# US 10,372,246 B2 · Transferable nanocomposites for touch sensors

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- Number: US 10,372,246 B2
- Document ID: US10372246B2
- Status: Granted
- Kind: B2
- Application number: 15/208,596
- Filed: 2016-07-12
- Published: 2017-01-19
- Granted: 2019-08-06
- Earliest claimed: 2015-07-16
- Applicants: Hailiang Wang
- Inventors: Hailiang Wang
- Web page: https://patentgrep.com/patent/US10372246B2

## CPC

- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- C09D 5/24: Electrically-conducting paints {(conductive materials H01B1/00)}
- C09D 137/00: Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a heterocyclic ring containing oxygen (based on polymers of cyclic esters of polyfunctional acids C09D131/00; based on polymers of cyclic anhydrides of unsaturated acids C09D135/00); Coating compositions based on derivatives of such polymers
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- G06F 2203/04112: Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- 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)

## Abstract

This disclosure generally relates to a transferable electrically conductive nanocomposite and a method for manufacturing it. This disclosure also relates to a high throughput process suitable for manufacturing of transparent electrically conductive nanocomposite layers formed on both flexible and rigid substrates. This disclosure also generally relates to an electronic system comprising a transparent conductive electrode. This disclosure also generally relates to an electronic system comprising a touch sensor and a method for manufacturing such system. This disclosure also generally relates to an optoelectronic system including a touch screen.

## Claims

### Claim 1

A transferable electrically conductive nanocomposite comprising:
an electrically conductive nanocomposite layer; and
a protective film;
wherein the electrically conductive nanocomposite layer, and the protective film each have a front surface and a back surface;
wherein the front surface of the electrically conductive nanocomposite layer faces the back surface of the protective film;
wherein the electrically conductive nanocomposite layer comprises an electrically conductive nanomaterial and a polymer; and
wherein concentration of the electrically conductive nanomaterial at or around the front surface of the electrically conductive nanocomposite layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the electrically conductive nanocomposite layer.

### Claim 2 (depends on 1)

The transferable electrically conductive nanocomposite of claim 1, further comprising a release film;
wherein the release film has a front surface and a back surface;
wherein the back surface of the electrically conductive nanocomposite layer faces the release film;
wherein the release film adheres to the back surface of the electrically conductive nanocomposite layer and the protective film adheres to the front surface of the electrically conductive nanocomposite layer; and
wherein force of adhesion between the protective film and the front surface of the electrically conductive nanocomposite layer is higher than force of adhesion between the release film and the back surface of the electrically conductive nanocomposite layer.

### Claim 3 (depends on 1)

The transferable electrically conductive nanocomposite of claim 1, further comprising a release film;
wherein the release film has a front surface and a back surface;
wherein the back surface of the electrically conductive nanocomposite layer faces the release film;
wherein the release film adheres to the back surface of the electrically conductive nanocomposite layer and the protective film adheres to the front surface of the electrically conductive nanocomposite layer; and
wherein force of adhesion between the electrically conductive nanocomposite layer and the release film, and force of adhesion between the electrically conductive nanocomposite layer and the protective film are configured such that when the release film is peeled off from the back surface of the electrically conductive nanocomposite layer, the protective film remains adhered to the front surface of the electrically conductive nanocomposite layer.

### Claim 4 (depends on 1)

The transferable electrically conductive nanocomposite of claim 1,
wherein the electrically conductive nanomaterial comprises a nanowire, a nanoribbon, a nanotube, a nanoparticle, or any combination thereof; and
wherein the polymer of the electrically conductive nanocomposite layer comprises a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 5 (depends on 1)

The transferable electrically conductive nanocomposite of claim 1,
wherein the electrically conductive nanomaterial comprises a silver nanowire, a copper nanowire, a gold nanowire, a stainless steel nanowire, or any combination thereof; and
wherein the polymer of the electrically conductive nanocomposite layer comprises a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 6 (depends on 1)

The transferable electrically conductive nanocomposite of claim 1, wherein the protective film and/or the release film comprises poly(ethylene terephthalate) (PET), poly(methyl methacrylate) (PMMA), polycarbonate (PC), poly(ethylene naphthalate) (PEN), cellulose triacetate (TAC), polyimide (PI), or any combination thereof.

