TRANSPARENT CONDUCTIVE SUBSTRATE, METHOD OF FABRICATING THE SAME, AND TOUCH PANEL HAVING THE SAME

• US 20140186615A1
• Filed: 12/24/2013
• Published: 07/03/2014
• Est. Priority Date: 12/27/2012
• Status: Abandoned Application

• Current Assignee: Samsung Corning Precision Materials Company Limited (Corning Incorporated)
• Original Assignee: Samsung Corning Precision Materials Company Limited (Corning Incorporated)
• Inventors: AN, Jin-Soo, OH, Jung Hong, LEE, Jae Hong, RIM, Chang Moog
• Application Number:
  US14/140,320
• Publication Number:
  US 20140186615A1
• Time in Patent Office: Days
• US Class Current: 428/332
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133302 Rigid substrates, e.g. inorganic substrates
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension

Abstract

A transparent conductive substrate, a method of fabricating the same, and a touch panel including the same. The transparent conductive substrate includes a first thin film layer, a second thin film layer and a transparent conductive film which are sequentially provided on a glass substrate. The first thin film layer has a refractive index ranging from 2.2 to 2.7 at a wavelength of 550 nm and a thickness ranging from 7.6 to 9.4 nm. The second thin film layer has a refractive index ranging from 1.4 to 1.5 at a wavelength of 550 nm and a thickness ranging from 37 to 46.2 nm. The transparent conductive film is made of a transparent conductive material having a refractive index material ranging from 1.8 to 2.0 at a wavelength of 550 nm. The thickness of the transparent conductive film ranges from 24 to 38.5 nm.

Claims

1. A transparent conductive substrate comprising:

a glass substrate;

a first thin film layer provided on the glass substrate, wherein a refractive index of the first thin film layer ranges from 2.2 to 2.7 at a wavelength of 550 nm, and a thickness of the first thin film layer ranges from 7.6 to 9.4 nm;

a second thin film layer provided on the first thin film layer, wherein a refractive index of the second thin film layer ranges from 1.4 to 1.5 at a wavelength of 550 nm, and a thickness of the second thin film layer ranges from 37 to 46.2 nm; and

a transparent conductive film provided on the second thin film, wherein the transparent conductive film comprises a transparent conductive material, a refractive index of the transparent conductive material ranges from 1.8 to 2.0 at a wavelength of 550 nm, and a thickness of the transparent conductive film ranges from 24 to 38.5 nm.

2. The transparent conductive substrate of claim 1, wherein the first thin film layer comprises Nb₂O₅.

3. The transparent conductive substrate of claim 1, wherein the second thin film layer comprises SiO₂.

4. The transparent conductive substrate of claim 1, wherein the transparent conductive material comprises indium tin oxide.

5. The transparent conductive substrate of claim 1, wherein the transparent conductive film comprises a patterned area in which the transparent conductive material is removed and a non-patterned area in which the transparent conductive material is not removed.

6. The transparent conductive substrate of claim 5, wherein a difference in average reflectance between the patterned area and the non-patterned area is 1% or less at a wavelength ranging from 400 to 700 nm.

7. The transparent conductive substrate of claim 1, wherein the glass substrate comprises flexible glass.

8. The transparent conductive substrate of claim 1, wherein a sheet resistance of the transparent conductive film is 50 Ω

/□

or less.

9. A touch panel comprising the transparent conductive substrate recited in any one of claim 1.