Patent ID: 9165919
Filing Date: 2015-10-20
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a first conductivity type semiconductor substrate; a first region of a second conductivity type semiconductor layer formed on a surface of the semiconductor substrate; a circuit element including a p-n junction formed from the semiconductor substrate and the first region; an input terminal connected to the first region; and a protective element for protecting the circuit element from ESD applied to the input terminal, the protective element including a transistor formed by using the first region as a collector, the semiconductor substrate as a base, and a second region of the second conductivity type semiconductor layer formed in the semiconductor substrate as an emitter, the protective element being formed by connecting the emitter to the semiconductor substrate through a connection region provided in the semiconductor substrate by an electric conductor, wherein the first region is divided into a plurality of regions, a plurality of the circuit elements using each of the plurality of the first regions are formed, and the second region of the protective element is formed in one piece among the plurality of the first regions.