WIRED BOARD WITH EMBEDDED ELECTRONIC ELEMENT

PROBLEM TO BE SOLVED: To obtain a wiring board with an embedded electronic element, which is superior in connection reliability between embedded electronic elements and wiring circuit layers provided on a wiring board, in the wiring board which keeps the electronic element such as a capacitor embedded in an insulating substrate. SOLUTION: The insulating substrate is configured by a layered structure comprising a first insulating layer 1a made up of a composite of thermosetting resin and inorganic filler and a second insulating layer 1b impregnated with a thermosetting resin in a fiber body; an electronic element 3 is arranged in a cavity provided in the first insulating layer 1a; and electrodes of the electronic element 3 are provided on the upper surface of the electric element 3 and connected to a via hole conductor located on the electrodes. COPYRIGHT: (C)2008,JPO&INPIT