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公开(公告)号：US12104056B2
公开(公告)日：2024-10-01
申请号：US17233619
申请日：2021-04-19
发明人： Sun Kug Kim , Hye Ri Kim , Jin Su Park , Hyun Joo Song , Seung Min Jeon
IPC分类号： C08L79/08 , C08G73/10 , C08G73/14 , C08J5/18 , C08J7/04 , C08J7/046 , G02B1/04 , G02B1/11 , G02B1/14 , G02B1/16 , G06F3/041 , G09F9/30
CPC分类号： C08L79/08 , C08G73/1039 , C08G73/1078 , C08J7/046 , C08L2203/16
摘要： The present invention relates to a polyimide-based film which does not substantially cause a mura or rainbow phenomenon and has excellent visibility, a window cover film including the same, and a display panel including the same.
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公开(公告)号：US20240258252A1
公开(公告)日：2024-08-01
申请号：US18430074
申请日：2024-02-01
发明人： Ching-Yu CHANG , Ming-Da CHENG , Ming-Hui WENG
CPC分类号： H01L24/05 , C08G73/1078 , C08G73/1085 , H01L24/03 , H01L24/11 , H01L24/13 , H01L2224/02251 , H01L2224/0226 , H01L2224/0345 , H01L2224/03452 , H01L2224/03462 , H01L2224/03616 , H01L2224/0401 , H01L2224/05111 , H01L2224/05124 , H01L2224/05139 , H01L2224/05144 , H01L2224/05147 , H01L2224/05155 , H01L2224/05166 , H01L2224/05176 , H01L2224/05181 , H01L2224/05184 , H01L2224/1145 , H01L2224/11452 , H01L2224/11462 , H01L2224/11849 , H01L2224/13026 , H01L2224/13082 , H01L2224/13111 , H01L2224/13116 , H01L2224/13118 , H01L2224/1312 , H01L2224/13123 , H01L2224/13124 , H01L2224/13139 , H01L2224/13144 , H01L2224/13147 , H01L2224/13149 , H01L2224/13155 , H01L2224/1316 , H01L2224/13166 , H01L2224/13171 , H01L2224/13179 , H01L2224/1318 , H01L2224/13181 , H01L2224/13184 , H01L2924/014 , H01L2924/04941 , H01L2924/04953 , H01L2924/07025
摘要： A method of manufacturing a bump structure includes forming a passivation layer over a substrate. A metal pad structure is formed over the substrate, wherein the passivation layer surrounds the metal pad structure. A polyimide layer including a polyimide is formed over the passivation layer and the metal pad structure. A metal bump is formed over the metal pad structure and the polyimide layer. The polyimide is a reaction product of a dianhydride and a diamine, wherein at least one of the dianhydride and the diamine comprises one selected from the group consisting of a cycloalkane, a fused ring, a bicycloalkane, a tricycloalkane, a bicycloalkene, a tricycloalkene, a spiroalkane, and a heterocyclic ring.
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公开(公告)号：US20240158578A1
公开(公告)日：2024-05-16
申请号：US18546390
申请日：2022-02-17
申请人： UBE Corporation
发明人： Takuya OKA , Yuki NEMOTO , Yukinori KOHAMA , Taichi ITO
IPC分类号： C08G73/10 , C08J5/18 , C08K5/3447 , C08L79/08
CPC分类号： C08G73/1078 , C08G73/1032 , C08G73/105 , C08J5/18 , C08K5/3447 , C08L79/08 , C08J2479/08 , C08L2201/10 , C08L2203/16 , C08L2203/20
摘要： A precursor composition which can produce a polyimide film with excellent light transmittance, mechanical properties, coefficient of linear thermal expansion and resistance to thermal decomposition; and a polyimide film obtained from the precursor composition. The polyimide precursor composition contains a polyimide precursor with a repeating unit represented by formula (I); an imidazole compound in an amount more than 0.01 mol and 2 mol or less based on one mol of the repeating units of the polyimide precursor, and a solvent.
