TW201840626A - 著色感光性樹脂組合物及由其製備之遮光間隔區 - Google Patents
著色感光性樹脂組合物及由其製備之遮光間隔區 Download PDFInfo
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- TW201840626A TW201840626A TW106137169A TW106137169A TW201840626A TW 201840626 A TW201840626 A TW 201840626A TW 106137169 A TW106137169 A TW 106137169A TW 106137169 A TW106137169 A TW 106137169A TW 201840626 A TW201840626 A TW 201840626A
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- resin composition
- photosensitive resin
- colored photosensitive
- group
- meth
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- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Materials For Photolithography (AREA)
- Liquid Crystal (AREA)
- Optical Filters (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Electroluminescent Light Sources (AREA)
- Epoxy Resins (AREA)
Abstract
本發明係關於一種著色感光性樹脂組合物,且係關於一種由其製備之遮光間隔區。所述著色感光性樹脂組合物包括肟酯芴基化合物作為少量的光聚合引發劑,所述著色感光性樹脂組合物能夠形成在諸如敏感度、彈性恢復率、分辨率、化學抗性、抗滲出性、電壓保持率及其類似屬性的屬性方面極佳的固化膜。因此,由所述著色感光性樹脂組合物製備之遮光間隔區可有利地用於液晶顯示器、有機EL顯示器及其類似物。
Description
本發明係關於一種感光性樹脂組合物,所述感光性樹脂組合物能夠形成在電壓保持率、抗滲出性、顯影容限及彈性恢復率方面極佳的固化膜,且係關於一種由感光性樹脂組合物製備且用於液晶顯示器、有機EL顯示器及其類似物之遮光間隔區。
最近,使用由感光性樹脂組合物製備之間隔區以便維持液晶顯示器(LCD)之液晶單元中上部透明基板與下部透明基板之間的恆定距離。在為一種藉由向注入至兩個透明基板之間的恆定間隙中的液晶材料施加電壓來驅動之電光裝置的LCD中,非常關鍵的在於維持兩個基板之間的間隙恆定。若透明基板之間的間隙不恆定,則向其施加的電壓以及穿透此區域之光的透射率可能變化,從而引起空間不均勻亮度的缺陷。根據最近對大型LCD面板的需求,甚至更關鍵的在於維持LCD中兩個透明基板之間的恆定間隙。
此類間隔區可藉由以下步驟來製備:在基板上塗佈感光性樹脂組合物且使用光罩使經塗佈之基板曝露於紫外光等等,接著使其顯影。最近,已經致力於對間隔區使用遮光材料;因此,已有效地研發各種著色感光性樹脂組合物。
最近,已提出黑色柱狀間隔區(BCS)(亦即,遮光間隔區)(其中使用著色感光性樹脂組合物來將柱狀間隔區及黑色矩陣整合至單一模組中)來簡化程序步驟。要求此遮光間隔區具有高敏感度及極佳顯影容限特性。然而,常規遮光間隔區具有如下缺陷:在上部顯示板與下部顯示板裝配之後可影響對液晶之驅動的電壓保持率(VHR)較低;或發生可致使電信號發生較差傳輸的褪色,藉此妨礙產品的可靠性。
確切而言,由著色感光性樹脂組合物製備之遮光間隔區(其本質上含有顏料)具有電壓保持率相對低的問題。先前技術文件 專利文件
(專利文件1)韓國公開專利公開案第2013-0124215號
技術問題
因此,本發明旨在提供一種著色感光性樹脂組合物,所述著色感光性樹脂組合物包括呈比常規肟酯類光聚合引發劑之量小的量形式之肟酯芴基光聚合引發劑,所述著色感光性樹脂組合物能夠形成在諸如敏感度、彈性恢復率、分辨率、化學抗性、抗滲出性、電壓保持率及其類似屬性的屬性方面極佳的固化膜,且提供一種由著色感光性樹脂組合物製備之遮光間隔區。問題解決方案
為了實現以上目標,本發明提供一種著色感光性樹脂組合物,其包括:(A)共聚物;(B)環氧樹脂或由其衍生之化合物;(C)光可聚合化合物;(D)光聚合引發劑;及(E)著色劑,其中所述光聚合引發劑(D)包括具有以下化學式1之肟酯芴基引發劑: [化學式1]。 在以上化學式1中,R1
各自獨立地為C1-20
烷基, R2
及R3
各自獨立地為C1-20
烷基、C6-20
芳基或C3-20
環烷基, A為硝基或氰基,且 X為單鍵或羰基。
為了實現另一目標,本發明提供一種由所述著色感光性樹脂組合物製備之遮光間隔區。發明有利效果
本發明之著色感光性樹脂組合物包括肟酯芴基化合物作為少量的光聚合引發劑,所述著色感光性樹脂組合物能夠形成在諸如敏感度、彈性恢復率、分辨率、化學抗性、抗滲出性、電壓保持率及其類似屬性的屬性方面極佳的固化膜。因此,由所述著色感光性樹脂組合物製備之遮光間隔區可有利地用於液晶顯示器、有機EL顯示器及其類似物。
