Wire grid polarizer and fabrication method thereof, and display device

• US 9,897,735 B2
• Filed: 03/04/2015
• Issued: 02/20/2018
• Est. Priority Date: 10/17/2014
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Li, Yingyi, Wu, Yanbing
• Primary Examiner(s): FONT, FRANK G
• Application Number:
  US15/324,392
• Publication Number:
  US 20170205551A1
• Time in Patent Office: 1,084 Days
• Field of Search: 35948505, 35948703, 349 96
• CPC Class Codes: B29D 11/00644 polarizing
• CPC Class Codes: B29K 2001/12 Cellulose acetate
• CPC Class Codes: B29K 2067/003 PET, i.e. poylethylene terephthalate
• CPC Class Codes: G02B 5/3058 comprising electrically conductive elements, e.g. wire grids, conductive particles
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133548 Wire-grid polarisers

Abstract

A wire grid polarizer (20) and a fabrication method thereof,and a display device are provided. The fabrication method of the wire grid polarizer (20) includes: applying a mixture (100) including a polymeric monomer (101) and a metal particle (102) on a surface of a base substrate (01); performing a curing treatment on the mixture (100) at a predetermined position; and forming a wire grid pattern including protrusions (110) arranged at intervals on the surface of the base substrate (01). Problems of a complicated process, great difficulty and high cost in a fabrication process of the wire grid polarizer (20) are solved.

Claims

1. A fabrication method of a wire grid polarizer, comprising:

applying a mixture including a polymeric monomer and a metal particle on a surface of a base substrate;

performing a curing treatment on the mixture at a predetermined position; and

forming a wire grid pattern including protrusions arranged at intervals on the surface of the base substrate.

2. The fabrication method of the wire grid polarizer according to claim 1, wherein after the applying the mixture including the polymeric monomer and the metal particle on the surface of the base substrate, the method further comprises:

providing a mask on a surface of the mixture, and exposing a portion of the mixture corresponding to a light-transmissive region of the mask; and

removing a portion of the mixture corresponding to a light-shielding region of the mask.

3. The fabrication method of the wire grid polarizer according to claim 1, wherein after the applying the mixture including the polymeric monomer and the metal particle on the surface of the base substrate, the method further comprises:

stamping a stamping die into the mixture so that the stamping die contacts the base substrate;

irradiating the mixture in the stamping die; and

separating the stamping die from the mixture and from the base substrate.

4. The fabrication method of the wire grid polarizer according to claim 3, wherein, the stamping die is made of a transparent material.

5. The fabrication method of the wire grid polarizer according to claim 1, wherein, the polymeric monomer includes an acrylic monomer.

6. The fabrication method of the wire grid polarizer according to claim 1, wherein, the metal particle includes at least one or a combination of several of an aluminum particle, an aluminum alloy particle, a copper particle and an iron particle.

7. The fabrication method of the wire grid polarizer according to claim 1, wherein, a period of the protrusions is less than or equal to a half of a wavelength of an incident light, and the period is a distance between centers of two adjacent protrusions.

8. The fabrication method of the wire grid polarizer according to claim 7, wherein, the period of the protrusion is less than or equal to 100 nm.

9. The fabrication method of the wire grid polarizer according to claim 1, wherein, a width of the protrusion is less than or equal to 50 nm.

10. The fabrication method of the wire grid polarizer according to claim 1, wherein, a thickness of the protrusion is 20 nm to 100 nm.

11. The fabrication method of the wire grid polarizer according to claim 1, wherein, a material constituting the base substrate includes at least one of glass and quartz, or at least one of polyethylene terephthalate and cellulose triacetate.