Method for manufacturing touch device and resin composition thereof

Patent metadata

Field	Value
Publication number	US-11445613-B2
Application number	US-202016734926-A
Country	US
Kind code	B2
Filing date	Jan 6, 2020
Priority date	Dec 30, 2013
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

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.

First claim

What is claimed is:

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.

2. 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.

3. 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.

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

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

Assignees

• Lg Display Co Ltd

Inventors

• Kim Nakwon
• Choi Seungkyu
• Hong Seongjae
• Shin Dongwook

Classifications

• C03C15/00 Primary

  Surface treatment of glass, not in the form of fibres or filaments, by etching (etching or surface-brightening compositions, in general C09K13/00) · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• C09D133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• H05K1/189 Primary

  characterised by the use of flexible or folded printed circuits · CPC title