| abstract |
Conventionally, since a resin insulating layer with via holes is laminated on an IC chip fixed in a through hole in a ceramic core substrate with a filler like a wiring substrate disclosed in patent document 1, the self-alignment function on an IC chip cannot be used when the IC chip is mounted. Therefore, the via holes (electrodes) in the resin insulating layer is hard to arrange with respect to the terminals of the IC chip and electrical connection between the IC chip and the electrodes of the resin insulating layer is difficult. A composite multilayer substrate (10) of the invention has a laminate structure of a resin part (11) and a ceramic multilayer substrate (12). In the laminate structure, a cavity (10A) is provided. The resin part (11) has a protruding portion (11B), and the ceramic multilayer substrate (12) has a through hole (12B). The cavity (10A) is formed by fitting the protruding portion (11B) of the resin layer (11) into the end portion of the through hole (12B) of the ceramic multilayer substrate (12). |