| 摘要 |
PROBLEM TO BE SOLVED: To propagate electric signals also forming wiring in high density by forming an insulating board of glass fiber reinforced polyphenylene ether resin board. SOLUTION: An insulating board 1 is made of a glass fiber reinforced polyphenylene ether resin board. That is, the board 1 is formed by impregnating cloth interwoven with a glass fiber with the pecursor of polyphenylene to be thermoset at the temperature of 150 deg.C-200 deg.C. This insulating board 1 is reinforced with the glass fiber. Accordingly, the board 1 gaining excellent mechanical strength can satisfactorily endure any external force or when a multilayer wiring 4 made of an organic resin insulating layer 2 and a thin film wiring conductor 3 is coat.formed on the surface of the board 1. |
