# US 7,609,434 B2 · Method for manufacturing electrode for electrochromic display > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,434 B2 - Document ID: US7609434B2 - Status: Granted - Kind: B2 - Application number: 11/873,608 - Filed: 2007-10-17 - Published: 2008-12-25 - Granted: 2009-10-27 - Earliest claimed: 2007-06-20 - Assignees: Samsung Electronics Co., Ltd. - Inventors: Hong Shik Shim; In Seo Kee; Ick Hwan Ko; Young Gu Lee - Web page: https://patentgrep.com/patent/US7609434B2 ## CPC - G02F 1/155: Electrodes - G02F 2001/1536: {additional, e.g. protective, layer inside the cell} - Y10T 29/53204: Electrode - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Disclosed is a method for manufacturing an electrode of an electrochromic display. The method includes, prior to forming a porous nanoelectrode, forming a barrier rib for separating an electrolyte using a photosensitive paste as a material for the barrier rib, in which the photosensitive paste enables formation of patterns through a photolithographic process and maintains its shape at 450° C. to 500° C. The use of the electrode enables fabrication of an electrochromic display that is capable of preventing cross-talk between pixels and has advantages of fast response speed, prolonged lifespan upon repeated use and improved electrochromism, when compared to the case of metal oxide electrodes. ## Claims ### Claim 1 A method for manufacturing an electrode of an electrochromic display comprising: forming a wiring electrode on a substrate; forming a barrier rib on the wiring electrode with the use of a photosensitive paste; injecting an electrode-forming paste containing nanoparticles into the barrier rib; sintering the barrier rib and the electrode-forming paste to form a nanoelectrode; and coating an electrochromic material on the nanoparticle surfaces of the nanoelectrode; wherein the photosensitive paste comprises: 20 to 30% by weight of SiO2 or Al2O3 as inorganic particles; 15 to 25% by weight of a mixture of methyl acrylate and isobutyl acrylate as a photosensitive monomer; 25 to 35% by weight of a mixture of methyl acrylate and isobutyl acrylate as a photosensitive polymer; 15 to 25% by weight of a benzophenol-based compound as a photopolymerization initiator and ultraviolet absorber; and 3 to 5% by weight of 2,4,6-trimethylphenol as an additive including a photopolymerization inhibitor and plasticizer. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: sintering the barrier rib at a high temperature, after forming the barrier rib with the photosensitive paste. ### Claim 3 (depends on 1) The method according to claim 1, wherein the barrier rib is formed through a photolithographic process. ### Claim 4 (depends on 1) The method according to claim 1, wherein the photosensitive paste comprises inorganic particles and an organic ingredient containing a photosensitive compound. ### Claim 5 (depends on 1) The method according to claim 1, wherein the photosensitive paste comprises: 26% by weight of SiO2 or Al2O3 as inorganic particles; 20% by weight of a mixture of methyl acrylate and isobutyl acrylate as a photosensitive monomer; 30% by weight of a mixture of methyl acrylate and isobutyl acrylate as a photosensitive polymer; 20% by weight of a benzophenol-based compound as a photopolymerization initiator and ultraviolet absorber; and 4% by weight of 2,4,6-trimethylphenol as an additive including a photopolymerization inhibitor and plasticizer. ### Claim 6 (depends on 1) The method according to claim 1, wherein the glass transition temperature (Tc) and thermal softening temperature (Tg) of the photosensitive paste are in a range from 350 degrees Celsius to 600 degrees Celsius. ### Claim 7 (depends on 1) The method according to claim 1, wherein the photosensitive paste exhibits insulating property after sintering. ### Claim 8 (depends on 1) The method according to claim 1, wherein the paste containing nanoparticles is applied to the barrier rib by printing, solution spin coating or electrophoretic deposition. ### Claim 9 (depends on 1) The method according to claim 1, wherein the electrode has a porous structure. ### Claim 10 (depends on 9) The method according to claim 9, wherein the porous structure is formed by high-temperature sintering. ### Claim 11 (depends on 1) The method according to claim 1, wherein the electrochromic material is selected from the group consisting of polyaniline, polypyrrole, polythiophene, viologen and a derivative thereof. ### Claim 12 (depends on 1) The method according to claim 1, wherein the electrochromic material is coated on the nanoparticle surfaces by dip coating, spray coating or spin coating. ### Claim 13 An electrochromic display comprising: a wiring electrode formed on a substrate; a barrier rib formed on the wiring electrode; a nanoelectrode having nanoparticle surfaces formed on the wiring electrode; and an electrochromic material formed on the nanoparticle surfaces of the nanoelectrode; wherein the electrochromic material is selected from the group consisting of polyaniline, polypyrrole, polythiophene, and derivatives thereof. ### Claim 14 (depends on 13) The electrochromic display of claim 13, wherein the barrier rib comprises a sintered photosensitive paste having an insulating property. ### Claim 15 (depends on 13) The electrochromic display of claim 13, wherein the wiring electrode has a porous structure.