# US 8,541,150 B2 · Manufacturing method of polymer film with photonic crystal structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,150 B2 - Document ID: US8541150B2 - Status: Granted - Kind: B2 - Application number: 13/049,281 - Filed: 2011-03-16 - Published: 2012-03-01 - Granted: 2013-09-24 - Earliest claimed: 2010-08-25 - Assignees: National Cheng Kung University - Applicants: Jui-Hsiang Liu - Inventors: Jui-Hsiang Liu - Web page: https://patentgrep.com/patent/US8541150B2 ## CPC - C09K 19/586: {Optically active dopants; chiral dopants} - C09K 19/12: at least two benzene rings directly linked, e.g. biphenyls - C09K 2019/0448: {the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate} - C09K 2219/03: in the form of films, e.g. films after polymerisation of LC precursor - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A manufacturing method of a polymer film with the photonic crystal structure includes a mixing step for at least mixing an achiral liquid crystal (LC), a chiral dopant, a monomer and a photo initiator together to form an LC-monomer mixture, at least one exposure step for exposing the LC-monomer mixture through a mask, at least one diffusion step for diffusing the monomer from the area around one of the exposure areas to the exposure area, and a LC removing step for removing the achiral LC to form the polymer film. By implementing the diffusion step after the exposure step, the polymerization rate of the monomers is enhanced so as to increase the proportion of the polymer in the polymer film and raise the imprint rate of chirality. Therefore, the polymer film can reveal stronger photonic crystal structure and property of Bragg reflection when it is not filled with any fluid. ## Claims ### Claim 1 A manufacturing method of a polymer film with photonic crystal structure, comprising steps of: a mixing step for at least mixing an achiral liquid crystal (LC), a chiral dopant, a monomer and a photo initiator together to form an LC-monomer mixture, wherein the LC-monomer mixture is filled in a light-permeable container; at least one exposure step for exposing the LC-monomer mixture through a mask; at least one diffusion step for diffusing the monomer from an area around one of exposure areas to the exposure area; and a LC removing step for removing the achiral LC to form the polymer film. ### Claim 2 (depends on 1) The manufacturing method according to claim 1, further comprising a step of: repeating the exposure step and the diffusion step. ### Claim 3 (depends on 1) The manufacturing method according to claim 1, wherein at least two of the exposure areas of the LC-monomer mixture have different exposure times, exposure intensities, exposure periods, or diffusion periods. ### Claim 4 (depends on 1) The manufacturing method according to claim 1, wherein an inner side of the light-permeable container is processed by a homogeneous parallel alignment process. ### Claim 5 (depends on 1) The manufacturing method according to claim 1, when a plurality of polymer films are formed, further comprising a step of: stacking the polymer films. ### Claim 6 (depends on 1) The manufacturing method according to claim 1, further comprising: a filling step for filling a fluid in the polymer film. ### Claim 7 (depends on 6) The manufacturing method according to claim 6, wherein the fluid is a gas or a liquid, and the liquid is an isotropic liquid or an anisotropic liquid. ### Claim 8 (depends on 6) The manufacturing method according to claim 6, further comprising a step of: attaching a transparent conductive film on one side of the polymer film. ### Claim 9 A manufacturing method of a polymer film with photonic crystal structure, comprising steps of: a mixing step for at least mixing a chiral liquid crystal (LC), a monomer and a photo initiator together to form an LC-monomer mixture, wherein the LC-monomer mixture is filled in a light-permeable container; at least one exposure step for exposing the LC-monomer mixture through a mask; at least one diffusion step for diffusing the monomer from an area around one of exposure areas to the exposure area; and a LC removing step for removing the chiral LC to form the polymer film. ### Claim 10 (depends on 9) The manufacturing method according to claim 9, further comprising a step of: repeating the exposure step and the diffusion step. ### Claim 11 (depends on 9) The manufacturing method according to claim 9, wherein at least two of the exposure areas of the LC-monomer mixture have different exposure times, exposure intensities, exposure periods, or diffusion periods. ### Claim 12 (depends on 9) The manufacturing method