JP2019518986A - 半導体基板からフォトレジストを除去するための剥離組成物 - Google Patents
半導体基板からフォトレジストを除去するための剥離組成物 Download PDFInfo
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- JP2019518986A JP2019518986A JP2018560013A JP2018560013A JP2019518986A JP 2019518986 A JP2019518986 A JP 2019518986A JP 2018560013 A JP2018560013 A JP 2018560013A JP 2018560013 A JP2018560013 A JP 2018560013A JP 2019518986 A JP2019518986 A JP 2019518986A
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- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 150000005622 tetraalkylammonium hydroxides Chemical class 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical compound OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 description 1
- 125000003831 tetrazolyl group Chemical group 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- QVOFCQBZXGLNAA-UHFFFAOYSA-M tributyl(methyl)azanium;hydroxide Chemical compound [OH-].CCCC[N+](C)(CCCC)CCCC QVOFCQBZXGLNAA-UHFFFAOYSA-M 0.000 description 1
- 235000013337 tricalcium citrate Nutrition 0.000 description 1
- DWBDUFAECGEQOS-UHFFFAOYSA-M triethyl(3-hydroxypropyl)azanium;hydroxide Chemical compound [OH-].CC[N+](CC)(CC)CCCO DWBDUFAECGEQOS-UHFFFAOYSA-M 0.000 description 1
- GZBUMTPCIKCWFW-UHFFFAOYSA-N triethylcholine Chemical compound CC[N+](CC)(CC)CCO GZBUMTPCIKCWFW-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- JLGLQAWTXXGVEM-UHFFFAOYSA-N triethylene glycol monomethyl ether Chemical compound COCCOCCOCCO JLGLQAWTXXGVEM-UHFFFAOYSA-N 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- ZMEFBTCKVCNTBG-UHFFFAOYSA-M trimethyl(pentyl)azanium;hydroxide Chemical compound [OH-].CCCCC[N+](C)(C)C ZMEFBTCKVCNTBG-UHFFFAOYSA-M 0.000 description 1
- HADKRTWCOYPCPH-UHFFFAOYSA-M trimethylphenylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C1=CC=CC=C1 HADKRTWCOYPCPH-UHFFFAOYSA-M 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
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- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
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- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
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- C11D3/16—Organic compounds
