| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive element build-in wiring board of a novel structure where functional elements, e.g., MEMS or SAW filters, are embedded in a wiring board consisting at least of one pair of wiring layers, and an insulation layer disposed therebetween, in such a state that the function of the functional surface is not degraded.SOLUTION: The element build-in wiring board includes a pair of first wiring layer and a second wiring layer arranged to face each other, an insulation layer disposed between the first wiring layer and second wiring layer, a functional element mounted on the first wiring layer so that a functional surface is exposed to a hollow part formed in the insulation layer, and a pattern layer constituting the sidewall of the hollow part and defining the hollow part. |
