Electro-luminescent device and method for manufacturing the same
An electro-luminescent device includes a transparent substrate, a black matrix on the transparent substrate defining a plurality of spaces, a plurality of color representing layers each arranged in respective ones of the spaces, an overcoat layer on the black matrix and the color representing layers, a plurality of first electrodes disposed on the overcoat layer in a first direction with respect to the color representing layers, a phosphor layer formed on the plurality of first electrodes, an insulating film on the phosphor layer, and a plurality of second electrodes disposed on the insulating film in a second direction perpendicular to the first direction.
1 . An electro-luminescent device comprising:
a transparent substrate;
a black matrix on the transparent substrate defining a plurality of spaces;
a plurality of color representing layers each arranged in respective ones of the spaces;
an overcoat layer on the black matrix and the color representing layers;
a plurality of first electrodes disposed on the overcoat layer in a first direction with respect to the color representing layers;
a phosphor layer formed on the plurality of first electrodes;
an insulating film on the phosphor layer; and
a plurality of second electrodes disposed on the insulating film in a second direction perpendicular to the first direction.
2 . The electro-luminescent device according to claim 1 , further comprising first and second pad terminals on the overcoat layer respectively disposed at opposite sides of the plurality of first electrodes, the first electrodes and the first and second pad terminals being formed of the same material.
3 . The electro-luminescent device according to claim 1 , wherein the first electrodes are formed of a transparent metal.
4 . The electro-luminescent device according to claim 1 , wherein each of the first electrodes has a double-layer structure including a first metal film and a second metal film.
5 . The electro-luminescent device according to claim 4 , wherein the first metal film is a transparent metal film, and the second metal film is a molybdenum film.
6 . The electro-luminescent device according to claim 4 , wherein the second metal film is formed on a predetermined portion of the first metal film without completely covering the first metal film.
7 . The electro-luminescent device according to claim 4 , wherein the first metal film includes a material selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO).
8 . The electro-luminescent device according to claim 1 , further comprising first and second pad terminals on the overcoat layer respectively disposed at opposite sides of the plurality of first electrodes, each of the first and second pad terminals having a laminated structure of a transparent metal film and a molybdenum film.
9 . The electro-luminescent device according to claim 8 , wherein the molybdenum film is formed on an edge portion of the transparent metal film without completely covering the transparent metal film.
10 . The electro-luminescent device according to claim 1 , wherein the second electrodes are formed of Al—Ti.
11 . The electro-luminescent device according to claim 1 , wherein the second electrodes are formed of aluminum.
12 . The electro-luminescent device according to claim 1 , wherein the phosphor layer is a blue phosphor layer.
13 . The electro-luminescent device according to claim 1 , wherein each of the color representing layers includes a color filter layer.
14 . The electro-luminescent device according to claim 1 , wherein each of the color representing layers includes a color changing medium layer.
15 . The electro-luminescent device according to claim 1 , wherein the color representing layers are substantially flush with the black matrix layers.
16 . The electro-luminescent device according to claim 1 , wherein each of the color representing layers overlaps facing ends of adjacent portions of the black matrix associated with the color representing layer.
17 . The electro-luminescent device according to claim 1 , wherein the black matrix is formed of a thin film of chromium or a carbon-based organic material.
18 . A method for manufacturing an electro-luminescent device, comprising the steps of:
forming a black matrix on a transparent substrate, the black matrix defining a plurality of spaces;
forming color representing layers each arranged in respective ones of the spaces;
forming an overcoat layer over an entire surface of the transparent substrate including the color representing layers;
forming a plurality of first electrodes on the overcoat layer on the overcoat layer in a first direction with respect to the color representing layers;
forming a phosphor layer on the plurality of first electrodes;
forming an insulating film on the phosphor layer; and
forming a plurality of second electrodes on the insulating film in a second direction perpendicular to the first direction.
19 . The method according to claim 18 , wherein the color representing layers are formed using a method selected from the group consisting of a dyeing method, a printing method, an electro-deposition method, a pigment-dispersion method, and a film transfer method.
20 . The method according to claim 18 , wherein the color representing layers are substantially flush with the black matrices.
