Abstract: Disclosed are a MEMS gas sensor and a manufacturing method thereof. The MEMS gas sensor includes a substrate having a recess, a membrane disposed in the recess and having a through-hole configured to expose a portion of a top surface of the substrate, which is disposed at a central portion of the recess, sensing electrodes disposed in the membrane, and a sensing layer disposed on each of bottom and top surfaces of the membrane and disposed in the through-hole.

Abstract: Disclosed are a wireless device capable of being self-powered and an operating method thereof. The wireless device includes an energy harvesting module that generates electrical energy based on energy supplied from an outside, a power management module that generates a voltage based on the electrical energy provided from the energy harvesting module, a user input interface that includes at least one input device sensing an input of a user, and a communication module that transfers a command corresponding to the at least one input device to the outside based on the voltage provided from the power management module, in response to that the at least one input device is accessed by the user.

Abstract: The present disclosure relates to a memory device, and more particularly, to a memory device including a substrate, a plurality of vertical structures disposed on the substrate and including insulation layers and lower electrodes, which are alternately laminated with each other, wherein the vertical structures are aligned in a first direction parallel to a top surface of the substrate and a second direction crossing the first direction, an upper electrode disposed on a top surface and side surfaces of each of the vertical structures, and a first dielectric layer disposed between the upper electrode and the vertical structures to cover the top surface and the side surfaces of each of the vertical structures. Here, the first dielectric layer includes a ferroelectric material.

Abstract: Disclosed are a wireless device capable of being self-powered and an operating method thereof. The wireless device includes an energy harvesting module that generates electrical energy based on energy supplied from an outside, a power management module that generates a voltage based on the electrical energy provided from the energy harvesting module, a user input interface that includes at least one input device sensing an input of a user, and a communication module that transfers a command corresponding to the at least one input device to the outside based on the voltage provided from the power management module, in response to that the at least one input device is accessed by the user.

Abstract: Provided is a gas sensor including a substrate, a first membrane disposed on the substrate, a heating structure disposed on the first membrane, a second membrane disposed on the heating structure, a sensing electrode disposed on the second membrane, and a sensing material structure disposed on the sensing electrode. Here, the substrate provides an isolation space defined by a recessed surface obtained as a portion of a top surface of the substrate is spaced downward from a bottom surface of the first membrane, and the first membrane provides a first membrane etching hole that vertically extends to connect a top surface and the bottom surface of the first membrane and is connected with the isolation space. Also, the first membrane etching hole has a diameter of about 3 ?m to about 20 ?m.

Abstract: Disclosed is a system for tracking a maximum power point. The system includes an energy harvesting device, a power management integrated circuit including a switching circuit that adjusts an input voltage that is transmitted from the energy harvesting device and a conversion circuit that converts the input voltage adjusted by the switching circuit to output an output voltage, and a measuring device that calculates a ratio of a second power based on the input voltage to a first power based on an open circuit voltage of the energy harvesting device, using an internal impedance of the energy harvesting device and an input impedance of the power management integrated circuit.

Abstract: The present disclosure relates to a memory device, and more particularly, to a memory device including a substrate, a plurality of vertical structures disposed on the substrate and including insulation layers and lower electrodes, which are alternately laminated with each other, wherein the vertical structures are aligned in a first direction parallel to a top surface of the substrate and a second direction crossing the first direction, an upper electrode disposed on a top surface and side surfaces of each of the vertical structures, and a first dielectric layer disposed between the upper electrode and the vertical structures to cover the top surface and the side surfaces of each of the vertical structures. Here, the first dielectric layer includes a ferroelectric material.

Abstract: Disclosed is a system for tracking a maximum power point. The system includes an energy harvesting device, a power management integrated circuit including a switching circuit that adjusts an input voltage that is transmitted from the energy harvesting device and a conversion circuit that converts the input voltage adjusted by the switching circuit to output an output voltage, and a measuring device that calculates a ratio of a second power based on the input voltage to a first power based on an open circuit voltage of the energy harvesting device, using an internal impedance of the energy harvesting device and an input impedance of the power management integrated circuit.

Abstract: The present disclosure herein relates to a device for measuring a thermoelectric performance. The device for measuring a thermoelectric performance of a thermoelectric material, which includes a support module configured to generate temperature difference between both ends of the thermoelectric material, a fixing module detachably coupled to the support module to support the thermoelectric material, a temperature measuring unit electrically connected to the fixing module to measure temperature of each of the both ends of the thermoelectric material, and an electromotive force measuring unit electrically connected to the fixing module to measure thermoelectromotive force generated between the both ends of the thermoelectric material. Here, the fixing module includes a first heat sink part and a second heat sink part, which respectively support the both ends of the thermoelectric material.

