Organic electroluminescent device and method of manufacturing the same

• US 6,850,006 B2
• Filed: 05/22/2002
• Issued: 02/01/2005
• Est. Priority Date: 10/26/2001
• Status: Expired due to Term

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung NEC Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Kyung Han, Kim, Tae Seung, Kim, Seon Hee
• Primary Examiner(s): Patel, Nimeshkumar D.
• Assistant Examiner(s): Leurig, Sharlene
• Application Number:
  US10/152,339
• Publication Number:
  US 20030080678A1
• Time in Patent Office: 986 Days
• Field of Search: 313/512, 313/498, 313/504, 313/506
• US Class Current: 313/512
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays

Abstract

An organic electroluminescent device and a method of manufacturing the same are provided. The organic electroluminescent device includes: a transparent substrate; a first electrode layer including a series of first electrode lines formed on the top surface of the substrate as a predetermined pattern and connected to first electrode pad portions at opposite edges of the substrate; an organic layer formed as a predetermined pattern on the first electrode lines; a second electrode layer including a series of second electrode lines formed on the substrate, on which the first electrode lines and the organic layer are formed, as a predetermined pattern to be insulated from the first electrode lines and connected to second electrode pad portions at the other edges of the substrate; a cap bonded to the substrate using a sealant to seal the organic layer within its inner sealing space; and a barrier portion which blocks the flow of the sealant on the substrate inwards or outwards the sealing space.

Claims

1. An organic electroluminescent device comprising:

a substrate which is transparent;

a first electrode layer including a series at first electrode lines formed on the top surface of said substrate as a predetermined pattern and connected to first electrode pad portions at two opposite edges of said substrate;

an organic layer formed as a predetermined pattern on the first electrode lines;

a second electrode layer including a series of second electrode lines formed on said organic layer as a predetertermined pattern to be insulated from said first electrode lines and connected to second electrode pad portions at the other two edges of said substrate;

a cap bonded to said substrate using a sealant to seal said organic layer within an inner sealing space;

end

a barrier portion which blocks the flow of said sealant on said substrate inwards or outwards of said sealing space,

wherein said barrier portion comprises at least one protrusion from each of said first and second electrode pad portions.

2. The organic electroluminescent device according to claim 1, wherein said at least one protrusion protrudes from each of said first and second electrode pad portions in a staggered fashion.

3. The organic electroluminescent device according to claim 2, wherein said at least one protrusion protrudes from each of said first and second electrode pad portions on both sides of a bonding site of said substrate on which said sealant is appllied.

4. An organic electroluminescent device comprising:

a substrate which is transparent;

a first electrode layer including a series of first electrode lines formed on the top surface of said substrate as a predetermined pattern and connected to first electrode pad portions at two opposite edges of said substrate;

an organic layer formed as a predetermined pattern on the first electrode lines;

a second electrode layer including a series of second electrode lines formed on said organic layer as a predetermined pattern to be insulated from said first electrode lines and connected to second electrode pad portions at the other two edges of said substrate;

a cap bonded to said substrate using a sealant to seal said organic layer within an inner sealing space; and

a barrier portion which blocks the flow of said sealant on said substrate inwards or outwards of said sealing space,

wherein;

said barrier portion further comprises an extension between each of said first and second electrode pad portions located at the edges of said substrate and to be electrically connected to a flexible printed circuit board, and

said barrier portion further comprises an auxilary barrier portion along the edge of said substrate to coat the ends of said first and second electrode pad portions.

5. The organic electroluminescent device according to claim 4, wherein said barrier portion is formed outwards and adjacent to a bonding site of said substrate to have a height greater than said first and second electrode pad portions.

6. An organic electroluminescent device comprising:

a substrate which is transparent;

an organic emission portion including a first electrode layer having a series of first electrode lines formed on a top surface of said substrate as a predetermined pattern and connected to first electrode pad portions at two opposite edges of said substrate, an organic layer formed as a predetermined pattern on said first electrode lines, a second electrode layer having a series of second electrode lines formed on said organic layer as a predetermined pattern to be insulated from said first electrode lines and connected to second electrode pad portions at two other edges of said substrate;

a sealing layer which covers only said organic emission portion entirely to seal said organic layer from an outer environment but uncovers said first and second electrode pad portions located at the edges of said substrate;

a flexible printed circuit board which supplies a predetermined current to said series of first and second electrode lines in connection with said first and second electrode pad portions located at the edges of said substrate; and

a barrier portion which covers a portion of said first and second electrode pad portions exposed when bonded to said flexible printed circuit board.

7. The organic electroluminescent device according to claim 6, wherein said barrier portion is formed on said substrate as a closed loop along the boundary of said sealing layer.

8. The organic electroluminescent device according to claim 6, wherein said barrier portion comprises an extension between each of said first and second electrode pad portions located at the edges of said substrate and electrically connected to said flexible printed circuit board.

10. The organic electroluminescent device according to claim 6, further comprising a cap boded to said substrate to cover said sealing layer.

11. The organic electroluminescent device according to claim 6, further comprising an internal insulation layer formed on said substrate as a predetermined pattern to divide said first electrode lines.

12. The organic electroluminescent device according to claim 11, further comprising a separator layer with tapered walls formed on said internal insulation layer to define separate regions of said second electrode lines, and intersects said first electrode lines.

13. The organic electroluminescent device according to claim 6, wherein said organic layer is deposited on an exposed portion of said first electrode lines.

9. An organic electroluminescent device comprising:

a substrate which is transparent;

an organic emission portion including a first electrode layer having a series of first electrode lines formed on a top surface of said substrate as a predetermined pattern and connected to first electrode pad portions at two opposite edges of said substrate, an organic layer formed as a predetermined pattern on said first electrode lines, a second electrode layer having a series of second electrode lines formed on said organic layer as a predetermined pattern to be insulated from said first electrode lines and connected to second electrode pad portions at two other edges of said substrate;

a sealing layer which covers only said organic emission portion but uncovers said first and second electrode pad portions located at the edges of said substrate;

a flexible printed circuit board which supplies a predetermined current to said series of first and second electrode lines in connection with said first and second electrode pad portions located at the edges of said substrate; and

a barrier portion which covers a portion of said first and second electrode pad portions exposed when bonded to said flexible printed circuit board,

wherein;

said barrier portion comprises an extension between each of said first and second electrode pad portions located at the edges of said substrate and electrically connected to said flexible printed circuit board, and

said barrier portion further comprises an auxiliary barrier portion along the edges of said substrate to coat the ends of said first and second electrode pad portions.