本發明之著色感光性樹脂組合物包括:(A)共聚物;(B)環氧樹脂或由其衍生之化合物;(C)光可聚合化合物;(D)光聚合引發劑;及(E)著色劑,且在需要時可進一步包括(F)表面活性劑及/或(G)溶劑。
在本發明中,「(甲基)丙烯基」意味著「丙烯基」及/或「甲基丙烯基」,且「(甲基)丙烯酸酯」意味著「丙烯酸酯」及/或「甲基丙烯酸酯」。
在下文中,將詳細地解釋著色感光性樹脂組合物之每種組分。( A )共聚物
本發明中所使用之共聚物可包括(A-1)衍生自烯系不飽和羧酸、烯系不飽和羧酸酐或其組合之結構單元,及(A-2)衍生自含有芳環之烯系不飽和化合物之結構單元,且可進一步包括(A-3)與(A-1)及(A-2)不同的衍生自烯系不飽和化合物之結構單元。
共聚物為鹼溶性樹脂,其用於在顯影步驟中具有顯影性並且亦可發揮用於在塗佈時形成薄膜之基底及用於形成最終圖案之結構的作用。 (A-1)衍生自烯系不飽和羧酸、烯系不飽和羧酸酐或其組合之結構單元
在本發明中,結構單元(A-1)衍生自烯系不飽和羧酸、烯系不飽和羧酸酐或其組合。烯系不飽和羧酸或烯系不飽和羧酸酐為可聚合不飽和單體,其在分子中含有至少一個羧基。其特定實例可包含不飽和單羧酸,諸如(甲基)丙烯酸、丁烯酸、α-氯丙烯酸及肉桂酸;不飽和二羧酸和其酸酐,諸如順丁烯二酸、順丁烯二酸酐、反丁烯二酸、衣康酸(itaconic acid)、衣康酸酐、甲基順丁烯二酸(citraconic acid)、檸康酸酐及甲基反丁烯二酸(mesaconic acid);三價或更高價的不飽和聚羧酸及其酸酐;以及二價或更高價的聚羧酸的單[(甲基)丙烯醯氧基烷基]酯,諸如單[2-(甲基)丙烯醯氧基乙基]丁二酸酯、單[2-(甲基)丙烯醯氧基乙基]鄰苯二甲酸酯及其類似物。衍生自以上例示性化合物之結構單元可單獨或以兩種或更多種之組合形式包括在共聚物中。
以構成共聚物之結構單元之總莫耳數計,結構單元(A-1)之量可為5至65莫耳%,較佳地為10至50莫耳%。在此範圍內,顯影性可更易於維持。 (A-2)衍生自含有芳環之烯系不飽和化合物之結構單元
結構單元(A-2)衍生自含有芳環之烯系不飽和化合物。含有芳環之烯系不飽和化合物之特定實例可包含(甲基)丙烯酸苯酯、(甲基)丙烯酸苯甲酯、(甲基)丙烯酸2-苯氧基乙酯、(甲基)丙烯酸苯氧基二乙二醇酯、(甲基)丙烯酸對壬基苯氧基聚乙二醇酯、(甲基)丙烯酸對壬基苯氧基聚丙二醇酯、(甲基)丙烯酸三溴苯酯;苯乙烯;含有烷基取代基之苯乙烯,諸如甲基苯乙烯、二甲基苯乙烯、三甲基苯乙烯、乙基苯乙烯、二乙基苯乙烯、三乙基苯乙烯、丙基苯乙烯、丁基苯乙烯、己基苯乙烯、庚基苯乙烯及辛基苯乙烯;含有鹵素之苯乙烯,諸如氟苯乙烯、氯苯乙烯、溴苯乙烯及碘苯乙烯;含有烷氧基取代基之苯乙烯,諸如甲氧基苯乙烯、乙氧基苯乙烯及丙氧基苯乙烯;4-羥基苯乙烯、對羥基-α-甲基苯乙烯、乙醯基苯乙烯;乙烯基甲苯、二乙烯基苯、乙烯基苯酚、鄰乙烯基苯甲基甲基醚、間乙烯基苯甲基甲基醚、對乙烯基苯甲基甲基醚、鄰乙烯基苯甲基縮水甘油醚、間乙烯基苯甲基縮水甘油醚、對乙烯基苯甲基縮水甘油醚及其類似物。
衍生自以上例示性化合物之結構單元可單獨或以兩種或更多種之組合形式包括在共聚物中。
較佳地,以上化合物當中之苯乙烯類化合物可考慮聚合性。
以構成共聚物之結構單元之總莫耳數計,結構單元(A-2)之量可為2至70莫耳%,較佳地為5至60莫耳%。在此範圍內,化學抗性可為更有利的。 (A-3)與(A-1)及(A-2)不同的衍生自烯系不飽和化合物之結構單元
除了(A-1)及(A-2)以外,本發明中所使用之共聚物還可進一步包括與(A-1)及(A-2)不同的衍生自烯系不飽和化合物之結構單元。
與(A-1)及(A-2)不同的衍生自烯系不飽和化合物之結構單元之特定實例可包含不飽和羧酸酯,諸如(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸丁酯、(甲基)丙烯酸二甲基胺基乙酯、(甲基)丙烯酸異丁酯、(甲基)丙烯酸第三丁酯、(甲基)丙烯酸環己酯、(甲基)丙烯酸乙基己酯、(甲基)丙烯酸四氫呋喃甲酯、(甲基)丙烯酸羥基乙酯、(甲基)丙烯酸2-羥基丙酯、(甲基)丙烯酸2-羥基-3-氯丙酯、(甲基)丙烯酸4-羥基丁酯、(甲基)丙烯酸丙三醇酯、α-羥基甲基丙烯酸甲酯、α-羥基甲基丙烯酸乙酯、α-羥基甲基丙烯酸丙酯、α-羥基甲基丙烯酸丁酯、(甲基)丙烯酸2-甲氧基乙酯、(甲基)丙烯酸3-甲氧基丁酯、(甲基)丙烯酸乙氧基二乙二醇酯、(甲基)丙烯酸甲氧基三乙二醇酯、(甲基)丙烯酸甲氧基三丙二醇酯、聚(乙二醇)甲基醚(甲基)丙烯酸酯、(甲基)丙烯酸四氟丙酯、(甲基)丙烯酸1,1,1,3,3,3-六氟異丙酯、(甲基)丙烯酸八氟戊酯、(甲基)丙烯酸十七氟癸酯、(甲基)丙烯酸異冰片酯、(甲基)丙烯酸二環戊酯、(甲基)丙烯酸二環戊烯酯、(甲基)丙烯酸二環戊氧基乙酯及(甲基)丙烯酸環戊烯氧基乙酯等;含有N-乙烯基的第三胺,諸如N-乙烯基吡咯烷酮、N-乙烯基咔唑及N-乙烯基嗎啉;不飽和醚,諸如乙烯基甲基醚及乙烯基乙基醚;含有環氧基的烯系不飽和化合物,諸如(甲基)丙烯酸縮水甘油酯、(甲基)丙烯酸3,4-環氧基丁酯、(甲基)丙烯酸4,5-環氧基戊酯、(甲基)丙烯酸5,6-環氧基己酯、(甲基)丙烯酸6,7-環氧基庚酯、(甲基)丙烯酸2,3-環氧環戊酯、(甲基)丙烯酸3,4-環氧環己酯、丙烯酸α-乙基縮水甘油酯、丙烯酸α-正丙基縮水甘油酯、丙烯酸α-正丁基縮水甘油酯、N-(4-(2,3-環氧基丙氧基)-3,5-二甲基苯甲基)丙烯醯胺、N-(4-(2,3-環氧基丙氧基)-3,5-二甲基苯基丙基)丙烯醯胺、(甲基)丙烯酸4-羥基丁酯縮水甘油醚、烯丙基縮水甘油醚及2-甲基烯丙基縮水甘油醚等;以及不飽和醯亞胺,諸如N-苯基順丁烯二醯亞胺、N-(4-氯苯基)順丁烯二醯亞胺、N-(4-羥基苯基)順丁烯二醯亞胺、N-環己基順丁烯二醯亞胺及其類似物。