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- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
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- C11D3/26—Organic compounds containing nitrogen
- C11D3/28—Heterocyclic compounds containing nitrogen in the ring
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- C11D3/26—Organic compounds containing nitrogen
- C11D3/30—Amines; Substituted amines ; Quaternized amines
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- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/34—Organic compounds containing sulfur
- C11D3/3427—Organic compounds containing sulfur containing thiol, mercapto or sulfide groups, e.g. thioethers or mercaptales
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- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/43—Solvents
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- 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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
- G03F7/423—Stripping or agents therefor using liquids only containing mineral acids or salts thereof, containing mineral oxidizing substances, e.g. peroxy compounds
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- G03F7/26—Processing photosensitive materials; Apparatus therefor
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- G03F7/26—Processing photosensitive materials; Apparatus therefor
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- H01L21/3105—After-treatment
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Abstract
Description
1)少なくとも1種の水溶性極性非プロトン性有機溶剤;
2)少なくとも1種の水酸化第四級アンモニウム;
3)少なくとも3つの水酸基を含む少なくとも1種の化合物;
4)少なくとも1種のカルボン酸;
5)少なくとも1種のII族金属カチオン;
6)6−置換−2,4−ジアミノ−1,3,5−トリアジンからなる群から選択される少なくとも1種の銅腐食抑制剤;及び
7)水。
本明細書において、別途記述されていない限り、表示されている全ての百分率は、剥離組成物の全重量に対する重量百分率であると理解されるべきである。別途記述されていない限り、周囲温度は、摂氏約16度から約27度(℃)の間であると定義される。
1)少なくとも1種の水溶性極性非プロトン性有機溶剤;
2)少なくとも1種の水酸化第四級アンモニウム;
3)少なくとも3つの水酸基を含む少なくとも1種の化合物;
4)少なくとも1種のカルボン酸;
5)少なくとも1種のII族金属カチオン;
6)6−置換−2,4−ジアミノ−1,3,5−トリアジンからなる群から選択される少なくとも1種の銅腐食抑制剤;及び
7)水。
(A)フォトレジストコーティングまたはフォトレジスト残渣を有する半導体基板を提供すること;
(B)前記半導体基板を本明細書に記載の剥離組成物と接触させて、フォトレジストコーティングまたはフォトレジスト残渣を除去すること;
(C)前記半導体基板を適切なリンス溶剤でリンスすること;及び
