# US 12,224,093 B2 · Multilayer magnetic sheet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,093 B2 - Document ID: US12224093B2 - Status: Granted - Kind: B2 - Application number: 18/295,561 - Filed: 2023-04-04 - Published: 2023-10-12 - Granted: 2025-02-11 - Earliest claimed: 2022-04-08 - Assignees: Proterial, Ltd. - Applicants: Proterial, Ltd. - Inventors: Yasuo Kuriyama; Kouhei Miyano; Yuichi Ogawa - Web page: https://patentgrep.com/patent/US12224093B2 ## CPC - H01F 1/16: in the form of sheets (H01F1/147 takes precedence) - B32B 3/18: characterised by an internal layer formed of separate pieces of material {which are juxtaposed side-by-side (B32B5/02 takes precedence)} - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 15/011: {all layers being formed of iron alloys or steels} - B32B 15/043: {of metal (B32B15/01 takes precedence)} - B32B 15/08: of synthetic resin - B32B 15/082: comprising vinyl resins; comprising acrylic resins - B32B 15/095: comprising polyurethanes - B32B 15/18: comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} - B32B 27/08: of synthetic resin - B32B 27/281: {comprising polyimides} - B32B 27/283: {comprising polysiloxanes} - B32B 27/286: {comprising polysulphones; polysulfides} - B32B 27/288: {comprising polyketones} - B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers} - B32B 27/308: {comprising acrylic (co)polymers} - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 27/34: comprising polyamides - B32B 27/36: comprising polyesters - B32B 27/365: {comprising polycarbonates} - B32B 27/40: comprising polyurethanes - H01F 1/15333: {containing nanocrystallites, e.g. obtained by annealing} - H01F 41/0226: {from amorphous ribbons} - B32B 2307/208: Magnetic, paramagnetic - B32B 2457/00: Electrical equipment - H01F 1/15308: {based on Fe/Ni (H01F1/15325 takes precedence)} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ## Abstract A multilayer magnetic sheet includes at least one first layer in which a plurality of magnetic strips are arranged side by side; at least one second layer in which the plurality of magnetic strips are arranged side by side, a direction of the long side of the at least one second layer intersecting that of the at least one first layer; and at least one third layer in which the plurality of magnetic strips are arranged side by side, a direction of the long side of the at least one third layer being the same as that of the at least one first layer. A position of the long side in the at least one first layer and a position of the long side in the at least one third layer are separated from each other by 0.5 mm or more in a direction in which the short side extends. ## Claims ### Claim 1 A multilayer magnetic sheet comprising: at least one first layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side and each provided with, on one surface thereof, an adhesive layer, are arranged such that the long sides are adjacent to each other to be arranged in a plate shape; at least one second layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side and each provided with, on one surface thereof, an adhesive layer, are arranged such that the long sides are adjacent to each other to be arranged in a plate shape, a direction in which the long side of the at least one second layer extends intersecting a direction in which the long side of the at least one first layer extends; and at least one third layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side and each provided with, on one surface thereof, an adhesive layer, are arranged such that the long sides are adjacent to each other to be arranged in a plate shape, a direction in which the long side of the at least one third layer extends being the same as a direction in which the long side of the at least one first layer extends; wherein a position of the long side in the at least one first layer and a position of the long side in the at least one third layer are separated from each other by 0.5 mm or more in a direction in which the short side extends, the adhesive layer includes a support formed in a band shape and an adhesive provided on a first surface and a second surface of the support, on each of the at least one first layer, the at least one second layer, and the at least one third layer, the supports in the adhesive layers are arranged side by side along a direction in which the plurality of magnetic strips is arranged, and a direction in which each of the supports on the at least one first layer extends intersects a direction in which each of the supports on the at least one second layer extends. ### Claim 2 (depends on 1) The multilayer magnetic sheet according to claim 1, further comprising: at least one fourth layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side and each provided with, on one surface thereof, an adhesive layer, are arranged such that the long sides are adjacent to each other to be in a plate shape, a direction in which the long side of the at least one fourth layer extends being the same as a direction in which the long side of the at least one second layer extends; wherein a position of the long side in the at least one second layer and a position of the long side in the at least one fourth layer are separated from each other by 0.5 mm or more in a direction