# US 2013/0154767 A1 · Filter for removing noise > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154767 A1 - Document ID: US20130154767A1 - Status: Published application - Kind: A1 - Application number: 13/420,538 - Filed: 2012-03-14 - Published: 2013-06-20 - Earliest claimed: 2011-12-19 - Assignees: Samsung Electro-Mechanics Co., Ltd. - Inventors: Yong Suk Kim; Young Ghyu Ahn; Young Seuck Yoo; Jeong Bok Kwak; Sang Moon Lee; Kang Heon Hur; Sung Kwon Wi - Web page: https://patentgrep.com/patent/US20130154767A1 ## CPC - H03H 7/01: Frequency selective two-port networks - H01F 17/0013: {with stacked layers} - H01F 2017/0066: {with a magnetic layer} - H01F 2017/008: {Electric or magnetic shielding of printed inductances} - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract The present invention discloses a filter for removing noise, which includes: a lower magnetic substrate; a coil layer disposed on the lower magnetic substrate and including at least one conductor pattern and an insulating layer covering the conductor pattern; an upper magnetic substrate disposed on the coil layer; and a magnetic permeability enhancing layer disposed on the magnetic substrate with lower magnetic permeability of the lower magnetic substrate and the upper magnetic substrate. According to the present invention, it is possible to implement a filter for removing noise with high performance, characteristics, and reliability by increasing magnetic permeability to improve impedance characteristics and improving an effect of shielding electromagnetic waves such as jamming. ## Claims ### Claim 1 A filter for removing noise, which comprises: a lower magnetic substrate; a coil layer disposed on the lower magnetic substrate and comprising at least one conductor pattern and an insulating layer covering the conductor pattern; an upper magnetic substrate disposed on the coil layer; and a magnetic permeability enhancing layer disposed on the magnetic substrate with lower magnetic permeability of the lower magnetic substrate and the upper magnetic substrate. ### Claim 2 (depends on 1) The filter for removing noise according to claim 1, wherein the magnetic permeability enhancing layer has magnetic permeability higher than that of the magnetic substrate with lower magnetic permeability of the lower magnetic substrate and the upper magnetic substrate. ### Claim 3 (depends on 2) The filter for removing noise according to claim 2, wherein the magnetic permeability enhancing layer has magnetic permeability equal to that of the magnetic substrate with higher magnetic permeability of the lower magnetic substrate and the upper magnetic substrate. ### Claim 4 (depends on 2) The filter for removing noise according to claim 2, wherein the lower magnetic substrate has magnetic permeability of 80 to 150, the upper magnetic substrate has magnetic permeability of 250 to 400, and the magnetic permeability enhancing layer has magnetic permeability of 250 to 400. ### Claim 5 (depends on 1) The filter for removing noise according to claim 1, wherein the upper magnetic substrate is made of Fe, Ni, Cu, and Zn oxides. ### Claim 6 (depends on 5) The filter for removing noise according to claim 5, wherein a composition ratio of the Ni oxide and the Zn oxide is in the range of 1:1 to 1:2.5. ### Claim 7 (depends on 5) The filter for removing noise according to claim 5, wherein the upper magnetic substrate further comprises a resin. ### Claim 8 (depends on 1) The filter for removing noise according to claim 1, wherein the upper magnetic substrate is manufactured by sintering. ### Claim 9 (depends on 1) The filter for removing noise according to claim 1, wherein the magnetic permeability enhancing layer is disposed on the magnetic substrate with lower magnetic permeability of the lower magnetic substrate and the upper magnetic substrate while being disposed on a surface of the magnetic substrate with lower magnetic permeability, which is in contact with the insulating layer, and inside the magnetic substrate with lower magnetic permeability in multiple layers. ### Claim 10 (depends on 1) The filter for removing noise according to claim 1, further comprising: a shielding enhancing layer surrounding a laminate comprising the lower magnetic substrate, the coil layer, the upper magnetic layer, and the magnetic permeability enhancing layer. ### Claim 11 (depends on 10) The filter for removing noise according to claim 10, wherein the shielding enhancing layer is made of Fe, Ni, Cu, and Zn oxides. ### Claim 12 (depends on 10) The filter for removing noise according to claim 10, wherein the shielding enhancing layer is made of Ag, Fe, Cu, Zn, and Ni metals. ### Claim 13 (depends on 10) The filter for removing noise according to claim 10, wherein the shielding enhancing layer comprises an inner layer made of an oxide and an outer layer made of a metal. ### Claim 14 (depends on 10) The filter for removing noise according to claim 10, wherein the shielding enhancing layer is coated through one thin-film process of chemical vapor deposition (CVD), sputtering, and electron (E)-beam. ### Claim 15 (depends on 10) The filter for removing noise according to claim 10, wherein the shielding enhancing layer is coated through a sol-gel or spray method. ### Claim 16 (depends on 10) The filter for removing noise according to claim 10, wherein the shielding enhancing layer is formed with a thickness of 3 to 50 μm. ### Claim 17 (depends on 16) The filter for removing noise according to claim 16, wherein the shielding enhancing layer is formed with a thickness of 5 to 10 μm.