# US 10,870,772 B2 · Transparent conductive films with fused networks

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- Number: US 10,870,772 B2
- Document ID: US10870772B2
- Status: Granted
- Kind: B2
- Application number: 16/127,462
- Filed: 2018-09-11
- Published: 2019-01-10
- Granted: 2020-12-22
- Earliest claimed: 2014-07-31
- Assignees: C3Nano Inc.
- Applicants: C3Nano Inc.
- Inventors: Ying-Syi Li; Xiqiang Yang; Yu Kambe; Xiaofeng Chen; Hua Gu; Steven Michael Lam; Melanie Maniko Inouye; Arthur Yung-Chi Cheng; Alex Da Zhang Tan; Christopher Steven Scully; Ajay Virkar
- Web page: https://patentgrep.com/patent/US10870772B2

## CPC

- C09D 11/52: Electrically conductive inks
- B05D 1/005: {Spin coating}
- B05D 1/02: performed by spraying
- B05D 1/18: performed by dipping
- B05D 1/265: {Extrusion coatings}
- B05D 1/28: performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
- B05D 3/0254: {After-treatment}
- B05D 5/06: to obtain multicolour or other optical effects (B05D5/02 takes precedence)
- C09D 5/24: Electrically-conducting paints {(conductive materials H01B1/00)}
- C09D 11/08: based on natural resins
- C09D 11/10: based on artificial resins
- C09D 11/102: containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
- C09D 11/106: containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D 11/14: based on carbohydrates
- C09D 101/02: Cellulose; Modified cellulose
- C09D 139/06: Homopolymers or copolymers of N-vinyl-pyrrolidones
- C23C 30/00: Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence)
- G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer}
- H01B 1/02: mainly consisting of metals or alloys
- H01B 1/22: the conductive material comprising metals or alloys
- H01B 13/30: Drying; Impregnating (H01B13/32 takes precedence)
- H05K 1/0274: {Optical details, e.g. printed circuits comprising integral optical means (H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42)}
- H05K 1/097: {Inks comprising nanoparticles and specially adapted for being sintered at low temperature (H05K1/095 takes precedence)}
- G06F 3/044: by capacitive means
- G06F 3/045: using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- H05K 2201/0108: Transparent
- H05K 2201/026: Nanotubes or nanowires
- H05K 2201/10128: Display
- H05K 2201/10151: Sensor
- 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)
- 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)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

Fusing nanowire inks are described that can also comprise a hydrophilic polymer binder, such as a cellulose based binder. The fusing nanowire inks can be deposited onto a substrate surface and dried to drive the fusing process. Transparent conductive films can be formed with desirable properties.

## Claims

### Claim 1

A transparent conductive film comprising a substrate and a transparent conductive layer, the transparent conductive layer comprising a fused metal nanostructured network and from about 40 wt % to about 600 wt % of a polysaccharide with the weight percent evaluated relative to the metal weight, wherein the film has a sheet resistance of no more than about 100 ohms/sq and a % TT of at least about 89%.

### Claim 2 (depends on 1)

The transparent conductive film of claim 1 wherein the fused metal nanostructured network has a metal loading from about 0.1 mg/m2 to about 300 mg/m2.

### Claim 3 (depends on 1)

The transparent conductive film of claim 1 wherein the fused metal nanostructured network has a metal loading from about 1 mg/m2 to about 150 mg/m2.

### Claim 4 (depends on 1)

The transparent conductive film of claim 1 wherein the transparent conductive layer comprises from about 50 wt % to about 450 wt % polysaccharide relative to metal weight.

### Claim 5 (depends on 1)

The transparent conductive film of claim 1 wherein the polysaccharide comprises a cellulose based polymer.

### Claim 6 (depends on 1)

The transparent conductive film of claim 1 wherein the polysaccharide comprises a chitosan based polymer.

### Claim 7 (depends on 1)

The transparent conductive film of claim 1 having a sheet resistance of no more than about 95 ohms/sq, a % TT of at least about 90%, wherein the metal nanostructured network comprises silver.

### Claim 8 (depends on 7)

The transparent conductive film of claim 7 having a % TT of at least about 92%.

### Claim 9 (depends on 1)

The transparent conductive film of claim 1 having a sheet resistance of no more than about 70 ohms/sq.

### Claim 10 (depends on 1)

The transparent conductive film of claim 1 wherein the substrate comprises a polymer film supporting the transparent conductive layer.

### Claim 11 (depends on 1)

The transparent conductive film of claim 1 wherein the fused metal nanostructured network comprises silver and having haze of no more than about 1.0%.

### Claim 12 (depends on 11)

The transparent conductive film of claim 11 wherein the fused metal nanostructured network further comprises gold or platinum.

### Claim 13 (depends on 1)

The transparent conductive film of claim 1 further comprising a polymer overcoat.

### Claim 14 (depends on 13)

The transparent conductive film of claim 13 wherein the polymer overcoat comprises a UV crosslinked polymer.

### Claim 15 (depends on 13)

The transparent conductive film of claim 13 wherein the polymer overcoat comprises polyurethanes, acrylic resins, acrylic copolymers, polyethers, polyesters, epoxy containing polymers, or mixtures thereof.

### Claim 16 (depends on 13)

The transparent conductive film of claim 13 wherein the polymer overcoat comprises a polysiloxane.

### Claim 17 (depends on 13)

The transparent conductive film of claim 13 wherein the polymer overcoat has a thickness from about 50 nm to about 1 micron.

### Claim 18 (depends on 13)

The transparent conductive film of claim 13 having a sheet resistance of no more than about 70 ohms/sq.

### Claim 19 (depends on 18)

The transparent conductive film of claim 18 having a haze of no more than about 0.8%.

### Claim 20 (depends on 19)

The transparent conductive film of claim 19 having a % TT of at least about 92%.