Patent ID: 9281439
Filing Date: 2016-03-08
CPC Classification: H01L

Claim Text:
1. A nitride semiconductor element comprising: a base structure part; an element structure part having at least an n-type AlGaN based semiconductor layer and a p-type AlGaN based semiconductor layer formed on the base structure part; an n-electrode contact part formed on the n-type AlGaN based semiconductor layer; an n-electrode pad part formed on the n-electrode contact part; and a p-electrode formed directly on the p-type AlGaN based semiconductor layer, wherein an AlN mole fraction of the n-type AlGaN based semiconductor layer is 20% or more, the n-electrode contact part comprises one or more metal layers, and a laminated structure of the p-electrode and a laminated structure of the n-electrode pad part are totally the same laminated structure, and the laminated structure is a common laminated structure of two or more layers having an Au layer as an uppermost layer, and an Au diffusion preventing layer made of conductive metal oxide and formed under the uppermost layer to prevent Au diffusion.