Abstract: There is provided a piezoelectric device including: a body portion having a plurality of piezoelectric layers stacked therein; and internal electrodes disposed in the body portion with at least one of the plurality of piezoelectric layers interposed therebetween and including a shrinkage inhibitor having at least one of a flake shape and a plate shape, wherein an angle formed by an interface between the internal electrode and the piezoelectric layer on which the internal electrode and the piezoelectric layer are in contact and a long side direction of the shrinkage inhibitor is 15° or less.

Abstract: The present disclosure relates to a multilayer piezoelectric element which includes a plurality of piezoelectric layers with a thickness of 15 ?m to 100 ?m each; and internal electrodes interposed between the plurality of piezoelectric layers and laminated to alternately form an anode and a cathode.

Abstract: There is provided an antenna module formed to correspond to an opening formed in a frame, including: a coil conductor part disposed in the opening of the frame when viewed on a plane; and a substrate including the coil conductor part formed thereon. The coil conductor part is wound outside a non-conductive portion of the substrate.

Abstract: There is provided a camera module including: a lens housing in which a lens is disposed; a glass cover formed of a transparent material and covering the lens housing; and a coil conductive part formed between an outer surface of the lens and an inner surface of the glass cover.

Abstract: Disclosed herein are a piezoelectric actuator module and a method of manufacturing the same. The piezoelectric actuator module includes: a plate; a piezoelectric element disposed on the plate and having a through-hole formed therein; and a feeding wire inserted into the through-hole to apply an external voltage to the piezoelectric element.

Abstract: There is provided a piezoelectric device, including a laminated body in which a plurality of piezoelectric sheets including a first piezoelectric substance having a single crystal structure and a second piezoelectric substance having a polycrystalline structure are laminated, first and second internal electrodes interposed between the piezoelectric sheets and alternating so as to have different polarities in a laminated direction, and first and second external electrodes formed on one surface of the laminated body to be electrically connected to the first and second internal electrodes, wherein the first piezoelectric substance has an aspect ratio (d/l) of 1/8 to 1/4.

Abstract: The present invention relates to a piezoelectric device. A piezoelectric device in accordance with an embodiment of the present invention includes a piezoelectric member and a connection member which are coupled to each other, wherein the piezoelectric member includes a polycrystalline member made of a polycrystalline piezoelectric material, a single crystal member made of a single crystal piezoelectric material and coupled to the connection member, and a textured member provided between the polycrystalline member and the single crystal member and having intermediate properties of the polycrystalline piezoelectric material and the single crystal piezoelectric material.

Abstract: There are provided a method and an apparatus for manufacturing a metal nanopowder having a uniform particle size distribution by uniformly applying current to a center portion of the metal wire and a surface portion thereof. The method includes increasing a surface roughness of a metal wire; supplying the metal wire having the increased surface roughness to an electrode in a reaction chamber; and wire-exploding the metal wire by supplying electrical energy to the electrode.

Abstract: There is provided a method for manufacturing a metal nanopowder having a uniform particle size distribution by uniformly applying current to the entirety of a metal raw material, while reducing energy usage, and an apparatus for manufacturing the same. The method includes disposing a metal foil in a reaction chamber; supplying direct current (DC) energy to the metal foil disposed in the reaction chamber; and supplying pulse energy to the metal foil to which the DC energy is supplied, thereby wire-exploding the metal foil.

Abstract: Provided is a composite for manufacturing a chip part for a high frequency, and the composite includes a magnetic powder having a relatively spherical shape, and a metal magnetic body particle having a relatively more amorphous shape than that of the magnetic powder and a lower hardness than that of the magnetic powder.

Abstract: Disclosed herein is a metal magnetic powder, and the metal magnetic powder according to the exemplary embodiment of the present invention includes a soft magnetic core particle and a multilayer coating film covering the core particle and having a multilayer structure, the multilayer coating film including an oxide film formed by heat treating the core particle and an insulation film formed by coating a coating particle with respect to the core particle.

