TWI776915B - 含有鹼性顯影液可溶性矽之阻劑下層膜形成組成物 - Google Patents
含有鹼性顯影液可溶性矽之阻劑下層膜形成組成物 Download PDFInfo
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- TWI776915B TWI776915B TW107123471A TW107123471A TWI776915B TW I776915 B TWI776915 B TW I776915B TW 107123471 A TW107123471 A TW 107123471A TW 107123471 A TW107123471 A TW 107123471A TW I776915 B TWI776915 B TW I776915B
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- BXYASSFFTRSIGT-UHFFFAOYSA-N trichloro-[(2-methylpropan-2-yl)oxy-phenylmethyl]silane Chemical compound CC(C)(C)OC([Si](Cl)(Cl)Cl)C1=CC=CC=C1 BXYASSFFTRSIGT-UHFFFAOYSA-N 0.000 description 1
- OUMAYXXJSADQBQ-UHFFFAOYSA-N trichloro-[2-[(2-methylpropan-2-yl)oxy]phenyl]silane Chemical compound CC(C)(C)OC1=CC=CC=C1[Si](Cl)(Cl)Cl OUMAYXXJSADQBQ-UHFFFAOYSA-N 0.000 description 1
- ZZARCDHCAFJWJC-UHFFFAOYSA-N trichloro-[ethoxy(phenyl)methyl]silane Chemical compound CCOC([Si](Cl)(Cl)Cl)C1=CC=CC=C1 ZZARCDHCAFJWJC-UHFFFAOYSA-N 0.000 description 1
- SMGOKIYLLQQVJE-UHFFFAOYSA-N trichloro-[methoxy(phenyl)methyl]silane Chemical compound COC([Si](Cl)(Cl)Cl)C1=CC=CC=C1 SMGOKIYLLQQVJE-UHFFFAOYSA-N 0.000 description 1
- UEUXEIHYBASMLX-UHFFFAOYSA-N trichloro-[phenyl(propan-2-yloxy)methyl]silane Chemical compound CC(C)OC([Si](Cl)(Cl)Cl)C1=CC=CC=C1 UEUXEIHYBASMLX-UHFFFAOYSA-N 0.000 description 1
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- RXJKFRMDXUJTEX-UHFFFAOYSA-N triethylphosphine Chemical compound CCP(CC)CC RXJKFRMDXUJTEX-UHFFFAOYSA-N 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-M triflate Chemical compound [O-]S(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-M 0.000 description 1
- JLGNHOJUQFHYEZ-UHFFFAOYSA-N trimethoxy(3,3,3-trifluoropropyl)silane Chemical compound CO[Si](OC)(OC)CCC(F)(F)F JLGNHOJUQFHYEZ-UHFFFAOYSA-N 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- IJQHYEFNLXHUGV-UHFFFAOYSA-N trimethoxysilylmethyl acetate Chemical compound CO[Si](OC)(OC)COC(C)=O IJQHYEFNLXHUGV-UHFFFAOYSA-N 0.000 description 1
- YMCDISDNGWJEGJ-UHFFFAOYSA-N triphenyl(propoxy)silane Chemical compound C=1C=CC=CC=1[Si](C=1C=CC=CC=1)(OCCC)C1=CC=CC=C1 YMCDISDNGWJEGJ-UHFFFAOYSA-N 0.000 description 1
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- 239000012498 ultrapure water Substances 0.000 description 1
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Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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Abstract
[課題] 提供一種阻劑下層膜,其可以光阻曝光後的顯影所使用的鹼性顯影液,與光阻的顯影同時使其下層存在之阻劑下層膜亦按照阻劑圖型同時除去。 [解決手段] 於上層阻劑的顯影時與該上層阻劑共同按照阻劑圖型被鹼性顯影液溶解除去之含有矽的阻劑下層膜,含有成分(a)與要素(b),該成分(a)為含有水解性矽烷、該水解物、該水解縮合物、或該等之組合之矽烷化合物,該要素(b)為對於鹼性顯影液之溶解誘發要素的微影術用阻劑下層膜形成組成物。對於鹼性顯影液之溶解誘發要素(b),為含有於上述成分(a)的化合物的構造。對於鹼性顯影液之溶解誘發要素(b)為光產酸劑。
Description
本發明係,關於為半導體裝置的製造所使用的基板與阻劑(例如,光阻、電子束阻劑)間形成下層膜的組成物。
自以往於半導體裝置的製造中,以使用光阻之微影術進行微細加工。上述微細加工於矽晶圓等之半導體基板上形成光阻薄膜,在其上介由使描繪半導體裝置圖型之遮罩圖型照射紫外線等之活性光線,經顯影處理,藉由使得到的光阻圖型作為保護膜將基板進行蝕刻處理,在基板表面,對應前述圖型形成微細凹凸的加工法。然而,近年、隨著半導體裝置之高集積化,所使用之活性光線亦有由KrF準分子雷射(248nm)轉至ArF準分子雷射(193nm)短波長化的傾向。伴隨此點,活性光線由半導體基板所產生之反射的影響已成為極大之問題。
又,作為半導體基板與光阻之間的下層膜,常使用已知作為含有矽或鈦等之金屬元素之硬遮罩的膜。該場合,在阻劑與硬遮罩,因其構成成分有很大差異,該等之藉由乾蝕刻除去的速度,大多依賴乾蝕刻所使用的氣體種類。接著,藉由適當選擇氣體種類,光阻之膜厚不會伴隨大幅減少,而硬遮罩可藉由乾蝕刻除去。如此,近年在半導體裝置的製造中,由防反射效果開始,為達成各式各樣之效果,而成為在半導體基板與光阻之間配置阻劑下層膜。接著,雖對目前為止阻劑下層膜用之組成物進行各種研究討論,但因其要求之特性的多樣性等,故仍期望開發阻劑下層膜用之新穎的材料。
自以往作為以上層阻劑之顯影液蝕刻阻劑下層膜的方法,使用溼式法的阻劑下層膜。
揭示含有具有羧酸基或羧酸形成基、與取代苯基、酯基、聚醚基、巰基、含有硫之有機官能基、羥基生成基、芳基磺酸酯基中選出之化學基的聚矽氧烷之防反射膜,可在基板的加工後以有機溶劑進行溼式除去之防反射膜(專利文獻1作為參考)。
又,揭示含有將具有2個水解性基之矽烷與具有3個水解性基之矽烷進行水解縮合而得到含有聚矽氧烷之阻劑下層膜,在基板的加工後可以有機溶劑進行溼式除去之阻劑下層膜(專利文獻2作為參考)。 [先前技術文獻] [專利文獻]
[專利文獻1]特表2012-511742號公報 [專利文獻2]特開2017-020000號公報
[發明所欲解決之問題]
本發明為,提供以光阻曝光後的顯影所使用的鹼性顯影液,與在光阻顯影時可同時將在其下層存在之阻劑下層膜亦按照阻劑圖型同時除去之阻劑下層膜者。 [用以解決問題之方法]
本發明之第1觀點為,一種微影術用阻劑下層膜形成組成物,特徵為,為形成微影術用阻劑下層膜用之組成物,該微影術用阻劑下層膜為含有矽之膜,在上層阻劑之顯影時與該上層阻劑共同按照阻劑圖型被鹼性顯影液所溶解除去的膜,前述組成物為,含有 (a)水解性矽烷、該水解物、該水解縮合物、或含有該等之組合之矽烷化合物, 更進一步,前述組成物為,含有將 (b)對於鹼性顯影液之溶解誘發要素 作為與前述成分(a)之獨立要素、或者作為前述成分(a)之化合物的構造要素。 第2觀點為,如第1觀點記載之微影術用阻劑下層膜形成組成物,其中,上述要素(b)之對於鹼性顯影液的溶解誘發要素為,含有於上述成分(a)之化合物的構造,上述成分(a)含有 (b1)式(1)所表示之水解性矽烷、該水解物、該水解縮合物、或該等之組合, 對全矽烷,含有式(1)所表示之水解性矽烷30莫耳%~100莫耳%,[式(1)中,R1
為含有酚性羥基之有機基,或含有式(1-1)、式(1-2)、式(1-3)、式(1-4)、或者式(1-5)之有機基:(式(1-1)、式(1-2)、式(1-3)、式(1-4)、及式(1-5)中,T1
、T4
及T7
各自為伸烷基、環狀伸烷基、伸烯基、伸芳基、硫原子、氧原子、氧羰基、醯胺基、2級胺基、或該等之組合,T2
為烷基或氫原子,T3
及T5
各自為脂肪族環、或芳香族環,T6
及T8
各自為內酯環。n表示1或2的整數。),且為藉由Si-C鍵結與矽原子鍵結者,為包含於前述成分(a)的化合物的構造之前述要素(b)。R2
為烷基、芳基、鹵化烷基、鹵化芳基、烯基、或具有環氧基、丙烯醯基、甲基丙烯醯基、巰基、胺基、或者氰基之有機基且藉由Si-C鍵結與矽原子鍵結者。R3
表示烷氧基、醯基氧基、或鹵素原子。a表示1的整數,b表示0或1的整數,a+b表示1或2的整數]。 第3觀點為,如第1觀點記載之阻劑下層膜形成組成物,其中,上述要素(b)之對於鹼性顯影液的溶解誘發要素為, (b2)光產酸劑, 作為上述成分(a)與上述要素(b)之混合物,對全矽烷含有上述要素(b2)為30質量%~60質量%, 第4觀點為,如第1觀點~第3觀點之任一個記載之微影術用阻劑下層膜形成組成物,其中,上述水解性矽烷為,式(1)的水解性矽烷、其他的水解性矽烷、或其組合, 其他的水解性矽烷為選自由式(2)及式(3):[(式(2)中R4
為烷基、芳基、鹵化烷基、鹵化芳基、烷氧基芳基、烷氧基烷氧基芳基、醯氧基芳基、含有酸不安定基之芳基、烯基、或具有環氧基、丙烯醯基、甲基丙烯醯基、巰基、或者氰基之有機基且為藉由Si-C鍵結與矽原子鍵結者,R5
表示烷氧基、醯基氧基、或鹵素原子,e表示0~3的整數。),及(式(3)中R6
