Patent ID: 9667242
Date: 2017-05-30
CPC Classifications: H01L,H03K

Claim:
1. A semiconductor device, comprising: a semiconductor substrate of a first conductivity type having a first region of a second conductivity type formed in a surface thereof; an insulating film on the semiconductor substrate; a primary wiring line connected to the first region and configured to receive a voltage from outside; a plurality of diodes connected in series on the insulating film, said series of diodes having a spiral shape generally centering around the first region in a plan view, said plurality of diodes having one end of the series thereof connected to the primary wiring line and serving as a cathode; a resistor voltage divider including at least two resistors connected in series, the resistor voltage divider having one end connected to another end of the series of the diodes such that the plurality of diodes and the resistor voltage divider are connected in series; a first connection wiring line connected to another end of the resistor voltage divider; and a second connection wiring line connected to a midpoint between said another end of the series of diodes and said another end of the resistor voltage divider.