# US 2013/0154770 A1 · Filter for removing noise and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154770 A1 - Document ID: US20130154770A1 - Status: Published application - Kind: A1 - Application number: 13/714,143 - Filed: 2012-12-13 - Published: 2013-06-20 - Earliest claimed: 2011-12-14 - Assignees: Samsung Electro-Mechanics Co., Ltd. - Inventors: Sang Moon Lee; Sung Kwon Wi; Jeong Bok Kwak; Won Chul Sim; Young Seuck Yoo; Yong Suk Kim - Web page: https://patentgrep.com/patent/US20130154770A1 ## CPC - H03H 7/0138: {Electrical filters or coupling circuits} - H03H 1/0007: {of radio frequency interference filters} - H03H 3/00: Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators - H01F 17/0013: {with stacked layers} - H01F 17/0033: {with the coil helically wound around a magnetic core} - H01F 38/48: {Common mode inductor for reducing or eliminating common mode noise on parallel lines} - H01F 2017/0066: {with a magnetic layer} - H03H 7/427: {Common-mode filters (H02J3/01 and H02M1/126 takes precedence)} - H03H 2001/0085: {Multilayer, e.g. LTCC, HTCC, green sheets} - H03H 2001/0092: {Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter} - Y10T 29/49147: Assembling terminal to base - 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 - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention discloses a filter for removing noise, which includes: a lower magnetic body; an insulating layer disposed on the lower magnetic body and including at least one conductor pattern; input and output stud terminals electrically connected to the conductor pattern for electrical input and output of the conductor pattern; and an upper magnetic body consisting of an inner upper magnetic body including ferrite powder with a size corresponding to the interval between the input and output stud terminals and an outer upper magnetic body including ferrite powder with a size corresponding to the interval between the input and output stud terminals and an outer surface of the lower magnetic body. According to the present invention, it is possible to implement a coil part with high performance and characteristics by increasing permeability and improving impedance characteristics through simple structure and process. ## Claims ### Claim 1 A filter for removing noise, which comprises: a lower magnetic body; an insulating layer disposed on the lower magnetic body and including at least one conductor pattern; input and output stud terminals electrically connected to the conductor pattern for electrical input and output of the conductor pattern; and an upper magnetic body consisting of an inner upper magnetic body including ferrite powder with a size corresponding to the interval between the input and output stud terminals and an outer upper magnetic body including ferrite powder with a size corresponding to the interval between the input and output stud terminals and an outer surface of the lower magnetic body. ### Claim 2 (depends on 1) The filter for removing noise according to claim 1, wherein the ferrite powder has a size corresponding to 30 to 50% of the interval. ### Claim 3 (depends on 1) The filter for removing noise according to claim 1, wherein when the interval between the input and output stud terminals is 220 to 250 μm, the particle size of the ferrite powder included in the inner upper magnetic body within the interval is 50 to 100 μm. ### Claim 4 (depends on 1) The filter for removing noise according to claim 1, wherein when the interval between the input and output stud terminals and the outer surface of the lower magnetic body is 60 μm, the particle size of the ferrite powder included in the outer upper magnetic body within the interval is 20 to 50 μm. ### Claim 5 (depends on 1) The filter for removing noise according to claim 1, wherein when the interval between the input and output stud terminals and the outer surface of the lower magnetic body is 20 μm, the particle size of the ferrite powder included in the outer upper magnetic body within the interval is 1 to 20 μm. ### Claim 6 (depends on 1) The filter for removing noise according to claim 1, wherein the upper magnetic body is provided by being filled through a mask with a hole corresponding to the interval. ### Claim 7 (depends on 6) The filter for removing noise according to claim 6, wherein the upper magnetic body is provided through a deaeration process for removing voids inside, a leveling process for stabilization and curing, and a polishing process for surface polishing after being filled. ### Claim 8 (depends on 1) The filter for removing noise according to claim 1, wherein the upper magnetic powder is made of a resin and a polymer including at least one additive of epoxy and polyimide as well as the ferrite powder. ### Claim 9 (depends on 8) The filter for removing noise according to claim 8, wherein the resin and the additive have a mixing ratio of 9:1 as a weight ratio. ### Claim 10 A method of manufacturing a filter for removing noise, which comprises: preparing a lower magnetic panel on which a noise removal filter unit having at least one conductor pattern and input and output stud terminals for electrical input and output of the conductor pattern is arrayed in plural; providing a plurality of upper magnetic bodies including ferrite powder with different sizes according to the interval between the input and output stud terminals; and dicing the plurality of noise removal filter units into single noise removal filter units. ### Claim 11 (depends on 10) The method of manufacturing a filter for removing noise according to claim 10, wherein the ferrite powder has a size corresponding to 30 to 50% of the interval between the input and output stud terminals. ### Claim 12 (depends on 10) The method of manufacturing a filter for removing noise according to claim 10, wherein the interval between the input stud terminal of the noise removal filter unit and the output stud terminal of the adjacent noise removal filter unit is 40 μm, and the particle size of the ferrite powder included in the upper magnetic body within the interval is 1 to 20 μm. ### Claim 13 (depends on 10) The method of manufacturing a filter for removing noise according to claim 10, wherein the interval between the output stud terminal of the noise removal filter unit and the output stud terminal of the adjacent noise removal filter unit is 120 μm, and the particle size of the ferrite powder included in the upper magnetic body within the interval is 20 to 50 μm. ### Claim 14 (depends on 10) The method of manufacturing a filter for removing noise according to claim 10, wherein the interval between the input stud terminal and the output stud terminal electrically connected to the input stud terminal of each noise removal filter unit is 250 μm, and the particle size of the ferrite powder included in the upper magnetic body within the interval is 50 to 100 μm. ### Claim 15 (depends on 10) The method of manufacturing a filter for removing noise according to claim 10, wherein the conductor pattern is provided in plural to be separated from each other, the interval between the input and output stud terminals of one of the plurality of conductor patterns and the input and output stud terminals of the other of the plurality of conductor patterns is 220 μm, and the particle size of the ferrite powder included in the upper magnetic body within the interval is 50 to 100 μm. ### Claim 16 (depends on 10) The method of manufacturing a filter for removing noise according to claim 10, wherein providing the plurality of upper magnetic bodies is performed by filling a plurality of composite materials including ferrite powder with different sizes through a mask with a hole corresponding to the interval between the input and output stud terminals. ### Claim 17 (depends on 10) The method of manufacturing a filter for removing noise according to claim 10, further comprising a deaeration step for removing voids inside the plurality of upper magnetic bodies, a leveling step for stabilization and curing of the plurality of upper magnetic bodies, and a polishing step for surface polishing of the plurality of upper magnetic bodies, which are sequentially performed after providing the plurality of upper magnetic bodies. ### Claim 18 (depends on 10) The method of manufacturing a filter for removing noise according to claim 10, wherein the plurality of upper magnetic bodies are made of a resin and a polymer including at least one additive of epoxy and polyimide as well as the ferrite powder with different sizes. ### Claim 19 (depends on 18) The method of manufacturing a filter for removing noise according to claim 18, wherein the resin and the additive have a mixing ratio of 9:1 as a weight ratio.