為烷基且藉由Si-C鍵結與矽原子鍵結者,R7
表示烷氧基、醯基氧基、或鹵素原子,Y表示伸烷基或伸芳基,c表示0或1的整數,d為0或1的整數。)]所表示之有機矽化合物所構成的群中之至少1種的有機矽化合物, 第5觀點為,如第4觀點記載之微影術用阻劑下層膜形成組成物,其中,含有使第2觀點所規定之式(1)的水解性矽烷,與第4觀點所規定之式(2)的水解性矽烷之水解物作為聚合物, 第6觀點為,如第1觀點~第5觀點之任一個記載之微影術用阻劑下層膜形成組成物,其中,更進一步含有酸, 第7觀點為,如第1觀點~第6觀點之任一個記載之微影術用阻劑下層膜形成組成物,其中,更進一步含有水, 第8觀點為,一種微影術用阻劑下層膜之製造方法,含有 將第1觀點~第7觀點之任一個記載之微影術用阻劑下層膜形成組成物塗佈在於半導體基板上之步驟,以及 將上述微影術用阻劑下層膜形成組成物燒成之步驟, 第9觀點為,一種半導體裝置的製造方法,含有將第1觀點~第7觀點之任一個記載之微影術用阻劑下層膜形成組成物塗佈於半導體基板上之步驟(I), 將上述微影術用阻劑下層膜形成組成物燒成且形成微影術用阻劑下層膜之步驟(II), 在前述下層膜表面塗佈阻劑用組成物且形成阻劑膜之步驟(III), 曝光前述阻劑膜之步驟(IV), 將阻劑顯影且按照阻劑圖型以鹼性顯影液將微影術用阻劑下層膜除去而得到阻劑圖型及其轉印之阻劑圖型的步驟(V),以及 藉由圖型化之阻劑與微影術用阻劑下層膜加工半導體基板之步驟(VI), 第10觀點為,如第9觀點記載之半導體裝置的製造方法,其中,含有在(VI)步驟後,基板加工所使用之阻劑下層膜以鹼性水溶液除去之步驟, 第11觀點為,一種半導體裝置的製造方法,其特徵為, 在導體基板表面形成有機下層膜之步驟(i), 在上述有機下層膜的表面塗佈第1觀點~第7觀點之任一個記載之微影術用阻劑下層膜形成組成物之步驟(ii), 將上述微影術用阻劑下層膜形成組成物燒成且形成微影術用阻劑下層膜之步驟(iii), 在前述微影術用阻劑下層膜的表面塗佈阻劑用組成物且形成阻劑膜之步驟(iv), 將前述阻劑膜曝光之步驟(v), 曝光後將阻劑顯影且按照阻劑圖型以鹼性顯影液將微影術用阻劑下層膜除去而得到阻劑圖型及其轉印之阻劑圖型的步驟(vi), 藉由圖型化之微影術用阻劑下層膜將有機下層膜蝕刻之步驟(vii),以及 含有藉由經圖型化之有機下層膜加工半導體基板之步驟(viii),及 第12觀點為,如第11觀點記載之半導體裝置的製造方法,其中,含有在(viii)步驟後,將使用於基板加工之阻劑下層膜以鹼性水溶液除去之步驟。 [發明之效果]
以使用多層製程之微影術步驟,在光阻顯影時將其阻劑下層膜之含有矽的阻劑下層膜(矽硬遮罩層)於同時,以顯影液使圖型化之事如為可行,成為可省略自以往使用氟系氣體的乾蝕刻步驟而可將步驟簡略化。
又,在防止因氟系氣體在乾蝕刻時造成基板之損傷的觀點上,以顯影液(特別為鹼性顯影液)除去含有矽的阻劑下層膜(矽硬遮罩層)是為有用。
本發明為,以光阻曝光後的顯影所使用的鹼性顯影液,在與光阻之顯影同時將其下層存在之阻劑下層膜依照阻劑圖型同時除去之阻劑下層膜。 [實施發明之最佳形態]
為形成微影術用阻劑下層膜用之組成物,該微影術用阻劑下層膜為含有矽之膜,在上層阻劑之顯影時與該上層阻劑同時依照阻劑圖型被鹼性顯影液所溶解除去的膜,前述組成物為,包含 (a)含有水解性矽烷、該水解物、該水解縮合物、或該等之組合之矽烷化合物, 更進一步前述組成物為,具有 (b)對於鹼性顯影液之溶解誘發要素 作為與前述成分(a)的獨立要素,或者作為前述成分(a)之化合物的構造要素為特徵之微影術用阻劑下層膜形成組成物。
使曝光後的阻劑以正型顯影的場合,藉由鹼顯影將阻劑與阻劑下層膜以鹼性水溶液除去。
接著,作為任意成分,可含有酸、水、醇、硬化觸媒、酸產生劑、其他的有機聚合物、吸光性化合物、及界面活性劑等。
本發明之阻劑下層膜形成組成物中之固形分為,例如,0.1質量%~50質量%,較佳為0.1質量%~30質量%,更佳為0.1質量%~25質量%。該固形分係指由阻劑下層膜形成組成物的全成分中除去溶劑成分者。
固形分中所佔之水解性矽烷、該水解物、及該水解縮合物的比例為,20質量%以上,例如,50質量%~100質量%,較佳為60質量%~100質量%,更佳為70質量%~100質量%。
接著,亦可使用將上述的水解性矽烷、該水解物、及該水解縮合物作為該等之混合物。將水解性矽烷進行水解,得到的水解物可使用於經縮合之縮合物。得到水解縮合物時水解未完全結束之部分水解物或矽烷化合物可使用混合於水解縮合物之混合物。此縮合物為具有聚矽氧烷構造之聚合物。
上述要素(b)之對於鹼性顯影液之溶解誘發要素,為含有於上述成分(a)之化合物的構造,上述成分(a)含有 (b1)式(1)所表示之水解性矽烷、該水解物、該水解縮合物、或該等之組合, 相對全矽烷,可含有式(1)的水解性矽烷30莫耳%~100莫耳%。溶解誘發要素(b)以(b1)的場合,相對全矽烷,可含有式(1)的水解性矽烷之比例為30莫耳%~60莫耳%。
接著,上述要素(b)之對於鹼性顯影液之溶解誘發要素,以(b2)光產酸劑的場合,聚矽氧烷的單位構造中之羧基或羥基,例如與乙烯基醚化合物形成縮醛鍵結,該等於曝光時藉由自光產酸劑之酸進行分解,因聚矽氧烷所含有的構造單位以基於式(1)的水解性矽烷之構造單位100莫耳%變化,相對全矽烷,成為含有式(1)的水解性矽烷30莫耳%~100莫耳%。
本發明為(b)對於鹼性顯影液之溶解誘發要素為產生在鹼性顯影液溶解之原因的要素,有僅只基於(b1)的情形,與基於(b2)作為結果而產生(b1)之情形。僅基於(b1)的場合,相對全矽烷,可含有式(1)的水解性矽烷之比例為30莫耳%~60莫耳%,但基於(b2)作為結果,產生(b1)之場合,相對全矽烷,可含有式(1)的水解性矽烷30莫耳%~100莫耳%。
式(1)中,R1
為含有酚性羥基之有機基,或含有式(1-1)、式(1-2)、式(1-3)、式(1-4)、或式(1-5)之有機基,且為藉由Si-C鍵結與矽原子鍵結者。R2
為烷基、芳基、鹵化烷基、鹵化芳基、烯基、或具有環氧基、丙烯醯基、甲基丙烯醯基、巰基、胺基、或者氰基之有機基且藉由Si-C鍵結與矽原子鍵結者。R3
表示烷氧基、醯基氧基、或鹵素原子。a可表示1的整數,b可表示0或1的整數,a+b可表示1或2的整數。
式(1-1)、式(1-2)、式(1-3)、式(1-4)、及式(1-5)中,T1
、T4
及T7
各自為伸烷基、環狀伸烷基、伸烯基、伸芳基、硫原子、氧原子、氧羰基、醯胺基、2級胺基、或該等之組合,T2
為烷基或氫原子,T3
及T5
各自為脂肪族環,或芳香族環,T6
及T8
各自為內酯環。n可表示1或2的整數。
上述烷基為具有直鏈或分枝之碳原子數1~10的烷基,可舉例如,甲基、乙基、n-丙基、i-丙基、n-丁基、i-丁基、s-丁基、t-丁基、n-戊基、1-甲基-n-丁基、2-甲基-n-丁基、3-甲基-n-丁基、1,1-二甲基-n-丙基、1,2-二甲基-n-丙基、2,2-二甲基-n-丙基、1-乙基-n-丙基、n-己基、1-甲基-n-戊基、2-甲基-n-戊基、3-甲基-n-戊基、4-甲基-n-戊基、1,1-二甲基-n-丁基、1,2-二甲基-n-丁基、1,3-二甲基-n-丁基、2,2-二甲基-n-丁基、2,3-二甲基-n-丁基、3,3-二甲基-n-丁基、1-乙基-n-丁基、2-乙基-n-丁基、1,1,2-三甲基-n-丙基、1,2,2-三甲基-n-丙基、1-乙基-1-甲基-n-丙基及1-乙基-2-甲基-n-丙基等。
亦可使用環狀烷基,例如碳原子數1~10的環狀烷基,可舉例如,環丙基、環丁基、1-甲基-環丙基、2-甲基-環丙基、環戊基、1-甲基-環丁基、2-甲基-環丁基、3-甲基-環丁基、1,2-二甲基-環丙基、2,3-二甲基-環丙基、1-乙基-環丙基、2-乙基-環丙基、環己基、1-甲基-環戊基、2-甲基-環戊基、3-甲基-環戊基、1-乙基-環丁基、2-乙基-環丁基、3-乙基-環丁基、1,2-二甲基-環丁基、1,3-二甲基-環丁基、2,2-二甲基-環丁基、2,3-二甲基-環丁基、2,4-二甲基-環丁基、3,3-二甲基-環丁基、1-n-丙基-環丙基、2-n-丙基-環丙基、1-i-丙基-環丙基、2-i-丙基-環丙基、1,2,2-三甲基-環丙基、1,2,3-三甲基-環丙基、2,2,3-三甲基-環丙基、1-乙基-2-甲基-環丙基、2-乙基-1-甲基-環丙基、2-乙基-2-甲基-環丙基及2-乙基-3-甲基-環丙基等。
可舉例如,伸烷基為來自上述烷基之伸烷基。可舉例如,甲基時為亞甲基、乙基時為乙烯基、丙基時為伸丙基。
作為烯基,可舉例如,碳原子數2~10的烯基,乙烯基、1-丙烯基、2-丙烯基、1-甲基-1-乙烯基、1-丁烯基、2-丁烯基、3-丁烯基、2-甲基-1-丙烯基、2-甲基-2-丙烯基、1-乙基乙烯基、1-甲基-1-丙烯基、1-甲基-2-丙烯基、1-戊烯基、2-戊烯基、3-戊烯基、4-戊烯基、1-n-丙基乙烯基、1-甲基-1-丁烯基、1-甲基-2-丁烯基、1-甲基-3-丁烯基、2-乙基-2-丙烯基、2-甲基-1-丁烯基、2-甲基-2-丁烯基、2-甲基-3-丁烯基、3-甲基-1-丁烯基、3-甲基-2-丁烯基、3-甲基-3-丁烯基、1,1-二甲基-2-丙烯基、1-i-丙基乙烯基、1,2-二甲基-1-丙烯基、1,2-二甲基-2-丙烯基、1-環戊烯基、2-環戊烯基、3-環戊烯基、1-己烯基、2-己烯基、3-己烯基、4-己烯基、5-己烯基、1-甲基-1-戊烯基、1-甲基-2-戊烯基、1-甲基-3-戊烯基、1-甲基-4-戊烯基、1-n-丁基乙烯基、2-甲基-1-戊烯基、2-甲基-2-戊烯基、2-甲基-3-戊烯基、2-甲基-4-戊烯基、2-n-丙基-2-丙烯基、3-甲基-1-戊烯基、3-甲基-2-戊烯基、3-甲基-3-戊烯基、3-甲基-4-戊烯基、3-乙基-3-丁烯基、4-甲基-1-戊烯基、4-甲基-2-戊烯基、4-甲基-3-戊烯基、4-甲基-4-戊烯基、1,1-二甲基-2-丁烯基、1,1-二甲基-3-丁烯基、1,2-二甲基-1-丁烯基、1,2-二甲基-2-丁烯基、1,2-二甲基-3-丁烯基、1-甲基-2-乙基-2-丙烯基、1-s-丁基乙烯基、1,3-二甲基-1-丁烯基、1,3-二甲基-2-丁烯基、1,3-二甲基-3-丁烯基、1-i-丁基乙烯基、2,2-二甲基-3-丁烯基、2,3-二甲基-1-丁烯基、2,3-二甲基-2-丁烯基、2,3-二甲基-3-丁烯基、2-i-丙基-2-丙烯基、3,3-二甲基-1-丁烯基、1-乙基-1-丁烯基、1-乙基-2-丁烯基、1-乙基-3-丁烯基、1-n-丙基-1-丙烯基、1-n-丙基-2-丙烯基、2-乙基-1-丁烯基、2-乙基-2-丁烯基、2-乙基-3-丁烯基、1,1,2-三甲基-2-丙烯基、1-t-丁基乙烯基、1-甲基-1-乙基-2-丙烯基、1-乙基-2-甲基-1-丙烯基、1-乙基-2-甲基-2-丙烯基、1-i-丙基-1-丙烯基、1-i-丙基-2-丙烯基、1-甲基-2-環戊烯基、1-甲基-3-環戊烯基、2-甲基-1-環戊烯基、2-甲基-2-環戊烯基、2-甲基-3-環戊烯基、2-甲基-4-環戊烯基、2-甲基-5-環戊烯基、2-亞甲基-環戊基、3-甲基-1-環戊烯基、3-甲基-2-環戊烯基、3-甲基-3-環戊烯基、3-甲基-4-環戊烯基、3-甲基-5-環戊烯基、3-亞甲基-環戊基、1-環己烯基、2-環己烯基及3-環己烯基等。
