に剥離できることを見出し、本発明を完成するに至った。すなわち、本発明は、フッ素化合物と環状カルバミン酸エステルと水から成るレジスト剥離液組成物に関する。
【0005】
【発明の実施の形態】
本発明に使用されるフッ素化合物は、アンモニウム、有機アミンまたは有機アンモニウムのフッ化物塩、例えば、フッ化アンモニウム、フッ化水素酸、酸性フツ化アンモニウム、メチルアミンフッ化水素塩、エチルアミンフッ化水素塩、プロビルアミンフツ化水素塩、フッ化テトラメチルアンモニウム、フッ化テトラエチルアンモニウム、エタノールアミンフッ化水素塩、メチルエタノールアミンフッ化水素塩、ジメチルエタノールアミンフッ化水素塩、ヒドロキシルアミンフッ化水素塩、ジメチルヒドロキシルアミンフッ化水素塩、トリエチレンジアミンフッ化水素塩等が挙げられる。これらのフッ素化合物の中で好ましくは、フッ化アンモニウム、酸性フッ化アンモニウム、フッ酸であり、より好ましくはフッ化アンモニウムである。これらフッ素化合物を単独、もしくは混合して使用しても何ら支障ない。フッ素化合物は、全組成物中0.001〜10重量%の濃度範囲で使用される。
【0006】
本発明の組成物には、フッ素化合物と共存して15〜98重量%の環状カルバミン酸を含む。好ましい環状カルバミン酸エステルは、下記式(1)で示される化合物である。
【0007】
【化2】
さらに好ましくは式(1)中の、Rl=メチル基、R2およびR3=Hである化合物である。
通常の非環状カルバミン酸エステルは加水分解しやすく、安定な化合物ではないが、本発明の環状カルバミン酸エステルは環状構造のため、加水分解しにくく、水やフッ素化合物と混合するのに適している。環状カルバミン酸の含有量は好ましくは25〜98重量%である。
【0008】
通常の炭酸エステルは水溶性が低く、単純な尿素化合物はレジスト剥離性に乏しく、固体であるが、本発明の環状カルバミン酸エステルは炭酸エステル、尿素の欠点を無くした化合物である。
【0009】
本発明ではフッ素化合物、環状カルバミン酸エステルおよび水と、混和可能な水溶性有機溶剤を添加することができる。混和可能な水溶性有機溶剤であれば特に制限を受けない。
人手しやすく安価な水溶性有機溶剤としてはN,N−ジメチルホルムアミド、N,N−ジメチルアセトアミド、N−メチルアセトアミド、ジメチルスルホキシド、スルホラン、ヘキサメチルリン酸トリアミド、ホルムアミド、N−メチルホルムアミド、アセトアミド、N−メチルピロリドン、N,N−ジエチルホルムアミド、N,N’−ジメチルエチレン尿素,N,N’−ジメチルプロピレン尿素、テトラメチル尿素、ジメチルカルバミン酸メチル、アセトニトリル、ラクトアミド、ヒドロキシ酪酸アミド、2−ピロリドン、N−メチルプロピオンアミド、ジメチルプロピルアミド、ジエチレングリコール、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノブチルエーテル、プロピレングリコールモノメチルエーテル、ジプロピレングリコール、ジプロピレングリコールモノメチルエーテル、エチレングリコール、プロピレングリコール等が挙げられる。水溶性有機溶剤は除去性、腐食性を勘案して加えればよい。
水溶性有機溶媒の含有量は0〜70重量%である。水溶性有機溶剤をさらに添加することで環状カルバミン酸エステルのみではコントロールしにくい剥離性、腐食性を容易に変化させることができる。
組成物中の全有機溶剤量が40%以上である場合、溶剤効果による機能が大きく現れる。
【0010】
本発明の環状カルバミン酸エステルはエステル部分とアミド部分を共に有する化合物で通常の非プロトン性のアミド系溶剤と異なる性能を有している。本発明の環状カルバミン酸エステルはアミド系溶剤と異なり、シリコン酸化物の腐食性が小さい利点を有している。
【0011】
発明で用いられる水の濃度は制限が無く、フッ素化合物、水溶性有機溶剤、環状カルバミン酸エステル溶媒の濃度を勘案して、残部として添加される。
【0012】
本発明のレジスト剥離液組成物を使用してレジスト残渣物を除去する際、通常は常温で充分であるが、必要に応じて適宜、加熱する。
【0013】
本発明のレジスト剥離液組成物に、糖類、糖アルコール、ポリフェノール類、第4級アンモニウム塩等の基板の防食剤を添加することも、何等差し支えない。糖類としてはフルクトース、グルコース、ガラクトースソルポース等、糖アルコールとしてはソルビトール、キシリトール、エリスリトール等、ポリフェノール類としてはガロタンニン、エラグタンニン、カテキン、プロアントシアン等、第4級アンモニウム塩としてはテロラメチルアンモニウムハイドロオキサイド、テトラメチルアンモニウムカーボネート、テトラメチルアンモニウムフオルメート等があげられる。また、防食剤として芳香族ヒドロキシ化合物、カルボキシル基含有有機化合物、カルポキシル基含有有機化合物の有機塩化合物、キレート化合物も本発明のレジスト剥離液組成物に加えることは何ら差し支えない。