衍生自以上例示性化合物之結構單元可單獨或以兩種或更多種的組合形式包括在共聚物中。
其中,鑒於絕緣膜強度之可共聚合性及改良,衍生自含有環氧基及/或不飽和醯亞胺之烯系不飽和化合物之結構單元(確切而言,(甲基)丙烯酸縮水甘油酯、(甲基)丙烯酸4-羥基丁酯縮水甘油醚及/或N-取代的順丁烯二醯亞胺)可為更佳的。
以構成共聚物之結構單元之總莫耳數計,結構單元(A-3)之量可為10至80莫耳%,較佳地為20至75莫耳%。在此範圍內,可維持著色感光性樹脂組合物之儲存穩定性,且可更有利地改良薄膜保留率。
具有結構單元(A-1)至(A-3)之共聚物之實例可包含以下共聚物:(甲基)丙烯酸/苯乙烯的共聚物;(甲基)丙烯酸/(甲基)丙烯酸苯甲酯的共聚物;(甲基)丙烯酸/苯乙烯/(甲基)丙烯酸甲酯的共聚物;(甲基)丙烯酸/苯乙烯/(甲基)丙烯酸甲酯/(甲基)丙烯酸縮水甘油酯的共聚物;(甲基)丙烯酸/苯乙烯/(甲基)丙烯酸甲酯/(甲基)丙烯酸縮水甘油酯/N-苯基順丁烯二醯亞胺的共聚物;(甲基)丙烯酸/苯乙烯/(甲基)丙烯酸甲酯/(甲基)丙烯酸縮水甘油酯/N-
環己基順丁烯二醯亞胺的共聚物;(甲基)丙烯酸/苯乙烯/(甲基)丙烯酸正丁酯/(甲基)丙烯酸縮水甘油酯/N-苯基順丁烯二醯亞胺的共聚物;(甲基)丙烯酸/苯乙烯/(甲基)丙烯酸縮水甘油酯/N-苯基順丁烯二醯亞胺的共聚物;(甲基)丙烯酸/苯乙烯/(甲基)丙烯酸4-羥基丁酯縮水甘油醚/N-苯基順丁烯二醯亞胺的共聚物及其類似物。
著色感光性樹脂組合物中可包括一種、兩種或更多種所述共聚物。
當藉由參考聚苯乙烯之凝膠滲透色譜法(溶離劑:四氫呋喃)進行判定時,共聚物之重均分子量(Mw)可介於10,000至20,000的範圍內,較佳地為15,000至18,000。在此範圍內,可有利地改良下部圖案之階差,且在顯影之後的圖案概況可為有利的。
以著色感光性樹脂組合物之固體含量的總重量(亦即,排除溶劑之重量)計,可使用呈5至40 wt%,較佳地為10至30 wt%之量的共聚物。在此範圍內,在顯影之後的圖案概況可為有利的,且可改良諸如薄膜保留率及化學抗性之屬性。
可藉由以下步驟來製備共聚物:向反應器填充分子量改性劑、自由基聚合引發劑、溶劑及結構單元(A-1)至(A-3)以及至其之氮氣,接著緩慢地攪拌混合物以發生聚合反應。
分子量改性劑可為諸如丁硫醇、辛硫醇或其類似物之硫醇化合物,或α-甲基苯乙烯二聚體,但不受其特別限制。
自由基聚合引發劑可為偶氮化合物,諸如(但不限於)2,2'-偶氮二異丁腈、2,2'-偶氮雙(2,4-二甲基戊腈)以及2,2'-偶氮雙(4-甲氧基-2,4-二甲基戊腈);或過氧化苯甲醯、過氧化十二烷基、過氧化特戊酸第三丁酯、1,1-雙(第三丁基過氧基)環己烷或其類似物。自由基聚合引發劑可單獨或以兩種或更多種的組合形式使用。
此外,溶劑可為通常用於製備共聚物之任何常規溶劑且可包含例如丙二醇單甲基醚乙酸酯(PGMEA)。( B ) 環氧樹脂或由其衍生之化合物
本發明之著色感光性樹脂組合物包括環氧樹脂或由其衍生之化合物。
較佳地,環氧樹脂或由其衍生之化合物可具有卡哆主鏈結構。
作為較佳實例,環氧樹脂可為具有卡哆主鏈結構之環氧樹脂化合物,如由以下化學式2表示。 [化學式2]
在以上化學式2中,X各自獨立地為、、或;L1
各自獨立地為C1-10
亞烷基、C3-20
亞環烷基或C1-10
亞烷氧基;R1
至R7
各自獨立地為H、C1-10
烷基、C1-10
烷氧基、C2-10
烯基或C6-14
芳基;R8
為H、甲基、乙基、CH3
CHCl-、CH3
CHOH-、CH2
=CHCH2
-或苯基;且n為0至10的整數。
C1-10
亞烷基之特定實例可包含亞甲基、亞乙基、亞丙基、亞異丙基、亞丁基、亞異丁基、第二亞丁基、第三亞丁基、亞戊基、亞異戊基、第三亞戊基、亞己基、亞庚基、亞辛基、亞異辛基、第三亞辛基、2-乙基亞己基、亞壬基、亞異壬基、亞癸基、亞異癸基及其類似基團。C3-20
亞環烷基之特定實例可包含亞環丙基、亞環丁基、亞環戊基、亞環己基、亞環庚基、亞十氫萘基、亞金剛烷基及其類似基團。C1-10
亞烷基氧基之特定實例可包含亞甲基氧基、亞乙基氧基、亞丙基氧基、亞丁基氧基、第二亞丁基氧基、第三亞丁基氧基、亞戊基氧基、亞己基氧基、亞庚基氧基、亞辛基氧基、2-乙基-亞己基氧基及其類似基團。C1-10
烷基之特定實例可包含甲基、乙基、丙基、異丙基、丁基、異丁基、第二丁基、第三丁基、戊基、異戊基、第三戊基、己基、庚基、辛基、異辛基、第三辛基、2-乙基己基、壬基、異壬基、癸基、異癸基及其類似基團。C1-10
烷氧基之特定實例可包含甲氧基、乙氧基、丙氧基、丁氧基、第二丁基、第三丁基、戊氧基、己氧基、庚氧基、辛氧基、2-乙基-己氧基及其類似基團。C2-10
烯基之特定實例可包含乙烯基、烯丙基、丁烯基、丙烯基及其類似基團。C6-14
芳基之特定實例可包含苯基、甲苯基、二甲苯基、萘基及其類似基團。
舉例而言,可藉由以下合成途徑製備具有卡哆主鏈結構之環氧樹脂: [反應方案1]
在以上反應方案1中,Hal為鹵基;且X、R1 、
R2
及L1
與在以上化學式2中所定義的相同。
