Coil component

Patent metadata

Field	Value
Publication number	US-11289251-B2
Application number	US-201816013588-A
Country	US
Kind code	B2
Filing date	Jun 20, 2018
Priority date	Oct 20, 2017
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A coil component includes a body in which a coil portion is disposed, and external electrodes connected to the coil portion. The body includes metal particles formed of an Fe-based nanocrystal grain alloy, and the Fe-based nanocrystal grain alloy has one peak or two peaks in a differential scanning calorimetry (DSC) graph, and when the Fe-based nanocrystal grain alloy has the two peaks, a primary peak is smaller than a secondary peak, where the primary peak is at a lower temperature than the secondary peak.

First claim

What is claimed is:

1. A coil component comprising:
a body in which a coil portion is disposed; and
external electrodes connected to the coil portion,
wherein the body includes metal particles formed of an Fe-based alloy,
the Fe-based alloy has one peak or two peaks in a differential scanning calorimetry (DSC) graph, and when the Fe-based alloy has the two peaks, a primary peak is smaller than a secondary peak, where the primary peak is at a lower temperature than the secondary peak, and
the Fe-based alloy has the one peak in a differential scanning calorimetry (DSC) graph within a range from 600° C. to 800° C. without a peak less than 600° C.

2. The coil component of claim 1 , wherein the Fe-based alloy has the two peaks, and a maximum height of the primary peak is 80% or less of a maximum height of the secondary peak.

3. The coil component of claim 1 , wherein the Fe-based alloy has the two peaks, and the maximum height of the primary peak is 50% or less of the maximum height of the secondary peak.

4. The coil component of claim 1 , wherein the Fe-based alloy has the two peaks, and the maximum height of the primary peak is 20% or less of the maximum height of the secondary peak.

5. The coil component of claim 1 , wherein the metal particle includes nanocrystal grains formed of the Fe-based alloy, and
an average size of the nanocrystal grains is within a range from 20 nm to 50 nm.

6. The coil component of claim 1 , wherein the Fe-based alloy is represented by a composition formula of Fe (100-a-x-y-z-p-q) Co a Si x B y M z Cu p P q in which 0≤a≤0.5, 2≤x≤17, 6≤y≤15, 0<z≤5, 0.5≤p≤1.5, 0≤q≤8, and M is at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W.

7. The coil component of claim 1 , wherein the Fe-based alloy has the two peaks.

8. The coil component of claim 7 , wherein the secondary peak is within a range from 600° C. to 800° C.

9. An Fe-based alloy represented by a composition formula of Fe (100-a-x-y-z-p-q) Co a Si x B y M z Cu p P q in which 0≤a≤0.5, 2≤x≤17, 6≤y≤15, 0<z≤5, 0.5≤p≤1.5, 0≤q≤8, and M is at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W,
wherein the Fe-based alloy has one peak or two peaks in a differential scanning calorimetry (DSC) graph, and
the Fe-based alloy has the one peak in a differential scanning calorimetry (DSC) graph within a range from 600° C. to 800° C. without a peak less than 600° C.

10. The Fe-based alloy of claim 9 , wherein the Fe-based alloy has the two peaks, and a primary peak is smaller than a secondary peak.

11. The Fe-based alloy of claim 9 , wherein the Fe-based alloy has the two peaks, and a maximum height of the primary peak is 80% or less of a maximum height of the secondary peak.

12. The Fe-based alloy of claim 9 , wherein the Fe-based alloy has the two peaks, and the maximum height of the primary peak is 50% or less of the maximum height of the secondary peak.

13. The Fe-based alloy of claim 9 , wherein the Fe-based alloy has the two peaks, and the maximum height of the primary peak is 20% or less of the maximum height of the secondary peak.

14. The Fe-based alloy of claim 9 , wherein the Fe-based alloy includes nanocrystal grains, and
an average size of the nanocrystal grains is within a range from 20 nm to 50 nm.

15. The Fe-based alloy of claim 9 , wherein the Fe-based alloy has the two peaks.

16. The Fe-based alloy of claim 15 , wherein the secondary peak is within a range from 600° C. to 800° C.

Assignees

• Samsung Electro Mech

Inventors

• Kwon Sang Kyun
• Ryu Han Wool
• Choi Chang Hak

Classifications

• B22F1/102

  Metallic powder coated with organic material · CPC title

• B22F1/054

  Nanosized particles · CPC title

• C22C2202/02

  Magnetic · CPC title

• H01F27/292

  Surface mounted devices · CPC title

• H01F1/153 Primary

  Amorphous metallic alloys, e.g. glassy metals {(making ferrous amorphous alloys C22C33/003)} · CPC title