Patent ID: 7947994
Filing Date: 2011-05-24
Classification: B82Y,H01L,H01S

Abstract:
1. A nitride semiconductor device comprising; an n-region having an n-side contact layer of nitride semiconductor, a buffer layer of nitride semiconductor and an n-side multi-film layer having at least one first nitride semiconductor film containing In and at least one second nitride semiconductor film having a composition different from that of said at least one first nitride semiconductor film, wherein the buffer layer is located between the n-side contact layer and said n-side multi-film layer; a p-region having a nitride semiconductor film, and an active layer interposed between said n-region and said p-region, wherein the n-side multi-film layer of said n-region is located between said active layer and said buffer layer of said n-side multi-film layer, wherein at least one of said at least one first nitride semiconductor film and said at least one second nitride semiconductor films has the thickness less than 100 angstroms.