可藉由以下反應獲得由具有卡哆主鏈結構之環氧樹脂衍生之化合物:使具有卡哆主鏈結構之環氧樹脂與不飽和鹼性酸反應以產生環氧樹脂加合物,且接著使因此獲得之環氧樹脂加合物與多元酸酐反應,或藉由進一步使因此獲得之產物與單官能或多官能環氧化合物反應。可使用所屬領域中已知的任何不飽和鹼性酸,例如,丙烯酸、甲基丙烯酸、丁烯酸、肉桂酸、山梨酸及其類似酸。可使用所屬領域中已知的任何多元酸酐,例如,丁二酸酐、順丁烯二酸酐、偏苯三酸酐、苯均四酸酐、1,2,4,5-環己烷四甲酸二酐、六氫鄰苯二甲酸酐及其類似酸酐。可使用所屬領域中已知的任何單官能或多官能環氧化合物,例如,甲基丙烯酸縮水甘油酯、甲基縮水甘油醚、乙基縮水甘油醚、丙基縮水甘油醚、異丙基縮水甘油醚、丁基縮水甘油醚、異丁基縮水甘油醚、雙酚Z縮水甘油醚及其類似環氧化合物。
舉例而言,可藉由以下合成途徑製備由具有卡哆主鏈結構之環氧樹脂衍生之化合物: [反應方案2]
在以上反應方案2中,R9
各自獨立地為H、C1-10
烷基、C1-10
烷氧基、C2-10
烯基或C6-14
芳基;R10
及R11
各自獨立地為飽和或不飽和C6
芳環或脂環;n為1至10的整數;且X、R1 、
R2
及L1
與化學式3中所定義的相同。
當使用具有卡哆主鏈結構之環氧樹脂或由環氧樹脂衍生之化合物時,卡哆主鏈結構可改進固化材料與基板之間的黏著性、耐鹼性、可加工性、強度及其類似屬性。此外,一旦在顯影後去除未固化部分,圖案中即可形成具有精細分辨率之影像。
當藉由參考聚苯乙烯之凝膠滲透色譜法(溶離劑:四氫呋喃)進行判定時,環氧樹脂或由其衍生之化合物之重均分子量(Mw)可介於3,000至18,000的範圍內,較佳地為5,000至10,000。在此範圍內,可有利地改良下部圖案之階差,且在顯影之後之圖案概況可為有利的。
以著色感光性樹脂組合物之固體含量之總重量(亦即,排除溶劑之重量)計,環氧樹脂或由其衍生之化合物之量可為5至30 wt%,較佳地為10至25 wt%。在此範圍內,在顯影之後之圖案概況可為有利的,且可改良諸如化學抗性及彈性復原力之屬性。( C )光可聚合化合物
本發明中所使用之光可聚合化合物可為可藉由聚合引發劑作用而聚合之任何化合物,且可為通常用於製備著色感光性樹脂組合物之多官能單體、低聚物或聚合物。
更確切而言,光可聚合化合物可包含具有至少一個烯系不飽和雙鍵之單官能或多官能酯化合物,且考慮化學抗性,較佳地可為具有至少兩個官能團之多官能化合物。
可聚合化合物可選自(但不限於)由以下組成的組:乙二醇二(甲基)丙烯酸酯、丙二醇二(甲基)丙烯酸酯、二乙二醇二(甲基)丙烯酸酯、三乙二醇二(甲基)丙烯酸酯、1,6-己二醇二(甲基)丙烯酸酯、聚乙二醇二(甲基)丙烯酸酯、聚丙二醇二(甲基)丙烯酸酯、丙三醇三(甲基)丙烯酸酯、三(甲基)丙烯酸三羥甲基丙烷酯、三(甲基)丙烯酸季戊四醇酯、三(甲基)丙烯酸季戊四醇酯與丁二酸的單酯、四(甲基)丙烯酸季戊四醇酯、五(甲基)丙烯酸二季戊四醇酯、六(甲基)丙烯酸二季戊四醇酯、五(甲基)丙烯酸二季戊四醇酯與丁二酸的單酯、己內酯改性的六(甲基)丙烯酸二季戊四醇酯、季戊四醇三丙烯酸酯-六亞甲基二異氰酸酯(季戊四醇三丙烯酸酯與六亞甲基二異氰酸酯的反應產物)、七(甲基)丙烯酸三季戊四醇酯、八(甲基)丙烯酸三季戊四醇酯、雙酚A環氧基丙烯酸酯、乙二醇單甲醚丙烯酸酯及其混合物。
市售可聚合化合物之實例可包含(i)單官能(甲基)丙烯酸酯,諸如由Toagosei Co., Ltd.製造之Aronix M-101、M-111及M-114;由Nippon Kayaku Co., Ltd.製造之KAYARAD T4-110S及T4-120S;以及由Osaka Yuki Kayaku Kogyo Co., Ltd.製造之V-158及V-2311;(ii)雙官能(甲基)丙烯酸酯,諸如由Toagosei Co., Ltd.製造之Aronix M-210、M-240及M-6200;由Nippon Kayaku Co., Ltd.製造之KAYARAD HDDA、HX-220及R-604;以及由Osaka Yuki Kayaku Kogyo Co., Ltd.製造之V-260、V-312及V-335 HP;以及(iii)三官能性和更多官能性(甲基)丙烯酸酯,諸如由Toagosei Co., Ltd.製造之Aronix M-309、M-400、M-403、M-405、M-450、M-7100、M-8030、M-8060及TO-1382;由Nippon Kayaku Co., Ltd.製造之KAYARAD TMPTA、DPHA、DPHA-40H、DPCA-20、DPCA-30、DPCA-60及DPCA-120;以及由Osaka Yuki Kayaku Kogyo Co., Ltd.製造之V-295、V-300、V-360、V-GPT、V-3PA、V-400及V-802。
以著色感光性樹脂組合物之固體含量(亦即,排除溶劑之重量)之總重量計,光可聚合化合物之量為10至40 wt%,較佳地為15至25 wt%。在此範圍內,在顯影之後之圖案概況可為有利的,且可改良諸如化學抗性及彈性復原力之屬性。若量小於10 wt%,則顯影時間可延長,此可影響程序及殘基。如果以超過40 wt%之量使用光可聚合化合物,則此可造成圖案分辨率增大且表面皺折增加的問題。( D )光聚合引發劑
本發明之著色感光性樹脂組合物包括如光聚合引發劑之以下化學式1之肟酯芴基引發劑: [化學式1]。 在以上化學式1中,R1
各自獨立地為C1-20
烷基, R2
及R3
各自獨立地為C1-20
烷基、C6-20
芳基或C3-20
環烷基, A為硝基或氰基,且 X為單鍵或羰基。
