# US 2025/0098433 A1 · Display device including reflection layer 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 2025/0098433 A1 - Document ID: US20250098433A1 - Status: Published application - Kind: A1 - Application number: 18/797,081 - Filed: 2024-08-07 - Published: 2025-03-20 - Earliest claimed: 2023-09-14 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Israel Esteban Lazo Martinez; Sukhoon Kang; Hyungguen Yoon; Sunghwan Hong - Web page: https://patentgrep.com/patent/US20250098433A1 ## CPC - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/1201: {Manufacture or treatment} - H10K 59/80518: {Reflective anodes, e.g. ITO combined with thick metallic layers} - H10K 59/878: {comprising reflective means} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A method of manufacturing a display device includes disposing a material precursor of a bank layer on a substrate, irradiating first ultraviolet rays onto at least a portion of the material precursor to form a first reflection portion, and removing at least a portion of the material precursor to form the bank layer. ## Claims ### Claim 1 A method of manufacturing a display device, the method comprising: disposing a material precursor of a bank layer on a substrate; irradiating first ultraviolet rays onto at least a portion of the material precursor to form a first reflection portion; and removing at least a portion of the material precursor to form the bank layer. ### Claim 2 (depends on 1) The method of claim 1, further comprising: disposing a photomask onto the material precursor before the irradiating the first ultraviolet rays onto the portion of the material precursor, wherein the portion of the material precursor removed includes a portion of the material not irradiated by the first ultraviolet rays. ### Claim 3 (depends on 1) The method of claim 1, wherein the material precursor comprises silver ions (Ag+) and the irradiating of the first ultraviolet rays onto the portion of the material precursor comprises reducing the Ag+ to silver (Ag). ### Claim 4 (depends on 1) The method of claim 1, wherein the material precursor comprises an acryl-based monomer or an epoxy-based monomer, wherein the irradiating of the first ultraviolet rays onto the portion of the material precursor comprises synthesizing the acryl-based monomer or the epoxy-based monomer into a polymer. ### Claim 5 (depends on 1) The method of claim 1, wherein the material comprises at least one of a photoinitiator or a photosensitizer. ### Claim 6 (depends on 1) The method of claim 1, wherein the material precursor comprises silver nitrate (AgNO3) and the irradiating of the first ultraviolet rays onto the portion of the material precursor comprises reducing silver ions (Ag+) of a AgNO3 to silver (Ag). ### Claim 7 (depends on 1) The method of claim 1, further comprising aligning a photomask to the material precursor using infrared rays, wherein a transmittance of the material precursor to the infrared rays is about 14% or higher. ### Claim 8 (depends on 1) The method of claim 1, wherein in the irradiating of the first ultraviolet rays onto the portion of the material precursor, an intensity of the first ultraviolet rays is in a range from about 10 mJ to about 1,500 mJ. ### Claim 9 (depends on 3) The method of claim 3, wherein the irradiating of the first ultraviolet rays onto the portion of the material precursor comprises generating free radicals from a photosensitive material to provide free electrons to the Ag+ of the material precursor. ### Claim 10 (depends on 3) The method of claim 3, wherein, in the irradiating of the first ultraviolet rays onto the portion of the material, Ag atoms aggregate to form Ag colloidal nanoparticles. ### Claim 11 (depends on 1) The method of claim 1, further comprising, after the forming of the bank layer, irradiating second ultraviolet rays onto the bank layer to form a second reflection portion at a side surface of the bank layer. ### Claim 12 (depends on 11) The method of claim 11, further comprising, after the irradiating of the second ultraviolet rays onto the bank layer, curing the bank layer by applying heat to the bank layer. ### Claim 13 (depends on 11) The method of claim 11, wherein a reflection layer is formed of the first reflection portion disposed at an upper surface of the bank layer and the second reflection portion disposed at the side surface of the bank layer, and the reflection layer comprises Ag. ### Claim 14 (depends on 13) The method of claim 13, wherein a transmittance of the reflection layer of the bank layer to visible light is about 70% or higher. ### Claim 15 A method of manufacturing a display device, the method comprising: disposing a material precursor of a bank layer on an encapsulation layer; irradiating first ultraviolet rays onto at least a portion of the material precursor to form a first reflection portion at an upper surface of the material precursor; removing, after forming the first reflection portion, at least a portion of the material precursor disposed above a pixel electrode to form a bank layer; and irradiating second ultraviolet rays onto the bank layer to form a second reflection portion at a side surface of the bank layer. ### Claim 16 (depends on 15) The method of claim 15, further comprising, after the irradiating of the second ultraviolet rays onto the bank layer, curing the bank layer by applying heat. ### Claim 17 (depends on 15) The method of claim 15, wherein the material precursor comprises silver ions (Ag+), and an acryl-based monomer or an epoxy-based monomer, wherein the irradiating of the first ultraviolet rays onto the portion of the material precursor comprises simultaneously synthesizing the acryl-based monomer or the epoxy-based monomer into a polymer and reducing the silver ions (Ag+) to silver (Ag). ### Claim 18 A display device comprising: a substrate; a bank layer disposed above the substrate and comprising a reflection layer formed of silver (Ag) at an upper surface and a side surface of the bank layer, and a central portion comprising Ag ions (Ag+); and a light-transmissive layer, a first-color quantum dot layer, and a second-color quantum dot layer disposed in openings of the bank layer. ### Claim 19 (depends on 18) The display device of claim 18, wherein the bank layer comprises an epoxy-based polymer or an acryl-based polymer. ### Claim 20 (depends on 18) The display device of claim 18, wherein transmittance of the reflection layer of the bank layer to visible light is about 70% or higher.