Patent ID: 9252262
Filing Date: 2016-02-02
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a semiconductor chip having a cell region; and a peripheral region formed outside the cell region, the semiconductor chip comprising: (a) a semiconductor substrate; (b) an epitaxial layer of a first conductivity type formed over the semiconductor substrate; (c) a plurality of second conductivity type column regions of a second conductivity type which is an opposite conductivity type to the first conductivity type, formed apart from one another in the epitaxial layer; (d) a plurality of first conductivity type column regions which are partial regions of the epitaxial layer, each interposed between the mutually adjacent second conductivity type column regions; and (e) an element part formed, at a surface of the epitaxial layer, wherein a lower band gap region having a smaller band gap than a band gap of the epitaxial layer is formed in the cell region.