Display device and method for manufacturing the same

• US 10,504,849 B2
• Filed: 12/22/2014
• Issued: 12/10/2019
• Est. Priority Date: 12/24/2013
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Youk, Seung-Hyun, Yoo, Soon-Sung, Kim, Chul-Ho, Kim, Nam-Kook
• Primary Examiner(s): Walshon, Scott R.
• Assistant Examiner(s): Reddy, Sathavaram I
• Application Number:
  US14/579,494
• Publication Number:
  US 20150179586A1
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133354 Arrangements for aligning or assembling substrates
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: H01L 2223/54426 for alignment
• CPC Class Codes: H01L 2223/54486 Located on package parts, e.g. encapsulation, leads, package substrate
• CPC Class Codes: H01L 23/544 Marks applied to semiconductor devices or parts, e.g. registration marks, alignment structures, wafer maps test patterns for characterising or monitoring manufacturing processes H01L22/00
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Abstract

Disclosed is a method for forming a display device. The method includes forming an alignment mark on a front surface of a substrate having a display region and a non-display region surrounding the display region, forming an alignment protection pattern on a rear surface of the substrate such that the alignment protection pattern overlaps the alignment mark, and forming a light-shielding member in the non-display region on the rear surface of the substrate such that the light-shielding member forms a boundary with the alignment protection pattern.

Claims

1. A display device comprising:

a substrate having a display region and a non-display region surrounding the display region;

an alignment mark formed in the non-display region on a front surface of the substrate;

a light-shielding member formed in the non-display region on a rear surface of the substrate; and

a plurality of alignment protection patterns formed on the rear surface of the substrate,

wherein one of the alignment protection patterns overlaps the alignment mark, forms a boundary with the light-shielding member and does not overlap with the light-shielding member, and

wherein the light-shielding member is disposed between the plurality of alignment protection patterns, and encloses and borders an entire edge of each alignment protection pattern having an island shape.

2. The display device according to claim 1, wherein any one of the alignment protection patterns and the light-shielding member is formed of a hydrophilic material and the other is formed of a hydrophobic material.

3. The display device according to claim 2, wherein the hydrophilic material comprises a substance having a terminal group selected from —

OH, —

CO₂H (carboxyl group), —

NH₂ (amino group), —

SH (thiol group) and —

CONH₂ (amide group), and

the hydrophobic material comprises a substance having a terminal group selected from —

Cl, —

F, —

CH₃ (alkyl group), and —

C₆H₅ (phenyl group).

4. The display device according to claim 1, further comprising an optical film adhered to the rear surface of the substrate, based on the alignment mark.

5. The display device according to claim 1, further comprising outer signal lines, which provide driving signals to gate lines and data lines in the display region, in the non-display region on the front surface of the substrate.

6. The display device according to claim 5, wherein the alignment mark is formed of a same material as one of the gate lines and the data lines in the display region.

7. The display device according to claim 1, wherein the alignment protection patterns overlap the alignment mark, with the non-display region of the substrate therebetween.

8. The display device according to claim 5, wherein the light-shielding member overlaps the outer signal lines outside the alignment mark, with the non-display region of the substrate therebetween.

9. The display device according to claim 1, wherein the light-shielding member is in contact with an entire edge of each alignment protection pattern having the island shape in the non-display region.