Patent ID: 8237059

Claim:
A method of manufacturing an electronic component-embedded board, comprising: a step of preparing a substrate; a step of mounting an electronic component on the substrate; a step of mounting a member on an electronic component-unmounted portion of the substrate; a step of forming an insulating layer on the substrate so as to cover the electronic component and the member; and a step of forming a wiring layer on at least one of the substrate and the insulating layer, wherein the member satisfies a relation represented by the following formula (I), α1<α3 and α2<α3 (1), in which α 1 is the linear coefficient of thermal expansion of the electronic component (ppm/K), α 2 is the linear coefficient of thermal expansion of the member (ppm/K), and α 3 is the linear coefficient of thermal expansion of the substrate, the wiring layer or the insulating layer (ppm/K), and the member has a spatial volume ratio occupied within the insulating layer that decreases in a direction towards an outer periphery of the substrate.