芳香族ヒドロキシ化合物としてはカテコール、t−プチルカテコール、フェノール、ピロガロール等があげられる。カルポキシル基含有有機化合物としては蟻酸、酢酸、プロピオン酸、酪酸、イソ酪酸、シュウ酸、マロン酸、コハク酸、グルタル酸、マレイン酸、フマル酸、安息香酸、フタル酸、1,2,3−ベンゼントリカルボン酸、グリコール酸、乳酸、リンゴ酸、クエン酸、無水酢酸、無水フタル酸、無水マレイン酸、無水コハク酸、サリチル酸等があげられる。カルボキシル基含有有機化合物の有機塩化合物としては、上記カルボキシル基含有有機化合物とエタノールアミン、トリメチルアミン、ジエチルアミン、ピリジン等の塩基物質から作られる有機塩化合物があげられる。キレート化合物としては、1,2−プロパンジアミンテトラメチレンホスホン酸、ヒドロキシエタンホスホン酸等の燐酸系、エチレンジアミン四酢酸、ジヒドロキシエチルグリシン、ニトリロ三酢酸等のカルボン酸系、ビビリジン、テトラフエニルポルフイリン、フエナントロリン等のアミン系、ジメチルグリオキシム、ジフエニルグリオキシム等のオキシム系キレート化合物、ペンゾトリアゾール、アミノテトラゾールのアゾール系があげられる。これらの化合物の単独、又は2種以上を組み合わせて配合できる。
【0014】
本発明のレジスト剥離液組成物に、カチオン系、アニオン系、ノニオン系の様な界面活性剤を添加することは、何等差し支えなく、好適に使用される。
本発明の半導体素子を製造する方法は、基板上に設けられた導電薄膜上に所定のパターンをレジストで形成した後、レジストをマスク材として、前記導電薄膜をエッチング加工し、次いでエッチング後に残存するレジスト残渣物を上記レジスト剥離液組成物を使用して除去したあと、リンスするものである。ここで、ドライエッチング後、所望により、アッシング処理を行い、しかる後に残存するレジスト残渣物を、上述した剥離液組成物で除去することもできる。
【0015】
上記リンス処理に使用するリンス液としては、メチルアルコール、エチルアルコール、イソプロパノール、ジメチルアセトアミド、ジメチルスルホキシド、グリコールエーテル、エタノールアミンN−メチルピロリドン等の水溶性有機溶剤を使用してもよく、上記の水溶性有機溶剤と超純水との混合物をリンス液として使用することも出来、また、上記水溶性有機溶剤と超純水の2液をリンス液として使用することもでき、超純水のみによるリンスを行っても良い。
【0016】
上記半導体素子の基板として、シリコン、a−シリコン、ポリシリコン、シリコン酸化膜、シリコン窒化膜、アルミニウム、アルミニウム合金、チタン、チタンータングステン、窒化チタン、タングステン、タンタル、タンタル酸化物、タンタル合金、クロム、クロム酸化物、クロム合金、ITO(インジウム、錫酸化物)等の半導体配線材料あるいはガリウムー砒素、ガリウムーリン、インジウムーリン等の化合物半導体、さらにLCDのガラス基板、ストロンチウムビスマスチタン酸等の強誘電体等が挙げられる。
【0017】
【実施例】
次に実施例により本発明を具体的に説明する。但し本発明はこれらの実施例により制限されるものではない。
【0018】
【実施例1】
半導体素子を作るために、レジスト膜をマスクとしてドライエッチングを行い、Al合金(Al−Cu)配線体を形成し、さらに酸素プラズマにより灰化処理を行った半導体装置の走査型電子顕微鏡(SEM)による観察結果を図1に示した。半導体装置はシリコン基板の上に酸化膜が形成されている。酸化膜上にバリアメタル、配線体であるAl合金が形成され、その上にバリアメタルが形成されている。配線の側壁から耳状のレジスト、配線の上にはスジ状のレジストが残っている。
この基板をフッ化アンモニウム0.1重量%、N−メチルオキサゾリジノン85重量%、水14.9重量%の組成液に室温(23−30℃)で30分浸漬した。超純水でリンスして乾燥し、電子顕微鏡(SEM)で観察を行った。
その処理後のSEHの結果を図2に示す。レジスト残渣物は完全に除去され、配線体に腐食は見られなかった。
【0019】
【実施例2〜10】
表1にレジスト剥離液組成物を用いて実施例1と同様に処理評価した結果を示した。半導体装置を表1に示す組成の剥離液に室温で所定時間浸漬した後、超純水でリンスして乾燥し、電子顕微鏡(SEM)で観察を行った。レジスト残渣の剥離状態と、アルミニウム配線体の腐食状態についての評価を行った結果を表1に示す。なお、SEM観察によるレジスト剥離評価基準は次の通りである。
A:完全に除去された。
B:少し残存物が認められた。
C:除去されていない。
配線材料のひとつであるTEOS膜のエッチングレートを併記する。
表1より、レジスト剥離を短時間で行うことができ、腐食の無い基板を得ることができることが分かる。
【0020】
【表1】
【0021】
【比較例1〜4】
実施例1と同様に行った。その結果を表2に示した。
【0022】
【表2】
【0023】
【発明の効果】
