CAPACITIVE SENSING COMPONENT, PREPARATION METHOD THEREOF AND TOUCH SCREEN HAVING THE SAME

• US 20140118009A1
• Filed: 12/20/2012
• Published: 05/01/2014
• Est. Priority Date: 04/19/2012
• Status: Abandoned Application

• Current Assignee: Shenzhen O-Film Tech Company Limited
• Original Assignee: Shenzhen O-Film Tech Company Limited
• Inventors: Cheng, Zhizheng, Meng, Kai, Cai, Rongjun
• Application Number:
  US14/000,163
• Publication Number:
  US 20140118009A1
• Time in Patent Office: Days
• US Class Current: 324/658
• CPC Class Codes: G01R 27/2605 Measuring capacitance capacitive sensors G01D5/24
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: 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
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A capacitive sensing component includes a substrate and a patterned sensing layer formed on the substrate; the patterned sensing layer includes a plurality of sensing electrodes, the plurality of sensing electrodes are formed of a metal mesh laying on the substrate. The cost of the capacitive sensing component is low. A preparation method of a capacitive sensing component and a touch screen are also provided.

Claims

1. A capacitive sensing component, comprising:

a substrate and a patterned sensing layer formed on the substrate, wherein the patterned sensing layer comprises a plurality of sensing electrodes, the plurality of sensing electrodes are formed by a metal mesh arranged on the substrate.

2. The capacitive sensing component according to claim 1, wherein the width of the line of the metal mesh is greater than or equals to 45 nm and less than or equals to 40000 nm.

3. The capacitive sensing component according to claim 1, wherein the metal mesh is made of a material selected from the group consisting of copper, molybdenum-aluminum-molybdenum alloy, and copper-nickel alloy.

4. The capacitive sensing component according to claim 1, wherein a surface of the metal mesh is provided with an anti-oxidation layer, the anti-oxidation layer is made of a material selected from the group consisting of gold, platinum, and nickel.

5. A preparation method of a capacitive sensing component, comprising the following steps:

forming a metal layer on a substrate; and

processing the metal layer to form a metal mesh by exposure and development, and further pattern the metal mesh to a plurality of sensing electrodes arrayed on the substrate, thereby forming a patterned sensing layer on the substrate.

6. The preparation method of the touch screen according to claim 5, wherein the metal layer is made of a material selected from the group consisting of copper, molybdenum-aluminum-molybdenum alloy, and copper-nickel alloy.

7. A touch screen, comprising:

at least one capacitive sensing component, the capacitive sensing component comprising;

a substrate and a patterned sensing layer formed on the substrate, wherein the patterned sensing layer comprises a plurality of sensing electrodes, the plurality of sensing electrodes are formed by a metal mesh arranged on the substrates; and

a cover plate laminated on the patterned sensing layer of the capacitive sensing component.

8. The touch screen according to claim 7, wherein the sensing electrodes comprise a first sensing electrodes and a second sensing electrodes, the first sensing electrodes and the second sensing electrodes are alternately arranged.

9. The touch screen according to claim 7, wherein the number of the capacitive sensing components is two, the substrate of one of the capacitive sensing components is laminated on the patterned sensing layer of the other capacitive sensing component, the sensing electrodes of the patterned sensing layer of one of the capacitive sensing components are arrayed along a first direction, the sensing electrodes of the second patterned sensing layer of the other capacitive sensing component are arrayed along a second direction.

10. The touch screen according to claim 9, wherein the first direction is perpendicular to the second direction.