SEMICONDUCTOR DEVICE

摘要

A semiconductor device includes a first-conductivity-type semiconductor substrate, a first first-conductivity-type semiconductor layer, a second first-conductivity-type semiconductor layer, a second-conductivity-type bottom layer, a;Schottky metal, and a cathode electrode. The first first-conductivity-type semiconductor layer is provided on the semiconductor substrate and has a lower first-conductivity-type impurity concentration than the semiconductor substrate. The second first-conductivity-type semiconductor layer is provided on the first first-conductivity-type semiconductor layer and has a higher first-conductivity-type impurity concentration than the first first-conductivity-type semiconductor layer. The Schottky metal is provided on the second first-conductivity-type semiconductor layer. The Schottky metal contacts with partly the first first-conductivity-type semiconductor layer. The second-conductivity-type bottom layer is provided in the first first-conductivity-type semiconductor layer and is connected to the Schottky metal. The cathode electrode is connected to the semiconductor substrate.

主权项

1. A semiconductor device comprising:
a first-conductivity-type semiconductor substrate; a first first-conductivity-type semiconductor layer provided on the semiconductor substrate and having a lower first-conductivity-type impurity concentration than the semiconductor substrate; a second first-conductivity-type semiconductor layer provided on the first first-conductivity-type semiconductor layer and having a higher first-conductivity-type impurity concentration than the first first-conductivity-type semiconductor layer; a Schottky metal provided on the second first-conductivity-type semiconductor layer and contacting with partly the first first-conductivity-type semiconductor layer; a second-conductivity-type bottom layer provided in the first first-conductivity-type semiconductor layer and connected to the Schottky metal; and a cathode electrode connected to the semiconductor substrate.