Organic light emitting display device and manufacturing method thereof

• US 8,299,705 B2
• Filed: 09/29/2006
• Issued: 10/30/2012
• Est. Priority Date: 01/26/2006
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Choi, Dong Soo
• Primary Examiner(s): Mai, Anh
• Assistant Examiner(s): COUGHLIN, ANDREW J
• Application Number:
  US11/529,995
• Publication Number:
  US 20070171637A1
• Time in Patent Office: 2,223 Days
• Field of Search: 313/512, 501/15
• US Class Current: 313/512
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

Disclosed is a manufacturing method of an organic light emitting display device, which allows a frit to be sufficiently fused by illuminating a laser beam such that a width of the laser beam may be above a width of the frit by adjusting power of the laser beam. The manufacturing method of an organic light emitting display device comprises the steps of: a) forming an organic light emitting element comprising a first electrode, an organic thin film and a second electrode on a pixel region of a first substrate divided into the pixel region and a non-pixel region; b) forming a flit along a surrounding of a second substrate corresponding to the non-pixel region; c) arranging the second substrate on an upper side of the first substrate to be superposed to a part of the pixel region and the non-pixel region; and d) attaching the first substrate and the second substrate by illuminating laser beam with a width above a width of the frit from a back surface of the second substrate.

Claims

1. An organic light emitting display device, comprising:

a first substrate;

a second substrate;

an array of organic light emitting pixels interposed between the first and second substrates; and

a frit seal comprising a plurality of elongated segments interposed between the first and second substrates, the plurality of elongated segments comprises a first segment;

wherein the plurality of elongated segments in combination surrounds the array, wherein the frit seal, the first substrate and the second substrate in combination enclose the array;

wherein the frit seal comprises a first cross-section taken in a plane perpendicular to an elongation of the first segment; and

wherein the fit seal is generally homogeneous in color or morphology throughout at least a predetermined first portion of the first cross-section, and

wherein the predetermined first portion of the first cross-section extends across a portion of the first cross-section and is distinct from a second portion of the first cross-section, the first portion having the same composition as the second portion;

wherein the first cross-section further comprises a third portion, the second portion having a uniform makeup and being interposed between the first and third portion, the second portion being distinct from the first and third portions.

2. The device of claim 1, wherein the first cross-section is generally homogeneous in color throughout.

3. The device of claim 1, wherein the first cross-section is generally homogeneous in morphology throughout.

4. The device of claim 1, wherein the frit seal comprising the first cross-section is formed by applying a laser beam to a fit seal material formed generally in the shape of the frit seal between the first and second substrates, and wherein the laser beam is applied to the fit seal material substantially throughout the first cross-section.

5. The device of claim 4, wherein the laser beam applied to the frit seal material is wider than the first cross-section.

6. The device of claim 5, wherein the laser beam has a width greater than the width of the first cross-section by about 0.6 mm to about 1.5 mm.

7. The device of claim 1, wherein the first and second portions are distinct in their darkness or color.

8. The device of claim 1, wherein the second portion comprises about 50% to about 80% of the total area of the first cross-section.

9. The device of claim 1, wherein the frit seal comprises a plurality of elongated segments, each elongated segment at one end thereof contacting another elongated segment extending in a different direction, and wherein a first one of the segment is substantially homogeneous throughout.

10. The device of claim 9, wherein the frit seal is substantially homogeneous throughout the plurality of segments.

11. The device of claim 1, wherein the frit seal comprises one or more materials selected from the group consisting of magnesium oxide (MgO), calcium oxide (CaO), barium oxide (BaO), lithium oxide (Li₂O), sodium oxide (Na₂O), potassium oxide (K₂O), boron oxide (B₂O₃), vanadium oxide (V₂O₅), zinc oxide (ZnO), tellurium oxide (TeO₂), aluminum oxide (Al₂O₃), silicon dioxide (SiO₂), lead oxide (PbO), tin oxide (SnO), phosphorous oxide (P₂O₅), ruthenium oxide (Ru₂O), rubidium oxide (Rb₂O), rhodium oxide (Rh₂O), ferrite oxide (Fe₂O₃), copper oxide (CuO), titanium oxide (TiO₂), tungsten oxide (WO₃), bismuth oxide (Bi₂O₃), antimony oxide (Sb₂O₃), lead-borate glass, tin-phosphate glass, vanadate glass, and borosilicate.

12. The device of claim 1, wherein the frit seal is cured at edges of the first cross-section.

13. The device of claim 1, wherein the first portion is integral to the second portion.