Abstract: A doping and multi-chamber method and apparatus for the growth of material, directed toward Solid Phase Epitaxy (SPE) process, is disclosed. Different variations and features of this method and process are examined. The advantages of this method are the high throughput and the reduced operational cost of the production for semiconductor material and devices, such as III-V material (e.g. GaAs) and solar cell devices. It can be applied to many systems and devices/materials.

Abstract: A novel concentrator system is described, which increases the efficiency of collecting and concentrating sunlight energy onto a target. This method uses an array of small movable reflective or refractive concentrator components that can move via a feedback mechanism which tracks the sun and concentrates the suns energy on to a second array of energy converting elements. In order to improve the effective collected energy, the array of concentrator elements is placed on a moving or tiltable flat slab (or dish, substrate, plane, plate, holder, tablet, or similar flat or non-flat surface) that tracks the sun. An alternative method uses an array of target elements or linear elements and a second array of concentrator elements in harmony such that the suns energy is efficiently redistributed by the reflective or refractive array on to the energy converting array as the sun's position in the sky (elevation and azimuth) changes.

Abstract: A novel concentrator system is described, which increases the efficiency of collecting and concentrating sunlight energy onto a target. This method uses an array of small movable reflective or refractive concentrator components that can move via a feedback mechanism which tracks the sun and concentrates the suns energy on to a second array of energy converting elements. In order to improve the effective collected energy, the array of concentrator elements is placed on a moving or tiltable flat slab (or dish, substrate, plane, plate, holder, tablet, or similar flat or non-flat surface) that tracks the sun. An alternative method uses an array of target elements or linear elements and a second array of concentrator elements in harmony such that the suns energy is efficiently redistributed by the reflective or refractive array on to the energy converting array as the sun's position in the sky (elevation and azimuth) changes.

Abstract: A novel concentrator system is described, which increases the efficiency of collecting sunlight energy and concentrates it on a target. This method uses an array of small movable reflective or refractive concentrator components that can move via a feedback mechanism which tracks the sun and concentrates the suns energy on to a second array of energy converting elements. In order to improve the effective collected energy, the array of concentrator elements is placed on a moving or tiltable flat slab (or dish, substrate, plane, plate, holder, tablet, or similar flat or non-flat surface) that tracks the sun. An alternative method uses an array of target elements or linear elements and a second array of concentrator elements in harmony such that and suns energy is efficiently redistributed by the reflective/reactive array on to the energy converting array as the sun's position in the sky (elevation and azimuth) changes.

Abstract: A novel concentrator system is described, which increases the efficiency of collecting sunlight energy and concentrates it on a target. This method uses an array of small movable reflective or refractive concentrator components that can move via a feedback mechanism which tracks the sun and concentrates the suns energy on to a second array of energy converting elements. In order to improve the effective collected energy, the array of concentrator elements is placed on a moving or tiltable flat slab (or dish, substrate, plane, plate, holder, tablet, or similar flat or non-flat surface) that tracks the sun. An alternative method uses an array of target elements or linear elements and a second array of concentrator elements in harmony such that and suns energy is efficiently redistributed by the reflective/reactive array on to the energy converting array as the sun's position in the sky (elevation and azimuth) changes.

Abstract: The current application deals with the doping and multi-chamber method and apparatus for the growth of material, directed toward Solid Phase Epitaxy (SPE) process. We will examine different variations and features of this method and process. The advantages of this method are the high throughput and the reduced operational cost of the production for semiconductor material and devices, such as III-V material (e.g. GaAs) and solar cell devices. It can be applied to many systems and devices/material.

Abstract: Application of Solid Phase Epitaxy (SPE) fabrication technology to very high efficiency radiation hardened solar cells, and the corresponding system and method, are presented. The heteroepitaxial structure of ZnSe/GaAs/Ge is realizable, due to the adequate lattice matching of the component crystals. It offers several advantages compared to the other solar cell systems based on AlxGa1-xAs/GaAs/Ge/Si type of heteroepitaxial photovoltaic solar energy converters. The active p-n junction is maintained in the well-known high power conversion efficiency of GaAs. ZnSe is a direct large band gap semiconductor. Therefore, the energy integration effect of the graded band structure of the type ZnxGaySe1-xAs1-y, created at the heteroepitaxial interface, is extended, with respect to the one present in the GaxAl1-xAs system. This graded band gap phenomenon introduces a built-in potential, improving the capture efficiency of the GaAs p-n junction, placed to its close vicinity.

Abstract: A novel radiofrequency signal processing system such as an LMDS transceiver is disclosed. The radiofrequency signal processing system includes a receive switch with an input terminal connected to receive an incoming radiofrequency signal. A first signal reception processing block with an input terminal connected to a first output terminal of the receive switch processes the incoming radiofrequency signal within a first frequency band. A second signal reception processing block with an input terminal connected to the second output terminal of the receive switch processes the incoming radiofrequency signal within a second frequency band. A transmit switch has an output terminal connected to transmit an outgoing radiofrequency signal. A first signal transmission processing block with an output terminal connected to the first input terminal of the transmit switch processes the outgoing radiofrequency signal within a third frequency band.

Abstract: A radio frequency signal processing system such as an LMDS transceiver includes a receive switch, a first signal reception processing block, a second signal reception processing block, a transmit switch, a first signal transmission processing block, a second signal transmission processing block, and a controller to transmit the incoming radio frequency signal to a selected one of the first and second signal reception processing blocks, and causes the transmit switch to receive the outgoing radio frequency signal from a selected one of the first and second signal transmission processing blocks. Multiple frequency ranges may therefore be handled by a single LMDS transceiver, enabling low-cost mass production of the transceiver.

Abstract: Apparatus for performing SPE deposition for growing layers of semiconductive material includes a reaction chamber and means for mounting a substrate wafer and a source wafer in the reaction chamber. The substrate wafer and the source wafer are maintained at a predetermined distance which is less than the mean free path of the reactive species of the oxido-reduction of the semiconductive material. A heater for heating the wafers maintains a temperature difference of 20.degree. C. to 40.degree. C. between the wafers.