Abstract: The present invention relates to a method of manufacturing a dental composite blank, including (a) placing a composite paste in a mold, (b) pressurizing the composite paste placed in the mold at a first pressure (P1), (c) pressurizing the composite paste placed in the mold at a second pressure (P2), and (d) curing the pressurized composite paste, in which each of steps (b) and (c) is performed once or multiple times, and the first pressure (P1) is less than or greater than the second pressure (P2). The dental composite blank and the method of manufacturing the same are effective at dispersing a non-dispersed filler and removing bubbles, thus improving mechanical properties, through repeated pressurization at different pressures before curing the composite paste.

Abstract: A semiconductor package includes an interposer, an electronic device having a first side surface and a second side surface opposite to the first side surface, and including a plurality of memory dies stacked in a vertical direction, at least one first through pipe passing through the electronic device in the vertical direction adjacent to the first side surface, and moving a cooling liquid therein, and a plurality of thermal transmission lines extending in a horizontal direction inside the memory die, and extending in parallel from the first through pipe toward the second side surface.

Abstract: The present invention relates to a cavity filter and a connecting structure included therein. The cavity filter includes: an RF signal connecting portion spaced apart, by a predetermined distance, from an outer member having an electrode pad provided on a surface thereof; and a terminal portion configured to electrically connect the electrode pad of the outer member and the RF signal connecting portion so as to absorb assembly tolerance existing at the predetermined distance and to prevent disconnection of the electric flow between the electrode pad and the RF signal connecting portion, wherein the terminal portion includes: a first side terminal contacted with the electrode pad; and a second side terminal having a housing space in which a part of the first side terminal is housed, and connected to the RF signal connecting portion, wherein the first side terminal is provided as an elastic deformable body whose part is radially widened or narrowed against an assembly force provided by an assembler.

Abstract: A secondary battery includes: a can having an accommodation space therein; an electrode assembly accommodated in the accommodation space in the can; and a cap assembly sealed with the can. The can has a beading part recessed into a side wall of the can at a region below where the cap assembly is accommodated, and the beading part has an acute angle with respect to the side wall of the can.

Abstract: A lens includes a lens unit; an intermediate layer configured to cover a surface portion of the lens unit; and a water-repellent layer, configured to cover a surface portion of the intermediate layer, including a base layer and an ultraviolet (UV) absorber disposed in the base layer.

Abstract: A semiconductor package includes an interposer, an electronic device having a first side surface and a second side surface opposite to the first side surface, and including a plurality of memory dies stacked in a vertical direction, at least one first through pipe passing through the electronic device in the vertical direction adjacent to the first side surface, and moving a cooling liquid therein, and a plurality of thermal transmission lines extending in a horizontal direction inside the memory die, and extending in parallel from the first through pipe toward the second side surface.

Abstract: Disclosed are a magnetic field generating apparatus and a method of generating a magnetic field using the same. A magnetic field generating apparatus according to an embodiment of the present disclosure includes a coil part configured to generate a magnetic field transmitted to the target to which wireless power is to be supplied; a first ferrite member configured to extend in the vicinity of the coil part a bar shape and penetrate an inner peripheral surface of the coil part; and a second ferrite member configured to extend in a dome shape in the vicinity of the coil part, surround the coil part, include an opening formed along the magnetic field transmission path.

Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.

Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.

Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.

Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.

Abstract: Disclosed are a magnetic field generating apparatus and a method of generating a magnetic field using the same. A magnetic field generating apparatus according to an embodiment of the present disclosure includes a coil part configured to generate a magnetic field transmitted to the target to which wireless power is to be supplied; a first ferrite member configured to extend in the vicinity of the coil part a bar shape and penetrate an inner peripheral surface of the coil part; and a second ferrite member configured to extend in a dome shape in the vicinity of the coil part, surround the coil part, include an opening formed along the magnetic field transmission path.

Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.

Abstract: Disclosed are a three-phase wireless power transfer (WPT) system and three-phase wireless rechargeable unmanned aerial vehicle (UAV) system based on the same. Three power receiving coils, including resonators, are installed at the ends of three landing leg of the UAV. A three-phase power converter installed in the UAV receives the three-phase AC induction current induced in three power receiving coils, including resonators, converting the three-phase AC induction current into a DC current to be charged in a battery. A three-phase power wireless charging apparatus wirelessly transfers three-phase power from three power transmitting coils to the three power receiving coils of the UAV when the three landing legs land on three coil seating units provided on a charging platform. A magnetic flux leakage shielding coil may be provided to prevent magnetic flux leakage from approaching the UAV. The power transfer efficiency is excellent, and electromagnetic interference can be also reduced.

Abstract: Disclosed are a three-phase wireless power transfer (WPT) system and three-phase wireless rechargeable unmanned aerial vehicle (UAV) system based on the same. Three power receiving coils, including resonators, are installed at the ends of three landing leg of the UAV. A three-phase power converter installed in the UAV receives the three-phase AC induction current induced in three power receiving coils, including resonators, converting the three-phase AC induction current into a DC current to be charged in a battery. A three-phase power wireless charging apparatus wirelessly transfers three-phase power from three power transmitting coils to the three power receiving coils of the UAV when the three landing legs land on three coil seating units provided on a charging platform. A magnetic flux leakage shielding coil may be provided to prevent magnetic flux leakage from approaching the UAV. The power transfer efficiency is excellent, and electromagnetic interference can be also reduced.

Abstract: An unmanned aerial vehicle includes a body portion, a plurality of driving portions, a plurality of arms and first and second landing members. The body portion is formed at a center thereof, and the body portion includes an inner space defined by an upper plate, a lower plate and a plurality of supporting frames that connect the upper plate with the lower plate. The plurality of driving portions generate an impellent force for a flight. Each of the plurality of arms has one end connected to the body portion and the other end connected to one of the driving portions.

Abstract: An unmanned aerial vehicle includes a body portion, a plurality of driving portions, a plurality of arms and first and second landing members. The body portion is formed at a center thereof, and the body portion includes an inner space defined by an upper plate, a lower plate and a plurality of supporting frames that connect the upper plate with the lower plate. The plurality of driving portions generate an impellent force for a flight. Each of the plurality of arms has one end connected to the body portion and the other end connected to one of the driving portions.

Abstract: A test device for testing a semiconductor device including a TSV may comprise a ring oscillator including a plurality of inverters, a switch selectively connecting an output node of an inverter of the plurality of inverters and the TSV, and a controller controlling the switch.

Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.

Abstract: A test device for testing a semiconductor device including a TSV may comprise a ring oscillator including a plurality of inverters, a switch selectively connecting an output node of an inverter of the plurality of inverters and the TSV, and a controller controlling the switch.