Abstract: A conical corrugated microwave feed horn. A conical flare section is formed at the aperture of the feed horn and a second smooth cylindrical section is formed at the throat of the feed horn. The conical flare section is formed with two regions. The first region is a corrugated conical region formed at the aperture and having a plurality of slots formed parallel to the central axis of the feed horn. Each slot in the plurality of slots has an inner surface closest to the central axis of the feed horn and an outer surface furthest from the central axis. Connecting the corrugated conical region to the cylindrical throat is a smooth conical region. The first slot adjacent the smooth conical region has first and second formed lips on the terminating end thereof. The lips are formed directed inwardly toward each other. The last slot of the plurality of slots at the aperture of the feed horn has the terminating end of the inner surface extending in length beyond the length of the outer surface.

Abstract: A planar semiconductor device having a cathode region surrounding an anode region is flip chip mounted to a conductor film circuit. An anode contact extends from the anode region and is bonded to a first portion of the conductor film circuit such that that portion of the cathode region which overlaps the first portion of the conductor film circuit is minimized. That portion of the cathode region distal from the anode region is relatively wide, and a relatively large area cathode contact extends from the cathode region and is bonded to a second portion of the conductor film circuit.

Abstract: A contact on a surface of a semiconductor device includes a post projecting from the surface of the device and a head on the post. The post has a transverse cross-sectional shape of at least three arms projecting radially from a common center point. The head has a cross-sectional area larger than the transverse cross-sectional area of the post. The post is on the surface of a body of semiconductor material and extends through a layer of an inorganic insulating material, such as an oxide or nitride, on the surface of the body. The post is of a height such that the head is spaced from the inorganic insulating material layer. A layer of an organic insulating material, such as a polyimide or silicone resin, may be provided on the inorganic insulating material layer and around the post to provide additional support for the head.