In general formula I, 70 mol. % or more of X1 is a structure represented by formula (1-1):
and 70 mol % or more of Y1 is a structure represented by formula (D-1) and/or (D-2):-
公开(公告)号：US11966120B2
公开(公告)日：2024-04-23
申请号：US17765961
申请日：2020-09-29
IPC分类号： G02F1/1337 , C08G73/10 , C09K19/56 , C09K19/60 , G02F1/137
CPC分类号： G02F1/133723 , C08G73/1032 , C08G73/1042 , C08G73/105 , C08G73/1078 , C09K19/56 , C09K19/60 , G02F1/133742 , G02F1/13712 , G02F2202/04
摘要： A liquid crystal light control element that controls a light absorption state by voltage application, the liquid crystal light control element including: a liquid crystal layer containing a liquid crystal composition between a pair of substrates each having an electrode; and a liquid crystal alignment film that is provided on at least one of the substrates and aligns a liquid crystal vertically,
wherein the liquid crystal composition contains a liquid crystal and a dichroic dye,
the liquid crystal alignment film is obtained from a liquid crystal aligning agent containing a polyimide precursor in which a diamine having a specific side chain is used as a part of the raw material or a polyimide obtained by imidizing the polyimide precursor, and
the proportion of the diamine used is 50 to 100 mol % based on the entire diamine component.-
公开(公告)号：US20240043619A1
公开(公告)日：2024-02-08
申请号：US18377194
申请日：2023-10-05
发明人： Takayuki KANADA , Masaki MAITANI , Toshiaki OKUDA
IPC分类号： C08G73/10 , C08J5/18 , B29C41/46 , B29C41/00 , C09D179/08
CPC分类号： C08G73/106 , C08G73/1082 , C08G73/1078 , C08G73/1032 , C08J5/18 , B29C41/46 , B29C41/003 , C09D179/08 , B29L2031/3475
摘要： Problem: The invention provides a polyimide precursor as well as a resin composition thereof that is excellent in coating properties of slit coating as well as productivity and also excellent in optical properties that are required for applications of flexible substrates.
Solution: The polyimide precursor comprises a structure unit derived from a fluorene backbone and a silicon-containing structure unit, and a weight-average molecular weight of the polyimide precursor is 90,000 to 250,000.-
公开(公告)号：US11807794B2
公开(公告)日：2023-11-07
申请号：US17772567
申请日：2021-10-22
发明人： Shenglin Wang , Houming Li , Jianghua Su
IPC分类号： G02F1/1337 , G02F1/1339 , C09K19/56 , C08G73/10 , C08J5/18
CPC分类号： C09K19/56 , C08G73/1032 , C08G73/1042 , C08G73/1078 , C08J5/18 , G02F1/133711 , G02F1/133784 , C08J2379/08 , G02F1/1339 , G02F1/13392 , G02F2202/28
摘要： A liquid crystal alignment agent and a preparation method thereof, a liquid crystal alignment film and a preparation method thereof, and a liquid crystal cell are provided. A piperazine monomer is added to a liquid crystal alignment agent, a bulk resistance value and a surface resistance value of a liquid crystal alignment agent material can be reduced, and the ability of the liquid crystal alignment agent material to release residual charges can be effectively improved, thereby increasing the reliability and stability of an electronic product. The liquid crystal cell using the liquid crystal alignment agent has advantages such as high voltage holding ratio (VHR) and low residual voltage.
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7.发明授权公开(公告)号：US11697710B2
公开(公告)日：2023-07-11
申请号：US16533911
申请日：2019-08-07
发明人： YanYan Jiang , ZhenZhong Wang , Xi Ren , Wei Zhang
CPC分类号： C08G73/1067 , B29C41/003 , B29C41/46 , C08G73/1021 , C08G73/1032 , C08G73/1078 , C08J5/18 , B29K2079/08 , B29K2995/0026 , B29L2007/008 , C08J2379/08 , H10K77/111
摘要： A polyimide film contains fluorinated substituents and cardo structures. The polyimide film exhibits excellent heat-resistance, transparency and mechanical properties. The polyimide film has a glass-transition temperature (Tg) of at least 360° C., a coefficient of thermal expansion (CTE) of 50 ppm/° C. or lower, a modulus of at least 4.0 Gpa, a b* value of 5 or lower and yellowness index of 8 or less. The polyimide film can be used as a display substrate or an optical film in a liquid crystal display (LCD), an organic light-emitting diode (OLED) and in other fields where the characteristic features are required.