21 . The method according to claim 18 , wherein the first electrodes are formed using a shadow mask of a transparent metal selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO).
22 . The method according to claim 18 , wherein the step of forming the first electrodes includes depositing a transparent metal film over the transparent substrate and selectively removing the transparent metal film using a photolithography process.
23 . The method according to claim 18 , wherein the step of forming the first electrodes includes depositing a transparent metal film over the transparent substrate and selectively removing the transparent metal film using a laser ablation technique.
24 . The method according to claim 18 , wherein the phosphor layer is formed using a spin coating method or a printing method.
25 . The method according to claim 18 , wherein the insulating film is formed using a printing method.
26 . The method according to claim 18 , wherein the step of forming the second electrodes includes depositing a metal film having a laminated Al/Ti film structure and selectively removing the metal film using a photolithography process.
27 . The method according to claim 26 , wherein the selective removal of the metal film is includes a wet etching process.
28 . The method according to claim 18 , wherein the second electrodes are formed by a printing method using a shadow mask.
29 . The method according to claim 18 , wherein the second electrodes include aluminum or silver.
30 . The method according to claim 18 , wherein each of the color representing layers comprises one of a color filter layer and a color changing medium layer.
31 . The method according to claim 18 , wherein the phosphor layer comprises a blue phosphor layer.
32 . The method according to claim 18 , wherein the step of forming the plurality of first electrodes includes forming first and second pad terminals on the overcoat layer respectively disposed at opposite sides of a region where the first electrodes are arranged, the first and second pad terminals being formed simultaneously with the first electrodes.
33 . A method for manufacturing an electro-luminescent device, comprising the steps of:
forming a black matrix on a transparent substrate, the black matrix defining a plurality of spaces;
forming color representing layers each arranged in respective ones of the spaces;
forming an overcoat layer over an entire surface of the transparent substrate including the color representing layers;
forming a plurality of first electrodes on the overcoat layer in a first direction with respect to the color representing layers, each of the first electrodes having a double-layer structure including a first metal film and a second metal film;
forming first and second pad terminals on the overcoat layer respectively disposed at regions opposite where the first electrodes are arranged such that the first and second pad terminals are spaced from the region where the first electrodes are arranged;
forming a phosphor layer on the first electrodes;
forming an insulating film on the phosphor layer and portions of the first and second pad terminals; and
forming a plurality of second electrodes on the insulating film connected to the first pad terminal such that the second electrodes are uniformly spaced apart from one another in a second direction perpendicular to the first direction.
34 . The method according to claim 33 , wherein the black matrix includes a thin film of chromium or a carbon-based organic material.
35 . The method according to claim 33 , wherein the first electrodes and the first and second pad electrodes are simultaneously formed.
36 . The method according to claim 33 , wherein the step of forming the first electrodes comprises the steps of:
sequentially forming a transparent metal film and a molybdenum film over the overcoat layer;
forming a patterned photoresist mask by coating a photoresist over the molybdenum film, patterning the photoresist using diffraction exposure, and applying a developing processes to the exposed photoresist;
selectively removing the molybdenum film and the transparent metal film using the patterned photoresist as a mask to form the first electrodes spaced apart from one another in the first direction;
ashing the remaining photoresist;
selectively removing the molybdenum film formed on the transparent metal film in each of the first electrodes to expose a portion of the transparent metal film; and
removing the photoresist.
37 . The method according to claim 36 , wherein the step of selectively removing the molybdenum film includes a dry etching process.
38 . The method according to claim 33 , wherein the phosphor layer is formed using a spin coating method or a printing method.
39 . The method according to claim 33 , wherein the insulating film is formed using a printing method.
40 . The method according to claim 33 , wherein the second electrodes are formed using a printing method with a shadow mask.
41 . The method according to claim 33 , wherein the step of forming second electrodes includes depositing an aluminum film, and selectively removing the aluminum film using a wet etching process with a portion of the aluminum film being masked.
42 . The method according to claim 33 , wherein each of the color representing layers comprises a color filter layer.
43 . The method according to claim 33 , wherein each of the color representing layers comprises a color changing medium layer.
44 . The method according to claim 33 , wherein the phosphor layer comprises a blue phosphor layer.