Abstract: An antenna device includes: a magnetic portion comprising a first surface and a second surface opposing the first surface; and a coil portion including a conductive wiring comprising a plurality of turns wound around the magnetic portion in a solenoid form, wherein in the coil portion, intervals between turns of the conductive wiring disposed on the first surface and intervals between turns of the conductive wiring disposed on the second surface are different from each other. Therefore, a recognition rate of the antenna device may be improved.

Abstract: A terminal for magnetic secure transmission (MST) includes a body including a magnetic head and a coil member wound around the magnetic head, and an electromagnetic wave shielding structure disposed around the magnetic head and being formed of a magnetic material.

Abstract: A magnetic field shielding structure includes a magnetic layer and a resonance reactive shielding circuit including a capacitor and a conductor connected to the capacitor and having a loop form. At least a portion of the magnetic layer overlaps an area surrounded by the conductor in a thickness direction of the magnetic layer.

Abstract: A method of manufacturing a magnetic substance includes forming crack lines arranged in one direction on a magnetic sheet by crushing the magnetic sheet to divide the magnetic sheet by the crack lines; stacking the magnetic sheet with other magnetic sheets into layers; and press-processing the stacked magnetic sheets.

Abstract: A magnetic sheet includes one or more magnetic layers formed of a metal ribbon, the metal ribbon includes fragments with metal oxide coating layers formed in spaces between the fragments.

Abstract: A sheet for shielding against electromagnetic waves includes a first magnetic material having a plurality of through holes formed in a thickness direction, and a second magnetic material filling the plurality of through holes and blocking a frequency band different from that of electromagnetic waves blocked by the first magnetic material.

Abstract: A sheet for shielding against electromagnetic waves and a wireless power charging device are provided. The sheet for shielding against electromagnetic waves includes a plurality of magnetic layers and an adhesive layer interposed between the plurality of magnetic layers and forming chemical bonds with an adjacent magnetic layer.

Abstract: A wireless communication antenna includes: a magnetic body including a plurality of bar-shaped unit ribbons arranged in columns, wherein the unit ribbons have shape anisotropy and a radiation direction on a side of the wireless communication antenna; and a solenoid coil including conductive patterns disposed around the magnetic body.

Abstract: A sheet for shielding electromagnetic waves includes a magnetic sheet formed of a metal ribbon. The magnetic sheet includes fractures disposed in a plurality of cracked portions comprising a plurality of metal ribbon fragments.

Abstract: A method for manufacturing a magnetic sheet includes applying a roller having protrusions to a surface of a magnetic sheet to form recesses in the magnetic sheet. Functional regions having different degrees of compression are formed in the surface of the magnetic sheet by applying the roller.

Abstract: A sheet for shielding electromagnetic waves includes a magnetic sheet formed of a metal ribbon. The magnetic sheet includes fractures disposed in a plurality of cracked portions comprising a plurality of metal ribbon fragments.

Abstract: A sheet for shielding against electromagnetic waves and a wireless power charging device are provided. The sheet for shielding against electromagnetic waves includes a plurality of magnetic layers and an adhesive layer interposed between the plurality of magnetic layers and forming chemical bonds with an adjacent magnetic layer.

Abstract: A sheet for shielding against electromagnetic waves includes a first magnetic material having a plurality of through holes formed in a thickness direction, and a second magnetic material filling the plurality of through holes and blocking a frequency band different from that of electromagnetic waves blocked by the first magnetic material.

Abstract: A nonaqueous ink composition for an ink jet and a method of manufacturing ink comprising the same are provided. The nonaqueous ink composition for the ink jet includes: a glycol ether acetate solvent represented by a specific chemical formula; and a polypropylene glycol binder represented by a specific chemical formula. The nonaqueous ink composition for an ink jet has dynamic viscoelasticity obtained by a chemical interaction between the solvent and the binder, exhibits excellent print quality and is capable of high-speed printing.

Abstract: Disclosed herein is a conductive polymer composition capable of deteriorating water-absorption property and maintaining electrical conductivity by neutralizing polyethylenedioxythiophene/polystyrenesulfonate (PEDOT/PSS) with dicyclohexylmethylamine which is lipid-soluble tertiary amine, and a conductive film using the same.

Abstract: This invention relates to a surface modified silica by an alkyl sulfonated tetrazole compound, a preparation method thereof, and a resin composition containing the same. The silica according to this invention can exhibit superior adhesion to a metal.

Abstract: Disclosed herein are a resin composition for a printed circuit board, an insulating film, a prepreg, and a printed circuit board, the resin composition including: a composite epoxy resin containing a bisphenol A type epoxy resin, a cresol novolac epoxy resin, a rubber-modified epoxy resin, a phosphorus based epoxy resin, and an alkyl sulfonated tetrazole-modified epoxy resin; and a curing agent. The insulating film and the prepreg according to the present invention may have basically low coefficient of thermal expansion, excellent heat resistance, a high glass transition temperature, and excellent adhesion force with the metal.

Abstract: This invention relates to a surface modified silica by an alkyl sulfonated tetrazole compound, a preparation method thereof, and a resin composition containing the same. The silica according to this invention can exhibit superior adhesion to a metal.

Abstract: The present invention provides an alkyl sulfonated tetrazole compound, a method of preparing the same, an epoxy resin containing the same and a substrate produced therefrom. The epoxy resin is usefully used as a raw material of printed circuit boards, and has high adhesion to metal.

Abstract: Disclosed herein is a method of manufacturing a build-up printed circuit board (PCB), the method including: providing a first resin substrate; forming a roughness by coating an epoxy emulsion solution on a surface of the first resin substrate; and providing a core layer by forming a core circuit layer on the first resin substrate on which the roughness is formed. According to the present invention, roughness of a substrate can be formed in an environment-friendly and economical way by introducing a process of coating epoxy emulsion on a resin substrate. Further, a highly reliable fine circuit can be implemented by enhancing an adhesive bond between a build-up board material and a metal circuit layer.