作為伸烯基,可舉例如,來自上述烯基之伸烯基。
作為芳基,可舉例碳原子數6~20的芳基,可舉例如,苯基、o-甲基苯基、m-甲基苯基、p-甲基苯基、o-氯苯基、m-氯苯基、p-氯苯基、o-氟苯基、p-巰基苯基、o-甲氧基苯基、p-甲氧基苯基、p-胺基苯基、p-氰基苯基、α-萘基、β-萘基、o-聯苯基、m-聯苯基、p-聯苯基、1-蒽基、2-蒽基、9-蒽基、1-菲基、2-菲基、3-菲基、4-菲基及9-菲基。
作為伸芳基,可舉例如,來自上述芳基之伸芳基。
又,可舉例如,此等之氟、氯、溴、或碘等之鹵素原子所取代之有機基。
作為具有環氧基之有機基,可舉例如,環氧丙氧基甲基、環氧丙氧基乙基、環氧丙氧基丙基、環氧丙氧基丁基、環氧基環己基等。
作為具有丙烯醯基之有機基,可舉例如,丙烯醯基甲基、丙烯醯基乙基、丙烯醯基丙基等。
作為具有甲基丙烯醯基之有機基,可舉例如,甲基丙烯醯基甲基、甲基丙烯醯基乙基、甲基丙烯醯基丙基等。
作為具有巰基之有機基,可舉例如,乙基巰基、丁基巰基、己基巰基、辛基巰基等。
作為具有氰基之有機基,可舉例如,氰基乙基、氰基丙基等。
作為上述碳原子數1~20的烷氧基,可舉例如,具有碳原子數1~20之直鏈、分枝、環狀的烷基部分之烷氧基,可舉例如,甲氧基、乙氧基、n-丙氧基、i-丙氧基、n-丁氧基、i-丁氧基、s-丁氧基、t-丁氧基、n-戊氧基、1-甲基-n-丁氧基、2-甲基-n-丁氧基、3-甲基-n-丁氧基、1,1-二甲基-n-丙氧基、1,2-二甲基-n-丙氧基、2,2-二甲基-n-丙氧基、1-乙基-n-丙氧基、n-己氧基、1-甲基-n-戊氧基、2-甲基-n-戊氧基、3-甲基-n-戊氧基、4-甲基-n-戊氧基、1,1-二甲基-n-丁氧基、1,2-二甲基-n-丁氧基、1,3-二甲基-n-丁氧基、2,2-二甲基-n-丁氧基、2,3-二甲基-n-丁氧基、3,3-二甲基-n-丁氧基、1-乙基-n-丁氧基、2-乙基-n-丁氧基、1,1,2-三甲基-n-丙氧基、1,2,2-三甲基-n-丙氧基、1-乙基-1-甲基-n-丙氧基及1-乙基-2-甲基-n-丙氧基等,又,作為環狀的烷氧基,可舉例如,環丙氧基、環丁氧基、1-甲基-環丙氧基、2-甲基-環丙氧基、環戊氧基、1-甲基-環丁氧基、2-甲基-環丁氧基、3-甲基-環丁氧基、1,2-二甲基-環丙氧基、2,3-二甲基-環丙氧基、1-乙基-環丙氧基、2-乙基-環丙氧基、環己氧基、1-甲基-環戊氧基、2-甲基-環戊氧基、3-甲基-環戊氧基、1-乙基-環丁氧基、2-乙基-環丁氧基、3-乙基-環丁氧基、1,2-二甲基-環丁氧基、1,3-二甲基-環丁氧基、2,2-二甲基-環丁氧基、2,3-二甲基-環丁氧基、2,4-二甲基-環丁氧基、3,3-二甲基-環丁氧基、1-n-丙基-環丙氧基、2-n-丙基-環丙氧基、1-i-丙基-環丙氧基、2-i-丙基-環丙氧基、1,2,2-三甲基-環丙氧基、1,2,3-三甲基-環丙氧基、2,2,3-三甲基-環丙氧基、1-乙基-2-甲基-環丙氧基、2-乙基-1-甲基-環丙氧基、2-乙基-2-甲基-環丙氧基及2-乙基-3-甲基-環丙氧基等。
上述碳原子數2~20的醯基氧基,可舉例如,甲基羰基氧基、乙基羰基氧基、n-丙基羰基氧基、i-丙基羰基氧基、n-丁基羰基氧基、i-丁基羰基氧基、s-丁基羰基氧基、t-丁基羰基氧基、n-戊基羰基氧基、1-甲基-n-丁基羰基氧基、2-甲基-n-丁基羰基氧基、3-甲基-n-丁基羰基氧基、1,1-二甲基-n-丙基羰基氧基、1,2-二甲基-n-丙基羰基氧基、2,2-二甲基-n-丙基羰基氧基、1-乙基-n-丙基羰基氧基、n-己基羰基氧基、1-甲基-n-戊基羰基氧基、2-甲基-n-戊基羰基氧基、3-甲基-n-戊基羰基氧基、4-甲基-n-戊基羰基氧基、1,1-二甲基-n-丁基羰基氧基、1,2-二甲基-n-丁基羰基氧基、1,3-二甲基-n-丁基羰基氧基、2,2-二甲基-n-丁基羰基氧基、2,3-二甲基-n-丁基羰基氧基、3,3-二甲基-n-丁基羰基氧基、1-乙基-n-丁基羰基氧基、2-乙基-n-丁基羰基氧基、1,1,2-三甲基-n-丙基羰基氧基、1,2,2-三甲基-n-丙基羰基氧基、1-乙基-1-甲基-n-丙基羰基氧基、1-乙基-2-甲基-n-丙基羰基氧基、苯基羰基氧基、及甲苯磺醯基羰基氧基等。
作為上述鹵素原子,可舉例如,氟、氯、溴、碘等。
上述式中T為烷基,可舉上述之烷基的例示,但例如,以甲基、乙基為佳。
本發明中,水解性矽烷為,式(1)的水解性矽烷、其他的水解性矽烷、或其組合,其他的水解性矽烷,可舉例如,選自由式(2)及式(3)所構成的群中之至少1種的有機矽化合物。
式(2)中,R4
為烷基、芳基、鹵化烷基、鹵化芳基、烷氧基芳基、烷氧基烷氧基芳基、醯氧基芳基、含有酸不安定基之芳基、烯基、或具有環氧基、丙烯醯基、甲基丙烯醯基、巰基、或者氰基之有機基且藉由Si-C鍵結與矽原子鍵結者,R5
可表示烷氧基、醯基氧基、或鹵素原子,e可表示0~3的整數。此等之化學基可使用上述之例示。
式(3)中,R6
為烷基,且藉由Si-C鍵結與矽原子鍵結者,R7
可表示烷氧基、醯基氧基、或鹵素原子,Y可表示伸烷基或伸芳基,c可表示0或1的整數,d可表示0或1的整數。此等之化學基可使用上述之例示。
作為式(2)的具體例,可舉例如,四甲氧基矽烷、四氯矽烷、四乙醯氧基矽烷、四乙氧基矽烷、四n-丙氧基矽烷、四異丙氧基矽烷、四n-丁氧基矽烷、四乙醯氧基矽烷、甲基三甲氧基矽烷、甲基三氯矽烷、甲基三乙醯氧基矽烷、甲基三丙氧基矽烷、甲基三乙醯氧基矽烷、甲基三丁氧基矽烷、甲基三丙氧基矽烷、甲基三戊氧基矽烷、甲基三苯氧基矽烷、甲基三苄基氧基矽烷、甲基三苯乙基氧基矽烷、乙基三甲氧基矽烷、乙基三乙氧基矽烷、乙烯基三甲氧基矽烷、乙烯基三氯矽烷、乙烯基三乙醯氧基矽烷、乙烯基三乙氧基矽烷、乙烯基三乙醯氧基矽烷、甲氧基苯基三甲氧基矽烷、甲氧基苯基三乙氧基矽烷、甲氧基苯基三乙醯氧基矽烷、甲氧基苯基三氯矽烷、甲氧基苄基三甲氧基矽烷、甲氧基苄基三乙氧基矽烷、甲氧基苄基三乙醯氧基矽烷、甲氧基苄基三氯矽烷、甲氧基苯乙基三甲氧基矽烷、甲氧基苯乙基三乙氧基矽烷、甲氧基苯乙基三乙醯氧基矽烷、甲氧基苯乙基三氯矽烷、乙氧基苯基三甲氧基矽烷、乙氧基苯基三乙氧基矽烷、乙氧基苯基三乙醯氧基矽烷、乙氧基苯基三氯矽烷、乙氧基苄基三甲氧基矽烷、乙氧基苄基三乙氧基矽烷、乙氧基苄基三乙醯氧基矽烷、乙氧基苄基三氯矽烷、異丙氧基苯基三甲氧基矽烷、異丙氧基苯基三乙氧基矽烷、異丙氧基苯基三乙醯氧基矽烷、異丙氧基苯基三氯矽烷、異丙氧基苄基三甲氧基矽烷、異丙氧基苄基三乙氧基矽烷、異丙氧基苄基三乙醯氧基矽烷、異丙氧基苄基三氯矽烷、t-丁氧基苯基三甲氧基矽烷、t-丁氧基苯基三乙氧基矽烷、t-丁氧基苯基三乙醯氧基矽烷、t-丁氧基苯基三氯矽烷、t-丁氧基苄基三甲氧基矽烷、t-丁氧基苄基三乙氧基矽烷、t-丁氧基苄基三乙醯氧基矽烷、t-丁氧基苄基三氯矽烷、甲氧基萘基三甲氧基矽烷、甲氧基萘基三乙氧基矽烷、甲氧基萘基三乙醯氧基矽烷、甲氧基萘基三氯矽烷、乙氧基萘基三甲氧基矽烷、乙氧基萘基三乙氧基矽烷、乙氧基萘基三乙醯氧基矽烷、乙氧基萘基三氯矽烷、γ-氯丙基三甲氧基矽烷、γ-氯丙基三乙氧基矽烷、γ-氯丙基三乙醯氧基矽烷、3、3、3-三氟丙基三甲氧基矽烷、γ-甲基丙烯醯氧丙基三甲氧基矽烷、γ-巰基丙基三甲氧基矽烷、γ-巰基丙基三乙氧基矽烷、β-氰基乙基三乙氧基矽烷、氯甲基三甲氧基矽烷、氯甲基三乙氧基矽烷、二甲基二甲氧基矽烷、苯基甲基二甲氧基矽烷、二甲基二乙氧基矽烷、苯基甲基二乙氧基矽烷、γ-氯丙基甲基二甲氧基矽烷、γ-氯丙基甲基二乙氧基矽烷、二甲基二乙醯氧基矽烷、γ-甲基丙烯醯氧丙基甲基二甲氧基矽烷、γ-甲基丙烯醯氧丙基甲基二乙氧基矽烷、γ-巰基丙基甲基二甲氧基矽烷、γ-巰基甲基二乙氧基矽烷、甲基乙烯基二甲氧基矽烷、甲基乙烯基二乙氧基矽烷、乙醯氧基甲基三甲氧基矽烷、乙醯氧基乙基三甲氧基矽烷、乙醯氧基丙基三甲氧基矽烷、乙醯氧基甲基三乙氧基矽烷、乙醯氧基乙基三乙氧基矽烷、乙醯氧基丙基三乙氧基矽烷等。
作為式(3)的具體例,可舉例如,亞甲基雙三甲氧基矽烷、亞甲基雙三氯矽烷、亞甲基雙三乙醯氧基矽烷、乙烯雙三乙氧基矽烷、乙烯雙三氯矽烷、乙烯雙三乙醯氧基矽烷、丙烯雙三乙氧基矽烷、丁烯雙三甲氧基矽烷、伸苯基雙三甲氧基矽烷、伸苯基雙三乙氧基矽烷、伸苯基雙甲基二乙氧基矽烷、伸苯基雙甲基二甲氧基矽烷、伸萘基雙三甲氧基矽烷、雙三甲氧基二矽烷、雙三乙氧基二矽烷、雙乙基二乙氧基二矽烷、雙甲基二甲氧基二矽烷等。
本發明中,可含有式(1)的水解性矽烷,與式(2)的水解性矽烷之水解物作為聚合物。
式(1)的水解性矽烷,與其他的水解性矽烷的比例,以莫耳比,可搭配1:0.1~100、或1:1~100、或1:1~50、或1:1~20的比例。
上述水解性矽烷之水解縮合物(聚有機矽氧烷),可得到重量平均分子量為1000~1000000、或1000~ 100000的縮合物。此等之分子量為,以GPC分析且以聚苯乙烯換算所得之分子量。
GPC之測定條件,可使用,例如,GPC裝置(商品名HLC-8220GPC、東曹股份公司製)、GPC管柱(商品名ShodexKF803L、KF802、KF801、昭和電工製)、管柱溫度為40℃、溶離液(溶出溶劑)為四氫呋喃、流量(流速)為1.0ml/min、標準試料為聚苯乙烯(昭和電工股份公司製)而進行。
於烷氧基矽烷基、醯氧基矽烷基、或鹵化矽烷基的水解中,水解性基1莫耳,使用0.5莫耳~100莫耳、較佳為1莫耳~10莫耳之水。
又,水解性基1莫耳,可使用0.001莫耳~10莫耳、較佳為0.001莫耳~1莫耳之水解觸媒。
進行水解與縮合之時的反應溫度,通常為20℃~80℃。
水解可完全進行水解,亦可進行部分水解。即,水解縮合物中可殘留水解物或單體。
進行水解縮合之時,可使用觸媒。
水解觸媒,可舉例如,金屬螯合物化合物、有機酸、無機酸、有機鹽基、無機鹽基。
