Display device with touch panel that provides suppression of reduction characteristics of the display device

• US 9,952,710 B2
• Filed: 01/28/2016
• Issued: 04/24/2018
• Est. Priority Date: 04/22/2008
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Japan Display Incorporated, Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Teramoto, Masahiro
• Primary Examiner(s): RABINDRANATH, ROY P
• Application Number:
  US15/008,933
• Publication Number:
  US 20160162109A1
• Time in Patent Office: 817 Days
• Field of Search: 345173-178
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• 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 3/03547 Touch pads, in which fingers can move on a surface
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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 3/0445 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: H01L 21/02063 the processing being the formation of vias or contact holes
• CPC Class Codes: H01L 21/0425 Making electrodes
• CPC Class Codes: H01L 21/044 Conductor-insulator-semiconductor electrodes
• CPC Class Codes: H01L 21/311 Etching the insulating layers by chemical or physical means H01L21/31058 takes precedence
• CPC Class Codes: H01L 21/3213 Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
• CPC Class Codes: H05K 3/0017 Etching of the substrate by chemical or physical means

Abstract

A manufacturing method of a touch panel includes the steps of providing a substrate, forming a first conductive film on the substrate, forming a first mask on the first conductive film, etching the first conductive film to form electrode portions and lower intersect portions of the touch panel, forming an insulating film made of a negative resist on the first conductive film, and forming a contact hole above the electrode portion by removing the insulating film. The steps further include forming a second conductive film on the insulating film, forming a second mask on the second conductive film, etching the second conductive film to form an upper intersect portion connected between two adjacent electrode portions via the contact hole and intersecting with the lower intersect portion, and forming protective film on the second conductive film.

Claims

1. A touch panel comprising:

a substrate;

a plurality of electrodes formed on the substrate, the plurality of electrodes including a first group of electrodes and a second group of electrodes, each of the first group of electrodes having a contact portion;

an insulating film made of a negative resist and formed on the plurality of electrodes;

an intersecting electrode formed on the insulating film and intersecting with each of the second group of electrodes; and

a protective film made of a negative resist on the intersecting electrode and on the insulating film,

wherein each of the first group of electrodes is exposed from the insulating film at the contact portion,

wherein the intersecting electrode is connected to each of the first group of electrodes at the contact portion, and

the insulating film is different in a planar shape from the plurality of electrodes.

2. The touch panel according to claim 1, wherein the plurality of electrodes is made of a transparent conductive material.

3. The touch panel according to claim 1, wherein the protective film is provided above the contact portion.

4. A touch panel comprising:

a substrate;

an X electrode formed on the substrate, the X electrode having a contact portion;

a Y electrode formed on the substrate;

an insulating film made of a negative resist on the X electrode and the Y electrode, the insulating film exposing the contact portion;

an intersecting electrode formed on the insulating film; and

a protective film made of a negative resist on the intersecting electrode and on the insulating film,

wherein the intersecting electrode is connected to the X electrode at the contact portion and intersects the Y electrode, and

the insulating film is different in a planar shape from the X electrode and the Y electrode.

5. The touch panel according to claim 4, wherein the X electrode and the Y electrode are made of a transparent conductive material.

6. The touch panel according to claim 4, wherein the protective film is provided above the contact portion.