較佳地,R1
各自獨立地為甲基、乙基、正丙基、異丙基、正丁基、異丁基、第三丁基、正戊基、異戊基、正己基或異己基,且
R2
及R3
各自獨立地為甲基、乙基、正丙基、異丙基、正丁基、異丁基、第三丁基、正戊基、異戊基、正己基、異己基、苯基、萘基、聯苯基、三聯苯基、蒽基、茚基或菲基。
可根據常規方法合成肟酯芴基光聚合引發劑或可商業購買。
化學式1之肟酯芴基光聚合引發劑充當著色感光性樹脂組合物之交聯劑,同時肟酯芴基光聚合引發劑甚至在少量使用時亦能夠提供足夠高的敏感度特性,且能夠改良彈性恢復率、分辨率、化學抗性、抗滲出性及電壓保持率。尤其,因為著色感光性樹脂組合物本質上使用著色劑,所以使驅動(或對準)液晶所需要的足夠電壓維持率固定係困難的。但肟酯芴基光聚合引發劑使得有可能提供高電壓保持率。
本發明之著色感光性樹脂組合物可進一步包括可為任何已知光聚合引發劑的其他光聚合引發劑。
另外光聚合引發劑可選自由以下組成的組:苯乙酮化合物、非咪唑化合物、鎓鹽化合物、安息香化合物、苯甲酮化合物、二酮化合物、α-二酮化合物、多核醌化合物、噻噸酮化合物、重氮化合物、醯亞胺磺酸酯化合物、咔唑化合物、硼酸鋶化合物及其混合物。
以著色感光性樹脂組合物之固體含量之總重量(亦即,排除溶劑之重量)計,可以0.05至5 wt%、0.1至5 wt%、0.05至3 wt%、0.05至1 wt%、0.05至0.5 wt%、0.05至0.2 wt%之量使用光聚合引發劑。在此範圍內,可獲得具有高敏感度以及極佳電壓保持率及抗滲出性之塗佈薄膜。( E )著色劑
本發明之著色感光性樹脂組合物包括著色劑以賦予其遮光性。組合物包括如上文所描述之肟酯芴基光聚合引發劑,藉此歸因於使用著色劑,會防止以其他方式發生的褪色,繼而改良抗滲出性。
本發明中所使用之著色劑可為兩種或更多種無機或有機著色劑的混合物。其較佳地具有高產色性及高抗熱性。
尤其,若一起使用兩種或更多種有機著色劑,則防止黑色矩陣漏光及使能夠進行光罩對準之透射率固定可為較有利的。
此外,著色劑可包括黑色著色劑及藍色著色劑,其中黑色著色劑可為黑色無機著色劑及/或黑色有機著色劑。
根據一實例,著色感光性樹脂組合物可包括黑色有機著色劑作為著色劑;且視情況可進一步包括黑色無機著色劑及藍色著色劑。
著色劑可為選自由黑色無機著色劑、黑色有機著色劑及藍色著色劑組成之組的至少一種著色劑。舉例而言,可使用在顏色指數(由染料和顏料學會(The Society of Dyers and Colourists)發佈)中歸類為顏料之任何化合物及所屬領域中已知的任何染料。
黑色無機著色劑之特定實例可包含碳黑、鈦黑、諸如Cu-Fe-Mn類氧化物之金屬氧化物及合成鐵黑以及其類似物。其中針對所要圖案特性及化學抗性,較佳的為碳黑。
此外,黑色有機著色劑之特定實例可包含苯胺黑、內醯胺黑、苝黑及其類似著色劑。其中針對所要光密度(OD)、介電性及其類似屬性,較佳的為內醯胺黑(例如來自BASF的Black 582)。
藍色著色劑之特定實例可包含C.I.顏料藍15:6、C.I.顏料藍15:4、C.I.顏料藍60、C.I.顏料藍16及其類似顏料藍。其中針對防止漏光,較佳的為C.I.顏料藍15:6。
以著色感光性樹脂組合物之固體含量之總重量(亦即,排除溶劑之重量)計,黑色無機著色劑的量可為0至20 wt%,較佳地為大於0至20 wt%,更佳地為大於0至6 wt%。
以著色感光性樹脂組合物之固體含量之總重量(亦即,排除溶劑之重量)計,黑色有機著色劑之量可為10至40 wt%。
以著色感光性樹脂組合物之固體含量之總重量(亦即,排除溶劑之重量)計,藍色著色劑的量可為0至15 wt%,較佳地為1至15 wt%。
以著色感光性樹脂組合物之固體含量之總重量(亦即,排除溶劑之重量)計,著色劑之總量可為10至75 wt%,較佳地為20至60 wt%。在此範圍內,在顯影之後的圖案概況可為有利的,且可改良諸如化學抗性及彈性復原力之屬性。若量小於20 wt%或超過60 wt%,則可能不會達成所要光密度及透射率。
同時,可使用分散劑來使著色劑在本發明之著色感光性樹脂組合物中分散。分散劑之實例可包含針對著色劑之任何已知分散劑。分散劑之特定實例可包含陽離子表面活性劑、陰離子表面活性劑、非離子表面活性劑、兩性離子表面活性劑、矽表面活性劑、氟表面活性劑及其類似分散劑。市售分散劑可包含來自BYK Co.之Disperbyk-182、Disperbyk-183、Disperbyk-184、Disperbyk-185、Disperbyk-2000、Disperbyk-2150、Disperbyk-2155、Disperbyk-2163及Disperbyk-2164。此等化合物可單獨或與以兩種或更多種的組合形式使用。可藉由對著色劑與分散劑進行表面處理而預先將分散劑添加至著色劑或可在製備著色感光性樹脂組合物時將分散劑與著色劑添加在一起。
此外,可將著色劑與黏合劑混合,接著可將其用於產生著色感光性樹脂組合物。本文中所使用之黏合劑可為本發明中所描述之共聚物(A)、已知共聚物或其混合物。
因此,可以如與分散劑、黏合劑、溶劑或其類似物混合的漆漿之形式將本發明中所使用之著色劑添加至著色感光性樹脂組合物。( F )表面活性劑
本發明之著色感光性樹脂組合物可進一步包括表面活性劑以便改良可塗佈性且防止產生缺陷。
儘管表面活性劑之種類不受特別限制,但可使用例如基於氟之表面活性劑或基於矽之表面活性劑。