作為水解觸媒之金屬螯合物化合物,可舉例如,三乙氧基・單(乙醯丙酮)鈦、三-n-丙氧基・單(乙醯丙酮)鈦、三-i-丙氧基・單(乙醯丙酮)鈦、三-n-丁氧基・單(乙醯丙酮)鈦、三-sec-丁氧基・單(乙醯丙酮)鈦、三-t-丁氧基・單(乙醯丙酮)鈦、二乙氧基・雙(乙醯丙酮)鈦、二-n-丙氧基・雙(乙醯丙酮)鈦、二-i-丙氧基・雙(乙醯丙酮)鈦、二-n-丁氧基・雙(乙醯丙酮)鈦、二-sec-丁氧基・雙(乙醯丙酮)鈦、二-t-丁氧基・雙(乙醯丙酮)鈦、單乙氧基・參(乙醯丙酮)鈦、單-n-丙氧基・參(乙醯丙酮)鈦、單-i-丙氧基・參(乙醯丙酮)鈦、單-n-丁氧基・參(乙醯丙酮)鈦、單-sec-丁氧基・參(乙醯丙酮)鈦、單-t-丁氧基・參(乙醯丙酮)鈦、肆(乙醯丙酮)鈦、三乙氧基・單(乙基乙醯乙酸酯)鈦、三-n-丙氧基・單(乙基乙醯乙酸酯)鈦、三-i-丙氧基・單(乙基乙醯乙酸酯)鈦、三-n-丁氧基・單(乙基乙醯乙酸酯)鈦、三-sec-丁氧基・單(乙基乙醯乙酸酯)鈦、三-t-丁氧基・單(乙基乙醯乙酸酯)鈦、二乙氧基・雙(乙基乙醯乙酸酯)鈦、二-n-丙氧基・雙(乙基乙醯乙酸酯)鈦、二-i-丙氧基・雙(乙基乙醯乙酸酯)鈦、二-n-丁氧基・雙(乙基乙醯乙酸酯)鈦、二-sec-丁氧基・雙(乙基乙醯乙酸酯)鈦、二-t-丁氧基・雙(乙基乙醯乙酸酯)鈦、單乙氧基・參(乙基乙醯乙酸酯)鈦、單-n-丙氧基・參(乙基乙醯乙酸酯)鈦、單-i-丙氧基・參(乙基乙醯乙酸酯)鈦、單-n-丁氧基・參(乙基乙醯乙酸酯)鈦、單-sec-丁氧基・參(乙基乙醯乙酸酯)鈦、單-t-丁氧基・參(乙基乙醯乙酸酯)鈦、肆(乙基乙醯乙酸酯)鈦、單(乙醯丙酮)參(乙基乙醯乙酸酯)鈦、雙(乙醯丙酮)雙(乙基乙醯乙酸酯)鈦、參(乙醯丙酮)單(乙基乙醯乙酸酯)鈦、等之鈦螯合物化合物;三乙氧基・單(乙醯丙酮)鋯、三-n-丙氧基・單(乙醯丙酮)鋯、三-i-丙氧基・單(乙醯丙酮)鋯、三-n-丁氧基・單(乙醯丙酮)鋯、三-sec-丁氧基・單(乙醯丙酮)鋯、三-t-丁氧基・單(乙醯丙酮)鋯、二乙氧基・雙(乙醯丙酮)鋯、二-n-丙氧基・雙(乙醯丙酮)鋯、二-i-丙氧基・雙(乙醯丙酮)鋯、二-n-丁氧基・雙(乙醯丙酮)鋯、二-sec-丁氧基・雙(乙醯丙酮)鋯、二-t-丁氧基・雙(乙醯丙酮)鋯、單乙氧基・參(乙醯丙酮)鋯、單-n-丙氧基・參(乙醯丙酮)鋯、單-i-丙氧基・參(乙醯丙酮)鋯、單-n-丁氧基・參(乙醯丙酮)鋯、單-sec-丁氧基・參(乙醯丙酮)鋯、單-t-丁氧基・參(乙醯丙酮)鋯、肆(乙醯丙酮)鋯、三乙氧基・單(乙基乙醯乙酸酯)鋯、三-n-丙氧基・單(乙基乙醯乙酸酯)鋯、三-i-丙氧基・單(乙基乙醯乙酸酯)鋯、三-n-丁氧基・單(乙基乙醯乙酸酯)鋯、三-sec-丁氧基・單(乙基乙醯乙酸酯)鋯、三-t-丁氧基・單(乙基乙醯乙酸酯)鋯、二乙氧基・雙(乙基乙醯乙酸酯)鋯、二-n-丙氧基・雙(乙基乙醯乙酸酯)鋯、二-i-丙氧基・雙(乙基乙醯乙酸酯)鋯、二-n-丁氧基・雙(乙基乙醯乙酸酯)鋯、二-sec-丁氧基・雙(乙基乙醯乙酸酯)鋯、二-t-丁氧基・雙(乙基乙醯乙酸酯)鋯、單乙氧基・參(乙基乙醯乙酸酯)鋯、單-n-丙氧基・參(乙基乙醯乙酸酯)鋯、單-i-丙氧基・參(乙基乙醯乙酸酯)鋯、單-n-丁氧基・參(乙基乙醯乙酸酯)鋯、單-sec-丁氧基・參(乙基乙醯乙酸酯)鋯、單-t-丁氧基・參(乙基乙醯乙酸酯)鋯、肆(乙基乙醯乙酸酯)鋯、單(乙醯丙酮)參(乙基乙醯乙酸酯)鋯、雙(乙醯丙酮)雙(乙基乙醯乙酸酯)鋯、參(乙醯丙酮)單(乙基乙醯乙酸酯)鋯、等之鋯螯合物化合物;參(乙醯丙酮)鋁、參(乙基乙醯乙酸酯)鋁等之鋁螯合物化合物;等。
作為水解觸媒之有機酸,可舉例如,乙酸、丙酸、丁烷酸、戊烷酸、己烷酸、庚烷酸、辛烷酸、壬烷酸、癸烷酸、草酸、馬來酸、甲基丙二酸、己二酸、癸二酸、沒食子酸、酪酸、偏苯三甲酸、花生四烯酸、2-乙基己烷酸、油酸、硬脂酸、亞麻油酸、次亞麻酸、水楊酸、安息香酸、p-胺基安息香酸、p-甲苯磺酸、苯磺酸、單氯乙酸、二氯乙酸、三氯乙酸、三氟乙酸、甲酸、丙二酸、磺酸、鄰苯二甲酸、富馬酸、檸檬酸、酒石酸等。
作為水解觸媒之無機酸,可舉例如,鹽酸、硝酸、硫酸、氟酸、磷酸等。
作為水解觸媒之有機鹽基,可舉例如,吡啶、吡咯、哌嗪、吡咯烷、哌啶、甲吡啶、三甲基胺、三乙基胺、單乙醇胺、二乙醇胺、二甲基單乙醇胺、單甲基二乙醇胺、三乙醇胺、二氮雜雙環辛烷、二氮雜雙環壬烷、二氮雜雙環十一烯、四甲基銨氫氧化物等。無機鹽基,可舉列如,氨、氫氧化鈉、氫氧化鉀、氫氧化鋇、氫氧化鈣等。此等觸媒之中,以金屬螯合物化合物、有機酸、無機酸為佳,此等亦可1種或者2種以上同時使用。
作為水解所使用的有機溶劑,可舉例如,n-戊烷、i-戊烷、n-己烷、i-己烷、n-庚烷、i-庚烷、2,2,4-三甲基戊烷、n-辛烷、i-辛烷、環己烷、甲基環己烷等之脂肪族烴系溶劑;苯、甲苯、二甲苯、乙基苯、三甲基苯、甲基乙基苯、n-丙基苯、i-丙基苯、二乙基苯、i-丁基苯、三乙基苯、二-i-丙基苯、n-戊基萘、三甲基苯等之芳香族烴系溶劑;甲醇、乙醇、n-丙醇、i-丙醇、n-丁醇、i-丁醇、sec-丁醇、t-丁醇、n-戊醇、i-戊醇、2-甲基丁醇、sec-戊醇、t-戊醇、3-甲氧基丁醇、n-己醇、2-甲基戊醇、sec-己醇、2-乙基丁醇、sec-庚醇、庚醇-3、n-辛醇、2-乙基己醇、sec-辛醇、n-壬基醇、2,6-二甲基庚醇-4、n-癸醇、sec-十一基醇、三甲基壬基醇、sec-十四基醇、sec-十七基醇、酚、環己醇、甲基環己醇、3,3,5-三甲基環己醇、苄基醇、苯基甲基甲醇、二丙酮醇、甲酚等之單醇系溶劑;乙二醇、丙二醇、1,3-丁烯甘醇、戊烷二醇-2,4、2-甲基戊烷二醇-2,4、己二醇-2,5、庚烷二醇-2,4、2-乙基己二醇-1,3、二乙二醇、二丙二醇、三乙二醇、三丙二醇、甘油等之多元醇系溶劑;丙酮、甲基乙基酮、甲基-n-丙基酮、甲基-n-丁基酮、二乙基酮、甲基-i-丁基酮、甲基-n-戊基酮、乙基-n-丁基酮、甲基-n-己基酮、二-i-丁基酮、三甲基壬酮、環己酮、甲基環己酮、2,4-戊二酮、丙酮基丙酮、二丙酮醇、苯乙酮、茴香酮等之酮系溶劑;乙基醚、i-丙基醚、n-丁基醚、n-己基醚、2-乙基己基醚、環氧乙烷、1,2-氧化丙烯、二氧戊環、4-甲基二氧戊環、二噁烷、二甲基二噁烷、乙二醇單甲基醚、乙二醇單乙基醚、乙二醇二乙基醚、乙二醇單-n-丁基醚、乙二醇單-n-己基醚、乙二醇單苯基醚、乙二醇單-2-乙基丁基醚、乙二醇二丁基醚、二乙二醇單甲基醚、二乙二醇單乙基醚、二乙二醇二乙基醚、二乙二醇單-n-丁基醚、二乙二醇二-n-丁基醚、二乙二醇單-n-己基醚、乙氧基三甘醇、四乙二醇二-n-丁基醚、丙二醇單甲基醚、丙二醇單乙基醚、丙二醇單丙基醚、丙二醇單丁基醚、丙二醇單甲基醚乙酸酯、二丙二醇單甲基醚、二丙二醇單乙基醚、二丙二醇單丙基醚、二丙二醇單丁基醚、三丙二醇單甲基醚、四氫呋喃、2-甲基四氫呋喃等之醚系溶劑;二乙基碳酸酯、乙酸甲基、乙酸乙基、γ-丁內酯、γ-戊內酯、乙酸n-丙基、乙酸i-丙基、乙酸n-丁基、乙酸i-丁基、乙酸sec-丁基、乙酸n-戊基、乙酸sec-戊基、乙酸3-甲氧基丁基、乙酸甲基戊基、乙酸2-乙基丁基、乙酸2-乙基己基、乙酸苄基、乙酸環己基、乙酸甲基環己基、乙酸n-壬基、乙醯乙酸甲酯、乙醯乙酸乙酯、乙酸乙二醇單甲基醚、乙酸乙二醇單乙基醚、乙酸二乙二醇單甲基醚、乙酸二乙二醇單乙基醚、乙酸二乙二醇單-n-丁基醚、乙酸丙二醇單甲基醚、乙酸丙二醇單乙基醚、乙酸丙二醇單丙基醚、乙酸丙二醇單丁基醚、乙酸二丙二醇單甲基醚、乙酸二丙二醇單乙基醚、二乙酸甘醇、乙酸甲氧基三甘醇、丙酸乙基、丙酸n-丁基、丙酸i-戊基、草酸二乙基、草酸二-n-丁基、乳酸甲基、乳酸乙基、乳酸n-丁基、乳酸n-戊基、丙二酸二乙基、鄰苯二甲酸二甲基、鄰苯二甲酸二乙基等之酯系溶劑;N-甲基甲醯胺、N,N-二甲基甲醯胺、N,N-二乙基甲醯胺、乙醯胺、N-甲基乙醯胺、N,N-二甲基乙醯胺、N-甲基丙醯胺、N-甲基吡咯烷酮等之含氮系溶劑;二甲基硫、硫化二乙基、噻吩、四氫噻吩、二甲基亞碸、環丁碸、1,3-丙磺酸內酯等之含硫系溶劑等。此等之溶劑,可1種或2種以上之組合使用。
特別以丙酮、甲基乙基酮、甲基-n-丙基酮、甲基-n-丁基酮、二乙基酮、甲基-i-丁基酮、甲基-n-戊基酮、乙基-n-丁基酮、甲基-n-己基酮、二-i-丁基酮、三甲基壬酮、環己酮、甲基環己酮、2,4-戊二酮、丙酮基丙酮、二丙酮醇、苯乙酮、茴香酮等之酮系溶劑在溶液之保存安定性的觀點上為佳。
本發明中上述要素(b)對於鹼性顯影液之溶解誘發要素為, (b2)光產酸劑, 作為上述成分(a)與上述要素(b)之混合物,相對於全矽烷,可含有上述要素(b2)30質量%~60質量%。
光產酸劑,在阻劑曝光時產生酸。 光產酸劑,可舉例如,鎓氯化合物、磺醯亞胺化合物、及二磺醯基重氮基甲烷化合物等。
作為鎓氯化合物,可舉例如,二苯基碘鎓六氟磷酸酯、二苯基碘鎓三氟甲磺酸酯、二苯基碘鎓九氟正丁烷磺酸酯、二苯基碘鎓全氟正辛烷磺酸酯、二苯基碘鎓樟腦磺酸酯、雙(4-tert-丁基苯基)碘鎓樟腦磺酸酯及雙(4-tert-丁基苯基)碘鎓三氟甲磺酸酯等之碘鎓氯化合物、及三苯基鋶六氟銻酸鹽、三苯基鋶九氟正丁烷磺酸酯、三苯基鋶樟腦磺酸酯及三苯基鋶三氟甲磺酸酯等之鋶氯化合物等。
作為磺醯亞胺化合物,可舉例如,N-(三氟甲磺醯基氧基)琥珀醯亞胺、N-(九氟正丁烷磺醯基氧基)琥珀醯亞胺、N-(樟腦磺醯基氧基)琥珀醯亞胺及N-(三氟甲磺醯基氧基)萘二甲醯亞胺等。
作為二磺醯基重氮基甲烷化合物,可舉例如,雙(三氟甲基磺醯基)重氮基甲烷、雙(環己基磺醯基)重氮基甲烷、雙(苯基磺醯基)重氮基甲烷、雙(p-甲苯磺醯基)重氮基甲烷、雙(2,4-二甲基苯磺醯基)重氮基甲烷、及甲基磺醯基-p-甲苯磺醯基重氮基甲烷等。
光產酸劑可僅只使用一種,或可二種以上組合使用。
本發明中,上述要素(b)的對於鹼性顯影液之溶解誘發要素為,含有於上述成分(a)之化合物的構造,上述成分(a)為, 上述要素(b1)之式(1)所表示之水解性矽烷、該水解物、該水解縮合物、或該等之組合,及 可與上述要素(b2)的光產酸劑組合使用。
本發明中,作為添加劑,可添加雙酚S、或雙酚S衍生物。雙酚S、或雙酚S衍生物,相對於聚有機矽氧烷100質量份,為0.01質量份~20質量份、或0.01質量份~10質量份、或0.01質量份~5質量份。
本發明之微影術用阻劑下層膜形成組成物可含有硬化觸媒。硬化觸媒為,於使含有水解縮合物所構成的聚有機矽氧烷之塗佈膜加熱、硬化時,作為硬化觸媒的作用。
作為硬化觸媒,可使用銨鹽、膦類、鏻鹽、鋶鹽。
作為銨鹽,可舉例如,具有式(D-1):(但是,m表示2~11,n1
表示2~3的整數,R21
表示烷基或芳基,YA -
表示陰離子。)所表示構造之第4級銨鹽,具有式(D-2):(但是,R22
、R23
、R24
及R25
表示烷基或芳基,N表示氮原子,YA -
表示陰離子,且R22
、R23
、R24
、及R25
為各自藉由C-N鍵結與氮原子鍵結者)所表示構造之第4級銨鹽, 具有式(D-3):(但是,R26
及R27
表示烷基或芳基,YA -
表示陰離子)構造之第4級銨鹽, 具有式(D-4):(但是,R28
表示烷基或芳基,YA -
表示陰離子)之構造之第4級銨鹽, 具有式(D-5):(但是,R29
及R30
表示烷基或芳基,YA -
表示陰離子)構造之第4級銨鹽, 具有式(D-6):(但是,m表示2~11,n1
表示2~3的整數,H表示氫原子,YA -
表示陰離子)之構造之第3級銨鹽。 又,鏻鹽,可舉例如,式(D-7):(但是,R31
、R32
、R33
、及R34
表示烷基或芳基,P表示磷原子,YA -
表示陰離子,且R31
、R32
、R33
、及R34
為各自藉由C-P鍵結與磷原子鍵結者)所表示之第4級鏻鹽。 又,鋶鹽,可舉例如,式(D-8):(但是,R35
、R36
、及R37
表示烷基或芳基,S表示硫原子,YA -
表示陰離子,且R35
、R36
、及R37
為各自藉由C-S鍵結與硫原子鍵結者)所表示之第3級鋶鹽。
上述之式(D-1)的化合物,胺所衍生的第4級銨鹽,m表示2~11,n1
表示2~3的整數。此第4級銨鹽之R21
表示碳原子數1~18、較佳為2~10的烷基或芳基,可舉例如,乙基、丙基、丁基等之直鏈烷基、或苄基、環己基、環己基甲基、二環戊二烯基等。又,陰離子(YA -
),可舉例如,氯化物離子(Cl-
)、溴化物離子(Br-
)、碘化物離子(I-
)等之鹵化物離子,或羧酸酯(-COO-
)、磺酸根基(-SO3 -
)、醇化物(-O-
)等之酸基。
上述之式(D-2)的化合物為,R22
R23
R24
R25
N+
YA -
所示之第4級銨鹽。此第4級銨鹽之R22
、R23
、R24