本発明により半導体素子や液晶パネル素子の配線工程における、エッチングまたはアッシング後に残存するレジスト残渣物を、低温、短時間で完全に除去でき、且つ配線材料、内部配線材料を腐食しないレジスト剥離液組成物を提供できる。
【図面の簡単な説明】
【図1】レジスト膜をマスクとしてドライエッチングを行い、Al合金(Al−Cu)配線体を形成し、さらに酸素プラズマにより灰化処理を行った後の半導体装置の状態図である。
【図2】図1の半導体装置を、レジスト剥離液組成物で処理した後の状態図である。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a resist stripping composition for use in a lithography process of a semiconductor integrated circuit, a liquid crystal panel element, a micromachine or the like, and more particularly to a resist stripping composition for removing a resist residue after etching and ashing. Things.
[0002]
[Prior art]
Conventionally, an alkaline stripper has been generally used as a stripper for removing a resist residue. As the alkaline stripper, those containing hydroxylamine are frequently used, and JP-A-7-325404 and JP-A-11-194505 disclose compositions containing alkanolamine and hydroxylamine. These resist stripping solutions have a drawback that the use temperature is high. Also, hydroxylamine has a disadvantage that it is easily decomposed. In addition, when the substrate is washed with water after the resist is peeled off, it exhibits alkalinity at the time of washing, has a strong corrosive effect on aluminum or the like frequently used as a wiring material for fine wiring processing, and is not preferable for recent fine processing in which dimensional accuracy is severe.
In recent years, a resist stripping solution composition comprising an aqueous solution containing a fluorine compound, an amide compound, a DMSO solvent and an anticorrosive has been used as a simple method having a high ability to remove resist residues (Japanese Patent Application Laid-Open No. 8-202052, Kaihei 11-066762). The resist stripping composition containing such a fluorine compound has a smaller corrosive action when washed with water than the alkaline stripping solution. However, progress in semiconductor processes in recent years has been rapid, and wiring materials for fine wiring processing have been required to further reduce corrosion. In particular, it is required to suppress the corrosion of organic silicon oxides called TEOS and HSQ as analogs of silicon oxide used as an insulating material.