市售基於矽之表面活性劑可包含來自Dow Corning Toray Silicon之DC3PA、DC7PA、SH11PA、SH21PA及SH8400;來自GE Toshiba Silicone之TSF-4440、TSF-4300、TSF-4445、TSF-4446、TSF-4460及TSF-4452;來自BYK之BYK 333、BYK 307、BYK 3560、BYK UV 3535、BYK 361N、BYK 354及BYK 399以及其類似物。表面活性劑可單獨使用或以兩種或更多種的組合形式使用。
市售基於氟之表面活性劑可包含來自Dainippon Ink Kagaku Kogyo Co.(DIC)之Megaface F-470、F-471、F-475、F-482、F-489及F-563。在可塗佈性方面,其中較佳的表面活性劑可為來自BYK之BYK 333及BYK 307以及來自DIC之F-563。
以著色感光性樹脂組合物之固體含量之總重量(亦即,排除溶劑之重量)計,表面活性劑的量可為0.01至3 wt%,較佳地為0.1至1 wt%。在此範圍內,可對著色感光性樹脂組合物進行光滑塗佈。( G ) 溶劑
較佳地,可將本發明之著色感光性樹脂組合物製備為液體組合物,其中將以上組分及溶劑混合。所屬領域中已知的任何溶劑可用於製備著色感光性樹脂組合物,所述溶劑與著色感光性樹脂組合物中之組分相容而不與其反應。
溶劑的實例可包含:諸如乙二醇單乙醚的乙二醇醚;諸如乙基乙二醇乙酸乙醚的乙二醇烷基醚乙酸酯;諸如乙基2-羥基丙酸酯的酯;諸如二乙二醇單甲基醚的二乙二醇;諸如丙二醇單甲基醚乙酸酯及丙二醇丙基醚乙酸酯的丙二醇烷基醚乙酸酯;及諸如3-甲氧基丁基乙酸酯的烷氧基烷基乙酸酯。溶劑可單獨使用或以兩種或更多種的組合形式使用。
以著色感光性樹脂組合物之總重量計,溶劑之量可為50至90 wt%,較佳地為70至85 wt%。在此範圍內,可對組合物進行光滑塗佈,且可改良可在程序期間以其他方式發生的任何延遲容限。
另外,本發明之著色感光性樹脂組合物可包括諸如矽烷偶合劑、抗氧化劑及穩定劑之其他添加劑,只要著色感光性樹脂組合物之物理屬性不受不利影響即可。
因此,如上文所描述之著色感光性樹脂組合物包括肟酯芴基化合物作為少量的光聚合引發劑,所述著色感光性樹脂組合物能夠形成在諸如敏感度、彈性恢復率、分辨率、化學抗性、抗滲出性、電壓保持率及其類似屬性之屬性方面極佳的固化膜。因此,由所述著色感光性樹脂組合物製備之遮光間隔區可有利地用於液晶顯示器、有機EL顯示器及其類似物。
可藉由例如以下方法的常見方法製備包括上文所描述之組分的本發明之著色感光性樹脂組合物。
首先,預先使用珠磨機將著色劑與溶劑混合且使著色劑分散在溶劑中,直至著色劑之平均粒徑達到所要值為止。此時,可使用表面活性劑,或可摻合共聚物之部分或整體。將以下各物添加至因此獲得的分散液:共聚物及表面活性劑、環氧樹脂或由環氧樹脂衍生之化合物、光可聚合化合物及光聚合引發劑之剩餘部分。若需要,可進一步在某一濃度上添加諸如矽烷偶合劑或額外溶劑之添加劑,接著充分攪拌所述添加劑以獲得所要著色感光性樹脂組合物。
本發明還提供一種藉由使著色感光性樹脂組合物固化而製造的遮光間隔區。較佳地,本發明提供由著色感光性樹脂組合物製備之黑色柱狀間隔區(BCS),其中將柱狀間隔區及黑色矩陣整合至一個模組中。
遮光間隔區的電壓保持率可為85%或大於85%、光密度可為0.5至1.5/µm,且彈性恢復率可為90%或大於90%。
可藉由塗層形成步驟、曝光步驟、顯影步驟及熱處理步驟來製造遮光間隔區。
在塗層形成步驟中,藉由旋塗法、狹縫塗佈法、滾塗法、網版印刷法、塗覆器法及其類似方法以例如1至25 µm的所要厚度在預處理的基板上塗佈根據本發明之著色感光性樹脂組合物,接著藉由去除其中的溶劑而在70至100℃的溫度下使所述著色感光性樹脂組合物預固化1至10分鐘以形成塗層。
為了在經塗佈薄膜上形成圖案,將具有預定形狀的光罩置放在薄膜上,且用200至500 nm的激活射線輻照其上具有光罩之經塗佈薄膜。此處,為了製造整合型黑色柱狀間隔區,可使用具有不同透射率之具有圖案的光罩來同時形成柱狀間隔區及黑色矩陣。可將低壓水銀燈、高壓水銀燈、超高壓水銀燈、金屬鹵化物燈、氬氣雷射器及其類似物用作用於輻照之光源;且在需要時,還可使用X射線、電子射線及其類似物。曝光量可取決於組合物之組分的種類及組成比率以及經乾燥塗層之厚度而變化。若使用高壓水銀燈,則曝光量可為500 mJ/cm2
或小於500 mJ/cm2
(在365 nm之波長下)。
在曝光步驟之後,執行將諸如碳酸鈉、氫氧化鈉、氫氧化鉀、氫氧化四甲基銨及其類似物之鹼性水溶液用作顯影溶劑之顯影步驟以溶解及去除不必要的部分,藉以僅保留曝露部分以形成圖案。將藉由顯影獲得之影像圖案冷卻至室溫,且在180至250℃的溫度下在熱氣循環型乾燥鍋爐中將所述影像圖案後烘焙10至60分鐘,藉此獲得最終圖案。
由於因此產生的遮光間隔區的極佳屬性,可將所述遮光間隔區用於製造LCD、OLED顯示器及其類似物的電子部分。因此,本發明提供一種包括遮光間隔區之電子部件。
LCD、OLED顯示器及其類似物可包括所屬領域的技術人員已知的其他組件,其例外之處在於所述裝置具備本發明之遮光間隔區。亦即,可應用本發明之遮光間隔區之LCD、OLED顯示器及其類似物可屬於本發明之範疇。
在下文中,將參考以下實例更詳細地描述本發明。然而,此等實例係為了說明本發明而闡述,且本發明之範疇並不限於此。
在以下實例中,藉由使用聚苯乙烯標準物之凝膠滲透色譜法(GPC)來判定重均分子量。合成實例 1: 製備共聚物 ( A )
