Patent ID: 7879656

Claim:
A method of manufacturing a multilayer substrate, comprising steps of: preparing a plurality of resin films made of a thermoplastic resin, wherein at least one resin film has a through hole for inserting an electric element and other resin film has no through hole, and the one resin film further includes a plurality of protruding members, each of which protrudes from a surrounding portion of the through hole towards the through hole, and wherein one protruding member opposes to another one protruding member so that a distance between top ends of the one and the another one is shorter than an outside dimension of the electric element; stacking the resin films and a spacer, wherein the spacer is arranged between the one resin film and an adjacent resin film and disposed at a base portion of one of the protruding members; press-inserting the electric element in the through hole by crushing the top ends of the protruding members with the electric element; and heating and pressing the stacked resin films so that an insulating base member is formed from the stacked resin films and the electric element is embedded in the insulating base member.