Patent ID: 9456504
Filing Date: 2016-09-27
CPC Classification: H01L,H05K

Claim Text:
1. An electronic device comprising: a plurality of wiring substrates stacked upon one another with a connection member arranged between adjacent ones of the wiring substrates, wherein the connection member electrically connects the adjacent ones of the wiring substrates, and each of the wiring substrates includes a solder resist layer as a lowermost layer; a plurality of electronic components mounted on the wiring substrates so that at least one of the electronic components is mounted on each of the wiring substrates; a first magnetic thin film that covers a lower surface of the solder resist layer of an upper one of the adjacent ones of the wiring substrates; a first encapsulation resin formed on an upper surface of the uppermost one of the wiring substrates, wherein the first encapsulation resin encapsulates the electronic component mounted on the uppermost one of the wiring substrates; and a second magnetic thin film that entirely covers an upper surface of the first encapsulation resin and covers a lower surface of the solder resist layer on the lowermost one of the wiring substrates, wherein: the solder resist layer of the upper wiring substrate includes an opening that extends through the solder resist layer at a location corresponding to the connection member; the first magnetic thin film includes an opening that extends through the first magnetic thin film at a location corresponding to the connection member and the opening of the solder resist layer; the upper wiring substrate includes a connection pad that is located in the opening of the solder resist layer, has a surface-processed layer, and is connected to the connection member; the connection pad is exposed to the outside through the opening of the solder resist layer and the opening of the first magnetic thin film; and the first magnetic thin film entirely covers the solder resist layer of the upper wiring substrate.