Patent ID: 8390106
Filing Date: 2013-03-05
Classification: H01L,H05K

Abstract:
1. A circuit board comprising: an insulating member having a thermoplastic resin portion; a semiconductor chip having a first electrode on its first side and a second electrode on its second side opposite to the first side, the semiconductor chip being encapsulated with the thermoplastic resin portion; and a wiring member located in the insulating member and electrically connected to the first electrode and the second electrode, the wiring member including a conductor pattern with a pad, an interlayer connection member in a via hole, and a connection portion for connecting the pad and the first electrode, wherein a first diffusion layer is located at an interface between the first electrode and the connection portion, a second diffusion layer is located at an interface between the pad and the connection portion, a third diffusion layer is located at an interface between the second electrode and the interlayer connection member, at least one element of the interlayer connection member electrically connected to the second electrode has a melting point lower than a glass-transition point of the thermoplastic resin portion, and the connection portion is made of material having a melting point higher than a melting point of the thermoplastic resin portion.