COIL DEVICE

• US 20170229232A1
• Filed: 02/01/2017
• Published: 08/10/2017
• Est. Priority Date: 02/04/2016
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: TSUCHIDA, Setu, KAKIZAKI, Kazuteru, TAKAGI, Nobuo
• Granted Patent: US 10,319,514 B2
• Time in Patent Office: Days
• CPC Class Codes: H01F 17/04 with magnetic core
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/2828 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/29 Terminals; Tapping arrangements for signal inductances
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 27/306 Fastening or mounting coils or windings on core, casing or other support
• CPC Class Codes: H01F 3/10 Composite arrangements of magnetic circuits

Abstract

A coil device comprising; a winding coil including Cu and having a winding part and an extension line part which is pulled out from said winding part, a pair of electrodes made of a conductive material having, a connecting wire part having a connecting wire face connected with the extension line part and a protective face sandwiching said extension line part with said connecting wire face, and a base part provided with a mounting base face at one of the faces of the base and connected to said connecting wire part, a magnetic part including a magnetic material and covering at least said winding part and said connecting wire part.

Claims

1. A coil device comprising;

a winding coil including Cu and having a winding part and an extension line part which is pulled out from said winding part,

a pair of electrodes made of a conductive material having, a connecting wire part having a connecting wire face connected with the extension line part and a protective face sandwiching said extension line part with said connecting wire face, and a base part provided with a mounting base face at one of the faces of the base and connected to said connecting wire part,

a magnetic part including a magnetic material and covering at least said winding part and said connecting wire part.

2. The coil device as set forth in claim 1, wherein said protective face is bended so as to cover said extension line part in circumference direction at between said connecting line face, and said protective face is continuous with said connecting wire face.

3. The coil device as set forth in claim 1, wherein said connecting wire part comprises the bending part, and said connecting wire face is connected to said base part via said bending part.

4. The coil device as set forth in claim 2, wherein said connecting wire part comprises the bending part, and said connecting wire face is connected to said base part via said bending part.

5. The coil device as set forth in claim 1, wherein said connecting wire part has a conductor piece made of a conductive material and provided with said connecting wire face, and

said conductor piece is fixed against said base part via a bonding part bonding said conductor piece and said base part.

6. The coil device as set forth in claim 1, wherein at least part of said electrodes is formed with Sn layer including Sn, and said mounting base face is constituted by said Sn layer.

7. The coil device as set forth in claim 1, wherein said connecting wire part has a conductor piece made of a conductive material and provided with said connecting wire face,

said base part has Ag part including Ag, Ni layer including Ni, and Sn layer including Sn, and said Sn layer is bonded to said Ag part via said Ni layer, and

said mounting base face is constituted by said Sn layer.

8. The coil device as set forth in claim 1, wherein said connecting wire face is approximately parallel with said mounting base face.

9. The coil device as set forth in claim 1, wherein said magnetic part has a first magnetic part of which a part is positioned at inside of said winding part and other part is positioned between said winding part and said base part, and a second magnetic part covering said winding part and said connecting wire face, and

said first magnetic part has more content of the magnetic material per unit area than said second magnetic part.