| abstract |
A low-cost and high-capacitance built-in wiring board is provided. A capacitor-embedded wiring board includes a sheet base material 11 that is located inside the wiring board and at least one surface of which is a metal, and a dielectric layer 12 that is positioned on a metal surface of the sheet base material. A planar capacitor 22 including a capacitor electrode layer 14 located on the dielectric layer, insulated from the capacitor electrode layer, and reaches a metal surface of the sheet base material from the surface of the wiring substrate; A conductor 18, a first electrode pad 21V connected to the first conductor and positioned on the surface of the wiring board, and a second conductor 17 penetrating the sheet base material and insulated from the sheet base material. And a second electrode pad 21G connected to the second conductor and the capacitor electrode layer. [Selection] Figure 1 |