THERMOSETTING RESIN COMPOSITION, PREPREG, LAMINATED SHEET, AND PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a thermosetting resin composition that has a black appearance and is suitable for producing a laminated sheet which has no reduction in insulation properties and reliability when made into a printed wiring board, and to provide a prepreg etc. SOLUTION: The thermosetting resin composition comprises black dye such as chromic acid (1-), [1-[(2-hydroxy-4-nitrophenyl)azo]-2-naphthalenolato (2-)][1-[(2-hydroxy-5-nitrophenyl)azo]-2-naphthalenolato (2-)], wherein the total inorganic ion concentration in the black dye is ≤200 ppm. COPYRIGHT: (C)2011,JPO&INPIT