in which the short side extends. ### Claim 3 (depends on 1) The multilayer magnetic sheet according to claim 1, wherein the multilayer magnetic sheet has a width of 100 mm or more and 1000 mm or less and a length of 100 mm or more and 1000 mm or less. ### Claim 4 (depends on 1) The multilayer magnetic sheet according to claim 1, wherein each of the plurality of magnetic strips is an amorphous alloy strip or a nanocrystalline alloy strip. ### Claim 5 (depends on 1) The multilayer magnetic sheet according to claim 1, wherein each of the plurality of magnetic strips is a nanocrystalline alloy strip and includes a plurality of small pieces. ### Claim 6 (depends on 1) The multilayer magnetic sheet according to claim 1, wherein when a dimension of the adhesive layer in a direction intersecting a longitudinal direction of the adhesive layer is a width A, and a dimension of each of the plurality of magnetic strips in a direction intersecting a longitudinal direction of each of the plurality of magnetic strips is a width B, a relationship of 0.2 mm≤(width A−width B)≤3 mm is satisfied, and the long side of each of the plurality of magnetic strips is adjacent to the adhesive layer. ### Claim 7 (depends on 1) The multilayer magnetic sheet according to claim 1, wherein in a direction in which the magnetic strips are stacked, the adhesive layer and a resin sheet bonded to the adhesive layer, the resin sheet being a film-shaped member formed using resin, are provided on a magnetic strip, of the plurality of magnetic strips, located at a first stacking end or a magnetic strip, of the plurality of magnetic strips, located at a second stacking end on an opposite side of the first stacking end. ### Claim 8 A multilayer magnetic sheet comprising: at least one first layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side are arranged such that the long sides are adjacent to each other to be arranged in a plate shape; at least one second layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side are arranged such that the long sides are adjacent to each other to be arranged in a plate shape, a direction in which the long side of the at least one second layer extends intersecting a direction in which the long side of the at least one first layer extends; and at least one third layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side are arranged such that the long sides are adjacent to each other to be arranged in a plate shape, a direction in which the long side of the at least one third layer extends being the same as a direction in which the long side of the at least one first layer extends, wherein a position of the long side in the at least one first layer and a position of the long side in the at least one third layer are separated from each other by 0.5 mm or more in a direction in which the short side extends, one surface of each of the plurality of magnetic strips is provided with an adhesive layer, the adhesive layer including a support formed in a band shape and an adhesive provided on a first surface and a second surface of the support, and when a dimension of the adhesive layer in a direction intersecting a longitudinal direction of the adhesive layer is a width A, and a dimension of each of the plurality of magnetic strips in a direction intersecting a longitudinal direction of the magnetic strip is a width B, a relationship of 0.2 mm≤(width A−width B)≤3 mm is satisfied, and the long side of each of the plurality of magnetic strips is adjacent to the adhesive layer. ### Claim 9 A multilayer magnetic sheet comprising: at least one first layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side are arranged such that the long sides are adjacent to each other to be arranged in a plate shape; at least one second layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side are arranged such that the long sides are adjacent to each other to be arranged in a plate shape, a direction in which the long side of the at least one second layer extends intersecting a direction in which the long side of the at least one first layer extends; and at least one third layer in which a plurality of magnetic strips each formed in a band shape having a short side and a long side are arranged such that the long sides are adjacent to each other to be arranged in a plate shape, a direction in which the long side of the at least one third layer extends being the same as a direction in which the long side of the at least one first layer extends; wherein a position of the long side in the at least one first layer and a position of the long side in the at least one third layer are separated from each other by 0.5 mm or more in a direction in which the short side extends; in a direction in which the magnetic strips are stacked, an adhesive layer and a resin sheet bonded to the adhesive layer, the resin sheet being a film-shaped member formed using resin, are provided on a magnetic strip, of the plurality of magnetic strips, located at a first stacking end or a magnetic strip, of the plurality of magnetic strips, located at a second stacking end on an opposite side of the first stacking end; and the adhesive layer includes a support formed in a band shape and an adhesive provided on a first surface and a second surface of the support.