Method for manufacturing touch-panel conductive sheet, and touch-panel conductive sheet

• US 9,891,777 B2
• Filed: 10/14/2015
• Issued: 02/13/2018
• Est. Priority Date: 04/15/2013
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Ichiki, Akira
• Primary Examiner(s): Shankar, Vijay
• Application Number:
  US14/883,339
• Publication Number:
  US 20160034081A1
• Time in Patent Office: 853 Days
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: H05K 1/0296 Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295 H05K1/11 takes precedence; lay-out adapted to mounted component configuration H05K1/18
• CPC Class Codes: H05K 1/115 Via connections; Lands around holes or via connections H05K1/112 takes precedence
• CPC Class Codes: H05K 2201/09563 Metal filled via plated through-hole filled with insulating material H05K2201/0959
• CPC Class Codes: H05K 2201/09681 Mesh conductors, e.g. as a ground plane
• CPC Class Codes: H05K 2203/125 Inorganic compounds, e.g. silver salt
• CPC Class Codes: H05K 3/106 by photographic methods
• CPC Class Codes: H05K 3/4007 Surface contacts, e.g. bumps H05K3/4092 takes precedence; deposition of finish layers on pads H05K3/24; forming solder bumps H05K3/3457
• CPC Class Codes: H05K 3/4038 Through-connections; Vertical interconnect access [VIA] connections H05K3/403, H05K3/42 take precedence
• CPC Class Codes: H05K 3/4053 by thick-film techniques

Abstract

An object of the invention is to provide a method for more easily manufacturing a touch-panel conductive sheet in which end portions of lead-out wires are collected on one surface side of a substrate with high productivity, and a touch-panel conductive sheet. The method for manufacturing a touch-panel conductive sheet of the invention includes: forming, on a rear surface of a substrate, first detection electrodes and rear surface-side wires of which one ends are electrically connected to the first detection electrodes and the other ends have first pad portions, and on a front surface of the substrate, second detection electrodes, second lead-out wires which are electrically connected to the second detection electrodes, and second pad portions which are arranged at positions opposed to the first pad portions via the substrate; forming through holes penetrating the first pad portions, the substrate, and the second pad portions; and producing through wires which electrically connect the first pad portions and the second pad portions by filling the through holes with a conductive material to form first lead-out wires which include the rear surface-side wires and the through wires and are electrically connected to the first detection electrodes.

Claims

1. A touch-panel conductive sheet comprising:

a substrate;

first detection electrodes which are arranged on a rear surface of the substrate;

first lead-out wires of which one ends are electrically connected to the first detection electrodes and the other ends are arranged on a front surface of the substrate, and which include through wires as a part;

second detection electrodes which are arranged on the front surface of the substrate; and

second lead-out wires which are electrically connected to the second detection electrodes,

wherein the first detection electrodes, the second detection electrodes, the first lead-out wires, and the second lead-out wires contain the same metallic material,

wherein the through wires are electrically connected to the first pad portions and second pad portions by through holes filled with a conductive material,

wherein the through holes penetrate the first pad portions, the substrate, and the second pad portions,

wherein the first pad portions are provided at end portions of the first detection electrodes or at the first lead-out wires, and

wherein the second pad portions are arranged at positions opposed to the first pad portions via the substrate.

2. The touch-panel conductive sheet according to claim 1,

wherein the first pad portions have same size as the second pad portions.

3. The touch-panel conductive sheet according to claim 1,

wherein the first pad portions and the second pad portions have a circular shape.

4. The touch-panel conductive sheet according to claim 1,

wherein the through holes have a diameter smaller than those of the first pad portion and the second pad portion.

5. A method for manufacturing a touch-panel conductive sheet, comprising:

forming, on a rear surface of a substrate, first detection electrodes and rear surface-side wires of which one ends are electrically connected to the first detection electrodes and the other ends have first pad portions, and on a front surface of the substrate, second detection electrodes, second lead-out wires which are electrically connected to the second detection electrodes, and second pad portions which are arranged at positions opposed to the first pad portions via the substrate;

forming through holes penetrating the first pad portions, the substrate, and the second pad portions; and

producing through wires which electrically connect the first pad portions and the second pad portions by filling the through holes with a conductive material to form first lead-out wires which include the rear surface-side wires and the through wires and are electrically connected to the first detection electrodes.

