Patent ID: 8793868

Claim:
A method of producing a chip embedded substrate, comprising: a semiconductor chip mounting step, wherein a semiconductor chip is mounted on a first substrate in which a first wiring is formed; a housing step, wherein the first substrate and a second substrate in which a second wiring is formed are housed so as to oppose each other in a mold having an opening so that the semiconductor chip mounted on the first substrate and the second substrate in which a second wiring is formed are opposed with a predetermined space therebetween; and a mold resin forming step, wherein mold resin supplied through the opening is introduced between the first substrate and the second substrate, and the mold resin is hardened so as to encapsulate the semiconductor chip with the mold resin and encapsulate the first substrate and the second substrate, wherein, prior to the housing step, electrical connection between the first wiring and the second wiring is made by an electrical connection member, each of which is made by coating a single solder layer on a surface of a single metal ball, wherein the metal ball has a higher melting point than the solder layer and is a spacer maintaining a predetermined space between the first substrate and the second substrate that are supported.