[0003]
[Problems to be solved by the invention]
As described above, resist residues remaining after dry etching and asshing in the wiring process of semiconductor elements such as ICs and LSIs and liquid crystal panel elements can be completely removed at a low temperature and in a short time, and the resist is peeled off with little corrosion of the material. It is to provide a liquid composition.
[0004]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to solve the various problems in the prior art described above, and as a result of dry etching, when stripping the resist residue remaining after assing, a fluorine compound, a solvent of cyclic carbamate and The present inventors have found that the use of a resist stripper composition characterized by being made of water allows the stripper to be stripped off very easily without corroding the material, thereby completing the present invention. That is, the present invention relates to a resist stripping composition comprising a fluorine compound, a cyclic carbamate and water.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
The fluorine compound used in the present invention is ammonium, an organic amine or a fluoride salt of an organic ammonium, for example, ammonium fluoride, hydrofluoric acid, ammonium ammonium fluoride, methylamine hydrofluoride, ethylamine hydrofluoride. , Propylamine hydrofluoride, tetramethylammonium fluoride, tetraethylammonium fluoride, ethanolamine hydrofluoride, methylethanolamine hydrofluoride, dimethylethanolamine hydrofluoride, hydroxylamine hydrofluoride, Examples thereof include dimethylhydroxylamine hydrofluoride and triethylenediamine hydrofluoride. Among these fluorine compounds, ammonium fluoride, ammonium acid fluoride and hydrofluoric acid are preferred, and ammonium fluoride is more preferred. It does not matter at all if these fluorine compounds are used alone or in combination. The fluorine compound is used in a concentration range of 0.001 to 10% by weight in the whole composition.
[0006]
The composition of the present invention contains 15 to 98% by weight of cyclic carbamic acid in the presence of a fluorine compound. Preferred cyclic carbamates are compounds represented by the following formula (1).
[0007]
Embedded image
Further preferred are compounds of the formula (1) wherein R1 = methyl group, R2 and R3 = H.
Ordinary acyclic carbamates are easily hydrolyzed and are not stable compounds, but the cyclic carbamates of the present invention are not easily hydrolyzed due to their cyclic structure and are suitable for mixing with water or fluorine compounds. . The content of cyclic carbamic acid is preferably 25 to 98% by weight.
[0008]
Ordinary carbonates have low water solubility and simple urea compounds have poor resist stripping properties and are solids, but the cyclic carbamate of the present invention is a compound which eliminates the disadvantages of carbonates and urea.
[0009]
In the present invention, a water-soluble organic solvent miscible with a fluorine compound, a cyclic carbamate and water can be added. There is no particular limitation as long as it is a miscible water-soluble organic solvent.
N, N-dimethylformamide, N, N-dimethylacetamide, N-methylacetamide, dimethylsulfoxide, sulfolane, hexamethylphosphoric triamide, formamide, N-methylformamide, acetamide; N-methylpyrrolidone, N, N-diethylformamide, N, N'-dimethylethyleneurea, N, N'-dimethylpropyleneurea, tetramethylurea, methyl dimethylcarbamate, acetonitrile, lactamide, hydroxybutyamide, 2-pyrrolidone , N-methylpropionamide, dimethylpropylamide, diethylene glycol, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, B propylene glycol, dipropylene glycol monomethyl ether, ethylene glycol, propylene glycol, and the like. The water-soluble organic solvent may be added in consideration of removability and corrosiveness.
The content of the water-soluble organic solvent is 0 to 70% by weight. By further adding a water-soluble organic solvent, the releasability and the corrosiveness, which are difficult to control only with the cyclic carbamate, can be easily changed.
When the total amount of the organic solvent in the composition is 40% or more, the function due to the solvent effect appears largely.