Abstract: Disclosed herein are a composite material including an anisotropic filler and a component having directionality, wherein the component having directionality has a length in a range of 1.5 to 20 based on a length of the anisotropic filler, a method for preparing thereof, and a substrate using the same as an insulation layer. According to the exemplary embodiment of the present invention, in the composite material using the anisotropic filler, the component having directionality is used for controlling the dispersion directionality of the anisotropic filler, whereby at the time of orientation of the component having directionality, the directionality in which the anisotropic filler is dispersed may be controlled to improve the dispersion of the anisotropic filler.

Abstract: There is provided a method of forming a nanoparticle including: preparing a wire formed of a material for forming a nano-sized particle; connecting the wire to first and second electrodes; pre-heating the wire using a pre-heating device; and applying energy to the wire using a power supply to form the nano-sized particle, wherein after the pre-heating is performed, a skin depth of the wire is larger than a radius of the wire.

Abstract: An inorganic filler including a closed pore having a content of 1 to 30 vol. %, an insulation layer including the same, and a substrate using the insulation layer. With the insulation layer using the inorganic filler prepared so as to include a closed pore corresponding to a change rate in volume, the closed pore may offset change in volume in the inorganic filler and release stress, thereby improving a coefficient of thermal expansion according to change in temperature of the insulation layer.

Abstract: There is provided a piezoelectric device, including: a multilayered body in which a piezoelectric layer having a first internal electrode formed thereon and a piezoelectric layer having a second internal electrode formed thereon are alternately formed; a first insulating via formed in the first internal electrode layer; a second insulating via formed in the second internal electrode layer; a first conductive via formed in the multilayered body and penetrating through the first insulating via; and a second conductive via formed in the multilayered body and penetrating through the second insulating via, wherein a diameter of the first insulating via is larger than a diameter of the first conductive via, and a diameter of the second insulating via is larger than a diameter of the second conductive via.

Abstract: There are provided a piezoelectric vibration module and a vibration generating apparatus including the same. The piezoelectric vibration module includes: a piezoelectric actuator including a piezoelectric element deformed in both a first direction and a second direction perpendicular to the first direction through the application of electrical power thereto; at least one first rod transferring deformation force of the piezoelectric actuator in the first direction; at least one second rod converting deformation force of the piezoelectric actuator in the second direction into deformation force in the first direction and transferring the converted deformation force; and a mass body connected to the first and second rods and disposed on the piezoelectric actuator so that displacement is generated in the first direction.

Abstract: There is provided a haptic feedback actuator module including: a base member including an insertion groove formed in an edge thereof and communications grooves formed at both ends of the insertion groove; a piezoelectric element inserted into the insertion groove; an impact transferring member installed in the communications groove and contacting a display panel or spaced apart from the display panel during deformation of the piezoelectric element; and a connecting member having one end connected to the piezoelectric element and the other end connected to the impact transferring member.

Abstract: Disclosed herein are a touch panel including: a transparent substrate; an interface layer formed on one surface of the transparent substrate; and a metal mesh type electrode pattern formed on the interface layer, and a method of manufacturing the same. In the case in which the interface layer is formed on the transparent substrate, a mirror surface property of the interface is decreased, thereby making it possible to provide a black oxidation property in which reflectivity of a bonded interface and a color feeling unique to a metal are decreased. Therefore, visibility of the electrode pattern is decreased to suppress a phenomenon that the electrode pattern is viewed by user's eyes, such that visibility of the touch panel is improved, thereby making it possible to improve quality of the touch panel.

Abstract: Disclosed herein is a method for surface treating metal nano particles, including: surface treating metal nano particles with an alkanol amine containing solution.

Abstract: Disclosed herein are a cleaning apparatus of magnetic nanoparticles and a cleaning method of magnetic nanoparticles using the same. The cleaning apparatus of magnetic nanoparticles includes: a cleaning bath into which a solvent and magnetic nanoparticles are fed; a magnet member that is formed at a lower portion of the cleaning bath to separate the magnetic nanoparticles; and a discharge means that discharges the solvent from which the magnetic nanoparticles are separated.