及R25
為碳原子數1~18的烷基或芳基,或為藉由Si-C鍵結與矽原子鍵結之矽烷化合物。陰離子(YA -
),可舉例如,氯化物離子(Cl-
)、溴化物離子(Br-
)、碘化物離子(I-
)等之鹵化物離子,或羧酸酯(-COO-
)、磺酸根基(-SO3 -
)、醇化物(-O-
)等之酸基。此第4級銨鹽,可於市售品取得,例如,四甲基銨乙酸酯、四丁基銨乙酸酯、氯化三乙基苄基銨、溴化三乙基苄基銨、氯化三辛基甲基銨、氯化三丁基苄基銨、氯化三甲基苄基銨等所例示。
上述之式(D-3)的化合物為,1-取代咪唑所衍生的第4級銨鹽,R26
及R27
以碳原子數1~18,R26
及R27
之碳原子數的總和以具有7以上為佳。例如,R26
可以甲基、乙基、丙基、苯基、苄基,R27
可以苄基、辛基、十八基為例示。陰離子(YA -
),可舉例如,氯化物離子(Cl-
)、溴化物離子(Br-
)、碘化物離子(I-
)等之鹵化物離子,或羧酸酯(-COO-
)、磺酸根基(-SO3 -
)、醇化物(-O-
)等之酸基。此化合物,可於市售品取得,但例如可使1-甲基咪唑、1-苄基咪唑等之咪唑系化合物,與溴化苄基、溴甲烷等之鹵化烷基和鹵化芳基進行反應而製造。
上述之式(D-4)的化合物,吡啶所衍生的第4級銨鹽,R28
為碳原子數1~18、較佳為碳原子數4~18的烷基或芳基,例如,丁基、辛基、苄基、月桂基可例示。陰離子(YA -
),可舉例如,氯化物離子(Cl-
)、溴化物離子(Br-
)、碘化物離子(I-
)等之鹵化物離子,或羧酸酯(-COO-
)、磺酸根基(-SO3 -
)、醇化物(-O-
)等之酸基。此化合物,可於市售品取得,但例如使吡啶,與氯化月桂基、氯化苄基、溴化苄基、溴甲烷、溴化辛基等之鹵化烷基,或鹵化芳基進行反應而製造。此化合物,例如,氯化N-月桂基吡啶鎓、溴化N-苄基吡啶鎓等可例示。
上述之式(D-5)的化合物為,甲吡啶等所代表之取代吡啶所衍生的第4級銨鹽,R29
為碳原子數1~18、較佳為4~18的烷基或芳基,例如,甲基、辛基、月桂基、苄基等可例示。R30
為碳原子數1~18的烷基或芳基,例如甲吡啶所衍生的第4級銨之場合R30
為甲基。陰離子(YA -
),可舉例如,氯化物離子(Cl-
)、溴化物離子(Br-
)、碘化物離子(I-
)等之鹵化物離子,或羧酸酯(-COO-
)、磺酸根基(-SO3 -
)、醇化物(-O-
)等之酸基。此化合物可於市售品取得,但例如,可使甲吡啶等之取代吡啶,與溴甲烷、溴化辛基、氯化月桂基、氯化苄基、溴化苄基等之鹵化烷基,或鹵化芳基進行反應而製造。此化合物,例如,N-苄基甲基吡啶鎓氯化物、N-苄基甲基吡啶鎓溴化物、N-月桂基甲基吡啶鎓氯化物等可例示。
上述之式(D-6)的化合物為,胺所衍生的第3級銨鹽,m表示2~11,n表示2~3的整數。又,陰離子(YA -
),可舉例如,氯化物離子(Cl-
)、溴化物離子(Br-
)、碘化物離子(I-
)等之鹵化物離子,或羧酸酯(-COO-
)、磺酸根基(-SO3 -
)、醇化物(-O-
)等之酸基。可藉由胺與羧酸或酚等之弱酸的反應而製造。作為羧酸,可舉例如,甲酸或乙酸,使用甲酸的場合,陰離子(YA -
)為(HCOO-
),使用乙酸的場合,陰離子(YA -
)為(CH3
COO-
)。又,使用酚的場合,陰離子(YA -
)為(C6
H5
O-
)。
上述之式(D-7)的化合物為,具有R31
R32
R33
R34
P+
YA -
的構造之第4級鏻鹽。R31
、R32
、R33
、及R34
為碳原子數1~18的烷基或芳基,或為藉由Si-C鍵結與矽原子鍵結之矽烷化合物,但較佳為在R31
~R34
之4個取代基內,3個為苯基或被取代之苯基,例如苯基或甲苯基可例示,又,殘餘的1個為碳原子數1~18的烷基、芳基,或為藉由Si-C鍵結與矽原子鍵結之矽烷化合物。又,陰離子(YA -
)為,可舉例如,氯化物離子(Cl-
)、溴化物離子(Br-
)、碘化物離子(I-
)等之鹵素離子,或羧酸酯(-COO-
)、磺酸根基(-SO3 -
)、醇化物(-O-
)等之酸基。此化合物可由市售品取得,可舉例如,鹵化四n-丁基鏻、鹵化四n-丙基鏻等之鹵化四烷基鏻、鹵化三乙基苄基鏻等之鹵化三烷基苄基鏻、鹵化三苯基甲基鏻、鹵化三苯基乙基鏻等之鹵化三苯基單烷基鏻、鹵化三苯基苄基鏻、鹵化四苯基鏻、鹵化三甲苯基單芳基鏻、或者鹵化三甲苯基單烷基鏻(鹵素原子為氯原子或溴原子)。特別以鹵化三苯基甲基鏻、鹵化三苯基乙基鏻等之鹵化三苯基單烷基鏻、鹵化三苯基苄基鏻等之鹵化三苯基單芳基鏻、鹵化三甲苯基單苯基鏻等之鹵化三甲苯基單芳基鏻、或鹵化三甲苯基單甲基鏻等之鹵化三甲苯基單烷基鏻(鹵素原子為氯原子或溴原子)為佳。
又,作為膦類,可舉例如,甲基膦、乙基膦、丙基膦、異丙基膦、異丁基膦、苯基膦等之第一膦、二甲基膦、二乙基膦、二異丙基膦、二異戊基膦、二苯基膦等之第二膦、三甲基膦、三乙基膦、三苯基膦、甲基二苯基膦、二甲基苯基膦等之第三膦。
上述之式(D-8)的化合物為,具有R35
R36
R37
S+
YA -
的構造之第3級鋶鹽。R35
、R36
、及R37
為碳原子數1~18的烷基或芳基,或為藉由Si-C鍵結與矽原子鍵結之矽烷化合物,但較佳為R35
~R37
之4個取代基內,3個為苯基或被取代之苯基,例如苯基或甲苯基可例示,又,殘餘的1個為碳原子數1~18的烷基、或芳基。又,可舉例如,陰離子(YA -
)為,氯化物離子(Cl-
)、溴化物離子(Br-
)、碘化物離子(I-
)等之鹵化物離子,或羧酸酯(-COO-
)、磺酸根基(-SO3 -
)、醇化物(-O-
)等之酸基。此化合物可於市售品取得,可舉例如,鹵化三正-丁基鋶、鹵化三正-丙基鋶等之鹵化四烷基鋶、鹵化二乙基苄基鋶等之鹵化三烷基苄基鋶、鹵化二苯基甲基鋶、鹵化二苯基乙基鋶等之鹵化二苯基單烷基鋶、鹵化三苯基鋶、(鹵素原子為氯原子或溴原子)、三正-丁基鋶羧酸酯、三正-丙基鋶羧酸酯等之四烷基鏻羧酸酯、二乙基苄基鋶羧酸酯等之三烷基苄基鋶羧酸酯、二苯基甲基鋶羧酸酯、二苯基乙基鋶羧酸酯等之二苯基單烷基鋶羧酸酯、三苯基鋶羧酸酯。特別以鹵化三苯基鋶、三苯基鋶羧酸酯為佳。
硬化觸媒,相對於聚有機矽氧烷100質量份,為0.01質量份~10質量份,或0.01質量份~5質量份,或0.01質量份~3質量份。
使水解性矽烷於溶劑中,使用觸媒進行水解、縮合,得到的水解縮合物(聚合物)可藉由減壓蒸餾等將副生成物的醇或經使用之水解觸媒或水同時除去。又,於水解所使用之酸或鹽基觸媒,可藉由中和或離子交換予以去除。接著,在本發明之微影術用阻劑下層膜形成組成物,為使含有該水解縮合物之阻劑下層膜形成組成物安定化,可添加有機酸、水、醇、或該等之組合。
上述有機酸,可舉例如,草酸、丙二酸、甲基丙二酸、琥珀酸、馬來酸、蘋果酸、酒石酸、鄰苯二甲酸、檸檬酸、戊二酸、檸檬酸、乳酸、水楊酸等。其中,又以草酸、馬來酸等為佳。添加之有機酸,相對於縮合物(聚有機矽氧烷)100質量份,為0.1質量份~5.0質量份。又,所添加之水,可使用純水、超純水、離子交換水等,其添加量,相對於阻劑下層膜形成組成物100質量份,可為1質量份~20質量份。
又,作為添加之醇,以藉由塗佈後的加熱可容易飛散者為佳,可舉例如,甲醇、乙醇、丙醇、異丙醇、丁醇等。添加之醇,相對於阻劑下層膜形成組成物100質量份,可為1質量份~20質量份。
本發明之微影術用下層膜形成組成物,除上述之成分之其他,因應必要可含有有機聚合物化合物、光產酸劑及界面活性劑等。
藉由使用有機聚合物化合物,可調整本發明之微影術用下層膜形成組成物所形成的阻劑下層膜之乾蝕刻速度(每單位時間之膜厚的減少量)、減衰係數及折射率等。
作為有機聚合物化合物並無特別制限,可使用種種之有機聚合物。可使用縮聚合聚合物及加成聚合聚合物等。可使用聚酯、聚苯乙烯、聚醯亞胺、丙烯酸聚合物、甲基丙烯酸聚合物、聚乙烯基醚、酚酚醛清漆、萘酚酚醛清漆、聚醚、聚醯胺、聚碳酸酯等之加成聚合聚合物及縮聚合聚合物。以使用具有作為吸光部位之作用的苯環、萘環、蒽環、三嗪環、喹啉環、及喹喔啉環等之芳香環構造之有機聚合物為佳。
這般有機聚合物化合物,可舉例如,含有以苄基丙烯酸酯、苄基甲基丙烯酸酯、苯基丙烯酸酯、萘基丙烯酸酯、蒽基甲基丙烯酸酯、蒽基甲基甲基丙烯酸酯、苯乙烯、羥基苯乙烯、苄基乙烯基醚及N-苯基馬來醯亞胺等之加成聚合性單體作為其構造單位之加成聚合聚合物、或酚酚醛清漆及萘酚酚醛清漆等之縮聚合聚合物。
作為有機聚合物化合物使用加成聚合聚合物的場合,其聚合物化合物可為單獨聚合物亦可為共聚物。於加成聚合聚合物之製造中使用加成聚合性單體。作為此般加成聚合性單體,可舉例如,丙烯酸、甲基丙烯酸、丙烯酸酯化合物、甲基丙烯酸酯化合物、丙烯醯胺化合物、甲基丙烯醯胺化合物、乙烯基化合物、苯乙烯化合物、馬來醯亞胺化合物、馬來酸酐、丙烯腈等。
作為聚合物使用縮聚合聚合物的場合,作為此般聚合物,可舉例如,甘醇化合物與二羧氧化合物的縮聚合聚合物。作為甘醇化合物,可舉例如,二乙二醇、六亞甲基甘醇、丁烯甘醇等。作為二羧氧化合物,可舉例如,琥珀酸、己二酸、對苯二甲酸、馬來酸酐等。又,可舉例如,聚均苯二甲醯亞胺(polypyromellitimide)、聚(p-伸苯基對苯二甲醯胺)、聚對苯二甲酸丁二醇酯、聚對苯二甲酸乙二醇酯等之聚酯、聚醯胺、聚醯亞胺。
在有機聚合物化合物含有羥基的場合,此羥基可與聚有機矽氧烷形成交聯反應。
有機聚合物化合物,可舉例如,可使用重量平均分子量為1000~1000000、或3000~300000、或5000 ~200000、或10000~100000之聚合物化合物。
有機聚合物化合物,可僅只使用一種,或可二種以上組合使用。
使用有機聚合物化合物的場合,作為其比例,可舉例如,相對於縮合物(聚有機矽氧烷)100質量份,為1質量份~200質量份、或5質量份~100質量份、或10質量份~50質量份、或20質量份~30質量份。
界面活性劑為,使本發明之微影術用阻劑下層膜形成組成物塗佈於基板之際,有效於抑制針孔及應變(Strain)等之產生。
作為本發明之阻劑下層膜形成組成物所含有的界面活性劑,可舉例如,聚氧乙烯月桂基醚、聚氧乙烯硬脂醯基醚、聚氧乙烯十六基醚、聚氧乙烯油烯基醚等之聚氧乙烯烷基醚類、聚氧乙烯辛基酚醚、聚氧乙烯壬基酚醚等之聚氧乙烯烷基烯丙基醚類、聚氧乙烯・聚氧丙烯嵌段共聚物類、山梨糖單月桂酸酯、山梨糖醇酐單棕櫚酸酯、山梨糖醇酐單硬脂酸酯、山梨糖醇酐單油酸酯、山梨糖醇酐三油酸酯、山梨糖醇酐三硬脂酸酯等之山梨糖醇酐脂肪酸酯類、聚氧乙烯山梨糖單月桂酸酯、聚氧乙烯山梨糖醇酐單棕櫚酸酯、聚氧乙烯山梨糖醇酐單硬脂酸酯、聚氧乙烯山梨糖醇酐三油酸酯、聚氧乙烯山梨糖醇酐三硬脂酸酯等之聚氧乙烯山梨糖醇酐脂肪酸酯類等之非離子系界面活性劑,商品名EFTOPEF301、EF303、EF352((股) Tochem Products.製)、商品名MEGAFACF171、F173、R-08、R-30(大日本油墨化學工業(股)製)、FluoradFC430、FC431(住友3M(股)製)、商品名AsahiguardAG710,SurflonS-382、SC101、SC102、SC103、SC104、SC105、SC106(旭硝子(股)製)等之氟系界面活性劑、及有機矽氧烷聚合物-KP341(信越化學工業(股)製)等。此等之界面活性劑,可單獨使用,又,可二種以上之組合使用。使用界面活性劑的場合,作為其比例,可舉例如,相對於縮合物(聚有機矽氧烷)100質量份,為0.0001質量份~5質量份、或0.001質量份~1質量份、或0.01質量份~0.5質量份。
