Invention Grant
US09000554B2 Semiconductor device 有权
半导体器件

Semiconductor device
Abstract:
A first isolation trench insulates and separates a low-voltage region, a high-voltage region, and a connection region of the semiconductor layer from each other. A low-potential signal processing circuit is in the low-voltage region, and operates at a lower potential. A high-potential signal processing circuit is in the high-voltage region, and operates at a higher potential. A capacitor is on the connection region and transmits the second alternating current signal from the low-potential signal processing circuit to the high-potential signal processing circuit. The capacitor includes a low-potential electrode connected to the low-potential signal processing circuit, and a high-potential electrode connected to the high-potential signal processing circuit. First wiring layers of the low-potential electrode and second wiring layers of the high-potential electrode are capacitively coupled. Side wall surfaces of the first wiring layers and those of the second wiring layers are opposed to each other.
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