Patent ID: 9224684
Filing Date: 2015-12-29
Classification: H01L,H05K

Abstract:
1. A wiring board comprising: a first insulating layer; a secondary battery on a first surface of the first insulating layer; a second insulating layer disposed on the first surface of the first insulating layer so as to cover the secondary battery, the second insulating layer comprising a second insulating layer lower surface in contact with the first surface of the first insulating layer, and a second insulating layer upper surface that is opposite from the second insulating layer lower surface; a third insulating layer disposed on and covering the second insulating layer upper surface, the third insulating layer comprising a third insulating layer lower surface in contact with the second insulating layer upper surface, and a third insulating layer upper surface that is opposite from the third insulating layer lower surface; a first wiring layer disposed on the third insulating layer upper surface; and a via electrically connecting the first wiring layer to an electrode of the secondary battery, the via passing through the second insulating layer and the third insulating layer, wherein a rigidity and a tensile strength of the second insulating layer is lower than those of the first and third insulating layers.