### Claim 7

A transparent conductive electrode comprising:
an electrically conductive nanocomposite layer;
a lamination layer; and
a transparent substrate;
wherein the electrically conductive nanocomposite layer, the lamination layer, and the transparent substrate each have a front surface and a back surface;
wherein the front surface of the lamination layer faces the back surface of the electrically conductive nanocomposite layer;
wherein the front surface of the transparent substrate faces the back surface of the lamination layer;
wherein the lamination layer is between the electrically conductive nanocomposite layer and the transparent substrate;
wherein the electrically conductive nanocomposite layer comprises an electrically conductive nanomaterial and a polymer; and
wherein concentration of the electrically conductive nanomaterial at or around the front surface of the electrically conductive nanocomposite layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the electrically conductive nanocomposite layer.

### Claim 8 (depends on 7)

The transparent conductive electrode of claim 7, further comprising a protective film; wherein the protective film has a front surface and a back surface; and wherein the back surface of the protective film faces the front surface of the electrically conductive nanocomposite layer.

### Claim 9 (depends on 8)

The transparent conductive electrode of claim 8,
wherein the protective film comprises PET, PMMA, PC, PEN, TAC, PI, or any combination thereof;
wherein the transparent substrate comprises PMMA, PC, a glass, or any combination thereof; and
wherein the lamination layer comprises a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 10 (depends on 7)

The transparent conductive electrode of claim 7,
wherein the electrically conductive nanomaterial comprises a nanowire, a nanoribbon, a nanotube, a nanoparticle, or any combination thereof; and
wherein the polymer of the electrically conductive nanocomposite layer comprises a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 11 (depends on 7)

The transparent conductive electrode of claim 7,
wherein the electrically conductive nanomaterial comprises a silver nanowire, a copper nanowire, a gold nanowire, a stainless steel nanowire, or any combination thereof; and
wherein the polymer of the electrically conductive nanocomposite layer comprises a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 12 (depends on 7, 8)

The transparent conductive electrode of claim 7, further comprising:
a second electrically conductive nanocomposite layer; and
a second lamination layer; and
wherein the electrically conductive nanocomposite layer of claim 8 is a first electrically conductive nanocomposite layer;
wherein the lamination layer of claim 8 is a first lamination layer;
wherein the second lamination layer and the second electrically conductive nanocomposite layer each have a front surface and a back surface;
wherein the front surface of the second lamination layer faces the back surface of the transparent substrate;
wherein the back surface of the second electrically conductive nanocomposite layer faces the back surface of the second lamination layer;
wherein the second lamination layer is between the transparent substrate and the second conductive nanocomposite layer; and
wherein the second electrically conductive nanocomposite layer comprises an electrically conductive nanomaterial and a polymer.

### Claim 13 (depends on 12)

The transparent conductive electrode of claim 12, further comprising a first protective film;
wherein the first protective film has a front surface and a back surface;
wherein the back surface of the first protective film faces the front surface of the first electrically conductive nanocomposite layer; and
wherein the first protective film comprises PET, PMMA, PC, PEN, TAC, PI, or any combination thereof.

### Claim 14 (depends on 12)

The transparent conductive electrode of claim 12, further comprising a second protective film;
wherein the second protective film has a front surface and a back surface;
wherein the back surface of the second protective film faces the front surface of the second electrically conductive nanocomposite layer; and
wherein the second protective film comprises PET, PMMA, PC, PEN, TAC, PI, or any combination thereof.

### Claim 15 (depends on 12)

The transparent conductive electrode of claim 12, wherein concentration of the electrically conductive nanomaterial layer at or around the front surface of the second electrically conductive nanocomposite layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the second electrically conductive nanocomposite layer.

### Claim 16 (depends on 12)

The transparent conductive electrode of claim 12, wherein the electrically conductive nanomaterial of the first electrically conductive nanocomposite layer and/or the electrically conductive nanomaterial of the second electrically conductive nanocomposite layer each comprise(s) a nanowire, a nanoribbon, a nanotube, a nanoparticle, or any combination thereof.

### Claim 17 (depends on 12)

The transparent conductive electrode of claim 12, wherein the electrically conductive nanomaterial of the first electrically conductive nanocomposite layer and/or the electrically conductive nanomaterial of the second electrically conductive nanocomposite layer each comprise(s) a silver nanowire, a copper nanowire, a gold nanowire, a stainless steel nanowire, or any combination thereof.

