Patent ID: 7041541

Claim:
Method for producing a semiconductor component, in which a recess ditch is produced through an opening of a protective layer, in an underlying semiconductor region, and a narrow electrode foot and, above it, a broader electrode head of a metallic electrode are produced through the opening of the protective layer, wherein the electrode metal for the electrode foot and the electrode head is deposited continuously onto the protective layer, over its entire area, and in its opening, wherein the structure of the electrode head is etched in the metal layer, up to the protective layer, wherein afterwards the protective layer is removed, and at least the semiconductor surface of the recess ditch is covered with a passivation layer, and wherein the passivation is allowed to grow so long, i.e. so thick that the space surrounded on several sides by the semiconductor region, the electrode foot, and the electrode head, and facing towards a side facing away from the electrode foot, which was originally open, is closed off by the material and has a cavity not filled by passivation material.