| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated plate which has elevated visible light (400-700nm) reflectivity and is suitable for a printed circuit board on which a light emitting diode is mounted. SOLUTION: A glass fiber backing layer sheet impregnated with a thermosetting resin (phenol-novolac resin, epoxy resin curing agent) is heat-press-molded to make a laminate. By incorporating titanium dioxide having light masking power into the thermosetting resin, the transmission factor of light 400-700nm in wavelength per 0.2mm plate thickness is made 15% or less. Practically, the content of titanium dioxide is made at least 30 pts.wt. for 100 pts.wt. of the thermosetting resin. |