(D)場合により、前記リンス溶剤を除去しかつ半導体基板の完全性を損なわないいずれかの適切な手段によって前記半導体基板を乾燥させること、を含む。いくつかの実施形態では、前記剥離方法は、上述の方法によって得られた半導体基板から半導体デバイス(例えば、半導体チップなどの集積回路デバイス)を形成することをさらに含む。
剥離組成物を、有機溶剤および超純粋脱イオン水(DIW)を撹拌しながら混合することによって調製した。水性(25%)TMAHを撹拌しながらゆっくりと添加し、続いてCu抑制剤を添加した。均一な溶液を得た後、残りの成分を添加し、続いて、使用される場合には任意成分を添加した。使用した全ての成分は商業的に入手可能であり、高純度であった。
剥離試験は、カスタマー供給の200mmまたは300mmのフルウェーハを用いて行った。厚膜ポジ型またはネガ型レジストを有するカスタマー供給ウェーハを、剥離試験用の一体型ダイを含む小さなクーポンにダイシングした。試料を、約200mLの本開示の剥離組成物を含む600mL容量のガラスビーカーに入れた。試料を剥離組成物に浸漬する前に、制御された溶液撹拌のために約250rpmに設定されたホットプレート上で、剥離組成物を試験条件温度(典型的には50℃〜80℃)に予熱した。次いで、デバイス側が撹拌棒に「向かい合う」状態で予熱した剥離組成物に試料を入れ、一定に撹拌しながら溶液中に試料を試験条件時間(典型的には0.5〜10分間)にわたって放置することによって、剥離試験を実施した。試料を試験条件の持続時間にわたって溶液中に曝露したら、一対のプラスチックの「固定」ピンセットを用いて試料を試験溶液から迅速に取り出し、周囲温度(約17℃)において、約500mLの超高純度脱イオン水で満たした600mLプラスチックビーカーに入れた。試料を脱イオン水のビーカーにおいて約10〜20秒間、穏やかに撹拌しながら放置し、次いで、取り出し、さらに40〜50秒間、周囲温度で超高純度脱イオン水流(流速〜2L/分)下に置き、次いで取り出した。取り出したら、試料を手持ち式窒素吹き付けガンからの窒素ガスに直ちに曝露して試料表面上の液滴を試料から吹き飛ばし、さらに試料デバイスの表面および裏側を完全に乾燥させた。この最終窒素乾燥工程に続いて、試料をプラスチックピンセットホルダーから取り出し、被覆されたプラスチックキャリヤ内にデバイス側を上にして入れ、約2時間以下の短い期間保存した。次いで、剥離試験試料デバイス表面における主要な特徴部(すなわち、SnAg/Niバンプ)について、走査型電子顕微鏡(SEM)画像を収集した。
試験した剥離組成物の腐食性を決定するために、種々の基板材料のエッチング速度を測定した。試験されるフォトレジスト材料のコーティングを有するウェーハからのクーポン(Cu、Al、W、Ni、Sn、Co、シリコン窒化物、またはポリ−Si)を、試験条件温度に予熱されたある特定の体積の試験剥離組成物に浸漬した。試験条件時間の持続時間にわたって試験剥離組成物中に浸漬した後、一対のプラスチック「固定」ピンセットを用いて試験組成物からクーポンを迅速に取り出し、脱イオン水でリンスし、N2ガス流によって吹き付け乾燥した。
表1のデータは、本開示の組成物に対する糖アルコールグリセロールの効果の2つの局面を例示する。第一に、CE−1(グリセロール非含有)と比較して、FE−1〜FE−3は、Caのアルカリ性半水性製剤への溶解をグリセロールが助けることを示している。グリセロールを組成に含めると、透明な組成物が生じ、一方、CE−1では未溶解の白色粉末が観察される。第二に、グリセロール濃度が増加するにつれて、Alエッチング耐性の改善(すなわち、Alエッチング速度の減少)が観察される。
MMB = 3−メトキシ−3−メチル−ブタノール
TMAH =水酸化テトラメチルアンモニウム
MD−20 =アセチレン系界面活性剤
DIW =脱イオン水
TSV =シリコンバイアス(through silicon vias)
本開示の組成をさらに詳述するために、さらなる組成物を表6に記載する。
Claims (31)
- 1)少なくとも1種の水溶性極性非プロトン性有機溶剤;
2)少なくとも1種の水酸化第4級アンモニウム;
3)少なくとも3つの水酸基を含む少なくとも1種の化合物;
4)少なくとも1種のカルボン酸;
5)少なくとも1種のII族金属カチオン;
6)6−置換−2,4−ジアミノ−1,3,5−トリアジンからなる群より選択される少なくとも1種の銅腐食抑制剤;及び
7) 水
を含む組成物。 - 前記少なくとも1種の水酸化第4級アンモニウムが、式[NR1R2R3R4]+OH(式中、R1、R2、R3、およびR4はそれぞれ独立して、ヒドロキシ基によって置換されていてもよい線状、分岐状、もしくは環状のアルキル基、置換もしくは非置換のフェニル基、または置換もしくは非置換のベンジル基である)で表される化合物を含む、請求項1に記載の組成物。
- R1、R2、R3、およびR4は、それぞれ独立して、C1〜C4アルキル基、ヒドロキシエチル基、フェニル基、またはベンジル基である、請求項2に記載の組成物。
- 前記少なくとも1種の水酸化第4級アンモニウムを約0.1重量%〜約10重量%含む、請求項1に記載の組成物。
