Coil type unit for wireless power transmission, wireless power transmission device, electronic device and manufacturing method of coil type unit for wireless power transmission

A wireless power transmission device comprising a coil type unit for wireless power transmission and a circuit unit for wireless power transmission electrically connected to the coil type unit for wireless power transmission, wherein the coil type unit for wireless power transmission comprises:

• a coil pattern in the form of a wiring pattern;
• a magnetic portion having the coil pattern attached to one surface thereof;
• and
• an adhesive portion interposed between the magnetic portion and the coil pattern to bond the magnetic portion and the coil pattern to each other, wherein the magnetic portion is formed by laminating one or more conductive sheets with one or more magnetic sheets and integrally firing the laminated sheets, and the magnetic portion has conductive holes formed in the position, where both ends of the coil pattern are disposed, to electrically connect the both ends of the coil pattern and the conductive sheet.

An electronic device comprising a wireless power transmission device and a case for accommodating the wireless power transmission device therein, wherein the wireless power transmission device comprises:

• a coil type unit for wireless power transmission;
• and
• a circuit unit for wireless power transmission electrically connected to the coil type unit for wireless power transmission, wherein the coil type unit for wireless power transmission comprises:
• a coil pattern in the form of a wiring pattern;
• a magnetic portion having the coil pattern attached to one surface thereof;
• and
• an adhesive portion interposed between the magnetic portion and the coil pattern to bond the magnetic portion and the coil pattern to each other, wherein the magnetic portion is formed by laminating one or more conductive sheets with one or more magnetic sheets and integrally firing the laminated sheets, and the magnetic portion has conductive holes formed in the position, where both ends of the coil pattern are disposed, to electrically connect the both ends of the coil pattern and the conductive sheet.

A manufacturing method of a coil type unit for wireless power transmission, comprising:

• a sheet lamination step of laminating one or more conductive sheets with one or more magnetic sheets;
• a through-hole formation step of forming through-holes for connecting the conductive sheet to the laminated sheets laminated in the sheet lamination step;
• a firing step of integrally firing the laminated sheets having the through-holes formed therein;
• an adhesive means formation step of forming an adhesive means on the fired laminated sheet while not forming the adhesive means in the position of the through-holes;
• a bonding step of bonding a coil pattern in the form of a wiring pattern to the fired laminated sheet having the through-holes formed therein by the formed adhesive means while disposing both ends of the coil pattern in the position of the through-holes;
• and
• a through-hole filling step of electrically connecting the both ends of the coil pattern and the conductive sheet by filling a conductive material in the through-holes.

A manufacturing method of a coil type unit for wireless power transmission, comprising:

• a sheet lamination step of laminating one or more conductive sheets with one or more magnetic sheets;
• a firing step of integrally firing the laminated sheets laminated in the sheet lamination step;
• an adhesive means formation step of forming an adhesive means on the fired laminated sheet;
• a through-hole formation step of forming through-holes for connecting the conductive sheet to the fired laminated sheet having the adhesive means formed thereon;
• a bonding step of bonding a coil pattern in the form of a wiring pattern to the fired laminated sheet having the through-holes formed therein by the formed adhesive means while disposing both ends of the coil pattern in the position of the through-holes;
• and
• a through-hole filling step of electrically connecting the both ends of the coil pattern and the conductive sheet by filling a conductive material in the through-holes.