DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF
20220208802 · 2022-06-30
Assignee
Inventors
Cpc classification
G03F7/2051
PHYSICS
G03F7/162
PHYSICS
G03F7/0002
PHYSICS
H01L27/1248
ELECTRICITY
H01L33/0095
ELECTRICITY
G03F7/203
PHYSICS
H01L25/167
ELECTRICITY
International classification
H01L27/12
ELECTRICITY
G03F7/00
PHYSICS
H01L21/311
ELECTRICITY
Abstract
A display device and a manufacturing method thereof are provided. The display device includes a display area and a non-display area. The display device includes a substrate, an element layer, an electrode pattern layer, a photoresist pattern layer, and a light-emitting element. The element layer is disposed on the substrate. The electrode pattern layer is disposed on the element layer, and the electrode pattern layer includes multiple electrodes. The photoresist pattern layer is disposed on the electrode pattern layer, and the photoresist pattern layer includes a first photoresist pattern disposed corresponding to the display area and corresponding to the electrodes; a second photoresist pattern disposed corresponding to the non-display area and between the electrodes. The light-emitting element is disposed on the photoresist pattern layer and is electrically connected to the electrodes of the electrode pattern layer.
Claims
1. A display device, comprising a display area and a non-display area, wherein the display device comprises: a substrate; an element layer disposed on the substrate; an electrode pattern layer disposed on the element layer, wherein the electrode pattern layer comprises a plurality of electrodes; a photoresist pattern layer disposed on the electrode pattern layer and comprising: a first photoresist pattern disposed corresponding to the display area and corresponding to the plurality of the electrodes, and a second photoresist pattern disposed corresponding to the non-display area and between the plurality of the electrodes; and at least one light-emitting element disposed on the photoresist pattern layer and electrically connected to the plurality of the electrodes of the electrode pattern layer.
2. The electronic device according to claim 1, wherein a height of the first photoresist pattern is equal to a height of the second photoresist pattern, and the light-emitting element is disposed on a plane of the photoresist pattern layer formed by the first photoresist pattern and the second photoresist pattern.
3. The electronic device according to claim 1, wherein the photoresist pattern layer comprises an opening to expose the plurality of the electrodes of the electrode pattern layer, and the light-emitting element is electrically connected to the plurality of the electrodes of the electrode pattern layer through the opening.
4. The electronic device according to claim 1, wherein transmittance of a visible light region of the first photoresist pattern ranges from 25% to 100%.
5. The electronic device according to claim 1, wherein reflectivity of a visible light region of the first photoresist pattern is less than or equal to 20%.
6. The electronic device according to claim 1, wherein transmittance of a visible light region of the second photoresist pattern ranges from 0% to 40%.
7. The electronic device according to claim 1, wherein reflectivity of a visible light region of the second photoresist pattern is less than or equal to 15%.
8. The electronic device according to claim 1, wherein the light-emitting element comprises a micro light-emitting diode (Micro LED) or a sub-millimeter light-emitting diode (Mini LED).
9. The electronic device according to claim 1, wherein a material of the photoresist pattern layer is selected from ionomer resin, thermally sensitive resin, thermosetting resin, hydrocarbon resin, acrylonitrile butadiene styrene resin, acrylic resin, fluorocarbon resin, acetal resin, epoxide resin, ion exchange resin, ionic polymer, amino resin, furfural resin, furfural phenol resin, phenolic resin, phenol ether resin, urea-formaldehyde resin, urea resin, carbamide resin, polyvinyl chloride, polyethylene terephthlate, polyamide, ethylene-vinyl alcohol copolymer, ethylene-propylene copolymer, ethylene-tetrafluoroethylene copolymer, melamine-phenol-formaldehyde resin, and combinations thereof.
10. A manufacturing method of a display device, wherein the display device comprises a display area and a non-display area, and the manufacturing method of the display device comprises: disposing a substrate; forming an element layer on the substrate; forming an electrode pattern layer on the element layer, wherein the electrode pattern layer comprises a plurality of electrodes; forming a photoresist layer on the electrode pattern layer; providing first energy to the photoresist layer corresponding to the display area to form a first photoresist pattern, wherein the first photoresist pattern is formed corresponding to the plurality of the electrodes; providing second energy to the photoresist layer corresponding to the non-display area to form a second photoresist pattern, wherein the second photoresist pattern is formed between the plurality of the electrodes, and the first photoresist pattern and the second photoresist pattern form a photoresist pattern layer; and disposing a light-emitting element on the photoresist pattern layer, wherein the light-emitting element is electrically connected to the plurality of the electrodes of the electrode pattern layer.
11. The manufacturing method of the display device according to claim 10, wherein a first laser with the first energy is disposed, the photoresist layer is scanned to form the first photoresist pattern, and an energy range of the first laser ranges from 20 J/g to 400 J/g; and a second laser with the second energy is disposed, the photoresist layer is scanned to form the second photoresist pattern, and an energy range of the second laser ranges from 300 J/g to 100 J/g.
