# US 10,870,260 B2 · Film touch sensor and method for fabricating the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,870,260 B2
- Document ID: US10870260B2
- Status: Granted
- Kind: B2
- Application number: 16/068,313
- Filed: 2017-01-06
- Published: 2019-01-24
- Granted: 2020-12-22
- Earliest claimed: 2016-01-08
- Assignees: Dongwoo Fine-Chem Co., Ltd.
- Applicants: Dongwoo Fine-Chem Co., Ltd.
- Inventors: Sang Kook Kim; Seong Hwan Park; Seung June Park; Sung Hoon Cho
- Web page: https://patentgrep.com/patent/US10870260B2

## CPC

- B32B 7/06: permitting easy separation
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/08: of synthetic resin
- B32B 23/08: of synthetic resin
- B32B 27/08: of synthetic resin
- B32B 27/28: comprising synthetic resins not wholly covered by any one of the sub-groups {B32B27/30 - B32B27/42}
- B32B 27/281: {comprising polyimides}
- B32B 27/285: {comprising polyethers}
- B32B 27/286: {comprising polysulphones; polysulfides}
- B32B 27/288: {comprising polyketones}
- B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/325: {comprising polycycloolefins}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- B32B 27/42: comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
- C08F 232/08: having condensed rings (coumarone-indene polymers C08F244/00)
- C09D 145/00: Coating compositions based on homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic system; Coating compositions based on derivatives of such polymers (based on polymers of cyclic esters of polyfunctional acids C09D131/00; based on polymers of cyclic anhydrides or imides C09D135/00)
- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- B32B 27/30: comprising vinyl {(co)polymers; comprising acrylic (co)polymers}
- B32B 2250/03: 3 layers
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/20: Inorganic coating
- B32B 2255/205: Metallic coating
- B32B 2255/24: Organic non-macromolecular coating
- B32B 2255/26: Polymeric coating
- B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers
- B32B 2307/306: Resistant to heat
- B32B 2307/412: Transparent
- B32B 2307/418: Refractive
- B32B 2307/42: Polarizing, birefringent, filtering
- B32B 2307/51: Elastic
- B32B 2307/546: Flexural strength; Flexion stiffness
- B32B 2307/708: Isotropic
- B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion
- B32B 2307/732: Dimensional properties
- B32B 2307/748: Releasability
- B32B 2457/00: Electrical equipment
- B32B 2457/202: LCD, i.e. liquid crystal displays
- B32B 2457/204: Plasma displays
- C08F 222/404: {substituted imides comprising oxygen other than the carboxy oxygen}
- G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- G06F 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A film touch sensor includes a separation layer, a protective layer which is disposed on the separation layer and is a cured layer of a polymer having a repeating unit represented by Formula 1 or 2, and an electrode pattern layer disposed on the protective layer, such that it is possible to suppress thermal damage such as wrinkles, or cracks of an protective layer, which may occur in high-temperature deposition and annealing processes, and significantly reduce an occurrence rate of cracks during peeling-off the same from a carrier substrate.

## Claims

### Claim 1

A film touch sensor comprising:
a separation layer;
a protective layer which is disposed on the separation layer and is a cured layer of a polymer having a repeating unit represented by Formula 1 or 2 below; and
an electrode pattern layer disposed on the protective layer:
wherein at least one of R1 to R4 is —Xn—Y1, n is 0 or 1, X is an alkylene group or a carbonyl group having 1 to 6 carbon atoms, Y1 is a protonic polar group, the others of R1 to R4 is hydrogen or —Xn—Y2, Y2 is an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, or a protonic polar group, wherein the Y2 may be substituted with an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 12 carbon atoms, and m is an integer of 0 to 2; and
wherein R5 and R6 are connected with each other to form a 3-membered or 5-membered hetero ring which may be substituted with an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 12 carbon atoms, and k is an integer of 0 to 2.

### Claim 2 (depends on 1)

The film touch sensor according to claim 1, wherein the polymer has a glass transition temperature of 100° C. or higher.

### Claim 3 (depends on 1)

The film touch sensor according to claim 1, wherein the protective layer has an elastic modulus of 2.8 to 4.5 GPa.

### Claim 4 (depends on 1)

The film touch sensor according to claim 1, wherein the protective layer has a transmittance of 90% or more.

### Claim 5 (depends on 1)

The film touch sensor according to claim 1, further comprising a base film attached to an upper side of the electrode pattern layer.

### Claim 6 (depends on 1)

An image display device comprising the film touch sensor according to claim 1.

### Claim 7

A method for fabricating a film touch sensor, the method comprising:
forming a separation layer on a carrier substrate;
applying a protective layer forming composition which contains a polymer having a repeating unit represented by Formula 1 or 2 below on the separation layer and curing the same to form a protective layer thereon;
forming an electrode pattern layer on the protective layer; and
peeling-off the separation layer from the carrier substrate:
wherein at least one of R1 to R4 is —Xn—Y1, n is 0 or 1, X is an alkylene group or a carbonyl group having 1 to 6 carbon atoms, Y1 is a protonic polar group, the others of R1 to R4 is hydrogen or —Xn—Y2, Y2 is an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, or a protonic polar group, wherein the Y2 may be substituted with an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 12 carbon atoms, and m is an integer of 0 to 2; and
wherein R5 and R6 are connected with each other to form a 3-membered or 5-membered hetero ring which may be substituted with an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 12 carbon atoms, and k is an integer of 0 to 2.

### Claim 8 (depends on 7)

The method for fabricating a film touch sensor according to claim 7, wherein the curing of the protective layer forming composition is performed including pre-bake and post-bake.

### Claim 9 (depends on 8)

The method for fabricating a film touch sensor according to claim 8, wherein the post-bake is performed at 180° C. to 250° C. for 20 minutes to 50 minutes.