MANUFACTURING METHODS OF TOUCH PANEL, DISPLAY DEVICE, AND ELECTRONIC APPARATUS

• US 20100233930A1
• Filed: 03/08/2010
• Published: 09/16/2010
• Est. Priority Date: 03/12/2009
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: MOMOSE, Kaoru, ISHIDA, Kohei
• Granted Patent: US 8,444,448 B2
• Time in Patent Office: Days
• US Class Current: 445/24
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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

Abstract

A manufacturing method of a touch panel having a plurality of first electrodes and a plurality of second electrodes which are formed on one surface of a substrate and extend in directions crossing each other, includes: forming the second electrodes so as to be separated at intersections between the first and second electrodes on the substrate; forming the first electrodes at the intersections on the substrate; forming an insulating film at least on the first electrodes at the intersections using a printing method; and forming bridge wirings that connect the second electrodes separated at the intersections to each other over the insulating film using the printing method, wherein forming partition walls for partitioning at least a part of a profile shape of the insulating film is performed prior to the forming of the insulating film.

Claims

1. A manufacturing method of a touch panel having a plurality of first electrodes and a plurality of second electrodes which are formed on one surface of a substrate and extend in directions crossing each other, the method comprising:

forming the second electrodes so as to be separated at intersections between the first and second electrodes on the substrate;

forming the first electrodes at the intersections on the substrate;

forming an insulating film at least on the first electrodes at the intersections using a printing method; and

forming bridge wirings that connect the second electrodes separated at the intersections to each other over the insulating film using the printing method,

wherein forming partition walls for partitioning at least a part of a profile shape of the insulating film is performed prior to the forming of the insulating film.

2. The manufacturing method of the touch panel according to claim 1,

wherein the partition walls include the second electrodes separated at the intersections.

3. The manufacturing method of the touch panel according to claim 2,

wherein the first electrodes at the intersections are formed so as to be thinner than the second electrodes;

and

the insulating film is formed between the separated second electrodes so as to be approximately even with upper surfaces of the second electrodes.

4. The manufacturing method of the touch panel according to claim 1, further comprising:

forming the second electrodes on the entire surface of the substrate;

applying a photosensitizing agent onto the second electrodes;

exposing the photosensitizing agent located at the intersections; and

removing the exposed photosensitizing agent and the second electrodes which are located at the intersections,

wherein the partition walls are the unexposed photosensitizing agent which remains after the removing of the exposed photosensitizing agent.

5. The manufacturing method of the touch panel according to claim 1,

wherein an insulating film forming material used in the printing method exhibits a liquid repellent property with respect to the partition walls and exhibits a liquid affinity property with respect to a surface of the substrate.

6. A manufacturing method of a display device comprising:

manufacturing a touch panel by the manufacturing method according to claim 1.

7. A manufacturing method of an electronic apparatus comprising:

manufacturing a display device by the manufacturing method according to claim 6.