Abstract: A method includes forming a fin structure over a substrate, wherein the fin structure comprises first semiconductor layers and second semiconductor layers alternately stacked over a substrate; forming a dummy gate structure over the fin structure; removing a portion of the fin structure uncovered by the dummy gate structure; performing a selective etching process to laterally recess the first semiconductor layers, including injecting a hydrogen-containing gas from a first gas source of a processing tool to the first semiconductor layers and the second semiconductor layers; and injecting an F2 gas from a second gas source of the processing tool to the first semiconductor layers and the second semiconductor layers; forming inner spacers on opposite end surfaces of the laterally recessed first semiconductor layers of the fin structure; and replacing the dummy gate structure and the first semiconductor layers with a metal gate structure.

Abstract: A chip structure for mounting on a clearance area of a printed circuit board includes a packaged chip and a monopole coupling antenna. The packaged chip has an insulating body, an electronic component embedded in the insulating body, and a plurality of grounding pads electrically connected to the electronic component. The monopole coupling antenna has a grounding radiating metal and a monopole radiating metal. The packaged chip is electrically connected to the grounding radiating metal by the grounding pads. The monopole radiating metal is disposed on the insulating body and spaced apart from the electronic component and the grounding radiating metal. The monopole radiating metal is configured to couple the grounding radiating metal and the electronic component by using a feeding circuit to connect the packaged chip and the monopole radiating metal and using a grounding circuit to connect the grounding radiating metal and the printed circuit board.

Abstract: A chip structure for mounting on a clearance area of a printed circuit board includes a packaged chip and a monopole coupling antenna. The packaged chip has an insulating body, an electronic component embedded in the insulating body, and a plurality of grounding pads electrically connected to the electronic component. The monopole coupling antenna has a grounding radiating metal and a monopole radiating metal. The packaged chip is electrically connected to the grounding radiating metal by the grounding pads. The monopole radiating metal is disposed on the insulating body and spaced apart from the electronic component and the grounding radiating metal. The monopole radiating metal is configured to couple the grounding radiating metal and the electronic component by using a feeding circuit to connect the packaged chip and the monopole radiating metal and using a grounding circuit to connect the grounding radiating metal and the printed circuit board.

Abstract: A near field antenna adapted to an object detecting device, for sensing a plurality of units under test of at least an object under test. The near field antenna comprises a periodic guided-wave structure, a metallic reflection portion and at least two near field magnetic coupling antennas. The periodic guided-wave structure disposed below the object under test has a plurality of conductive units periodically arranged on a first plane. The metallic reflection portion is disposed under the periodic guided-wave structure to form an enclosed space. The near field magnetic coupling antennas are disposed on a second plane parallel to the periodic guided-wave structure, and are located in the enclosed space. The feed point and the ground point of each near field magnetic coupling antenna are fed by a coaxial cable with a feeding direction parallel to the periodically arranged conductive units.

Abstract: A near field antenna adapted to an object detecting device, for sensing a plurality of units under test of at least an object under test. The near field antenna comprises a periodic guided-wave structure, a metallic reflection portion and at least two near field magnetic coupling antennas. The periodic guided-wave structure disposed below the object under test has a plurality of conductive units periodically arranged on a first plane. The metallic reflection portion is disposed under the periodic guided-wave structure to form an enclosed space. The near field magnetic coupling antennas are disposed on a second plane parallel to the periodic guided-wave structure, and are located in the enclosed space. The feed point and the ground point of each near field magnetic coupling antenna are fed by a coaxial cable with a feeding direction parallel to the periodically arranged conductive units.

Abstract: A bookcase system is provided. The bookcase system includes at least adjacently arranged two bookcase units. Each of the bookcase units further includes a first RFID reader having an antenna and placed on a first lateral side of the bookcase unit. The bookcase unit further includes a separating structure placed between two of the adjacently arranged bookcase units. The separating structure may further include at least three metal plates forming a three-layer stacked structure, and a lateral side of each of the metal plates is larger than half of a wavelength of an operating frequency of the antenna. And books are placed along a direction parallel to the lateral side.

Abstract: The present disclosure provides a metal plate antenna comprising a radiating portion and at least two grounding pins. The radiating portion is a metal plate and the two ends of the radiating portion are a first end and a second end respectively. The first end and the second end are bended towards the same direction and are perpendicular to the radiating portion. One of the first end and the second end is for the feeding end. At least one of the first end and the second end has at least a plug-foot. The plug-foot is used for plugging into the inserting hole of a circuit board. At least two grounding pins are vertical connected to the radiating portion and one of the grounding pins is used to be connected with the grounding of the circuit board.

Abstract: An antenna structure includes a portable electronic apparatus and an antenna. The portable electronic apparatus includes a housing. At least a metal block is arranged at a corner of the housing. The antenna is arranged in an accommodating space of the housing. The antenna includes a radiator. The radiator includes a rear end and a signal feed-in contact. A distance between the rear end, the signal feed-in contact, and the metal block is about one-fourth wavelength of communication signals, wherein the rear end faces the metal block. Therefore, the SAR of the antenna is reduced.

Abstract: A bookcase system is provided. The bookcase system includes at least adjacently arranged two bookcase units. Each of the bookcase units further includes a first RFID reader having an antenna and placed on a first lateral side of the bookcase unit. The bookcase unit further includes a separating structure placed between two of the adjacently arranged bookcase units. The separating structure may further include at least three metal plates forming a three-layer stacked structure, and a lateral side of each of the metal plates is larger than half of a wavelength of an operating frequency of the antenna. And books are placed along a direction parallel to the lateral side.