according to claim 9, wherein an inner side of the light-permeable container is processed by a homogeneous parallel alignment process. ### Claim 13 (depends on 9) The manufacturing method according to claim 9, when a plurality of polymer films are formed, further comprising a step of: stacking the polymer films. ### Claim 14 (depends on 9) The manufacturing method according to claim 9, further comprising: a filling step for filling a fluid in the polymer film. ### Claim 15 (depends on 14) The manufacturing method according to claim 14, wherein the fluid is a gas or a liquid, and the liquid is an isotropic liquid or an anisotropic liquid. ### Claim 16 (depends on 14) The manufacturing method according to claim 14, further comprising a step of: attaching a transparent conductive film on one side of the polymer film. ### Claim 17 A manufacturing method of a polymer film with photonic crystal structure, comprising steps of: a mixing step for at least mixing an achiral liquid crystal (LC), a chiral dopant, a monomer and a photo initiator together to form an LC-monomer mixture, wherein the LC-monomer mixture is filled in a light-permeable container; at least one exposure step for exposing at least one exposure area of the LC-monomer mixture by a laser; at least one diffusion step for diffusing the monomer from an area around one of the exposure areas to the exposure area; and a LC removing step for removing the achiral LC to form the polymer film. ### Claim 18 (depends on 17) The manufacturing method according to claim 17, further comprising a step of: repeating the exposure step and the diffusion step. ### Claim 19 (depends on 17) The manufacturing method according to claim 17, wherein at least two of the exposure areas of the LC-monomer mixture have different exposure times, exposure intensities, exposure periods, or diffusion periods. ### Claim 20 (depends on 17) The manufacturing method according to claim 17, wherein an inner side of the light-permeable container is processed by a homogeneous parallel alignment process. ### Claim 21 (depends on 17) The manufacturing method according to claim 17, when a plurality of polymer films are formed, further comprising a step of: stacking the polymer films. ### Claim 22 (depends on 17) The manufacturing method according to claim 17, further comprising: a filling step for filling a fluid in the polymer film. ### Claim 23 (depends on 22) The manufacturing method according to claim 22, wherein the fluid is a gas or a liquid, and the liquid is an isotropic liquid or an anisotropic liquid. ### Claim 24 (depends on 22) The manufacturing method according to claim 22, further comprising a step of: attaching a transparent conductive film on one side of the polymer film. ### Claim 25 A manufacturing method of a polymer film with photonic crystal structure, comprising steps of: a mixing step for at least mixing a chiral liquid crystal (LC), a monomer and a photo initiator together to form an LC-monomer mixture, wherein the LC-monomer mixture is filled in a light-permeable container; at least one exposure step for exposing at least one exposure area of the LC-monomer mixture by a laser; at least one diffusion step for diffusing the monomer from an area around one of the exposure areas to the exposure area; and a LC removing step for removing the chiral LC to form the polymer film. ### Claim 26 (depends on 25) The manufacturing method according to claim 25, further comprising a step of: repeating the exposure step and the diffusion step. ### Claim 27 (depends on 25) The manufacturing method according to claim 25, wherein at least two of the exposure areas of the LC-monomer mixture have different exposure times, exposure intensities, exposure periods, or diffusion periods. ### Claim 28 (depends on 25) The manufacturing method according to claim 25, wherein an inner side of the light-permeable container is processed by a homogeneous parallel alignment process. ### Claim 29 (depends on 25) The manufacturing method according to claim 25, when a plurality of polymer films are formed, further comprising a step of: stacking the polymer films. ### Claim 30 (depends on 25) The manufacturing method according to claim 25, further comprising: a filling step for filling a fluid in the polymer film. ### Claim 31 (depends on 30) The manufacturing method according to claim 30, wherein the fluid is a gas or a liquid, and the liquid is an isotropic liquid or an anisotropic liquid. ### Claim 32 (depends on 30) The manufacturing method according to claim 30, further comprising a step of: attaching a transparent conductive film on one side of the polymer film.