Patent ID: 6849878

Claim:
A radiation-emmiting semiconductor chip, comprising: a thin-film element having a plurality of layers formed from a III-V nitride semiconductor material, said thin-film element having an n-conducting side and a p-conducting side; an electrically conductive carrier, said p-conducting side of said thin-film element applied to said electrically coductive carrier; and a contact surface applied on said n-conducting side of said thin-film element, said thin-film element containing a buffer layer being an epitaxy layer adjoining said contact surface, said epitaxy layer formed of an AlGaN-based material and having a first side adjoining said contact surface with a lower Al content than a second side of said epitaxy layer remote from said contact surface, said buffer layer having a plurality of electrically conductive regions made from a different III-V nitride semiconductor material than a remainder of said buffer layer.