Patent ID: 8674514
Filing Date: 2014-03-18
Classification: B81C,H01L,H05K

Abstract:
1. A wiring board, comprising: a ceramic substrate including a plurality of stacked ceramic layers, an internal wiring, and an electrode, the internal wiring being electrically connected to the electrode, the electrode being exposed from a first surface of the ceramic substrate; and a silicon substrate including a wiring layer, the wiring layer including a wiring pattern and a via-fill, the wiring pattern being formed on a main surface of the silicon substrate, an end of the via-fill being electrically connected to the wiring pattern, another end of the via-fill being exposed from a rear surface of the silicon substrate positioned opposite to the main surface, wherein the rear surface of the silicon substrate is anodically bonded to the first surface of the ceramic substrate; the via-fill of the silicon substrate is directly connected to the electrode of the ceramic substrate, and a thin film made of silicon dioxide is formed at a border of the rear surface of the silicon substrate and the first surface of the ceramic substrate, said thin film having a thickness necessary for the rear surface of the silicon substrate to be anodically bonded to the first surface of the ceramic substrate.