Coil type unit for wireless power transmission, wireless power transmission device, electronic device and manufacturing method of coil type unit for wireless power transmission
The present invention relates to a coil type unit for wireless power transmission, a wireless power transmission device, an electronic device, and a manufacturing method of a coil type unit for wireless power transmission. A coil type unit for wireless power transmission of the present invention includes a coil portion having a coil pattern on a substrate; a magnetic portion having the coil portion attached to one surface thereof and a conductive pattern formed thereon; an adhesive portion interposed between the magnetic portion and the coil portion to mutually bond the magnetic portion and the coil portion; and a conductive hole for electrically connecting the coil pattern and the conductive pattern, wherein the adhesive portion is formed on one surface of the magnetic portion having the conductive pattern thereon while being formed in an area other than the area in which the conductive pattern is formed.
1. A coil type unit for wireless power transmission, comprising:
a coil portion having a coil pattern formed on a substrate;
a magnetic portion having a conductive pattern;
an adhesive portion interposed between the magnetic portion and the coil portion to bond the magnetic portion and the coil portion to each other; and
a conductive hole formed in the substrate for electrically connecting both ends of the coil pattern and the conductive pattern,
wherein the adhesive portion is formed on one surface of the magnetic portion having the conductive pattern formed thereon while being formed in an area other than the area in which the conductive pattern is formed, and
wherein the adhesive portion is formed to have the same thickness as the conductive pattern.
2. The coil type unit for wireless power transmission according to claim 1 , wherein the conductive pattern is formed using conductive ink or conductive paste.
3. The coil type unit for wireless power transmission according to claim 1 , wherein the adhesive portion maintains a certain gap with respect to the conductive pattern.
4. The coil type unit for wireless power transmission according to claim 1 , wherein the magnetic portion is formed by performing sintering after laminating one or more magnetic sheets.
5. The coil type unit for wireless power transmission according to claim 4 , wherein the magnetic sheet is at least one of a ferrite sheet, a metal sheet, and a hybrid type sheet which uses a combination of metal and ferrite.
6. The coil type unit for wireless power transmission according to claim 1 , wherein the adhesive portion is formed of an adhesive film or an adhesive tape.
7. The coil type unit for wireless power transmission according to claim 1 , wherein the adhesive portion is formed by coating an adhesive or a resin having adhesive properties.
8. The coil type unit for wireless power transmission according to claim 1 , wherein the conductive hole is formed by forming through-holes in the position of the both ends of the coil pattern, bonding the magnetic portion and the coil portion to each other while disposing the through-holes in the position of the conductive pattern, and filling conductive ink or conductive paste in the through-holes.
9. The coil type unit for wireless power transmission according to claim 1 , wherein the substrate is a flexible printed circuit board (FPCB), and the coil pattern has a single-layered pattern shape.