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公开(公告)号：US20230173800A1
公开(公告)日：2023-06-08
申请号：US17995239
申请日：2021-05-25
申请人： TOYOBO CO., LTD.
发明人： Tetsuo OKUYAMA , Makoto NAKAMURA , Denichirou MIZUGUCHI , Harumi YONEMUSHI , Hiroyuki WAKUI , Kaya TOKUDA
CPC分类号： B32B27/281 , B32B27/08 , C08G73/1032 , C08G73/1064 , C08G73/1071 , C08G73/1042 , C08G73/1078 , C08G73/1039 , C08G73/1053 , C08L79/08 , C08J7/0427 , B32B2307/30 , B32B2307/412 , B32B2307/732 , B32B2307/54 , B32B2307/306 , B32B2307/748 , C08L2203/16 , C08J2379/08 , C08J2479/08
摘要： The present invention provides a multilayer body of an inorganic substrate and a highly heat-resistant transparent film which has sufficient heat resistance and is able to be mechanically separated from the inorganic substrate after being subjected to various processes on the inorganic substrate since the adhesion between the highly heat-resistant transparent film and the inorganic substance is adequately weak. A multilayer body of a highly heat-resistant transparent film and an inorganic substrate, wherein: an adhesive is not substantially used; the peel strength between the highly heat-resistant transparent film and the inorganic substrate is 0.3 N/cm or less; and the CTE of the highly heat-resistant transparent film is 50 ppm/K or less.
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公开(公告)号：US20230167365A1
公开(公告)日：2023-06-01
申请号：US17772567
申请日：2021-10-22
发明人： Shenglin WANG , Houming LI , Jianghua SU
IPC分类号： C09K19/56 , C08G73/10 , C08J5/18 , G02F1/1337
CPC分类号： C09K19/56 , C08G73/1032 , C08G73/1042 , C08G73/1078 , C08J5/18 , G02F1/133711 , G02F1/133784 , C08J2379/08 , G02F1/1339 , G02F2202/28
摘要： A liquid crystal alignment agent and a preparation method thereof, a liquid crystal alignment film and a preparation method thereof, and a liquid crystal cell are provided. A piperazine monomer is added to a liquid crystal alignment agent, a bulk resistance value and a surface resistance value of a liquid crystal alignment agent material can be reduced, and the ability of the liquid crystal alignment agent material to release residual charges can be effectively improved, thereby increasing the reliability and stability of an electronic product. The liquid crystal cell using the liquid crystal alignment agent has advantages such as high voltage holding ratio (VHR) and low residual voltage.
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10.发明申请公开(公告)号：US20180267367A1
公开(公告)日：2018-09-20
申请号：US15758380
申请日：2016-09-13
发明人： Kanako SUZUKI , Yuta KAWANO , Kohei GOTO , Masaaki KATAYAMA
IPC分类号： G02F1/1337 , C09K19/56 , C08G73/10 , C08G73/12
CPC分类号： G02F1/133723 , C08G73/10 , C08G73/1078 , C08G73/127 , C09K19/14 , C09K19/20 , C09K19/56 , C09K19/586 , C09K19/588 , C09K2019/0444 , C09K2019/548 , G02F1/133719 , G02F1/133788
摘要： The present invention provides the following: a photo alignment method-use liquid crystal aligning agent used to obtain a photo alignment method-use liquid crystal alignment film that does not cause bright spots even when negative liquid crystals are used, and that is capable of achieving good after-image characteristics; a liquid crystal alignment film obtained from the liquid crystal aligning agent; and a liquid crystal display element provided with the liquid crystal aligning agent. Provided is the liquid crystal aligning agent which contains a polyimide or polyimide precursor obtained from a reaction between: a tetracarboxylic acid dianhydride represented by formula (1) (in the formula, X1 is as set forth in the present specification) or a derivative thereof; and a diamine component that contains a diamine represented by formula (2) (in the formula, R1, Z1 and n are as set forth in the present specification).
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