Patent ID: 9257574
Filing Date: 2016-02-09
CPC Classification: H01L

Claim Text:
1. A diode comprising: a first semiconductor layer is a compound semiconductor layer having a crystalline structure and containing impurities of a first conductivity type; a high dislocation density region which extends in the first semiconductor layer in the film thickness direction; a second semiconductor layer which (a) has a crystalline structure continuous with that of the first semiconductor layer, (b) is laminated on a first side of the first semiconductor layer, (c) has a region at a side adjacent the first semiconductor layer with an impurity concentration lower that of the first semiconductor layer, and (d) has an opening which overlies the high dislocation density region and which extends to the first semiconductor layer; an insulating film pattern covering at least an inner wall of the opening; an electrode overlapping the opening and covering the insulating film pattern and in contact with the second semiconductor layer; and an opposing electrode adjacent a second side of the first semiconductor layer and in contact with the first semiconductor layer including the high dislocation density region.