| 摘要 |
PROBLEM TO BE SOLVED: To provide a cyanate resin composition that is excellent in light shielding properties while maintaining a high glass transition temperature and excellent soldering heat resistance, and a prepreg, a laminated board, a resin sheet, a printed wiring board, and a semiconductor device using the resin composition. SOLUTION: The cyanate resin composition includes a cyanate resin and a fluorescent dye compound represented by formula (1) as indispensable components, wherein R<SP>1</SP>and R<SP>2</SP>are each hydrogen or a substituent selected from the group consisting of hydroxy, ethyl, methyl, butyl, tertiary butyl, phenyl, and carboxy, and R<SP>1</SP>and R<SP>2</SP>may be the same or different from each other. COPYRIGHT: (C)2011,JPO&INPIT
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