| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyamic acid derivative that can give a cured polyimide resin coating having an extremely low residual stress and high glass transition temperature simultaneously. SOLUTION: This polyamic acid derivative comprises units 1 and units 2 represented by general formula (1), and has a number average molecular weight of 3,000-100,000. The polyimide resin after thermal curing has glass transition temperatures in the ranges of -150 to 0°C and 150 to 380°C, respectively. COPYRIGHT: (C)2005,JPO&NCIPI
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