DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF
According to one embodiment, a display device includes a lower electrode, a rib covering a part of the lower electrode and includes a pixel aperture overlapping the lower electrode, an upper electrode facing the lower electrode, and an organic layer between the lower and upper electrodes. The lower electrode includes a metal layer including a first peripheral portion covered with the rib, and a first central portion exposed from the rib through the pixel aperture, and a conductive oxide layer including a second peripheral portion located on the rib, and a second central portion which is in contact with the first central portion through the pixel aperture.
1 . A display device comprising:
a lower electrode;
a rib which covers a part of the lower electrode and comprises a pixel aperture overlapping the lower electrode;
an upper electrode which faces the lower electrode; and
an organic layer which is provided between the lower electrode and the upper electrode and emits light based on a potential difference between the lower electrode and the upper electrode, wherein
the lower electrode includes:
a metal layer comprising a first peripheral portion covered with the rib, and a first central portion exposed from the rib through the pixel aperture; and
a conductive oxide layer comprising a second peripheral portion located on the rib, and a second central portion which is in contact with the first central portion through the pixel aperture.
2 . The display device of claim 1 , further comprising a protective layer which covers the first peripheral portion.
3 . The display device of claim 2 , wherein
the rib covers the protective layer.
4 . The display device of claim 2 , wherein
the protective layer is thicker than the conductive oxide layer.
5 . The display device of claim 2 , wherein
the protective layer surrounds the first central portion.
6 . The display device of claim 2 , wherein
the protective layer is conductive.
7 . The display device of claim 6 , wherein
the conductive oxide layer and the protective layer are formed of ITO, IZO or IGZO.
8 . The display device of claim 1 , further comprising a conductive partition provided on the rib, wherein
the upper electrode is in contact with the partition.
9 . The display device of claim 8 , wherein
the partition comprises a conductive lower portion, and an upper portion which protrudes from a side surface of the lower portion.
10 . The display device of claim 9 , wherein
the conductive oxide layer is partly located on the upper portion.
11 . A display device comprising:
a lower electrode;
a rib which covers a part of the lower electrode and comprises a pixel aperture overlapping the lower electrode;
an upper electrode which faces the lower electrode;
an organic layer which is provided between the lower electrode and the upper electrode and emits light based on a potential difference between the lower electrode and the upper electrode; and
a protective layer located between the lower electrode and the rib, wherein
the lower electrode includes:
a metal layer comprising a first peripheral portion covered with the rib, and a first central portion exposed from the rib through the pixel aperture; and
a conductive oxide layer which covers the first central portion, and
the protective layer covers the first peripheral portion.
12 . The display device of claim 11 , wherein
the protective layer is thicker than the conductive oxide layer.
13 . The display device of claim 11 , wherein
the protective layer surrounds the first central portion.
14 . A manufacturing method of a display device, including:
forming a metal layer;
forming a protective layer which covers the metal layer;
forming a rib which covers a part of the protective layer and comprises a pixel aperture overlapping the protective layer;
removing, of the protective layer, a portion exposed from the rib through the pixel aperture such that a first central portion of the metal layer is exposed from the protective layer;
forming a conductive oxide layer which is in contact with the first central portion through the pixel aperture;
forming an organic layer which covers the conductive oxide layer; and
forming an upper electrode which covers the organic layer.
15 . The manufacturing method of claim 14 , wherein
the conductive oxide layer is formed so as to be thinner than the protective layer.
16 . The manufacturing method of claim 14 , further including
forming a partition on the rib before the first central portion of the metal layer is exposed from the protective layer, the partition comprising a conductive lower portion and an upper portion protruding from a side surface of the lower portion.