Patent ID: 8592878

Claim:
A semiconductor device with a Schottky contact, the semiconductor device comprising: a semiconductor having a semiconductor surface and a mesa in the semiconductor, wherein the mesa is defined by an upper portion of the semiconductor that is thicker than a lower portion of the semiconductor; a passivation layer covering the mesa, the passivation layer having a passivation layer top surface and an opening over the mesa that has a first width, wherein the opening defines passivation layer sidewalls adjacent to the semiconductor surface; the Schottky contact disposed in the opening on the semiconductor surface, the Schottky contact having a contact top surface and contact sidewalls along an extent from the semiconductor surface to the contact top surface, wherein the contact sidewalls are in direct contact with the passivation layer sidewalls, and a width of the Schottky contact equals the first width; a further conductor on the contact top surface of the Schottky contact and extending over portions of the passivation layer top surface on either side of the Schottky contact, the further conductor having a second width greater than the first width; and spaced-apart Ohmic source and drain contacts on the mesa, which are separated from the Schottky contact, wherein the passivation layer to surface is at a first height above the semiconductor surface, and the Schottky contact has a second height above the semiconductor surface that is less than the first height, and wherein the Schottky contact directly contacts the upper portion of the semiconductor.