### Claim 18 (depends on 12)

The transparent conductive electrode of claim 12, wherein the polymer of the first electrically conductive nanocomposite layer and/or the polymer of the second electrically conductive nanocomposite layer comprise(s) a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 19

A system comprising:
a cover lens;
a first lamination layer;
a first sensor layer;
an optically clear adhesive layer;
a transparent substrate;
a second lamination layer; and
a second sensor layer;
wherein the cover lens, the first lamination layer, the first sensor layer, the optically clear adhesive layer, the transparent substrate, the second lamination layer, and the second sensor layer each have a front surface and a back surface;
wherein the first lamination layer is between the cover lens and the first sensor layer;
wherein the optically clear adhesive layer is between the first sensor layer and the transparent substrate;
wherein the second lamination layer is between the transparent substrate and the second sensor layer;
wherein the cover lens is formed on the front surface of the first lamination layer;
wherein the first lamination layer is formed on the front surface of the first sensor layer;
wherein the first sensor layer is formed on the front surface of the optically clear adhesive layer;
wherein the optically clear adhesive layer is formed on the front surface of the transparent substrate;
wherein the transparent substrate is formed on the front surface of the second lamination layer; and
wherein the second lamination layer is formed on the front surface of the second sensor layer.

### Claim 20 (depends on 19)

The system of claim 19, wherein the first sensor layer and/or the second sensor layer each comprise(s) a pattern such that the system can detect a touch.

### Claim 21 (depends on 19)

The system of claim 19, wherein the first sensor layer and/or the second sensor layer each comprise(s) an electrically conductive nanomaterial and a polymer.

### Claim 22 (depends on 21)

The system of claim 21, wherein concentration of the electrically conductive nanomaterial at or around the front surface of the first sensor layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the first sensor layer.

### Claim 23 (depends on 21)

The system of claim 21, wherein concentration of the electrically conductive nanomaterial at or around the front surface of the second sensor layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the second sensor layer.

### Claim 24 (depends on 21)

The system of claim 21, wherein the electrically conductive nanomaterial comprises a nanowire, a nanoribbon, a nanotube, a nanoparticle, or any combination thereof.

### Claim 25 (depends on 21)

The system of claim 21, wherein the electrically conductive nanomaterial comprises a silver nanowire, a copper nanowire, a gold nanowire, a stainless steel nanowire, or any combination thereof.

### Claim 26 (depends on 21)

The system of claim 21, wherein the polymer of the first sensor layer and/or the polymer of the second layer each comprise(s) a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 27 (depends on 20)

The system of claim 20, wherein the pattern of the first sensor layer and/or the pattern of the second sensor layer each form(s) a touch sensor.

### Claim 28 (depends on 27)

The system of claim 27, wherein the system is a display system comprising the touch sensor.

### Claim 29 (depends on 28)

The system of claim 28, wherein the display system is a liquid crystal display, a light emitting display, a light emitting organic display, a plasma display, an electrochromic display, an electrophoretic display, an electrowetting display, an electrofluidic display, or any combination thereof.

### Claim 30

A system comprising:
a cover lens;
an optically clear adhesive layer;
a first sensor layer;
a first lamination layer;
a transparent substrate;
a second lamination layer; and
a second sensor layer;
wherein the cover lens, the optically clear adhesive layer, the first sensor layer, the first lamination layer, the transparent substrate, the second lamination layer, and the second sensor layer each have a front surface and a back surface;
wherein the optically clear adhesive layer is between the cover lens and the first sensor layer;
wherein the first lamination layer is between the first sensor layer and the transparent substrate;
wherein the second lamination layer is between the transparent substrate and the second sensor layer;
wherein the cover lens is formed on the front surface of the optically clear adhesive layer;
wherein the optically clear adhesive layer is formed on the front surface of the first sensor layer;
wherein the first sensor layer is formed on the front surface of the first lamination layer;
wherein the first lamination layer is formed on the front surface of the transparent substrate;
wherein the transparent substrate is formed on the front surface of the second lamination layer; and
wherein the second lamination layer is formed on the front surface of the second sensor layer.

### Claim 31 (depends on 30)

The system of claim 30, wherein the first sensor layer and/or the second sensor layer each comprise(s) a pattern such that the system can detect a touch.

### Claim 32 (depends on 30)

The system of claim 30, wherein the first sensor layer and/or the second sensor layer each comprise(s) an electrically conductive nanomaterial and a polymer.

### Claim 33 (depends on 31)

The system of claim 31, wherein concentration of the electrically conductive nanomaterial at or around the front surface of the first sensor layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the first sensor layer.

