# US 11,896,997 B2 · Window and method for 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 11,896,997 B2 - Document ID: US11896997B2 - Status: Granted - Kind: B2 - Application number: 17/533,811 - Filed: 2021-11-23 - Published: 2022-09-29 - Granted: 2024-02-13 - Earliest claimed: 2021-03-26 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hyunseung Seo; Jihyun Ko - Web page: https://patentgrep.com/patent/US11896997B2 ## CPC - B05D 5/00: Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures - C23C 14/042: {using masks} - B05D 1/32: using means for protecting parts of a surface not to be coated, e.g. using stencils, resists - B05D 7/54: {No clear coat specified} - C03C 17/3411: {with at least two coatings of inorganic materials (C03C17/36, C03C17/42 take precedence)} - C03C 17/3435: {comprising a nitride, oxynitride, boronitride or carbonitride} - B05D 2201/02: Polymeric substrate - B05D 2203/35: Glass - B05D 2601/22: Silica - C03C 2217/213: SiO2 - C03C 2217/214: Al2O3 - C03C 2217/281: Nitrides - C03C 2217/73: Anti-reflective coatings with specific characteristics - C03C 2217/734: comprising an alternation of high and low refractive indexes - C03C 2218/34: Masking - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS ## Abstract A window includes a base substrate including a planar portion and a curved portion surrounding at least a part of the planar portion, a front cover layer disposed on the base substrate, a flat cover layer overlapping the planar portion and disposed on the base substrate, and a bending cover layer overlapping the curved portion and disposed on the base substrate. The front cover layer and the bending cover layer each include an inorganic material. ## Claims ### Claim 1 A window comprising: a base substrate including: a planar portion substantially parallel to a plane defined by a first direction and a second direction intersecting the first direction; and a curved portion extending from the planar portion in at least one of the first and second directions in a plan view and surrounding at least a part of the planar portion in a plan view; a front cover layer disposed on the base substrate; a flat cover layer overlapping the planar portion and disposed on the base substrate; and a bending cover layer overlapping the curved portion and disposed on the base substrate and not overlapping the planar portion, wherein the front cover layer and the bending cover layer each include an inorganic material. ### Claim 2 (depends on 1) The window of claim 1, wherein the front cover layer is disposed between the base substrate and the flat cover layer and between the base substrate and the bending cover layer. ### Claim 3 (depends on 2) The window of claim 2, further comprising: an anti-reflection layer disposed between the base substrate and the front cover layer. ### Claim 4 (depends on 2) The window of claim 2, further comprising: a functional layer disposed on the flat cover layer and the bending cover layer, wherein the functional layer includes at least one of an anti-fingerprint layer and an antistatic layer. ### Claim 5 (depends on 2) The window of claim 2, further comprising: a lower cover layer overlapping the curved portion and disposed below the base substrate, wherein the lower cover layer includes an inorganic material. ### Claim 6 (depends on 5) The window of claim 5, further comprising: a coating layer disposed below the planar portion and the lower cover layer. ### Claim 7 (depends on 1) The window of claim 1, wherein the front cover layer is disposed on the flat cover layer and the bending cover layer. ### Claim 8 (depends on 7) The window of claim 7, further comprising: an anti-reflection layer disposed between the base substrate and the flat cover layer and between the base substrate and the bending cover layer. ### Claim 9 (depends on 7) The window of claim 7, further comprising: a functional layer disposed on the front cover layer, wherein the functional layer includes at least one of an anti-fingerprint layer and an antistatic layer. ### Claim 10 (depends on 7) The window of claim 7, further comprising: a lower cover layer overlapping the curved portion and disposed below the base substrate, wherein the lower cover layer includes an inorganic material. ### Claim 11 (depends on 1) The window of claim 1, wherein the flat cover layer includes layers having different refractive indices, and the layers of the flat cover layer are alternately disposed. ### Claim 12 (depends on 1) The window of claim 1, wherein a sum of a hardness of the front cover layer and a hardness of the bending cover layer is about 8 GPa or more. ### Claim 13 (depends on 1) The window of claim 1, wherein each of the front cover layer, the flat cover layer, and the bending cover layer has a thickness in a range of about 500 nm and about 5000 nm. ### Claim 14 (depends on 1) The window of claim 1, wherein the base substrate comprises a boundary surface between the planar portion and the curved portion and a side surface, and an angle between the boundary surface and the side surface is about 90 degrees or less. ### Claim 15 (depends on 1) The window of claim 1, wherein a thickness of the curved portion varies as a distance from the planar portion varies. ### Claim 16 (depends on 1) The window of claim 1, wherein the inorganic material includes one of silicon nitride, silicon oxide, and aluminum oxide. ### Claim 17 A method of manufacturing a window, the method comprising: providing a base substrate including a planar portion and a curved portion which surrounds at least a part of the planar portion; forming a front cover layer covering the planar portion and the curved portion; forming a flat cover layer on the front cover layer using a first mask including a first opening that overlaps the planar portion, the flat cover layer overlapping the planar portion; and forming a bending cover layer on the front cover layer using a second mask including a second opening that overlaps at least a part of the curved portion, the bending cover layer overlapping the curved portion. ### Claim 18 (depends on 17) The method of claim 17, wherein the front cover layer and the bending cover layer each include an inorganic material, and a hardness of the curved portion is greater than a hardness of the planar portion. ### Claim 19 (depends on 18) The method of claim 18, wherein the forming of the flat cover layer includes: forming layers having different refractive indices; and disposing the layers of the flat layer alternately with each other. ### Claim 20 (depends on 17) The method of claim 17, wherein a sum of a hardness of the front cover layer and a hardness of the bending cover layer is about 8 GPa or more. ### Claim 21 (depends on 1) The window of claim 1, wherein: the flat cover layer does not overlap the curved portion. ### Claim 22 (depends on 1) The window of claim 1, wherein: the bending cover layer comprises a first material; and the first cover layer comprises a second material different from the first material. ### Claim 23 (depends on 1) The window of claim 1, wherein: the curved portion comprises: a first portion and a second portion, each extending in the first direction from the planar portion and spaced apart from each other in the first direction with the planar portion interposed therebetween; and a third portion and a fourth portion, each extending in the second direction from the planar portion and spaced apart from each other in the second direction with the planar portion interposed therebetween, and the first to fourth portions extend continuously.