[0010]
The cyclic carbamate of the present invention is a compound having both an ester moiety and an amide moiety, and has performance different from that of a general aprotic amide solvent. The cyclic carbamate of the present invention has an advantage that silicon oxide is less corrosive, unlike amide solvents.
[0011]
The concentration of water used in the present invention is not limited, and is added as the balance in consideration of the concentrations of the fluorine compound, the water-soluble organic solvent, and the cyclic carbamic acid ester solvent.
[0012]
At the time of removing the resist residue using the resist stripping composition of the present invention, normal temperature is usually sufficient, but heating is appropriately performed as necessary.
[0013]
The anticorrosive for the substrate such as saccharides, sugar alcohols, polyphenols, and quaternary ammonium salts may be added to the resist stripping composition of the present invention. Sugars include fructose, glucose, galactose sorbose, etc., sugar alcohols include sorbitol, xylitol, erythritol, etc., polyphenols such as gallotannin, ellagtannin, catechin, proanthocyan, etc .; , Tetramethylammonium carbonate, tetramethylammonium formate and the like. An aromatic hydroxy compound, a carboxyl group-containing organic compound, an organic salt compound of a carboxyl group-containing organic compound, and a chelate compound may be added to the resist stripping composition of the present invention as an anticorrosive. As the aromatic hydroxy compound, catechol, t-butyl catechol, phenol, pyrogallol and the like can be mentioned. Examples of the carboxyl group-containing organic compound include formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, maleic acid, fumaric acid, benzoic acid, phthalic acid, 1,2,3-benzene Tricarboxylic acid, glycolic acid, lactic acid, malic acid, citric acid, acetic anhydride, phthalic anhydride, maleic anhydride, succinic anhydride, salicylic acid and the like. Examples of the organic salt compound of the carboxyl group-containing organic compound include an organic salt compound formed from the above carboxyl group-containing organic compound and a basic substance such as ethanolamine, trimethylamine, diethylamine, and pyridine. Examples of the chelating compound include 1,2-propanediaminetetramethylenephosphonic acid, phosphoric acid such as hydroxyethanephosphonic acid, ethylenediaminetetraacetic acid, dihydroxyethylglycine, carboxylic acid such as nitrilotriacetic acid, biviridine, tetraphenylporphyrin, Examples thereof include amines such as phenanthroline, oxime-based chelate compounds such as dimethylglyoxime and diphenylglyoxime, and azoles such as benzotriazole and aminotetrazole. These compounds can be used alone or in combination of two or more.
[0014]
The addition of a surfactant such as a cationic, anionic or nonionic surfactant to the resist stripping composition of the present invention can be suitably used without any problem.
In the method for manufacturing a semiconductor device of the present invention, after a predetermined pattern is formed on a conductive thin film provided on a substrate with a resist, the resist is used as a mask material, the conductive thin film is etched, and then left after etching. The resist residue is removed by using the above-mentioned resist stripping composition, and then rinsed. Here, after the dry etching, an ashing treatment may be performed if desired, and the resist residue remaining after that may be removed with the above-mentioned stripping solution composition.
[0015]
As the rinsing liquid used in the rinsing treatment, a water-soluble organic solvent such as methyl alcohol, ethyl alcohol, isopropanol, dimethylacetamide, dimethyl sulfoxide, glycol ether, ethanolamine N-methylpyrrolidone, or the like may be used. A mixture of a water-soluble organic solvent and ultrapure water can be used as a rinsing liquid, and a mixture of the above water-soluble organic solvent and ultrapure water can be used as a rinsing liquid. May be performed.
[0016]
As the substrate of the semiconductor element, silicon, a-silicon, polysilicon, silicon oxide film, silicon nitride film, aluminum, aluminum alloy, titanium, titanium-tungsten, titanium nitride, tungsten, tantalum, tantalum oxide, tantalum alloy, chromium Semiconductor wiring materials such as chromium oxide, chromium alloy, ITO (indium, tin oxide) or compound semiconductors such as gallium-arsenide, gallium-phosphorus, indium-phosphorus, etc .; No.
[0017]
【Example】
Next, the present invention will be specifically described with reference to examples. However, the present invention is not limited by these examples.
