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公开(公告)号：EP1311586A1
公开(公告)日：2003-05-21
申请号：EP00990316.2
申请日：2000-12-21
CPC分类号： C08G73/10 , C08G73/1039 , C08G73/1053 , H01B3/306 , H05K1/0346 , Y10S428/901 , Y10T428/10 , Y10T428/1023 , Y10T428/31721
摘要： An element of a gigahertz electronic device is provided comprising a polyimide selected to have an imide equivalent weight of 375 or greater. The polyimide preferably has a dielectric loss at 12.8 GHz of 0.009 or less and a Tg of 260°C or greater. Such elemen ts include circuit substrates and antennas.
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公开(公告)号：EP1311587B1
公开(公告)日：2005-11-16
申请号：EP01984529.6
申请日：2001-01-03
发明人： MINAMI, Kazuhiko , AYUKAWA, Hiroshi , SUWA, Toshihiro , KOBAYASHI, Mitsuaki , CHIEN, Bert, T. , EZZELL, Stephen, A.
IPC分类号： C08G73/10
CPC分类号： C08G73/101 , C08G73/10 , Y10S428/901 , Y10T428/10 , Y10T428/1023 , Y10T428/31721
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公开(公告)号：EP1311587A1
公开(公告)日：2003-05-21
申请号：EP01984529.6
申请日：2001-02-03
发明人： MINAMI, Kazuhiko , AYUKAWA, Hiroshi , SUWA, Toshihiro , KOBAYASHI, Mitsuaki , CHIEN, Bert, T. , EZZELL, Stephen, A.
IPC分类号： C08G73/10
CPC分类号： C08G73/101 , C08G73/10 , Y10S428/901 , Y10T428/10 , Y10T428/1023 , Y10T428/31721
摘要： A thermally cured polyimide is provided, and in particular a crosslinked polyimide, comprising a fluorenyl diamine and comprising an aromatic ring having at least one C1-C10 branched or unbranched alkyl substituent, where the alkyl substituent includes a benzylic hydrogen. The present invention provides a crosslinked polyimide made by a process comprising the step of crosslinking a polyimide comprising diamines comprising pendent fluorenyl groups and comprising aromatic rings having at least one C1-C10 branched or unbranched alkyl substituent, the alkyl substituent including a benzylic hydrogen, by raising the temperature of said polyimide above its glass transition temperature.
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