| 摘要 |
PROBLEM TO BE SOLVED: To provide a halogen-free wiring substrate having a low percentage of water absorption and a low dielectric dissipation factor, suitable for high-frequency use and having good flame retardance. SOLUTION: The insulating resin sheet is obtained by impregnating a fiber substrate 1 with a thermosetting resin composition 2 prepared by adding and mixing 100 pts. mass of a modified polyphenylene ether resin with 1-10 pts. mass of a cross-linking agent, 10-40 pts. mass of an elastomer for imparting flexibility, 10-50 pts. mass of a flame retardant composed of a phosphazene compound and 30-100 pts. mass of an inorganic insulating filler composed of a metal hydroxide. COPYRIGHT: (C)2005,JPO&NCIPI |
