Patent ID: 7755168

Claim:
A semiconductor device, comprising: a first conductivity-type first semiconductor region formed to extend in a planar manner; a second conductivity-type second semiconductor region located on or above said first semiconductor region; a second conductivity-type third semiconductor region located on or above said first semiconductor region and formed apart from said second semiconductor region; a second conductivity-type fourth semiconductor region located on or above said first semiconductor region and formed apart from said second semiconductor region and said third semiconductor region between said second semiconductor region and said third semiconductor region; a first conductivity-type fifth semiconductor region located on or above said first semiconductor region, located between said third semiconductor region and said fourth semiconductor region, and having a resistance lower than that of the first semiconductor region; a first electrode formed to be in contact with said second semiconductor region; a second electrode formed to be in contact with said third semiconductor region; and a third electrode formed in a region sandwiched by said second semiconductor region and said fourth semiconductor region, wherein said fourth semiconductor region and said fifth semiconductor region are electrically connected by a conductive member, and a distance between said fourth semiconductor region and said third semiconductor region is larger than a width of said fourth semiconductor region.