將以下各物填充至配備有回流冷凝器之500 ml圓底燒瓶及攪拌器:由51莫耳%的N-苯基順丁烯二醯亞胺、4莫耳%的苯乙烯、10莫耳%的丙烯酸4-羥基丁酯縮水甘油醚及35莫耳%的甲基丙烯酸組成之100 g混合物,以及作為溶劑之300 g的丙二醇單甲基醚乙酸酯(PGMEA)及作為自由基聚合引發劑之2 g的2,2'-偶氮雙(2,4-二甲基戊腈)。接著將混合物加熱至70℃且攪拌5小時以獲得固體含量為31 wt%之共聚物。因此製備的共聚物具有100 mg KOH/g之酸值,以及藉由凝膠滲透色譜法量測的20,000的聚苯乙烯參考重均分子量(Mw)。 [表1] 合成實例 2 : 製備由環氧樹脂 ( B )衍生 之化合物 步驟(1):合成9,9-雙[4-(縮水甘油基氧基)苯基]芴
將200 g的甲苯、125.4 g的4,4'-(9-亞芴基)二苯酚及78.6 g的表氯醇填充至3,000 ml之三頸圓底燒瓶,且將所述物質加熱至40℃,其中進行攪拌以獲得溶液。在分離容器中混合0.1386 g的第三丁基溴化銨及50%的NaOH水溶液(3當量),且緩慢地將所述混合物添加至燒瓶中,在燒瓶中,正攪拌溶液。
將因此獲得的反應混合物加熱至90℃達1小時以完全消耗4,4'-(9-亞芴基)二苯酚(藉由HPLC或TLC進行確認)。將反應混合物冷卻至30℃,且將400 ml的二氯甲烷及300 ml的1 N HCl添加至反應混合物,其中進行攪拌以使有機層分離。用300 ml的蒸餾水洗滌因此獲得的有機層兩次或三次、經硫酸鎂乾燥,且在減壓下進行蒸餾以去除二氯甲烷。使用二氯甲烷與甲醇之混合物而使所得物再結晶,藉此獲得標題化合物—環氧樹脂化合物。 步驟(2):合成(((9H-芴-9,9-二基)雙(4,1-伸苯基))雙(伸氧基))雙(2-羥基丙-3,1-二基)二丙烯酸酯(CAS第143182-97-2號)
將在步驟(1)中獲得的115 g的化合物、50 mg的氯化四甲銨、50 mg的2,6-雙(1,1-二甲基乙基)-4-甲苯酚及35 g的丙烯酸填充至1,000 ml的三頸燒瓶。將混合物加熱至90至100℃,同時在25 ml/min之流動速率下吹動空氣,且進一步將混合物加熱至120℃以獲得溶液。連續地攪拌反應混合物達12小時,直至其酸值降至小於1.0 mg KOH/g為止,且接著冷卻至室溫。將300 ml的二氯甲烷及300 ml的蒸餾水添加至反應混合物,其中進行攪拌以使有機層分離。用300 ml的蒸餾水洗滌因此獲得的有機層兩次或三次、經硫酸鎂乾燥,且在減壓下進行蒸餾以去除二氯甲烷,藉此獲得標題化合物。 步驟(3):製備由環氧樹脂衍生且具有卡哆主鏈結構之化合物
在1,000 ml的三頸燒瓶中將在步驟(2)中獲得的化合物溶解在PGMEA中,且接著溶解在1,2,4,5-苯四羧酸二酐(0.75當量)中,將1,2,3,6-四氫鄰苯二甲酸酐(0.5當量)及三苯膦(0.01當量)添加至所得物。將反應混合物加熱至120至130℃,攪拌2小時,且接著冷卻至80至90℃,接著在加熱下攪拌6小時。接著將反應混合物冷卻至室溫,藉此獲得酸值為107 mg KOH/g(以固體含量計)且重均分子量(Mw)為6,000的聚合物之溶液(固體含量為49 wt%)。合成實例 3 : 製備著色分散液 ( E )
自Tokushiki Co., Ltd.供應著色分散液(E),已如下製備所述分散液。
使用油漆振盪器在25℃下使以下各物分散達6小時:8 g的丙烯酸共聚物溶液(其重均分子量為12,000至20,000 g/mol且酸值為80至150 mg KOH/g)(Tokushiki Co., Ltd.);8 g的丙烯酸聚合物分散劑(其胺值為100至140 mg KOH/g)(Tokushiki Co., Ltd.);18 g的碳黑;作為有機黑之65 g的內醯胺黑(BASF的Black 582);及作為溶劑之384 g的PGMEA。用0.3 mm的氧化鋯珠粒執行此分散步驟。在完成分散步驟後,即使用過濾器自分散液去除珠粒,藉此獲得固體含量為23 wt%的著色分散液。實例及比較實例 : 製備感光性樹脂組合物
使用在以上製備實例中製備之化合物來製備以下實例及比較實例中之感光性樹脂組合物。
在實例及比較實例中,使用以下額外組分。 [表2] 實例 1 : 製備著色感光性樹脂組合物
以固體含量之重量計,將以下各物添加至作為溶劑之(G)PGMEA中:(A)在合成實例1中製備為共聚物之3.0 g的化合物;(B)在合成實例2中製備為由環氧樹脂衍生之化合物之3.0 g的化合物;(C)作為光可聚合化合物之1.8 g的DPHA;(D)作為光聚合引發劑之0.03 g的SPI-2;(E)在合成實例3中製備為著色劑之9.80 g的著色分散液;及(F)作為表面活性劑之0.06 g的BYK-307,藉此獲得30 g的混合物。接著均質地混合所述混合物達1,藉此獲得著色感光性樹脂組合物。實例 2 至 4 及比較實例 1 至 7 : 製備著色感光性樹脂組合物
以與實例1相同的方式製備著色感光性樹脂組合物,其例外之處在於如以下表3中所展示來改變光聚合引發劑(D)之類型及/或量。
以下表3中給出的數目係基於100 wt%的樹脂組合物。 [表3] 製備黑色柱狀間隔區 ( 遮光間隔區 )
使用旋塗器在玻璃基板上各自塗佈在實例及比較實例中獲得的著色感光性樹脂組合物,且在90℃下乾燥(或預烘焙)2.5分鐘以形成經塗佈薄膜。在經塗佈薄膜上塗覆由100%全色調柱狀間隔區(CS)圖案及30%半色調黑色矩陣圖案組成之圖案光罩,接著用波長為365 nm的光以曝光量為30至80 mJ/cm2
