# US 2019/0172618 A1 · Hybrid inductor and manufacturing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0172618 A1 - Document ID: US20190172618A1 - Status: Published application - Kind: A1 - Application number: 16/266,617 - Filed: 2019-02-04 - Published: 2019-06-06 - Earliest claimed: 2015-04-01 - Assignees: Samsung Electro-Mechanics Co., Ltd. - Applicants: Samsung Electro-Mechanics Co., Ltd. - Inventors: Ho Yoon KIM; Yu Jin CHOI; Soo Hwan SON; Min Kyoung CHEON - Web page: https://patentgrep.com/patent/US20190172618A1 ## CPC - H01F 3/10: Composite arrangements of magnetic circuits - H01F 17/0013: {with stacked layers} - H01F 17/04: with magnetic core - H01F 41/046: {structurally combined with ferromagnetic material} - H01F 2003/106: {Magnetic circuits using combinations of different magnetic materials} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract A hybrid inductor includes an inductor body having a core part in which a coil part is disposed, and first and second cover parts having the core part interposed therebetween. The core part includes magnetic metal layers, and the first and second cover parts include ferrite layers. ## Claims ### Claim 1 A hybrid inductor comprising: an inductor body having a core part in which a coil part is disposed, and first and second cover parts, the core part being interposed between the first and second cover parts, wherein the core part comprises layers of a first magnetic metal, and each of the first and second cover parts comprises a ferrite layer and a layer of a second magnetic metal disposed on an outer surface of the ferrite layer such that the ferrite layer of each of the first and second cover parts is disposed between one of the layers of the first magnetic metal and the layer of the second magnetic metal, wherein the layer of the second magnetic metal consists of a metal alloy. ### Claim 2 (depends on 1) The hybrid inductor of claim 1, wherein a thickness of the layer of the second magnetic metal is 20% to 100% of a thickness of the ferrite layer in the first and second cover parts. ### Claim 3 (depends on 1) The hybrid inductor of claim 1, wherein at least one of the first magnetic metal and the second magnetic metal magnetic metal comprises an iron (Fe)-based alloy including iron (Fe) and at least one selected from the group consisting of silicon (Si), boron (B), chromium (Cr), aluminum (Al), copper (Cu), niobium (Nb), and nickel (Ni). ### Claim 4 (depends on 1) The hybrid inductor of claim 1, wherein at least one of the first magnetic metal and the second magnetic metal includes magnetic metal particles having a saturation magnetization value of 100 emu/g to 250 emu/g. ### Claim 5 (depends on 1) The hybrid inductor of claim 1, wherein at least one of the first magnetic metal and the second magnetic metal includes magnetic metal particles having a surface on which a metal oxide film is formed. ### Claim 6 (depends on 1) The hybrid inductor of claim 1, wherein at least one of the ferrite layers comprises ferrite including at least one element selected from the group consisting of nickel (Ni) and zinc (Zn). ### Claim 7 (depends on 1) The hybrid inductor of claim 1, wherein at least one of the ferrite layers, comprises a glass including at least one oxide selected from the group consisting of silicon (Si) oxide, lithium (Li) oxide, boron (B) oxide, potassium (K) oxide, calcium (Ca) oxide, and aluminum (Al) oxide. ### Claim 8 (depends on 1) The hybrid inductor of claim 1, wherein the coil part comprises a plurality of coil patterns connected to each other by vias penetrating the layers of the first magnetic metal, the coil patterns being formed on the layers of the first magnetic metal. ### Claim 9 (depends on 3) The hybrid inductor of claim 3, wherein the iron (Fe)-based alloy includes 87 wt % or more of iron (Fe), 4 to 6 wt % of chromium (Cr), and residual silicon, based on a total weight of the iron (Fe)-based alloy. ### Claim 10 A hybrid inductor comprising: an inductor body having a core part in which a coil part is disposed, and first and second cover parts, the core part being interposed between the first and second cover parts, wherein the core part comprises layers of a first magnetic metal, and each of the first and second cover parts comprises a ferrite layer and a layer of a second magnetic metal disposed on an outer surface of the ferrite layer such that the layers of the second magnetic metal are exposed to an external surface of the hybrid inductor, wherein the layer of the second magnetic metal consists a metal alloy. ### Claim 11 (depends on 10) The hybrid inductor of claim 10, wherein a thickness of the layer of the second magnetic metal is 20% to 100% of a thickness of the ferrite layer in the first and second cover parts. ### Claim 12 (depends on 10) The hybrid inductor of claim 10, wherein at least one of the first magnetic metal and the second magnetic metal comprises an iron (Fe)-based alloy including iron (Fe) and at least one selected from the group consisting of silicon (Si), boron (B), chromium (Cr), aluminum (Al), copper (Cu), niobium (Nb), and nickel (Ni). ### Claim 13 (depends on 10) The hybrid inductor of claim 10, wherein at least one of the first magnetic metal and the second magnetic metal includes magnetic metal particles having a saturation magnetization value of 100 emu/g to 250 emu/g. ### Claim 14 (depends on 10) The hybrid inductor of claim 10, wherein at least one of the first magnetic metal and the second magnetic metal includes magnetic metal particles having a surface on which a metal oxide film is formed. ### Claim 15 (depends on 10) The hybrid inductor of claim 10, wherein at least one of the ferrite layers comprises ferrite including at least one element selected from the group consisting of nickel (Ni) and zinc (Zn). ### Claim 16 (depends on 10) The hybrid inductor of claim 10, wherein at least one of the ferrite layers comprises a glass including at least one oxide selected from the group consisting of silicon (Si) oxide, lithium (Li) oxide, boron (B) oxide, potassium (K) oxide, calcium (Ca) oxide, and, aluminum (Al) oxide. ### Claim 17 (depends on 10) The hybrid inductor of claim 10, wherein the coil part comprises a plurality of coil patterns connected to each other by vias penetrating the layers of the first magnetic metal, the coil patterns being formed on the layers of the first magnetic metal. ### Claim 18 (depends on 12) The hybrid inductor of claim 12, wherein the iron (Fe)-based alloy includes 87 wt % or more of iron (Fe), 4 to 6 wt % of chromium (Cr), and residual silicon, based on a total weight of the iron (Fe)-based alloy. ### Claim 19 (depends on 1) The hybrid inductor of claim 1, wherein the first magnetic metal and the second magnetic metal comprise the same material. ### Claim 20 (depends on 10) The hybrid inductor of claim 10, wherein the first magnetic metal and the second magnetic metal comprise the same material.