又,在本發明之阻劑下層膜形成組成物,可添加流變調整劑及接著補助劑等。流變調整劑,對於改善下層膜形成組成物的流動性有效。接著補助劑,對於改善半導體基板或阻劑與下層膜之密著性有效。
作為本發明之阻劑下層膜形成組成物所使用的溶劑,可舉例如,如為可溶解上述之固形分之溶劑,可不特別制限使用。作為此般溶劑,可舉例如,甲基溶纖劑乙酸酯、乙基溶纖劑乙酸酯、丙二醇、丙二醇單甲基醚、丙二醇單乙基醚、甲基異丁基甲醇、丙二醇單丁基醚、丙二醇單甲基醚乙酸酯、丙二醇單乙基醚乙酸酯、丙二醇單丙基醚乙酸酯、丙二醇單丁基醚乙酸酯、甲苯、二甲苯、甲基乙基酮、環戊酮、環己酮、2-羥基丙酸乙基、2-羥基-2-甲基丙酸乙基、乙氧基乙酸乙基、羥基乙酸乙基、2-羥基-3-甲基丁烷酸甲基、3-甲氧基丙酸甲基、3-甲氧基丙酸乙基、3-乙氧基丙酸乙基、3-乙氧基丙酸甲基、丙酮酸甲基、丙酮酸乙基、乙二醇單甲基醚、乙二醇單乙基醚、乙二醇單丙基醚、乙二醇單丁基醚、乙二醇單甲基醚乙酸酯、乙二醇單乙基醚乙酸酯、乙二醇單丙基醚乙酸酯、乙二醇單丁基醚乙酸酯、二乙二醇二甲基醚、二乙二醇二乙基醚、二乙二醇二丙基醚、二乙二醇二丁基醚、丙二醇單甲基醚、丙二醇二甲基醚、丙二醇二乙基醚、丙二醇二丙基醚、丙二醇二丁基醚、乳酸乙基、乳酸丙基、乳酸異丙基、乳酸丁基、乳酸異丁基、甲酸甲基、甲酸乙基、甲酸丙基、甲酸異丙基、甲酸丁基、甲酸異丁基、甲酸戊基、甲酸異戊基、乙酸甲基、乙酸乙基、乙酸戊基、乙酸異戊基、乙酸己基、丙酸甲基、丙酸乙基、丙酸丙基、丙酸異丙基、丙酸丁基、丙酸異丁基、酪酸甲基、酪酸乙基、酪酸丙基、酪酸異丙基、酪酸丁基、酪酸異丁基、羥基乙酸乙基、2-羥基-2-甲基丙酸乙基、3-甲氧基-2-甲基丙酸甲基、2-羥基-3-甲基酪酸甲基、甲氧基乙酸乙基、乙氧基乙酸乙基、3-甲氧基丙酸甲基、3-乙氧基丙酸乙基、3-甲氧基丙酸乙基、3-甲氧基丁基乙酸酯、3-甲氧基丙基乙酸酯、3-甲基-3-甲氧基丁基乙酸酯、3-甲基-3-甲氧基丁基丙酸酯、3-甲基-3-甲氧基丁基丁酸酯、乙醯乙酸甲酯、甲基丙基酮、甲基丁基酮、2-庚酮、3-庚酮、4-庚酮、N、N-二甲基甲醯胺、N-甲基乙醯胺、N,N-二甲基乙醯胺、N-甲基吡咯烷酮、4-甲基-2-戊醇、及γ-丁內酯等。此等之溶劑可單獨,或二種以上組合使用。
以下,對於本發明之阻劑下層膜形成組成物的使用進行說明。 在半導體裝置的製造所使用的基板(例如,矽晶圓-基板、矽/二氧化矽被覆基板、矽氮化物基板、玻璃基板、ITO基板、聚醯亞胺基板、及低介電常數材料(low-k材料)被覆基板等)上,藉由旋轉器、塗佈(Coater)等之適當的塗佈方法塗佈本發明之阻劑下層膜形成組成物,之後,藉由燒成形成阻劑下層膜。作為燒成條件,可舉例如,由燒成溫度80℃~250℃、燒成時間0.3分鐘~60分鐘中,適宜選擇。較佳為,燒成溫度150℃~250℃、燒成時間0.5分鐘~2分鐘。在此,所形成之下層膜的膜厚,可舉例如,10nm~ 1000nm、或20nm~500nm、或50nm~300nm、或100nm~ 200nm。
接著,在其阻劑下層膜上,例如形成光阻之層。光阻之層的形成,可使用周知之方法,即,可進行藉由光阻組成物溶液的下層膜上之塗佈及燒成。作為光阻之膜厚,例如,50nm~10000nm、或100nm~2000nm、或200 nm~1000 nm。
於本發明中基板上使有機下層膜成膜之後,於此上使本發明之阻劑下層膜成膜,更可於其上被覆光阻。藉此,光阻之圖型寬度狹窄化,即使為防止圖型倒塌而僅被覆薄化之光阻的場合,亦可選擇適當之蝕刻氣體進行基板之加工。例如,可使用對於光阻為充分及快速的蝕刻速度之氟系氣體作為蝕刻氣體,對於本發明之阻劑下層膜進行加工,又,可使用對本發明之阻劑下層膜為充分及快速的蝕刻速度之氧系氣體作為蝕刻氣體,對有機下層膜進行加工,更進一步,可使用對有機下層膜為充分及快速之蝕刻速度的氟系氣體作為蝕刻氣體,進行基板的加工。
作為本發明之阻劑下層膜上所形成之光阻,如為對於曝光所使用的光具感光者,則不特別限定。可使用負型光阻及正型光阻之任一者。酚醛清漆樹脂與1,2-二疊氮基萘醌磺酸酯所構成的正型光阻、具有藉由酸分解使鹼溶解速度上昇之基的黏合劑與光產酸劑所構成的化學增幅型光阻、藉由酸分解使光阻的鹼溶解速度上昇的低分子化合物與鹼可溶性黏合劑與光產酸劑所構成的化學增幅型光阻、及具有藉由酸分解使鹼溶解速度上昇之基的黏合劑與藉由酸分解使光阻之鹼溶解速度上昇的低分子化合物與光產酸劑所構成的化學增幅型光阻等。可舉例如,SHIPLEY公司製商品名APEX-E、住友化學工業(股)製商品名PAR710、及信越化學工業(股)製商品名SEPR430等。又,例如,Proc.SPIE,Vol.3999,330-334(2000)、Proc.SPIE,Vol.3999,357-364(2000)、或Proc.SPIE,Vol.3999,365-374(2000)所記載般,含氟原子聚合物系光阻。
接著,通過指定的遮罩進行曝光。對於曝光,可使用KrF準分子雷射(波長248nm)、ArF準分子雷射(波長193nm)及F2準分子雷射(波長157nm)等。曝光後,亦可因應必要進行曝光後加熱(post exposure bake)。曝光後加熱,由加熱溫度70℃~150℃、加熱時間0.3分鐘~10分鐘,選擇適宜之條件而進行。
又,本發明中,作為阻劑,可變更光阻,而使用電子束微影術用阻劑,或EUV微影術用阻劑。作為電子束阻劑,可使用負型、正型任一種。酸產生劑與具有藉由酸分解使鹼溶解速度產生變化之基的黏合劑所構成的化學增幅型阻劑、鹼可溶性黏合劑與酸產生劑與藉由酸分解使阻劑之鹼溶解速度產生變化之低分子化合物所構成的化學增幅型阻劑、酸產生劑與具有藉由酸分解使鹼溶解速度產生變化之基的黏合劑與藉由酸分解使阻劑之鹼溶解速度產生變化之低分子化合物所構成的化學增幅型阻劑、具有藉由電子束分解使鹼溶解速度產生變化之基的黏合劑所構成的非化學增幅型阻劑、具有藉由電子束所切斷之鹼溶解速度產生變化的部位之黏合劑所構成的非化學增幅型阻劑等。此等使用電子束阻劑的場合亦使照射源作為電子束使用光阻的場合可同樣形成阻劑圖型。
又,作為EUV阻劑,可使用甲基丙烯酸酯樹脂系阻劑。
接著,藉由顯影液(例如鹼性顯影液)進行顯影。藉由此,例如使用正型光阻的場合,曝光部分之光阻被除去,而形成光阻的圖型。
作為顯影液,可舉例如,氫氧化鉀、氫氧化鈉等之鹼金屬氫氧化物的水溶液、氫氧化四甲基銨、氫氧化四乙基銨、膽鹼等之氫氧化四級銨的水溶液、乙醇胺、丙基胺、伸乙二胺等之胺水溶液等之鹼性水溶液。進一步,亦可在此等之顯影液中添加界面活性劑等。作為顯影的條件,可舉例如,由溫度5℃~50℃、時間10秒~600秒中適宜選擇。
接著,按照如此而形成的光阻圖型(上層)與阻劑圖型,本發明之阻劑下層膜(中間層)藉由鹼性顯影液而除去,接著以圖型化之光阻及本發明之阻劑下層膜(中間層)所構成的膜作為保護膜,進行有機下層膜(下層)的除去。最後,以圖型化之本發明之阻劑下層膜(中間層)及有機下層膜(下層)作為保護膜,進行半導體基板的加工。
首先,使光阻圖型、與按照光阻圖型的本發明之阻劑下層膜(中間層)藉由鹼性顯影液而去除,更進一步,加工下層。
又,以圖型化之光阻及本發明之阻劑下層膜所構成的膜作為保護膜進行除去有機下層膜。有機下層膜(下層)以藉由氧系氣體進行乾蝕刻為佳。因含有較多矽原子的本發明之阻劑下層膜,不容易為氧系氣體以乾蝕刻方式所除去。
最後,進行半導體基板的加工。半導體基板的加工以氟系氣體藉由乾蝕刻進行為佳。 作為氟系氣體,可舉例如,四氟甲烷(CF4
)、全氟環丁烷(C4
F8
)、全氟丙烷(C3
F8
)、三氟甲烷、及二氟甲烷(CH2
F2
)等。
基板加工後,殘存於基板上的基板加工所使用之阻劑下層膜,可使用鹼性水溶液而除去。此鹼性水溶液,可使用例如,氫氧化四甲基銨水溶液,或氫氧化四乙基銨水溶液。 此等之鹼性水溶液的濃度亦可使用2.38質量%濃度,但亦可使用10質量%、20質量%、或30質量%之高濃度的鹼性水溶液。
又,塗佈本發明之阻劑下層膜形成組成物之基板為,可具有於其表面以CVD法等所形成之有機系或無機系防反射膜者,亦可於其上形成本發明之下層膜。
由本發明之阻劑下層膜形成組成物所形成之阻劑下層膜,又,依微影術製程中所使用之光的波長,而對於其光具有吸收。接著,於此般場合,可作為具有防止來自基板的反射光之效果的防反射膜而作用。進一步,本發明之下層膜為,可作為防止基板與光阻相互作用之層,具有防止光阻所使用的材料或對光阻之曝光時所生成的物質對於基板不良作用之機能的層,具有防止於加熱燒成時由基板生成之物質對上層光阻的擴散之機能的層,及減少因半導體基板介電體層對光阻層之毒化作用的障壁層等。
又,由阻劑下層膜形成組成物所形成之阻劑下層膜,適用於雙重金屬鑲嵌製程所使用之形成介層洞之基板,可使用作為填充孔穴使其不產生間隙之填埋材料。又,可使用作為使有凹凸之半導體基板的表面平坦化之平坦化材。
又,作為EUV阻劑的下層膜,除作為硬遮罩之作用以外,亦可使用於以下之目的。不會與EUV阻劑產生互混(intermixing),而於EUV曝光(波長13.5nm)時的不佳之曝光的光,例如作為防止來自上述之UV或DUV(ArF光、KrF光)的基板或界面之反射的EUV阻劑之下層防反射膜,可使用上述阻劑下層膜形成組成物。可於EUV阻劑之下層有效率防反射。使用作為EUV阻劑下層膜的場合,製程可與光阻用下層膜同樣方法進行。
[實施例]
(合成例1) 將四乙氧基矽烷20.0g、苯基三甲氧基矽烷1.5g、5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮14.6g、丙酮54.2g放入300ml的燒瓶內,將混合溶液以磁攪拌器邊攪拌邊將0.01M鹽酸水溶液9.7g於混合溶液中滴下。添加後,將燒瓶移動至經調整為85℃的油浴,使迴流240分鐘。之後,加入丙二醇單甲基醚72g,丙酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,在140℃以固形殘物換算並調整成為13質量百分比。得到的聚合物,相當為式(4-1),使用GPC分析之重量平均分子量Mw,以聚苯乙烯換算為1500。5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮,於全矽烷中,含有30莫耳%之比例。
(合成例2) 將四乙氧基矽烷19.5g、5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮14.2g、N-(3-(三乙氧基矽烷基)丙基)苯磺醯胺2.6g、丙酮54.3g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將0.1M硝酸水溶液9.5g於混合溶液中滴下。添加後,將燒瓶移動至經調整為85℃的油浴,使迴流240分鐘。之後,加入丙二醇單甲基醚72g,丙酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,在140℃以固形殘物換算並調整成為13質量百分比。得到的聚合物,相當於式(4-2),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為1500。5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮,於全矽烷中,含有30莫耳%之比例。