之形式輻照所述圖案光罩。接著在23℃下用0.04 wt%的氫氧化鉀水溶液進行顯影2分鐘,接著用純水洗滌1分鐘,藉此形成圖案。在烘爐中在230℃下使具有因此形成的圖案之間隔區固化(或後烘焙)達30分鐘,以獲得具有最終圖案之BCS。測試實例 1 :量測顯影容限
以與上文所描述之方式相同的方式製備厚度為3.5 µm且具有厚度為2 µm的遮光薄膜之BCS。使因此製備之BCS顯影,顯影時間為10至20秒,且觀測遮光薄膜之厚度改變(或偏離)以量測顯影容限。當量測值為1,000 Å/秒或小於1,000 Å/秒時,評估遮光薄膜之顯影容限係極佳的。測試實例 2 : 量測彈性
以與如上文所描述之方式相同的方式製備厚度為3.5 µm且圖案寬度為35 µm之遮光間隔區。使用FISCHERSCOPE(HM2000,德國)藉由負荷/卸荷方法來量測遮光間隔區之彈性恢復率,其中用柱塞(50 µm之平面柱塞)將500 mN的力施加在遮光間隔區上。測試實例 3 : 量測電壓保持率 ( VHR )
在基板(其上已沈積有銦氧化錫合金(ITO)電極)上以與如上文所描述之方式相同的方式塗佈著色感光性樹脂組合物,其中樹脂組合物形成形狀與供製造電池之電極的形狀相同的厚度為3.5 µm的圖案。藉由使用用於量測電壓保持率之裝置(Toyo-6254,東洋)在60℃下施加1 V/60 Hz的頻率而量測電池之電壓保持率。測試實例 4 : 量測抗滲出 性
以與如上文所描述之方式相同的方式製備厚度為3.5 µm、寬度為5 cm且長度為5 cm之基板。將因此製備之基板浸沒在3 g的100%N-甲基吡咯啶酮(NMP)溶液中,接著在節溫器槽中在100℃下對所述基板加熱30分鐘。一旦去除基板,NMP溶液即經受液相層析(HPLC)以判定NMP中的雜質之含量以作為抗滲出性。當雜質總量為30%或小於30%時,評估抗滲出性係極佳的。測試實例 5 : 量測敏感度
當曝露量在預烘焙後即分裂成以與如上文所描述之方式相同的方式製備的經塗佈薄膜時,量測在獲得BCS的遮光層圖案時之曝露量,且在以下表4中展示結果。當形成遮光層所需要的曝露量較小時,評估敏感度(mJ/cm2
)係較快的。測試實例 6 : 量測光密度
以與如上文所描述之方式相同的方式製備厚度為3.5 µm之BCS。使用光密度計量(由Xlite製造之361T)來在550 nm下量測因此製備之BCS的透射率,且判定以1 µm的厚度計的光密度。測試實例 7 : 評估是否形成階差
用光學顯微鏡(STM6,奧林巴斯)在厚度方向上觀測測試實例1之BCS,以查看黑色矩陣與間隔區是否在視覺上被區分。結果在圖2及3中作為照片展示。 [表4]
如圖2及3以及表5中所展示,由實例之組合物製備之固化薄膜(例如,遮光間隔區或黑色柱狀間隔區)(屬於本發明之範疇)在敏感度、彈性恢復率、抗滲出性、電壓保持率、顯影容限及光密度方面整體極佳。此外,清楚地觀測到階差。
與此對比,由根據比較實例的組合物製備之固化薄膜(不屬於本發明之範疇)在大多數屬性方面展示不利結果。此外,未清楚地觀測到階差或階差不可量測。
A‧‧‧柱狀間隔區部分之厚度
B‧‧‧黑色矩陣部分之厚度
C‧‧‧柱狀間隔區部分之臨界尺寸(CD)
圖1為遮光間隔區(或黑色柱狀間隔區)之橫截面之實施例的示意圖。 圖2及圖3為在厚度方向上截取以用於評估由實例之組合物及比較實例之組合物製備之遮光間隔區的階差存在或不存在的遮光間隔區之照片。
Claims (10)
- 一種著色感光性樹脂組合物,包括: (A)共聚物; (B)環氧樹脂或由其衍生之化合物; (C)光可聚合化合物; (D)光聚合引發劑;及 (E)著色劑, 其中所述光聚合引發劑(D)包括具有以下化學式1之肟酯芴基引發劑: [化學式1]其中,在以上化學式1中,R1 各自獨立地為C1-20 烷基, R2 及R3 各自獨立地為C1-20 烷基、C6-20 芳基或C3-20 環烷基, A為硝基或氰基,且 X為單鍵或羰基。
- 如申請專利範圍第1項所述的著色感光性樹脂組合物,其中R1 各自獨立地為甲基、乙基、正丙基、異丙基、正丁基、異丁基、第三丁基、正戊基、異戊基、正己基或異己基, R2 及R3 各自獨立地為甲基、乙基、正丙基、異丙基、正丁基、異丁基、第三丁基、正戊基、異戊基、正己基、異己基、苯基、萘基、聯苯基、三聯苯基、蒽基、茚基或菲基。
- 如申請專利範圍第1項所述的著色感光性樹脂組合物,其中所述環氧樹脂或由其衍生之所述化合物(B)具有卡哆主鏈結構。
- 如申請專利範圍第1項所述的著色感光性樹脂組合物,其包括以所述著色感光性樹脂組合物之固體含量之總重量計呈0.1至5 wt%的量之所述光聚合引發劑(D)。
- 如申請專利範圍第1項所述的著色感光性樹脂組合物,其中所述著色劑係選自由黑色無機著色劑、黑色有機著色劑及藍色著色劑組成之組的至少一種著色劑。
- 如申請專利範圍第1項所述的著色感光性樹脂組合物,其中所述著色劑包括以所述著色感光性樹脂組合物之固體含量之總重量計呈0至20 wt%的量之所述黑色無機著色劑、呈10至40 wt%的量之所述黑色有機著色劑及呈0至15 wt%的量之所述藍色著色劑。
- 一種遮光間隔區,其由如申請專利範圍第1項至第6項中任一項所述的著色感光性樹脂組合物製成。
- 如申請專利範圍第7項所述的遮光間隔區,其電壓保持率為85%或大於85%。
- 如申請專利範圍第7項所述的遮光間隔區,其光密度為0.5至1.5/µm。
- 如申請專利範圍第7項所述的遮光間隔區,其彈性恢復率為90%或大於90%。
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