- 前記少なくとも1種の銅腐食抑制剤は、2,4−ジアミノ−1,3,5−トリアジンの6位上の置換基が、直鎖または分枝鎖である置換または非置換のC1−C12アルキル基、置換または非置換のC3−C12シクロアルキル基、置換もしくは無置換のアリール基、−SCH2R100、−N(R100R101)、又はイミジル(ここでR100及びR101は、それぞれ独立に、直鎖もしくは分枝鎖である、置換もしくは非置換の、窒素原子もしくは酸素原子をアルキル鎖中に含んでいてもよいC1−C12アルキル基であるか、置換もしくは非置換の、窒素原子もしくは酸素原子をシクロアルキル環中に含んでいてもよいC3−C12シクロアルキル基であるか、置換もしくは非置換のアリール基であるか、またはR100及びR101はそれらが結合している原子と共に環を形成する)である、6−置換−2,4−ジアミノ−1,3,5−トリアジンを含む、請求項1に記載の組成物。
- 前記少なくとも1種の銅腐食抑制剤が、6−フェニル−2,4−ジアミノ−1,3,5−トリアジンまたは6−メチル−2,4−ジアミノ−1,3,5−トリアジンを含む、請求項1に記載の組成物。
- 前記少なくとも1種の銅腐食抑制剤を約0.1重量%〜約10重量%含む、請求項1に記載の組成物。
- 前記少なくとも1種の水溶性極性非プロトン性有機溶剤が、ジメチルスルホキシド、スルホラン、ジメチルスルホン、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−メチルピロリドン、ガンマ−ブチロラクトン、プロピレンカーボネート、1,3−ジメチル−2−イミダゾリジノン、またはこれらの混合物を含む、請求項1に記載の組成物。
- 前記少なくとも1種の水溶性極性非プロトン性有機溶剤を約30重量%〜約90重量%含む、請求項1に記載の組成物。
- 少なくとも1種のアルコール溶剤をさらに含む、請求項1に記載の組成物。
- 前記少なくとも1種のアルコール溶剤が、アルカンジオール、グリコール、アルコキシアルコール、飽和脂肪族一価アルコール、不飽和非芳香族一価アルコール、環構造を含むアルコール、またはこれらの混合物を含む、請求項10に記載の組成物。
- 前記少なくとも1種のアルコール溶剤を約5重量%〜約60重量%含む、請求項10に記載の組成物。
- 前記水を約2.5重量%〜約25重量%含む、請求項1に記載の組成物。
- 少なくとも1種の脱泡界面活性剤をさらに含む、請求項1に記載の組成物。
- 前記少なくとも1種の脱泡界面活性剤を約0.01重量%〜約3重量%含む、請求項14に記載の組成物。
- 前記少なくとも3つの水酸基を含む少なくとも1種の化合物が、糖アルコールを含む、請求項1に記載の組成物。
- 前記糖アルコールが、グリセロール、ソルビトール、マンニトール、エリスリトール、アラビトール、イソマルト、ラクチトール、マルチトール、キシリトール、トレイトール、リビトール、ガラクチトール、イジトールまたはイノシトールである、請求項16に記載の組成物。
- 前記糖アルコールがグリセロールまたはソルビトールである、請求項16に記載の組成物。
- 前記少なくとも3つの水酸基を含む少なくとも1種の化合物を約0.1重量%〜約10重量%含む、請求項16に記載の組成物。
- 前記少なくとも1種のカルボン酸が、モノカルボン酸、ジカルボン酸、トリカルボン酸、α−ヒドロキシ酸であるモノカルボン酸、β−ヒドロキシ酸であるモノカルボン酸、α−ヒドロキシ酸であるジカルボン酸、β−ヒドロキシ酸であるジカルボン酸、α−ヒドロキシ酸であるトリカルボン酸、およびβ−ヒドロキシ酸であるトリカルボン酸からなる群より選択される、請求項1に記載の組成物。
- 前記少なくとも1種のカルボン酸が、クエン酸、マレイン酸、フマル酸、乳酸、グリコール酸、シュウ酸、酒石酸、コハク酸または安息香酸を含む、請求項20に記載の組成物。
- 前記少なくとも1種のカルボン酸が、クエン酸を含む、請求項21に記載の組成物。
- 前記少なくとも1種のカルボン酸を約0.1重量%〜約1.5重量%含む、請求項1に記載の組成物。
- 前記少なくとも1種のII族金属カチオンが、Mg2+、Ca2+、Sr2+、またはBa2+を含む、請求項1に記載の組成物。
- 前記少なくとも1種のII族金属カチオンが、Ca2+を含む、請求項1に記載の組成物。
- 前記少なくとも1種のII族金属カチオンを約5ppm〜約40ppm含む、請求項1に記載の組成物。
- 約13以上のpHを有する、請求項1に記載の組成物。
- フォトレジストまたはフォトレジスト残渣を含む半導体基板を、請求項1〜請求項27のいずれか1項に記載の組成物と接触させて、前記フォトレジストまたはフォトレジスト残渣を除去することを含む方法。
- 前記接触工程の後、前記半導体基板をリンス溶剤でリンスすることをさらに含む、請求項28に記載の方法。
- 前記リンス工程の後、前記半導体基板を乾燥することをさらに含む、請求項29に記載の方法。
- 前記半導体基板中のCuまたはAlを実質的に除去しない、請求項28に記載の方法。
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