# US 11,445,613 B2 · Method for manufacturing touch device and resin composition thereof

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- Number: US 11,445,613 B2
- Document ID: US11445613B2
- Status: Granted
- Kind: B2
- Application number: 16/734,926
- Filed: 2020-01-06
- Published: 2020-05-07
- Granted: 2022-09-13
- Earliest claimed: 2013-12-30
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: NakWon Kim; SeungKyu Choi; Seongjae Hong; Dongwook Shin
- Web page: https://patentgrep.com/patent/US11445613B2

## CPC

- H05K 1/189: characterised by the use of flexible or folded printed circuits
- C03C 15/00: Surface treatment of glass, not in the form of fibres or filaments, by etching (etching or surface-brightening compositions, in general C09K13/00)
- C09D 133/14: of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
- C09D 161/06: of aldehydes with phenols
- C03C 2218/355: Temporary coating
- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- Y10T 428/24355: Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- 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
- 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)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Discussed is a method for manufacturing a touch device, the method including forming a protective layer per touch sensor on first and second surfaces of a mother substrate on which two or more touch sensors are formed; dividing the mother substrate into two or more substrates of a touch sensor unit by mechanically cutting or chemically treating the mother substrate; chemically strengthening an edge of each of the divided substrates; and removing the protective layer from at least one divided substrate.

## Claims

### Claim 1

A method for manufacturing a touch device, the method comprising:
forming a protective layer per touch sensor on first and second surfaces of a mother substrate on which two or more touch sensors are formed;
dividing the mother substrate into two or more substrates of a touch sensor unit by mechanically cutting or chemically treating the mother substrate;
chemically strengthening an edge of each of the divided substrates; and
removing the protective layer from at least one divided substrate,
wherein in the forming of the protective layer, the protective layer is formed by coating a paste of a resin composition comprising a resin mixture of 20˜50% by weight which includes a phenol resin and an epoxy acrylate resin with a weight ratio of 10:90 to 90:10, and a solvent of 5 to 70% by weight on the first and second surfaces of the mother substrate,
wherein the resin composition further comprises a filler of 10˜50% by weight selected from a group consisting of calcium carbonate, barium sulfate, titanium dioxide and silica,
wherein the solvent is selected from a group consisting of dipropylene glycol methyl ether, butyl carbitol, and terpineol,
wherein the phenol resin is one of a novolac or a resol, and
wherein in the removing of the protective layer, the protective layer is stripped by one of an aqueous potassium hydroxide solution or an aqueous amine-based solution.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein the resin composition further comprises an elastomer and a photo initiator of 1 to 50% by weight together.

### Claim 3 (depends on 2)

The method as claimed in claim 2, wherein the elastomer is selected from a group consisting of an Ethylene propylene rubber, an Ethylene propylene diene monomer rubber, a silicone rubber and a nitrile rubber.

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein a viscosity of the resin composition is 10,000˜60,000 mPa·s at room temperature.

### Claim 5 (depends on 1)

The method as claimed in claim 1, wherein the filler has an average particle size of approximately 2 μm.