Method of manufacture of active matrix substrate and liquid crystal display device

• US 20040203180A1
• Filed: 04/30/2004
• Published: 10/14/2004
• Est. Priority Date: 10/17/2000
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Kawase, Tomomi, Kiguchi, Hiroshi, Shimizu, Masaharu, Katagami, Satoru, Aruga, Hisashi
• Granted Patent: US 7,037,737 B2
• Time in Patent Office: Days
• US Class Current: 438/28
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate

Abstract

A manufacturing method of an active matrix substrate which can prevent the complexity of manufacturing processes, widens the range of material choice and allows high manufacturing yield, and a manufacturing method of a liquid crystal display using such active matrix substrate. Conductive colored layers (606 to 608) functioning as pixel electrodes and color filters are formed by a process of discharging, by an ink jet method, a mixed ink of coloring material and conductive material to the formation area of a pixel electrode to be connected electrically to an active element (602).

Claims

1. A method of manufacture of an active matrix substrate, in which active elements are formed in a matrix, comprising:

forming an active element comprising a first electrode wire, a second electrode wire, and a first insulating layer on the substrate;

forming a second insulating layer that serves as a protective film for the first electrode wire of the active element;

discharging, into an area of formation of a pixel electrode to be electrically connected to the active element, ink in which are intermixed color material and conductive material by an ink jet method; and

forming a conductive colored layer by drying and solidifying the discharged ink.

2. The method of manufacture of an active matrix substrate according to claim 1, wherein the second insulating layer is formed along the first electrode wire and the second electrode wire intersecting in a matrix form.

3. The method of manufacture of an active matrix substrate according to claim 1, wherein the conductive material is in a particulate form.

4. The method of manufacture of an active matrix substrate according to claim 3, wherein the particulate is in a plate or bar form.

5. The method of manufacture of an active matrix substrate according to claim 3, wherein the particulate has a hydrophobic surface.

6. A method of manufacture of a liquid crystal display device, comprising enclosing a liquid crystal layer between the active matrix substrate manufactured by the method of claim 1 and an opposing substrate being oppositely positioned to the active matrix substrate.

7. A method of manufacture of electronic equipment, comprising employing the liquid crystal display device manufactured by the method of claim 6 as display means.