Display device and method for manufacturing the same
A display device including a substrate, a source electrode and a drain electrode on the substrate, the source electrode and the drain electrode being spaced apart from each other, a first planarization layer on the source electrode and the drain electrode, a second planarization layer on the first planarization layer, and a first electrode on the second planarization layer. A step difference between a top of the first planarization layer and a top of the drain electrode is 100 Å or less.
1. A display device, comprising:
a substrate;
a source electrode and a drain electrode on the substrate, the source electrode and the drain electrode being spaced apart from each other;
a first planarization layer on the source electrode and the drain electrode, and including a first organic material;
a second planarization layer directly on the first planarization layer, and including a second organic material; and
a first electrode on the second planarization layer,
wherein:
a step difference between a top of the first planarization layer and a top of the drain electrode is 100 Å or less,
the first planarization layer is between the second planarization layer and the source electrode and the drain electrode, and
the second planarization layer is between the first planarization layer and the first electrode.
2. The display device as claimed in claim 1 , wherein a step difference between highest and lowest portions in an upper surface of the first electrode is 70 nm or less.
3. The display device as claimed in claim 1 , wherein the first planarization layer includes one or more selected from a polyimide, a polyacryl, and a polysiloxane.
4. The display device as claimed in claim 1 , wherein the first planarization layer has a thickness of 0.8 μm.
5. The display device as claimed in claim 1 , wherein the first planarization layer includes black pigment.
6. The display device as claimed in claim 5 , wherein the black pigment includes black carbon.
7. The display device as claimed in claim 1 , wherein the second planarization layer includes black pigment.
8. A display device, comprising:
a substrate;
a source electrode and a drain electrode on the substrate, the source electrode and the drain electrode being spaced apart from each other;
a first planarization layer on the source electrode and the drain electrode, and including a first organic material;
a second planarization layer directly on the first planarization layer, and including a second organic material;
a first electrode on the second planarization layer; and
a black matrix on the first electrode,
wherein:
the first planarization layer is between the second planarization layer and the source electrode and the drain electrode, and
the second planarization layer is between the first planarization layer and the first electrode.
9. The display device as claimed in claim 8 , further comprising an encapsulation layer on the first electrode, wherein the black matrix is on the encapsulation layer.
10. The display device as claimed in claim 9 , further comprising a color filter on the encapsulation layer.
11. The display device as claimed in claim 8 , further comprising a second electrode facing the first electrode, and a cover layer on the second electrode.
12. The display device as claimed in claim 11 , wherein the cover layer includes manganese.
13. The display device as claimed in claim 8 , wherein a step difference between a top of the first planarization layer and a top of the drain electrode is 100 Å or less.
14. The display device as claimed in claim 8 , wherein the first planarization layer includes a black pigment.
15. The display device as claimed in claim 14 , wherein the black pigment includes black carbon.
16. The display device as claimed in claim 8 , wherein the second planarization layer includes a black pigment.
17. A method for manufacturing a display device, the method comprising:
preparing a substrate on which a source electrode and a drain electrode are disposed and spaced apart from each other;
forming a first planarization layer that includes a first organic material on the source electrode and the drain electrode such that a step difference between a top of the first planarization layer and a top of the drain electrode is 100 Å or less;
forming a second planarization layer that includes a second organic material directly on the first planarization layer; and
forming a first electrode on the second planarization layer,
wherein:
the first planarization layer is disposed between the second planarization layer and the source electrode and the drain electrode, and
the second planarization layer is disposed between the first planarization layer and the first electrode.
18. The method as claimed in claim 17 , wherein a step difference in a highest portion and a lowest portion of an upper surface of the first electrode is 70 nm or less.
19. The method as claimed in claim 17 , wherein the first planarization layer includes a black pigment.