### Claim 34 (depends on 31)

The system of claim 31, wherein concentration of the electrically conductive nanomaterial at or around the front surface of the second sensor layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the second sensor layer.

### Claim 35 (depends on 31)

The system of claim 31, wherein the electrically conductive nanomaterial comprises a nanowire, a nanoribbon, a nanotube, a nanoparticle, or any combination thereof.

### Claim 36 (depends on 31)

The system of claim 31, the electrically conductive nanomaterial comprises a silver nanowire, a copper nanowire, a gold nanowire, a stainless steel nanowire, or any combination thereof.

### Claim 37 (depends on 36)

The system of claim 36, wherein the polymer of the first sensor layer and/or the second layer each comprise(s) a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 38 (depends on 31)

The system of claim 31, wherein the pattern of the first sensor layer and/or pattern of the second sensor layer each form(s) a touch sensor.

### Claim 39 (depends on 38)

The system of claim 38, wherein the system is a display system comprising the touch sensor.

### Claim 40 (depends on 39)

The system of claim 39, wherein the display system is a liquid crystal display, a light emitting display, a light emitting organic display, a plasma display, an electrochromic display, an electrophoretic display, an electrowetting display, an electrofluidic display, or any combination thereof.

### Claim 41

A transparent conductive electrode comprising:
an electrically conductive nanocomposite layer;
a lamination layer;
a coupling layer; and
a transparent substrate;
wherein the electrically conductive nanocomposite layer, the lamination layer, the coupling layer, and the transparent substrate each have a front surface and a back surface;
wherein the front surface of the lamination layer faces the back surface of the electrically conductive nanocomposite layer;
wherein the front surface of the coupling layer faces the back surface of the lamination layer;
wherein the front surface of the transparent substrate faces the back surface of the coupling layer;
wherein the lamination layer is between the conductive nanocomposite layer and the coupling layer;
wherein the coupling layer is between the transparent substrate and the lamination layer; and
wherein the electrically conductive nanocomposite layer comprises an electrically conductive nanomaterial and a polymer.

### Claim 42 (depends on 41)

The transparent conductive electrode of claim 41, further comprising a first protective film; wherein the first protective film has a front surface and a back surface; and wherein the back surface of the first protective film faces the front surface of the first electrically conductive nanocomposite layer.

### Claim 43 (depends on 42)

The transparent conductive electrode of claim 42, wherein the first protective film comprises PET, PMMA, PC, PEN, TAC, PI, or any combination thereof.

### Claim 44 (depends on 41)

The transparent conductive electrode of claim 41, wherein the transparent substrate comprises PMMA, PC, a glass, or any combination thereof.

### Claim 45 (depends on 41)

The transparent conductive electrode of claim 41, wherein the transparent substrate comprises a glass.

### Claim 46 (depends on 41)

The transparent conductive electrode of claim 41, wherein the first lamination layer comprises a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 47 (depends on 41)

The transparent conductive electrode of claim 41, wherein concentration of the electrically conductive nanomaterial at or around the front surface of the electrically conductive nanocomposite layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the electrically conductive nanocomposite layer.

### Claim 48 (depends on 41)

The transparent conductive electrode of claim 41, wherein the electrically conductive nanomaterial comprises a nanowire, a nanoribbon, a nanotube, a nanoparticle, or any combination thereof.

### Claim 49 (depends on 41)

The transparent conductive electrode of claim 41, wherein the electrically conductive nanomaterial comprises a silver nanowire, a copper nanowire, a gold nanowire, a stainless steel nanowire, or any combination thereof.

### Claim 50 (depends on 41)

The transparent conductive electrode of claim 41, wherein the polymer of the electrically conductive nanocomposite layer comprises a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 51 (depends on 41, 43)

The transparent conductive electrode of claim 41, further comprising:
a second coupling layer;
a second lamination layer; and
a second electrically conductive nanocomposite layer;
wherein the electrically conductive nanocomposite layer of claim 43 is the first electrically conductive nanocomposite layer;
wherein the second lamination layer of claim 43 is the first lamination layer;
wherein the second coupling layer of claim 43 is the first coupling layer;
wherein the second coupling layer, the second lamination layer, and the second electrically conductive nanocomposite layer each have a front surface and a back surface;
wherein the front surface of the second coupling layer faces the back surface of the transparent substrate;
wherein the front surface of the second lamination layer faces the back surface of the second coupling layer;
wherein the back surface of the second electrically conductive nanocomposite layer faces the back surface of the second lamination layer;
wherein the second coupling layer is between the transparent substrate and the second lamination layer;
wherein the second lamination layer is between the second coupling layer and the second electrically conductive nanocomposite layer; and
wherein the second electrically conductive nanocomposite layer comprises an electrically conductive nanomaterial and a polymer.

