Abstract: A semiconductor component includes: a semiconductor substrate (110); an epitaxial semiconductor layer (120) above the semiconductor substrate; a bipolar transistor (770, 870) in the epitaxial semiconductor layer; and a field effect transistor (780, 880) in the epitaxial semiconductor layer. A portion of the epitaxial semiconductor layer forms a base of the bipolar transistor and a gate of the field effect transistor, and the portion of the epitaxial semiconductor layer has a substantially uniform doping concentration. In the same or another embodiment, a different portion of the epitaxial semiconductor layer forms an emitter of the bipolar transistor and a channel of the field effect transistor, and the different portion of the epitaxial semiconductor layer has a substantially uniform doping concentration that can be the same as or different from the substantially uniform doping concentration of the portion of the epitaxial semiconductor layer.

Abstract: An evaporative cooling apparatus is provided that may be quickly deployed to cool an area. The apparatus is preferably self-contained or substantially self-contained. The apparatus can be either a dedicated trailer with a conventional draft vehicle or a vehicle itself or a permanently dedicated apparatus. The apparatus creates an evaporatively cooled volume of air with fine entrained water droplets suspended therein. The apparatus transfers the cooling suspension to an area to be cooled proximate the apparatus.

Abstract: An implant-free enhancement mode metal-oxide semiconductor field effect transistor (EMOSFET) is provided. The EMOSFET has a III-V compound semiconductor substrate and an epitaxial layer structure overlying the III-V compound semiconductor substrate. The epitaxial material layer has a channel layer and at least one doped layer. A gate oxide layer overlies the epitaxial layer structure. The EMOSFET further includes a metal gate electrode overlying the gate oxide layer and source and drain ohmic contacts overlying the epitaxial layer structure.

Abstract: A mobile cooling apparatus is provided that may be quickly deployed to cool an area. The apparatus is preferably self-contained or substantially self-contained. The apparatus can be either a dedicated trailer with a conventional draft vehicle or a vehicle itself. The apparatus creates an evaporatively cooled volume of air with fine entrained water droplets suspended therein. The apparatus transfers the cooling suspension to an area to be cooled proximate the apparatus.