| 摘要 |
The present invention relates to a resin for optical-semiconductor-element encapsulation containing a polyimide which is produced by imidizing a polyimide precursor obtained by subjecting 5-norbornene-2,3-dicarboxylic anhydride or maleic anhydride, an aliphatic tetracarboxylic dianhydride, and an aliphatic diamine compound to a condensation polymerization reaction. The resin of the invention has excellent heat resistance and excellent light-transmitting properties. In addition, the present invention also relates to an optical semiconductor device containing an optical semiconductor element encapsulated with the resin.
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