Abstract: A neuron circuit and an operating method thereof are disclosed. The neuron circuit may include an input unit to which an input pulse is applied, a bipolar memristor configured to have one end connected to one end of the input unit, a first capacitor configured to be connected between the one end of the bipolar memristor and a ground, a first diode configured to have an anode connected to the one end of the bipolar component, a second capacitor configured to have one end connected to a cathode of the first diode, a first switch configured to be connected between the one end of the second capacitor and the ground, and a second switch configured to be connected between the anode of the first diode and the other end of the second capacitor.

Abstract: Provided is a cooling device including a valve structure including a temperature-responsive material that changes in volume in response to changes in temperature, a supporting structure, which is joined to the valve structure and supports the valve structure, and a solvent which contacts the valve structure, wherein a portion of the solvent contacts the valve structure and another portion of the solvent is externally exposed, the valve structure changes in volume in response to changes in temperature and thereby regulating the externally exposed surface area of the solvent.

Abstract: Provided is a cooling device including a valve structure including a temperature-responsive material that changes in volume in response to changes in temperature, a supporting structure, which is joined to the valve structure and supports the valve structure, and a solvent which contacts the valve structure, wherein a portion of the solvent contacts the valve structure and another portion of the solvent is externally exposed, the valve structure changes in volume in response to changes in temperature and thereby regulating the externally exposed surface area of the solvent.

Abstract: The present disclosure herein relates to a device for measuring a thermoelectric performance. The device for measuring a thermoelectric performance of a thermoelectric material, which includes a support module configured to generate temperature difference between both ends of the thermoelectric material, a fixing module detachably coupled to the support module to support the thermoelectric material, a temperature measuring unit electrically connected to the fixing module to measure temperature of each of the both ends of the thermoelectric material, and an electromotive force measuring unit electrically connected to the fixing module to measure thermoelectromotive force generated between the both ends of the thermoelectric material. Here, the fixing module includes a first heat sink part and a second heat sink part, which respectively support the both ends of the thermoelectric material.

Abstract: Provided is a thermoelectric material including a metal silicide film, and silicon particles dispersed in the metal silicide film, the total volume of the silicon particles being greater than the volume of the metal silicide film.

Abstract: Provided is a thermoelectric element. The thermoelectric element includes an insulation substrate, a semiconductor layer on the insulation substrate, insulation layers disposed on the semiconductor layer and spaced apart from each other in a first direction parallel with a surface of the insulation substrate, metal thin films disposed on the insulation layers, and metal-semiconductor compound layers between the semiconductor layer and the second parts. Each of the metal thin films includes a first part overlapping the insulation layer and a second part extending from the first part in the first direction or in a direction opposite to the first direction to be connected to the semiconductor layer, and the second parts facing each other in the metal thin films adjacent to each other are spaced apart from each other.

Abstract: A tactile display device comprises a first electrode, a second electrode, supports between a first and a second electrodes, and an electroactive polymer filled between a supports.

Abstract: Provided is a thermoelectric device. The thermoelectric device includes an upper substrate and a lower substrate, which face each other, and a thermoelectric conversion part disposed between the upper substrate and the lower substrate. The thermoelectric conversion part includes a first electrode disposed on the lower substrate, a second electrode spaced apart from the first electrode in a first direction on the lower substrate, a third electrode spaced apart from the first and second electrodes in a second direction perpendicular to the first direction on the lower substrate, a first thermoelectric member disposed between the first electrode and the third electrode and connected to the first electrode and the third electrode, and a second thermoelectric member disposed between the second electrode and the third electrode and connected to the second electrode and the third electrode.

Abstract: Provided is a thermoelectric element. The thermoelectric element includes an insulation substrate, a semiconductor layer on the insulation substrate, insulation layers disposed on the semiconductor layer and spaced apart from each other in a first direction parallel with a surface of the insulation substrate, metal thin films disposed on the insulation layers, and metal-semiconductor compound layers between the semiconductor layer and the second parts. Each of the metal thin films includes a first part overlapping the insulation layer and a second part extending from the first part in the first direction or in a direction opposite to the first direction to be connected to the semiconductor layer, and the second parts facing each other in the metal thin films adjacent to each other are spaced apart from each other.

Abstract: Provided is a cooling device including opening/closing holes disposed in one side thereof and a cavity. Each of the opening/closing holes is actively opened and closed according to a temperature of an external heat source, and the cavity is connected to the outside of the cooling device through the opening/closing holes.

Abstract: Provided is a thermoelectric material including a metal silicide film, and silicon particles dispersed in the metal silicide film, the total volume of the silicon particles being greater than the volume of the metal silicide film.