COIL COMPONENT

• US 20190057801A1
• Filed: 01/09/2018
• Published: 02/21/2019
• Est. Priority Date: 08/18/2017
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: LEE, Hwan Soo, CHO, Yoon Hee, SONG, Sung Min
• Granted Patent: US 10,600,550 B2
• Time in Patent Office: Days
• CPC Class Codes: B22F 1/00 Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
• CPC Class Codes: B22F 1/10 Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
• CPC Class Codes: B22F 1/12 Metallic powder containing non-metallic particles containing lubricating or binding agents or organic material B22F1/10
• CPC Class Codes: B22F 2999/00 Aspects linked to processes or compositions used in powder metallurgy
• CPC Class Codes: B32B 15/012 one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
• CPC Class Codes: B32B 15/013 one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
• CPC Class Codes: B32B 15/018 one layer being formed of a noble metal or a noble metal alloy
• CPC Class Codes: C22C 33/0207 Using a mixture of prealloyed powders or a master alloy mixtures of metal powder in general B22F1/09
• CPC Class Codes: C22C 33/0257 characterised by the range of the alloying elements
• CPC Class Codes: C22C 38/00 Ferrous alloys, e.g. steel alloys cast-iron alloys C22C37/00
• CPC Class Codes: C22C 45/02 with iron as the major constituent
• CPC Class Codes: H01F 1/15308 based on Fe/Ni H01F1/15325 takes precedence
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 27/255 made from particles H01F27/26 takes precedence
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 41/0246 Manufacturing of magnetic circuits by moulding or by pressing powder magnetic cores made by moulding or by pressing powder H01F27/255; soft magnetic particles H01F1/20, H01F1/36

Abstract

A coil component includes a body having a volume of 2.4 mm³ or less and including at least one coil member embedded therein, and first and second external electrodes partially or entirely formed on first and second surfaces of the body opposing each other, respectively, wherein the product of inductance Ls (μH) and S/l (mm) is 0.45 (μH·mm) or more to 0.75 (μH·mm) or less in which S (mm²) is an area of regions of the first and second external electrodes disposed on the first and second surfaces of the body, and 1 (mm) is a minimum spaced distance between the first and second external electrodes formed on the first and second surfaces of the body.

Claims

1. A coil component comprising:

a body having a volume of 2.4 mm³ or less and including at least one coil member embedded therein; and

first and second external electrodes partially or entirely formed on first and second surfaces of the body opposing each other, respectively,

wherein the product of inductance Ls (μ

H) and S/l (mm) is 0.45 (μ

H·

mm) or more to 0.75 (μ

H·

mm) or less in which S (mm²) is an area of regions of the first and second external electrodes disposed on the first and second surfaces of the body, and 1 (mm) is a minimum spaced distance between the first and second external electrodes formed on the first and second surfaces of the body.

2. The coil component of claim 1, wherein the body has a volume of 2.2 mm³ or less.

3. The coil component of claim 1, wherein the product of inductance Ls (μ

H) and S/l (mm) is 0.50 (μ

H·

mm) or more to 0.70 (μ

H·

mm) or less.

4. The coil component of claim 1, wherein the inductance Ls is in a range from 0.68 to 2.2 μ

H.

5. The coil component of claim 1, wherein a self resonant frequency (SRF) thereof is in a range from 95 to 105 MHz.

6. The coil component of claim 1, wherein the first and second external electrodes are extended to at least one of the other surfaces of the body connected to the first and second surfaces of the body.

7. The coil component of claim 1, wherein the body contains first and second magnetic powder particles having different average particle sizes from each other.

8. The coil component of claim 7, wherein the first magnetic powder has an average particle size of 1 to 3 μ

m, and the second magnetic powder has an average particle size of 20 to 24 μ

m.

9. The coil component of claim 7, wherein the first magnetic powder is a Fe based crystalline powder, and the second magnetic powder is a FeCrSi based amorphous powder.

10. The coil component of claim 1, wherein the coil member includes:

a coil substrate; and

first and second coil conductors formed on a first surface and a second surface of the coil substrate opposing each other, respectively.

11. The coil component of claim 10, wherein the first coil conductor has a first lead extended to be exposed to the first surface of the body, and the second coil conductor has a second lead extended to be exposed to the second surface of the body.

12. The coil component of claim 10, wherein the first and second coil conductors are connected to each other through an internal via penetrating through the coil substrate.

13. The coil component of claim 1, further comprising a surface insulating layer formed on a region of outer surfaces of the body except for regions of the outer surfaces of the body on which the first and second external electrodes are formed.