# US 12,222,575 B2 · Intermittently connected optical fiber ribbon > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,222,575 B2 - Document ID: US12222575B2 - Status: Granted - Kind: B2 - Application number: 18/397,026 - Filed: 2023-12-27 - Published: 2024-04-25 - Granted: 2025-02-11 - Earliest claimed: 2019-08-21 - Assignees: Fujikura Ltd. - Applicants: Fujikura Ltd. - Inventors: Yoshie Murakoshi; Akira Namazue; Ken Osato - Web page: https://patentgrep.com/patent/US12222575B2 ## CPC - G02B 6/448: {Ribbon cables} - G02B 6/4403: {with ribbon structure (G02B6/4429, G02B6/4439, G02B6/4479 take precedence)} - G02B 6/4404: {Multi-podded} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract An optical fiber ribbon includes: optical fibers disposed side by side in a predetermined direction; and connecting portions that connect two adjacent ones of the optical fibers. A peripheral resin portion is formed on a periphery of the optical fibers. An arithmetic mean roughness Ra of a surface of the peripheral resin portion is 0.41 μm or lower. A ten-point mean roughness Rz of a surface of the peripheral resin portion is 1.4 μm or lower. ## Claims ### Claim 1 An optical fiber ribbon, comprising: optical fibers disposed side by side in a predetermined direction; and connecting portions that connect two adjacent ones of the optical fibers, wherein a peripheral resin portion is formed on a periphery of the optical fibers, an arithmetic mean roughness Ra of a surface of the peripheral resin portion is 0.41 μm or lower, a ten-point mean roughness Rz of a surface of the peripheral resin portion is 1.4 μm or lower, and the arithmetic mean roughness Ra of the peripheral resin portion is 0.41 μm or lower and the ten-point mean roughness Rz is 1.4 μm or lower when the connecting portions of the optical fiber ribbon are broken to separate the optical fibers and thereafter the surface of the peripheral resin portion is measured along a longitudinal direction of the optical fibers so as to prevent the broken portions of the connecting portions from being measured portions. ### Claim 2 (depends on 1) The optical fiber ribbon according to claim 1, wherein a maximum height Ry of a surface of the peripheral resin portion is 2.0 μm or lower. ### Claim 3 (depends on 1) The optical fiber ribbon according to claim 1, wherein a root mean square height Rq of a surface of the peripheral resin portion is 0.42 μm or lower. ### Claim 4 (depends on 1) The optical fiber ribbon according to claim 1, wherein the peripheral resin portion is formed of resin forming the connecting portions. ### Claim 5 (depends on 4) The optical fiber ribbon according to claim 4, wherein a silicone compound is added to the resin. ### Claim 6 (depends on 1) The optical fiber ribbon according to claim 1, wherein the connecting portions intermittently connect two adjacent ones of the optical fibers. ### Claim 7 (depends on 1) The optical fiber ribbon according to claim 1, wherein the arithmetic mean roughness Ra of the peripheral resin portion is 0.41 μm or lower and the ten-point mean roughness Rz is 1.4 μm or lower when a range with a length of 10 mm in a longitudinal direction on the surface of the peripheral resin portion is measured. ### Claim 8 (depends on 1) The optical fiber ribbon according to claim 1, wherein the peripheral resin portion is formed on an entire periphery of the optical fibers in an entire area of the optical fibers in a longitudinal direction, and the arithmetic mean roughness Ra of the peripheral resin portion is 0.41 μm or lower and the ten-point mean roughness Rz is 1.4 μm or lower. ### Claim 9 (depends on 1) The optical fiber ribbon according to claim 1, wherein the peripheral resin portion is formed on a part of a periphery of the optical fibers in a part of a longitudinal direction, and the arithmetic mean roughness Ra of the peripheral resin portion is 0.41 μm or lower and the ten-point mean roughness Rz is 1.4 μm or lower. ### Claim 10 An optical fiber ribbon, comprising: optical fibers disposed side by side in a predetermined direction; and connecting portions that connect two adjacent ones of the optical fibers, wherein a peripheral resin portion is formed on a periphery of the optical fibers, an arithmetic mean roughness Ra of a surface of the peripheral resin portion is 0.41 μm or lower, a ten-point mean roughness Rz of a surface of the peripheral resin portion is 1.4 μm or lower, the arithmetic mean roughness Ra of the peripheral resin portion based on components that are extracted by removing components of a circular periphery shape of the optical fibers from a measurement result of measuring of the surface of the peripheral resin portion along a ribbon width direction is 0.41 μm or lower, and the ten-point mean roughness Rz of the peripheral resin portion based on components that are extracted by removing components of a circular periphery shape of the optical fibers from a measurement result of measuring of the surface of the peripheral resin portion along a ribbon width direction is 1.4 μm or lower. ### Claim 11 (depends on 10) The optical fiber ribbon according to claim 10, wherein a maximum height Ry of a surface of the peripheral resin portion is 2.0 μm or lower. ### Claim 12 (depends on 10) The optical fiber ribbon according to claim 10, wherein a root mean square height Rq of a surface of the peripheral resin portion is 0.42 μm or lower. ### Claim 13 (depends on 10) The optical fiber ribbon according to claim 10, wherein the peripheral resin portion is formed of resin forming the connecting portions. ### Claim 14 (depends on 13) The optical fiber ribbon according to claim 13, wherein a silicone compound is added to the resin. ### Claim 15 (depends on 10) The optical fiber ribbon according to claim 10, wherein the connecting portions intermittently connect two adjacent ones of the optical fibers. ### Claim 16 (depends on 10) The optical fiber ribbon according to claim 10, wherein the arithmetic mean roughness Ra of the peripheral resin portion is 0.41 μm or lower and the ten-point mean roughness Rz is 1.4 μm or lower when a range with a length of 10 mm in a longitudinal direction on the surface of the peripheral resin portion is measured. ### Claim 17 (depends on 10) The optical fiber ribbon according to claim 10, wherein the peripheral resin portion is formed on an entire periphery of the optical fibers in an entire area of the optical fibers in a longitudinal direction, and the arithmetic mean roughness Ra of the peripheral resin portion is 0.41 μm or lower and the ten-point mean roughness Rz is 1.4 μm or lower. ### Claim 18 (depends on 10) The optical fiber ribbon according to claim 10, wherein the peripheral resin portion is formed on a part of a periphery of the optical fibers in a part of a longitudinal direction, and the arithmetic mean roughness Ra of the peripheral resin portion is 0.41 μm or lower and the ten-point mean roughness Rz is 1.4 μm or lower.