Method of fabricating polarizing member, and method of fabricating liquid crystal display including polarizing member

Patent metadata

Field	Value
Publication number	US-9541789-B2
Application number	US-201514881937-A
Country	US
Kind code	B2
Filing date	Oct 13, 2015
Priority date	Oct 28, 2014
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A method of fabricating a polarizing member includes: sequentially disposing a metal layer and a preliminary pattern layer on a base substrate including a display area and a non-display area; forming a patterned resin layer on the preliminary pattern layer in the display area, the patterned resin layer including patterns formed on a surface of the patterned resin layer; surface-treating the preliminary pattern layer and the patterned resin layer; forming a mask pattern including a photoresist material on the preliminary pattern layer disposed in the non-display area; forming preliminary patterns on the preliminary pattern layer using the patterned resin layer; and forming a wire grid polarizing unit in the display area by etching the metal layer using the preliminary pattern and the mask pattern as a polarizing pattern.

First claim

What is claimed is:

1. A method of fabricating a polarizing member, comprising:
sequentially disposing a metal layer and a preliminary pattern layer on a base substrate comprising a display area and a non-display area;
forming a patterned resin layer on the preliminary pattern layer in the display area, the patterned resin layer comprising patterns formed on a surface of the patterned resin layer;
surface-treating the preliminary pattern layer and the patterned resin layer;
forming a mask pattern comprising a photoresist material on the preliminary pattern layer disposed in the non-display area;
forming preliminary patterns on the preliminary pattern layer using the patterned resin layer; and
forming a wire grid polarizing unit in the display area by etching the metal layer using the preliminary pattern and the mask pattern as a polarizing pattern.

2. The method of claim 1 , wherein sequentially disposing a metal layer and a preliminary pattern layer further comprises:
forming an adhesive layer on the preliminary pattern layer in the display area.

3. The method of claim 2 , wherein the surface-treating comprises one of an oxygen plasma treatment process and an ozone treatment process.

4. The method of claim 3 , wherein the surface-treating is configured to treat a surface of the patterned resin layer to be hydrophobic, and a surface of the preliminary pattern layer to be hydrophilic.

5. The method of claim 4 , wherein the mask pattern is disposed on the preliminary pattern layer according to surface properties of the patterned resin layer and the preliminary pattern layer.

6. The method of claim 5 , wherein the mask pattern comprises a photoresist material.

7. The method of claim 6 , wherein the forming the patterned resin layer comprises:
forming a resin layer on the adhesive layer and the preliminary pattern layer;
patterning the resin layer using an imprint mold comprising patterns inversely corresponding to the patterns on the resin layer;
hardening the resin layer; and
removing the imprint mold to form the patterned resin layer comprising the pattern on the adhesive layer.

8. The method of claim 7 , wherein the resin layer comprises one of fluorinated oligomer and fluorinated monomer.

9. The method of claim 8 , wherein hardening the resin layer comprises radiating the resin layer with ultraviolet rays or applying heat to the resin layer.

10. The method of claim 9 , wherein a first coupling force between the resin layer and the imprint mold is smaller than a second coupling force between the resin layer and the adhesive layer.

11. The method of claim 10 , wherein the first coupling force between the resin layer and the imprint mold is greater than a third coupling force between the resin layer and the preliminary pattern layer.

12. The method of claim 11 , wherein forming of the wire grid polarizing unit comprises dry etching the metal layer in the display area using the preliminary patterns and the mask pattern to form the wire grid polarizing unit comprising fine metal wires.

13. The method of claim 12 , further comprising:
removing the mask pattern.

14. The method of claim 1 , further comprising configuring the metal layer disposed in the non-display area as a reflection part.

15. A method of fabricating a liquid crystal display device, comprising:
disposing a first substrate comprising a first polarizing member, a signal wire, a thin film transistor, and a first electrode;
disposing a second substrate comprising a second polarizing member and a second electrode, facing the first substrate; and
disposing a liquid crystal layer between the first substrate and the second substrate, and bonding the liquid crystal layer, the first substrate, and the second substrate,
wherein the first polarizing member and a second polarizing member are formed by:
sequentially disposing a metal layer and a preliminary pattern layer on a base substrate comprising a display area and a non-display area;
forming a patterned resin layer on the preliminary pattern layer in the display area, the patterned resin layer comprising patterns formed on a surface of the patterned resin layer;
surface-treating the preliminary pattern layer and the patterned resin layer;
forming a mask pattern comprising a photoresist material on the preliminary pattern layer disposed in the non-display area;
forming preliminary patterns on the preliminary pattern layer using the patterned resin layer; and
forming a wire grid polarizing unit by etching the metal layer using the preliminary pattern and the mask pattern as a polarizing pattern.

16. The method of claim 15 , wherein sequentially disposing a metal layer and a preliminary pattern layer further comprises:
forming an adhesive layer on the preliminary pattern layer in the display area.

17. The method of claim 16 , wherein the surface-treating is configured to treat a surface of the patterned resin layer to be hydrophobic, and a surface of the preliminary pattern layer to be hydrophilic.

18. The method of claim 17 , wherein the forming the patterned resin layer comprises:
forming a resin layer on the adhesive layer and the preliminary pattern layer;
forming patterns on the resin layer using an imprint mold comprising patterns inversely corresponding to the pattern on the resin layer;
hardening the resin layer; and
removing the imprint mold to form the patterned resin layer comprising the pattern on the adhesive layer.

19. The method of claim 18 , wherein coupling force between the resin layer and the imprint mold is smaller than coupling force between the resin layer and the adhesive layer, and
coupling force between the resin layer and the imprint mold is greater than coupling force between the resin layer and the preliminary pattern layer.

20. The method of claim 19 , wherein the forming of the wire grid polarizing unit comprises dry etching the metal layer in the display area using the preliminary pattern and the mask pattern to form the wire grid polarizing unit comprising fine metal wires.

Assignees

• Samsung Display Co Ltd

Inventors

• Jang Dae-Hwan
• Han Kang-Soo
• Nam Jung-Gun
• Lee Dae-Young
• Jo Gug-Rae

Classifications

• G02F1/133528 Primary

  Polarisers · CPC title

• G02B5/3058

  comprising electrically conductive elements, e.g. wire grids, conductive particles · CPC title

• G02F2001/133548

  Physics · mapped topic

• G03F7/16

  Coating processes; Apparatus therefor (applying coatings to base materials in general B05; applying photosensitive compositions to base for photographic purposes G03C1/74) · CPC title

• H01L27/1288

  Electricity · mapped topic