6. The method for manufacturing a touch-panel conductive sheet according to claim 5,

wherein the first detection electrodes, the second detection electrodes, the first lead-out wires, and the second lead-out wires are made of the same metallic material.

7. The method for manufacturing a touch-panel conductive sheet according to claim 5,

wherein the first pad portions have a same size as the second pad portions.

8. The method for manufacturing a touch-panel conductive sheet according to claim 5,

wherein the first pad portions and the second pad portions have a circular shape.

9. The method for manufacturing a touch-panel conductive sheet according to claim 5,

wherein the through holes have a diameter smaller than those of the first pad portion and the second pad portion.

10. The method for manufacturing a touch-panel conductive sheet according to claim 5,

wherein the through holes are formed by drilling processing and laser processing.

11. A method for manufacturing a touch-panel conductive sheet, comprising:

forming, on a rear surface of a substrate, first detection electrodes and first pad portions which are electrically connected to end portions of the first detection electrodes, and on a front surface of the substrate, second detection electrodes, second lead-out wires which are electrically connected to the second detection electrodes, and front surface-side wires which have second pad portions arranged at positions opposed to the first pad portions via the substrate and wiring portions electrically connected to the second pad portions;

forming through holes penetrating the first pad portions, the substrate, and the second pad portions; and

producing through wires which electrically connect the first pad portions and the second pad portions by filling the through holes with a conductive material to form first lead-out wires which include the front surface-side wires and the through wires and are electrically connected to the first detection electrodes.

12. The method for manufacturing a touch-panel conductive sheet according to claim 11,

wherein the first detection electrodes, the second detection electrodes, the first lead-out wires, and the second lead-out wires are made of the same metallic material.

13. The method for manufacturing a touch-panel conductive sheet according to claim 11,

wherein the first pad portions have a same size as the second pad portions.

14. The method for manufacturing a touch-panel conductive sheet according to claim 11,

wherein the first pad portions and the second pad portions have a circular shape.

15. The method for manufacturing a touch-panel conductive sheet according to claim 11,

wherein the through holes have a diameter smaller than those of the first pad portion and the second pad portion.

16. The method for manufacturing a touch-panel conductive sheet according to claim 11,

wherein the through holes are formed by drilling processing and laser processing.

17. A method for manufacturing a touch-panel conductive sheet, comprising:

forming, on a rear surface of a substrate, first detection electrodes and rear surface-side wires of which one ends are electrically connected to the first detection electrodes and the other ends have first pad portions, and on a front surface of the substrate, second detection electrodes, second lead-out wires which are electrically connected to the second detection electrodes, and front surface-side wires which have second pad portions arranged at positions opposed to the first pad portions via the substrate and wiring portions electrically connected to the second pad portions;

forming through holes penetrating the first pad portions, the substrate, and the second pad portions; and

producing through wires which electrically connect the first pad portions and the second pad portions by filling the through holes with a conductive material to form first lead-out wires which include the front surface-side wires, the through wires, and the rear surface-side wires and are electrically connected to the first detection electrodes.

18. The method for manufacturing a touch-panel conductive sheet according to claim 17,

wherein the first detection electrodes, the second detection electrodes, the first lead-out wires, and the second lead-out wires are made of the same metallic material.

19. The method for manufacturing a touch-panel conductive sheet according to claim 17,

wherein the first pad portions have a same size as the second pad portions.

20. The method for manufacturing a touch-panel conductive sheet according to claim 17,

wherein the first pad portions and the second pad portions have a circular shape.

21. The method for manufacturing a touch-panel conductive sheet according to claim 17,

wherein the through holes have a diameter smaller than those of the first pad portion and the second pad portion.

22. The method for manufacturing a touch-panel conductive sheet according to claim 17,

wherein the through holes are formed by drilling processing and laser processing.