SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a high-withstand-voltage diode.SOLUTION: A semiconductor device includes: a semiconductor substrate; a first diffusion region of a first conductivity type formed in the semiconductor substrate; a second diffusion region of a second conductivity type being the opposite conductivity type to the first conductivity type, formed in the first diffusion region; a third diffusion region of the first conductivity type formed in the second diffusion region; a first wiring pattern formed on the semiconductor substrate, receiving a first voltage, and connected to the second diffusion region; and a second wiring pattern formed on the semiconductor substrate and receiving a second voltage higher than the first voltage. The second and third diffusion regions form a diode by pn junction, and a conductive pattern that intersects with the second wiring pattern in a plan view and receives the first voltage is provided between the second diffusion region and the second wiring pattern.