Granted Patent B2

US 12,230,192 · App. 18/240,624 · Granted Feb 18, 2025

Inventors: Jeongseok Lee (Yongin-si, KR); Wooyong Sung (Yongin-si, KR); Taewook Kang (Yongin-si, KR)

Assignee: SAMSUNG DISPLAY CO., LTD.

G09G3/32G09G3/2074G09G2300/02G09G2300/0413G09G2300/0426G09G2300/0456G09G2330/04

Abstract

Claims (43)

1. A display apparatus comprising:

a first sub-pixel electrode;

a metal bank layer in which a first opening overlapping the first sub-pixel electrode is defined, the metal bank layer including:

a first metal layer; and

a second metal layer on the first metal layer;

an insulating layer between an outer portion of the first sub-pixel electrode and the metal bank layer;

a first intermediate layer overlapping the first sub-pixel electrode through the first opening of the metal bank layer;

a first opposite electrode disposed on the first intermediate layer through the first opening of the metal bank layer; and

a low-reflective layer disposed on the second metal layer of the metal bank layer and having a reflectivity less than a reflectivity of the second metal layer, wherein the low-reflective layer includes a metal oxide and is disposed between an upper surface of the metal bank layer and a first dummy portion including a same material as a material of the first intermediate layer.

2. The display apparatus of claim 1 , wherein the low-reflective layer includes at least one of copper oxide (CuO), calcium oxide (CaO), molybdenum oxide (MoO x ), or zinc oxide (ZnO).

3. The display apparatus of claim 1 , wherein a portion of the second metal layer facing the first opening of the metal bank layer includes a tip extending from a point where a bottom surface of the second metal layer contacts a lateral surface of the first metal layer to the first opening.

4. The display apparatus of claim 3 , wherein a length from the point to a lateral surface of the tip is about 0.3 micrometer to about 1 micrometer.

5. The display apparatus of claim 1 , further comprising a protective layer disposed between the outer portion of the first sub-pixel electrode and the insulating layer.

6. The display apparatus of claim 5 , wherein the protective layer includes a transparent conductive oxide.

7. The display apparatus of claim 1 , wherein an outer portion of the first opposite electrode directly contacts a lateral surface of the first metal layer facing the first opening of the metal bank layer.

8. The display apparatus of claim 1 , further comprising a first dummy electrode portion including a same material as a material of the first opposite electrode and disposed on the first dummy portion.

9. The display apparatus of claim 8 , further comprising:

a second sub-pixel electrode adjacent to the first sub-pixel electrode;

a second intermediate layer overlapping the second sub-pixel electrode through a second opening of the metal bank layer; and

a second opposite electrode overlapping the second intermediate layer through the second opening of the metal bank layer.

10. The display apparatus of claim 9 , wherein a groove is defined in the metal bank layer between the first sub-pixel electrode and the second sub-pixel electrode, and

the groove is concave with respect to an upper surface of the metal bank layer.

11. The display apparatus of claim 10 , wherein the first dummy portion is provided in plural so that a plurality of first dummy portions is separated from each other with the groove therebetween.

12. A method of manufacturing a display apparatus, the method comprising:

forming a first sub-pixel electrode;

forming an insulating layer overlapping an outer portion of the first sub-pixel electrode;

forming a metal bank layer in which a first opening overlapping the first sub-pixel electrode is defined, the metal bank layer including:

a first metal layer; and

a second metal layer on the first metal layer;

forming a first intermediate layer overlapping the first sub-pixel electrode through the first opening of the metal bank layer;

forming a first opposite electrode disposed on the first intermediate layer through the first opening of the metal bank layer; and

forming a low-reflective layer disposed on the second metal layer of the metal bank layer and having a reflectivity less than a reflectivity of the second metal layer,

wherein the low-reflective layer includes a metal oxide and is disposed between an upper surface of the metal bank layer and a first dummy portion including a same material as a material of the first intermediate layer.

13. The method of claim 12 , wherein the low-reflective layer includes at least one of copper oxide (CuO), calcium oxide (CaO), molybdenum oxide (MoO x ), or zinc oxide (ZnO).

14. The method of claim 12 , wherein the forming the metal bank layer includes:

defining an opening in each of the first metal layer and the second metal layer, wherein the opening overlaps the first sub-pixel electrode; and

selectively etching the first metal layer, and

the second metal layer includes a tip extending from a point where a bottom surface of the second metal layer contacts a lateral surface of the first metal layer to the first opening.

15. The method of claim 12 , further comprising forming a protective layer disposed between the outer portion of the first sub-pixel electrode and the insulating layer and including a transparent conductive oxide.

16. The method of claim 12 , wherein the forming the first opposite electrode includes depositing the first opposite electrode such that an outer portion of the first opposite electrode directly contacts a lateral surface of the first metal layer facing the first opening of the metal bank layer.

17. The method of claim 12 , further comprising:

forming a second sub-pixel electrode adjacent to the first sub-pixel electrode; and

defining a groove in the metal bank layer, the groove being between the first sub-pixel electrode and the second sub-pixel electrode.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (11)