[0018]
Embodiment 1
In order to manufacture a semiconductor element, a scanning electron microscope (SEM) of a semiconductor device in which dry etching is performed using a resist film as a mask, an Al alloy (Al-Cu) wiring body is formed, and ashing is performed by oxygen plasma. FIG. 1 shows the results of the observation. In a semiconductor device, an oxide film is formed on a silicon substrate. A barrier metal and an Al alloy as a wiring body are formed on the oxide film, and a barrier metal is formed thereon. An ear-shaped resist remains from the side wall of the wiring, and a streak-shaped resist remains on the wiring.
This substrate was immersed in a composition liquid containing 0.1% by weight of ammonium fluoride, 85% by weight of N-methyloxazolidinone and 14.9% by weight of water at room temperature (23-30 ° C.) for 30 minutes. It was rinsed with ultrapure water, dried, and observed with an electron microscope (SEM).
FIG. 2 shows the results of SEH after the processing. The resist residue was completely removed, and no corrosion was observed on the wiring body.
[0019]
Embodiments 2 to 10
Table 1 shows the results of the process evaluation using the resist stripping composition in the same manner as in Example 1. The semiconductor device was immersed in a stripper having the composition shown in Table 1 at room temperature for a predetermined time, rinsed with ultrapure water, dried, and observed with an electron microscope (SEM). Table 1 shows the results of the evaluation of the stripped state of the resist residue and the corrosion state of the aluminum wiring body. The evaluation criteria for resist peeling by SEM observation are as follows.
A: Completely removed.
B: A little residue was observed.
C: Not removed.
The etching rate of the TEOS film which is one of the wiring materials is also described.
Table 1 shows that the resist can be stripped in a short time and a substrate free of corrosion can be obtained.
[0020]
[Table 1]
[0021]
[Comparative Examples 1-4]
Performed in the same manner as in Example 1. The results are shown in Table 2.
[0022]
[Table 2]
[0023]
【The invention's effect】
According to the present invention, a resist stripping solution composition that can completely remove a resist residue remaining after etching or ashing in a wiring step of a semiconductor element or a liquid crystal panel element at a low temperature and in a short time and does not corrode a wiring material or an internal wiring material. Can be provided.
[Brief description of the drawings]
FIG. 1 is a state diagram of a semiconductor device after performing dry etching using a resist film as a mask, forming an Al alloy (Al—Cu) wiring body, and further performing an ashing process using oxygen plasma.
FIG. 2 is a state diagram after the semiconductor device of FIG. 1 is treated with a resist stripper composition.
Claims (7)
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2004019134A1 (en) * | 2002-08-22 | 2005-12-15 | ダイキン工業株式会社 | Stripping solution |
KR100690347B1 (en) * | 2005-04-09 | 2007-03-09 | 주식회사 엘지화학 | Stripping solution composition, stripping method using the same and stripping device thereof |
JP2012518715A (en) * | 2009-02-25 | 2012-08-16 | アバントール パフォーマンス マテリアルズ, インコーポレイテッド | Multipurpose microelectronic cleaning compositions based on acidic, organic solvents |
JP6160893B1 (en) * | 2016-09-30 | 2017-07-12 | パナソニックIpマネジメント株式会社 | Resist stripper |
-
2002
- 2002-07-11 JP JP2002203250A patent/JP2004045774A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2004019134A1 (en) * | 2002-08-22 | 2005-12-15 | ダイキン工業株式会社 | Stripping solution |
KR100690347B1 (en) * | 2005-04-09 | 2007-03-09 | 주식회사 엘지화학 | Stripping solution composition, stripping method using the same and stripping device thereof |
JP2012518715A (en) * | 2009-02-25 | 2012-08-16 | アバントール パフォーマンス マテリアルズ, インコーポレイテッド | Multipurpose microelectronic cleaning compositions based on acidic, organic solvents |
JP6160893B1 (en) * | 2016-09-30 | 2017-07-12 | パナソニックIpマネジメント株式会社 | Resist stripper |
WO2018061064A1 (en) * | 2016-09-30 | 2018-04-05 | パナソニックIpマネジメント株式会社 | Resist removal liquid |
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