(合成例3) 將四乙氧基矽烷18.2g、二-tert-丁基2-(3-(三乙氧基矽烷基)丙基)丙二酸酯16.9g、苯基三甲氧基矽烷1.33g、丙酮54.7g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將0.01M鹽酸水溶液8.8g於混合溶液中滴下。添加後,將燒瓶移動至經調整為85℃的油浴,使迴流240分鐘。之後,加入丙二醇單甲基醚72g,丙酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,在140℃以固形殘物換算並調整成為13質量百分比。得到的聚合物,相當於式(4-3),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為1500。二-tert-丁基2-(3-(三乙氧基矽烷基)丙基)丙二酸酯,於全矽烷中,含有30莫耳%之比例。
(合成例4) 將四乙氧基矽烷17.7g、二-tert-丁基2-(3-(三乙氧基矽烷基)丙基)丙二酸酯16.5g、N-(3-(三乙氧基矽烷基)丙基)苯磺醯胺2.4g、丙酮54.8g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將0.01M鹽酸水溶液8.8g於混合溶液中滴下。添加後,將燒瓶移動至經調整為85℃的油浴,使迴流240分鐘。之後,加入丙二醇單甲基醚72g,丙酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,在140℃以固形殘物換算並調整成為13質量百分比。得到的聚合物,相當於式(4-4),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為1500。二-tert-丁基2-(3-(三乙氧基矽烷基)丙基)丙二酸酯,於全矽烷中,含有30莫耳%之比例。
(合成例5) 將四乙氧基矽烷20.6g、3-(3-(三乙氧基矽烷基)丙基)二氫呋喃-2,5-二酮13.9g、苯基三甲氧基矽烷1.51g、丙酮54.0g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將0.01M鹽酸水溶液10.0g於混合溶液中滴下。添加後,將燒瓶移動至經調整為85℃的油浴,使迴流240分鐘。之後,加入丙二醇單甲基醚72g,丙酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,在140℃以固形殘物換算並調整成為13質量百分比。得到的聚合物相當於式(4-5),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為1500。3-(3-(三乙氧基矽烷基)丙基)二氫呋喃-2,5-二酮,於全矽烷中,含有30莫耳%之比例。
(合成例6) 將四乙氧基矽烷20.0g、3-(3-(三乙氧基矽烷基)丙基)二氫呋喃-2,5-二酮13.5g、N-(3-(三乙氧基矽烷基)丙基)苯磺醯胺2.67g、丙酮54.2g放入300ml的燒瓶內、將混合溶液以磁攪拌器邊攪拌邊將0.01M鹽酸水溶液9.7g於混合溶液中滴下。添加後,將燒瓶移動至經調整為85℃的油浴,使迴流240分鐘。之後,加入丙二醇單甲基醚72g,丙酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,在140℃以固形殘物換算並調整成為13質量百分比。得到的聚合物,相當於式(4-6),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為1500。3-(3-(三乙氧基矽烷基)丙基)二氫呋喃-2,5-二酮,於全矽烷中,含有30莫耳%之比例。
(合成例7) 將四乙氧基矽烷12.8g、5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮22.4g、苯基三甲氧基矽烷1.35g、丙酮54.9g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將0.01M鹽酸水溶液8.5g於混合溶液中滴下。添加後,將燒瓶移動至經調整為85℃的油浴,使迴流240分鐘。之後,加入丙二醇單甲基醚72g,丙酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,在140℃以固形殘物換算並調整成為13質量百分比。得到的聚合物,相當於式(4-7),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為1500。5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮,於全矽烷中,含有50莫耳%之比例。
(合成例8) 將四乙氧基矽烷17.2g、5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮13.5g、三乙氧基矽烷基丙基二烯丙基異氰脲酸酯5.69g、丙酮54.6g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將0.01M鹽酸水溶液8.9g於混合溶液中滴下。添加後,將燒瓶移動至經調整為85℃的油浴,使迴流240分鐘。之後,加入丙二醇單甲基醚72g,丙酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,在140℃以固形殘物換算並調整成為13質量百分比。得到的聚合物,相當於式(4-8),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為1500。5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮,於全矽烷中,含有30莫耳%之比例。
(合成例9) 將35wt%氫氧化四乙銨水溶液0.81g、水1.30g、異丙基醇27.63g、甲基異丁基酮55.25g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將(4-(1-乙氧基乙氧基)苯基)三甲氧基矽烷27.6g於混合溶液中滴下。添加後,將燒瓶移動至經調整為40℃之油浴,使反應240分鐘。之後,於反應溶液中加入1M硝酸48.2g,更進一步於40℃,得到具有使乙氧基乙氧基去保護之酚基的水解縮合物。之後,加入甲基異丁基酮165.76g、水82.88g,以分液操作將移行至水層之反應副產物的水、硝酸、四乙基銨硝酸鹽餾去,回收有機層。之後,加入丙二醇單甲基醚82.88g,將甲基異丁基酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,丙二醇單甲基醚100%之溶劑比率,在140℃以固形殘物換算並調整成為20質量百分比。得到的聚合物,相當於式(4-9),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為2500。含有使(4-(1-乙氧基乙氧基)苯基)三甲氧基矽烷之使乙氧基乙氧基去保護之酚基的單元,於全矽烷中,含有100莫耳%之比例。
(合成例10) 將35wt%氫氧化四乙銨水溶液0.78g、水1.24g、異丙基醇27.34g、甲基異丁基酮54.67g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮27.34g、(4-(1-乙氧基乙氧基)苯基)三甲氧基矽烷2.65g於混合溶液中滴下。添加後,將燒瓶移動至經調整為40℃之油浴,使反應240分鐘。之後,於反應溶液中加入1M硝酸46.2g,更進一步於40℃,得到具有使乙氧基乙氧基去保護的酚基與二羧酸基之水解縮合物。之後,加入甲基異丁基酮164.0g、水82.0g,以分液操作將移行至水層之反應副產物的水、硝酸、四乙基銨硝酸鹽餾去,回收有機層。之後,加入丙二醇單甲基醚82.0g,將甲基異丁基酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,丙二醇單甲基醚100%之溶劑比率,在140℃以固形殘物換算並調整成為20質量百分比。得到的聚合物,相當於式(4-10),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為2000。含有使(4-(1-乙氧基乙氧基)苯基)三甲氧基矽烷的乙氧基乙氧基去保護之酚基單元,於全矽烷中,含有10莫耳%之比例,使5-(三乙氧基矽烷基)六氫-4,7-甲醇異苯並呋喃-1,3-二酮進行水解而得到含有二羧酸之單元,於全矽烷中,含有90莫耳%之比例。
(合成例11) 將35wt%氫氧化四乙銨水溶液0.86g、水1.38g、異丙基醇28.15g、甲基異丁基酮56.30g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將3-(3-(三乙氧基矽烷基)丙基)二氫呋喃-2,5-二酮28.15g、(4-(1-乙氧基乙氧基)苯基)三甲氧基矽烷2.94g於混合溶液中滴下。添加後,將燒瓶移動至經調整為40℃之油浴,使反應240分鐘。之後,於反應溶液中加入1M硝酸51.4g,更進一步於40℃得到具有乙氧基乙氧基經去保護的酚基與二羧酸基之水解縮合物。之後,加入甲基異丁基酮168.9g、水84.5g,以分液操作將移行至水層之反應副產物的水、硝酸、四乙基銨硝酸鹽餾去,回收有機層。之後,加入丙二醇單甲基醚84.5g,將甲基異丁基酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,使丙二醇單甲基醚以100%之溶劑比率,在140℃以固形殘物換算並調整成為20質量百分比。得到的聚合物相當於式(4-11),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為2100。使含有(4-(1-乙氧基乙氧基)苯基)三甲氧基矽烷的乙氧基乙氧基經去保護之酚基的單元,於全矽烷中以10莫耳%之比例含有,使3-(3-(三乙氧基矽烷基)丙基)二氫呋喃-2,5-二酮進行水解而得到含有二羧酸之單元,於全矽烷中,含有90莫耳%之比例。
(比較合成例1) 將四乙氧基矽烷24.1g、苯基三甲氧基矽烷1.8g、三乙氧基甲基矽烷9.5g、丙酮53.0g放入300ml的燒瓶中,將混合溶液以磁攪拌器邊攪拌邊將0.01M鹽酸水溶液11.7g於混合溶液中滴下。添加後,將燒瓶移動至經調整為85℃的油浴,使迴流240分鐘。之後,加入丙二醇單甲基醚70g,使丙酮、甲醇、乙醇、水以減壓餾去,得到濃縮之水解縮合物(聚合物)水溶液。更進一步加入丙二醇單甲基醚,在140℃以固形殘物換算並調整成為13質量百分比。得到的聚合物相當於式(5-1),使用GPC分析重量平均分子量Mw,以聚苯乙烯換算為1400。
