Abstract: A method including forming a III-V compound layer on a substrate and implanting a main dopant in the III-V compound layer to form source and drain regions. The method further includes implanting a group V species into the source and drain regions. A semiconductor device including a substrate and a III-V compound layer over the substrate. The semiconductor device further includes source and drain regions in the III-V layer, wherein the source and drain regions comprises a first dopants and a second dopant, and the second dopant comprises a group V material.

Abstract: An illuminating device has a board with multiple holes. Multiple domes are formed on a top side of the board and respectively located among the holes. An energy transferring film is coated on the top side of the board. Multiple light sources are respectively inserted into the holes and erected from the top side of the board. Therefore, lights emitted from the light sources can be refracted by the domes to irradiate plants at a desired direction. Exhaust heat of the light source and light rays projected on the board can be transferred to far infrared light rays with wavelength of 4-12 ?m by the film to irradiate the plants again for promoting the growth of the plants.

Abstract: An air purifier, which is mainly comprised of shell body, high-voltage electric sources, ionizing device, at least an electricity-conducting plate, and at least a set of metal filtering net set, wherein, the ionizing device and the metal filtering net set are connected to the high-voltage electric sources of same polarity. And, the electricity-conducting plates are spaced apart by the manner of appropriate distance and are arranged in parallel to the side surface of the metal filtering net set. By arranging the ionizing device at the position of air inlet, the air and micro-dusts sucked into the purifier are charged with charges. And, in the interior, by arranging a metal filtering net set comprised of at least one piece of charged metal filtering net, the charged micro-dusts in the air flowing through the metal filtering net set are expelled by the same polarity charges on the metal filtering net set and pushed toward the electricity-conducting plate located at the position adjacent to the air inlet.

Abstract: An electronic dust collecting type air purifier which includes a dust collecting device, which includes a plurality of electrically insulative trays arranged in a stack, a plurality of filter beds made from metal wire coils and respectively mounted in the trays, and an anion generating apparatus having an input terminal connected to one filter bed to receive electrons from it and an output terminal for discharge of electricity into the air to produce anions for gathering dust, the filter beds, except the one which is connected to the anion generating apparatus, being connected to the grounding terminal.

Abstract: An air purifier including a housing which has two air intake passages at two lateral sides and an induced-draft fan in an air accumulation chamber between the air intake passages, a plurality of air filters respectively mounted between the air accumulation chamber and the air intake passages, each air filter including two electrically insulative frames fastened together, and a plurality of metal wire gauze filters, and a high-voltage static electricity generator mounted inside the housing and connected to one metal wire gauze filter, the high-voltage static electricity generator providing high-voltage positive static electricity to one metal wire gauze filters, causing the other metal wire gauze filters to produce positive static electricity at one side and negative static electricity at an opposite side for catching dust from air passing through.