Patent ID: 8705247
Filing Date: 2014-04-22
Classification: H01L,H05K

Abstract:
1. A circuit board comprising: a laminated body including insulation layers that are made of a thermoplastic resin and are stacked on one another in a stacking direction; a plurality of external electrodes provided on a bottom surface of the laminated body; and a hard member that is provided in or on the laminated body and that has a hardness that is greater than that of the insulation layers; wherein the laminated body includes: the rigid region is less flexible than the first flexible region; the rigid region includes portions of the insulation layers made of the thermoplastic resin and portions of the hard member; the flexible region includes portions of the insulation layers made of the thermoplastic resin; when viewed in plan from the stacking direction, a ratio of the hard member that occupies the rigid region to the rigid region is greater than a ratio of the hard member that occupies the first flexible region to the first flexible region; at least some of the plurality of external electrodes are provided within the first flexible region when viewed in plan from the stacking direction; the hard member includes a first film electrode; the rigid region includes the first film electrode when viewed in plan from the stacking direction; the rigid region includes a plurality of via-hole conductors connected to the first film electrode; the rigid region includes an element that is overlapped by the first film electrode when viewed in plan from the stacking direction; and the plurality of via-hole conductors are arranged to surround an outer periphery of the element.