Abstract: Solar radiation is concentrated on a solar cell of a photovoltaic device in the range of 500 to 1600 suns. the photovoltaic device includes a plurality of solar cells on a flat surface of a heat sink, and means for concentrating solar radiation on the solar cells. The solar cells have a surface on which the solar light is incident. This high concentration of solar energy on the solar cell will increase the solar cell operating temperature. The dimensions of the solar cells and the center to center spacing between solar cells is such that good thermal dissipation is maintained in the photovoltaic device.

Abstract: A semiconductor device having a pair of laterally spaced multiple-layer metal films, each located in a different vertically-spaced parallel plane on a body of a single crystalline semiconductor material and a channel between the spaced edges of the pair of metal films. The edges of the pair extend in cantilever fashion over the channel. First and second laterally spaced Schottky-barrier metal films are located in the channel and form gate contacts. The first metal film is located completely beneath the uppermost multiple-layer film. The second metal film is located substantially below an aperture formed between the pair of multiple-layer metal films. A contact pad for the first film is on the outside of the channel near one end thereof, and a contact pad for the second film is located near the other end. The Schottky-barrier films are typically less than 0.8 micrometers wide.