(含有Si之阻劑下層膜的調整) 使上述合成例1所得到的含有矽之聚合物、酸、溶劑以於表1及表2所示的比例混合,藉由以0.1μm之氟樹脂製的過濾器進行過濾,而各自調製成含有聚合物之塗佈液。表1及表2中聚合物的添加比例並非聚合物溶液的添加量,乃表示聚合物本身的添加量。 TPSMale(光產酸劑)表示三苯基鋶馬來酸,TPSNO3 (光產酸劑)表示三苯基鋶硝酸鹽,TPSCS(光產酸劑)表示三苯基鋶樟腦磺酸鹽,TPSTFA(光產酸劑)表示三苯基鋶三氟乙酸鹽,TPSNf(光產酸劑)表示三苯基鋶九氟丁烷磺酸酯、TPSTf(光產酸劑)表示三苯基鋶三氟甲烷磺酸酯,TPSAdTf(光產酸劑)表示三苯基鋶金剛烷羧酸丁基三氟甲磺酸,ImideTEOS表示4,5-二氫咪唑丙基三乙氧基矽烷,TPSCl(光產酸劑)表示三苯基鋶氯化物,TPSAc(光產酸劑)表示三苯基鋶乙酸鹽,TPSMS(光產酸劑)表示三氟甲烷鋶甲磺酸酯,Tris-VE表示參(4-(乙烯氧基)丁基)苯-1,3,5-三羧酸酯,PGME表示丙二醇單甲基醚,PGMEA表示丙二醇單甲基醚乙酸酯。各添加量以質量份表示。
(有機下層膜之調整) 於氮氣環境下,於100mL四口燒瓶中加入咔唑(6.69 g、0.040mol、東京化成工業(股)製)、9-茀酮(7.28g、0.040mol、東京化成工業(股)製)、對甲苯磺酸一水合物(0.76g、0.0040mol、東京化成工業(股)製),製備1,4-二噁烷(6.69g、關東化學(股)製)並攪拌,昇溫至100℃為止使溶解且開始聚合。24小時後放冷至60℃為止後,加入氯仿(34g、關東化學(股)製)並稀釋,使其再沈澱至甲醇(168g、關東化學(股)製)。使得到的沈澱物過濾,以減壓乾燥機乾燥80℃、24小時,得到作為目標之聚合物(式(6-1)、以下簡稱為PCzFL)9.37g。PCzFL之1
H-NMR的測定結果如以下。1
H-NMR(400MHz,DMSO-d6
):δ7.03-7.55(br,12H),δ7.61-8.10(br,4H),δ11.18(br,1H) PCzFL之使用GPC分析以聚苯乙烯換算所測定的重量平均分子量Mw為2800、多分散度性Mw/Mn為1.77。 於得到樹脂20g中,作為交聯劑使四甲氧基甲基甘脲(Mitsui Cytec Ltd.(股)製、商品名POWDER LINK 1174) 3.0g、作為觸媒使吡啶鎓對甲苯磺酸酯0.30g、作為界面活性劑混合MEGAFACR-30(DIC(股)製、商品名)0.06g,使溶解於丙二醇單甲基醚乙酸酯88g並成為溶液。之後,使用孔徑0.10μm之聚乙烯製微過濾器且過濾,更進一步,使用孔徑0.05μm的聚乙烯製微過濾器且過濾,調製了採用多層膜的微影術製程所使用之有機下層膜形成組成物的溶液。
(溶劑耐性、顯影液溶解性試驗) 使用旋轉器將以實施例1~實施例11、比較例1所調製之含有Si之塗佈液,各自塗佈於矽晶圓上。在加熱板上以180℃加熱1分鐘,各自形成含有Si之阻劑下層膜。之後,使丙二醇單甲基醚/丙二醇單甲基醚乙酸酯=7/3之溶劑塗佈於含有Si之阻劑下層膜上,以旋轉乾燥,評估於溶劑塗佈前後之膜厚有無變化。膜厚變化1%以下者為「良好」、膜厚變化1%以上者為「未硬化」。 又,同樣方式使以實施例1~實施例11、比較例1所調製之含有Si之塗佈液使用旋轉器,各自塗佈於矽晶圓上。在加熱板上以180℃加熱1分鐘,各自形成含有Si之阻劑下層膜。之後,塗佈鹼性顯影液(氫氧化四甲基銨(TMAH) 2.38%水溶液)於含有Si之阻劑下層膜上,旋轉乾燥,評估於溶劑塗佈前後之膜厚有無變化。膜厚變化90%以上者為「良好」、膜厚變化90%以下者為「未溶解」。 進一步,同樣方式使以實施例1~實施例11、比較例1所調製之含有Si之塗佈液使用旋轉器,各自塗佈於矽晶圓上。在加熱板上以180℃加熱1分鐘,各自形成含有Si之阻劑下層膜。之後,使用(股)尼康製NSR-S307E掃描儀(波長193nm、NA、σ:0.85),不通過遮罩而使Si晶圓全面進行ArF曝光。之後,使鹼性顯影液(TMAH2.38%水溶液)塗佈於含有Si之阻劑下層膜上,旋轉乾燥,評估於溶劑塗佈前後之膜厚有無變化。膜厚變化90%以上者為「良好」、膜厚變化90%以下者為「未溶解」。又,「――」為未進行評估。
[以ArF曝光評估阻劑圖型] (評估阻劑圖型化:進行鹼顯影且經由PTD步驟之評估) 使上述式(6-1)所得到的有機下層膜(A層)形成組成物塗佈於矽晶圓上,在加熱板上以240℃烘烤60秒,得到膜厚200nm的有機下層膜(A層)。各自於其上,塗佈實施例2、4、6、8、10、11、比較例1所得到的含有Si之阻劑下層膜(B層)形成組成物,在加熱板上以180℃烘烤60秒,得到含有Si之阻劑下層膜(B層)。含有Si之阻劑下層膜(B層)的膜厚為40nm。 在B層上使市售的ArF用阻劑溶液(JSR(股)製、商品名:AR2772JN)藉由旋轉器各自塗佈,在加熱板上以110℃加熱1分鐘,形成膜厚120nm的光阻膜(C層)。 使用(股)尼康製NSR-S307E掃描儀(波長193nm、NA、σ:0.85、0.93/0.85),於顯影後光阻的線寬及其線間的寬為0.062μm,即如形成0.062μm的線/間距(L/S)=1/1的密集線般,各自經由設定之遮罩進行曝光。之後,加熱板上以100℃烘烤60秒,冷卻後,使用2.38%鹼性水溶液顯影60秒,在阻劑下層膜(B層)上形成正型的圖型。關於得到的光阻圖型,較大的圖型剝離或側蝕、線底部的增厚(基腳)未產生者評估為良好。又,「――」為未進行評估。
[以KrF曝光評估阻劑圖型] (評估阻劑圖型化:進行鹼顯影且經由PTD步驟評估) 塗佈上述式(6-1)所得到的有機下層膜(A層)形成組成物於矽晶圓上,在加熱板上以240℃烘烤60秒,得到膜厚200nm之有機下層膜(A層)。於其上,塗佈實施例9、比較例1所得到的含有Si之阻劑下層膜(B層)形成組成物,在加熱板上以180℃烘烤60秒,得到含有Si之阻劑下層膜(B層)。含有Si之阻劑下層膜(B層)之膜厚為80nm。 在B層之上,使市售之KrF用阻劑溶液藉由旋轉器各自塗佈,在加熱板上以120℃加熱1分鐘,形成膜厚400nm的光阻膜(C層)。 使用(股)尼康製NSR-S205C掃描儀(波長248nm、NA、σ:0.75、σ:0.85、習用(conventional)),於顯影後光阻之線寬及其線間之寬為0.16μm,即如形成0.16μm之線/間距(L/S)=1/1的密集線般,各自經由設定之遮罩進行曝光。之後,加熱板上以120℃烘烤60秒,冷卻後使用2.38%鹼性水溶液顯影60秒,在阻劑下層膜(B層)上形成正型的圖型。有關得到的光阻圖型,較大的圖型剝離或極端的側蝕、線底部的增厚(基腳)未產生者評估為良好。 更進一步由截面觀察,含有Si之阻劑下層膜藉由顯影液完全除去者評估為「良好」、未除去者評估為「未除去」。
本發明,作為ArF、KrF、EUV阻劑下層膜有用於形成良好的圖型,以鹼性顯影液於阻劑顯影時,同時可除去阻劑下層膜。因此,有用於以光阻之曝光後的顯影所使用的鹼性顯影液,使與光阻之顯影同時存在其下層之阻劑下層膜亦按照阻劑圖型同時除去之步驟。
Claims (10)
- 一種微影術用阻劑下層膜形成組成物,其係形成微影術用阻劑下層膜用之組成物,該微影術用阻劑下層膜為含有矽之膜,為在上層阻劑的顯影時與該上層阻劑共同按照阻劑圖型被鹼性顯影液溶解除去之膜,前述組成物為,含有(a)水解性矽烷、該水解物、該水解縮合物、或含有該等之組合的矽烷化合物,更進一步前述組成物為具有使(b)對於鹼性顯影液之溶解誘發要素作為與前述成分(a)獨立之要素,或者作為前述成分(a)的化合物的構造要素,前述要素(b)的對於鹼性顯影液之溶解誘發要素,包含於前述成分(a)的化合物的構造,前述成分(a)含有(b1)式(1)所表示之水解性矽烷、該水解物、該水解縮合物、或該等之組合,相對全矽烷,含有以式(1)所表示之水解性矽烷30莫耳%~100莫耳%,R1 aR2 bSi(R3)4-(a+b) 式(1)[式(1)中R1為含有酚性羥基之有機基、或含有式(1-1)、式(1-2)、式(1-3)、式(1-4)、或者式(1-5)之有機基:
- 如請求項1記載之微影術用阻劑下層膜形成組成物,其中,前述水解性矽烷為,式(1)的水解性矽烷、其他的水解性矽烷、或其組合,其他的水解性矽烷為,式(2)及式(3):R4 eSi(R5)4-e 式(2)[(式(2)中R4為烷基、芳基、鹵化烷基、鹵化芳基、烷氧基芳基、烷氧基烷氧基芳基、醯氧基芳基、含有酸不安定基之芳基、烯基、或具有環氧基、丙烯醯基、甲基丙烯醯基、巰基、或者氰基之有機基,且為藉由Si-C鍵結與矽原子鍵結者,R5表示烷氧基、醯基氧基、或鹵素原子,e表示0~3的整數),及〔R6 cSi(R7)3-c〕2Yd 式(3)(式(3)中R6為烷基,且為藉由Si-C鍵結與矽原子鍵結者,R7表示烷氧基、醯基氧基、或鹵素原子,Y表示伸烷基或伸芳基,c表示0或1的整數,d為0或1的整數)]所表示之有機矽化合物所構成之群選出之至少1種的有機矽化合物。
- 如請求項2記載之微影術用阻劑下層膜形成組成物, 其中,含有使請求項1所規定之式(1)的水解性矽烷,與請求項2所規定之式(2)的水解性矽烷之水解物作為聚合物。
- 如請求項1記載之微影術用阻劑下層膜形成組成物,其中,更進一步,含有酸。
- 如請求項1記載之微影術用阻劑下層膜形成組成物,其中,更進一步,含有水。
- 一種微影術用阻劑下層膜之製造方法,其特徵為,含有將請求項1~請求項5中任1項記載之微影術用阻劑下層膜形成組成物塗佈於半導體基板上之步驟、以及將前述微影術用阻劑下層膜形成組成物燒成之步驟。
- 一種半導體裝置之製造方法,其中,包含將請求項1~請求項5中任1項記載之微影術用阻劑下層膜形成組成物塗佈於半導體基板上之步驟(I),將前述微影術用阻劑下層膜形成組成物燒成且形成微影術用阻劑下層膜之步驟(II),於前述下層膜的表面塗佈阻劑用組成物且形成阻劑膜之步驟(III),曝光前述阻劑膜之步驟(IV),使阻劑顯影並按照阻劑圖型以鹼性顯影液除去微影術用阻劑下層膜而得到阻劑圖型及其轉印之阻劑圖型的步驟 (V)、以及藉由圖型化之阻劑與微影術用阻劑下層膜加工半導體基板之步驟(VI)。
- 如請求項7記載之半導體裝置之製造方法,其中,包含於(VI)步驟後,使基板加工所使用之阻劑下層膜以鹼性水溶液除去之步驟。
- 一種半導體裝置之製造方法,其特徵包含,於半導體基板的表面形成有機下層膜之步驟(i),於前述有機下層膜的表面塗佈請求項1~請求項5中任1項記載之微影術用阻劑下層膜形成組成物之步驟(ii),將前述微影術用阻劑下層膜形成組成物燒成且形成微影術用阻劑下層膜之步驟(iii),於前述微影術用阻劑下層膜的表面,塗佈阻劑用組成物,形成阻劑膜之步驟(iv),曝光前述阻劑膜之步驟(v),於曝光後使阻劑顯影並按照阻劑圖型以鹼性顯影液除去微影術用阻劑下層膜而得到阻劑圖型及其轉印之阻劑圖型的步驟(vi),藉由圖型化之微影術用阻劑下層膜蝕刻有機下層膜之步驟(vii),以及,藉由圖型化之有機下層膜加工半導體基板之步驟(viii)。
- 如請求項9記載之半導體裝置之製造方法,其中,含有於(viii)步驟之後,使基板加工所使用之阻劑下層膜以鹼性水溶液除去之步驟。
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