### Claim 52 (depends on 51)

The transparent conductive electrode of claim 51, further comprising a first protective film; wherein the first protective film has a front surface and a back surface; and wherein the back surface of the first protective film faces the front surface of the first electrically conductive nanocomposite layer.

### Claim 53 (depends on 52)

The transparent conductive electrode of claim 52, wherein the first protective film comprises PET, PMMA, PC, PEN, TAC, PI, or any combination thereof.

### Claim 54 (depends on 51)

The transparent conductive electrode of claim 51, wherein concentration of the electrically conductive nanomaterial layer at or around the front surface of the first electrically conductive nanocomposite layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the first electrically conductive nanocomposite layer.

### Claim 55 (depends on 51)

The transparent conductive electrode of claim 51, wherein concentration of the electrically conductive nanomaterial layer at or around the front surface of the second electrically conductive nanocomposite layer is higher than concentration of the electrically conductive nanomaterial at or around the back surface of the second electrically conductive nanocomposite layer.

### Claim 56 (depends on 51)

The transparent conductive electrode of claim 51, wherein the electrically conductive nanomaterial of the first electrically conductive nanomaterial layer and/or the electrically conductive nanomaterial of the second electrically conductive nanomaterial layer each comprise(s) a nanowire, a nanoribbon, a nanotube, a nanoparticle, or any combination thereof.

### Claim 57 (depends on 51)

The transparent conductive electrode of claim 51, wherein the electrically conductive nanomaterial of the first electrically conductive nanomaterial layer and/or the electrically conductive nanomaterial of the second electrically conductive nanomaterial layer each comprise(s) a silver nanowire, a copper nanowire, a gold nanowire, a stainless steel nanowire, or any combination thereof.

### Claim 58 (depends on 51)

The transparent conductive electrode of claim 51, wherein the polymer of the second electrically conductive nanocomposite layer comprises a polyacrylate, a polymethacrylate, a polyurethane acrylate, a polyisocyanurate acrylate, a polyepoxide, or any combination thereof.

### Claim 59 (depends on 51)

The transparent conductive electrode of claim 51, further comprising a second protective film; wherein the second protective film has a front surface and a back surface; and wherein the back surface of the second protective film faces the front surface of the second electrically conductive nanocomposite layer.

### Claim 60 (depends on 59)

The transparent conductive electrode of claim 59, wherein the second protective film comprises PET, PMMA, PC, PEN, TAC, PI, or any combination thereof.

### Claim 61 (depends on 51)

The transparent conductive electrode of claim 51, wherein the first coupling layer is formed by using a siloxane oligomer.

### Claim 62 (depends on 61)

The transparent conductive electrode of claim 61, wherein the siloxane oligomer is prepared by hydrolysis of a trialkoxysilane; wherein:
trialkoxysilane has a general chemical formula F—R1—Si(OR2)3;
F is a UV or a thermally curable functional group comprising an acryloxy, a methacryloxy, or an epoxy group;
R1 is C3 to C20 alkylene group; and
R2 is a C1 to C5 alkyl group.

### Claim 63 (depends on 62)

The transparent conductive electrode of claim 62, wherein the trialkoxysilane is methacryloxy propyltrimethoxysilane.

### Claim 64 (depends on 51)

The transparent conductive electrode of claim 51, wherein the first coupling layer and the second coupling layer are formed by using a siloxane oligomer.

### Claim 65 (depends on 64)

The transparent conductive electrode of claim 64, wherein the siloxane oligomer is prepared by hydrolysis of a trialkoxysilane; wherein:
trialkoxysilane has a general chemical formula F—R1—Si(OR2)3;
F is a UV or a thermally curable functional group comprising an acryloxy, a methacryloxy, or an epoxy group;
R1 is C3 to C20 alkylene group; and
R2 is a C1 to C5 alkyl group.

### Claim 66 (depends on 65)

The transparent conductive electrode of claim 65, wherein the trialkoxysilane is methacryloxy propyltrimethoxysilane.