12. The manufacturing method of the display device according to claim 10, wherein a first imprinting device with the first energy is disposed, the photoresist layer is imprinted to form the first photoresist pattern, and a temperature of the first imprinting device ranges from 120° C. to 200°; and a second imprinting device with the second energy is disposed, the photoresist layer is imprinted to form the second photoresist pattern, and a temperature of the second imprinting device ranges from 150° C. to 300°.
13. The manufacturing method of the display device according to claim 12, further comprising: performing a baking process on the photoresist layer, wherein a temperature of the baking process ranges from 80° C. to 110° C.; and imprinting the photoresist layer through the first imprinting device and imprinting the photoresist layer through the second imprinting device after the baking process.
14. The manufacturing method of the display device according to claim 10, wherein a height of the first photoresist pattern is equal to a height of the second photoresist pattern, and the light-emitting element is disposed on a plane of the photoresist pattern layer formed by the first photoresist pattern and the second photoresist pattern.
15. The manufacturing method of the display device according to claim 10, further comprising: providing a developer to remove part of the photoresist layer and to form an opening to expose the plurality of the electrodes of the electrode pattern layer, wherein the light-emitting element is electrically connected to the plurality of the electrodes of the electrode pattern layer through the opening.
16. The manufacturing method of the display device according to claim 10, wherein transmittance of a visible light region of the first photoresist pattern ranges from 25% to 100%.
17. The manufacturing method of the display device according to claim 10, wherein reflectivity of a visible light region of the first photoresist pattern is less than or equal to 20%.
18. The manufacturing method of the display device according to claim 10, wherein transmittance of a visible light region of the second photoresist pattern ranges from 0% to 40%.
19. The manufacturing method of the display device according to claim 10, wherein reflectivity of a visible light region of the second photoresist pattern is less than or equal to 15%.
20. The manufacturing method of the display device according to claim 10, wherein a material of the photoresist pattern layer is selected from ionomer resin, thermally sensitive resin, thermosetting resin, hydrocarbon resin, acrylonitrile butadiene styrene resin, acrylic resin, fluorocarbon resin, acetal resin, epoxide resin, ion exchange resin, ionic polymer, amino resin, furfural resin, furfural phenol resin, phenolic resin, phenol ether resin, urea-formaldehyde resin, urea resin, carbamide resin, polyvinyl chloride, polyethylene terephthlate, polyamide, ethylene-vinyl alcohol copolymer, ethylene-propylene copolymer, ethylene-tetrafluoroethylene copolymer, melamine-phenol-formaldehyde resin, and combinations thereof.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0030]
[0031]
[0032]
[0033]
[0034]
DESCRIPTION OF THE EMBODIMENTS
[0035]
[0036] Referring to
[0037] The non-display area 104 of the display device 100 usually corresponds to a position where metal traces (not shown) are disposed. The metal traces are adapted to electrically connect multiple light-emitting elements 150 in the display area 102 and to drive the driving chips (not shown) of the light-emitting elements 150. Since the second photoresist pattern 144 is disposed in the non-display area 104 of the display device 100, the metal traces may be shielded to reduce the high reflectivity of the metal traces, and the appearance of the display device 100 may be close to the aesthetic taste of dark appearance.
[0038] The material of the substrate 110 may include glass, quartz, or other suitable materials. The element layer 120 may include multiple active elements (not shown), such as a thin film transistor. The active element in the element layer 120 may be served as a switch and electrically connected to the pin 152 of the light-emitting element 150 through the electrode 132 of the electrode pattern layer 130, thereby controlling the on or off of the light-emitting element 150. The type or the quantity of circuit elements disposed in the element layer 120 may be selected according to design requirements, which is not limited thereto in the embodiments of the disclosure.
[0039] Referring to
[0040] Moreover, high energy or a high temperature may also be provided to the low-reflective resist, so the low-reflective resist undergoes a high degree of polymerization reaction, and the second photoresist pattern 144 (having lower transmittance and lower reflectivity) is formed in a position corresponding to the non-display area 104. In an embodiment, the transmittance of the visible light region of the second photoresist pattern 144 may range from 0% to 40%; and the reflectivity of the visible light region of the second photoresist pattern 144 may be less than or equal to 15%. Accordingly, the second photoresist pattern 144 disposed in the non-display area 104 may be served as a black matrix to shield the metal traces (not shown) in the non-display area 104, the light reflected by the metal traces in the non-display area 104 may be reduced to provide a display screen with good contrast, and this makes it possible for the appearance of the display device 100 to come with the good aesthetic taste of dark appearance.
[0041] Referring to
[0042] Referring to
[0043] In an embodiment of the disclosure, the material of the photoresist pattern layer 140A is selected from ionomer resin, thermally sensitive resin, thermosetting resin, hydrocarbon resin, acrylonitrile butadiene styrene resin, acrylic resin, fluorocarbon resin, acetal resin, epoxide resin, ion exchange resin, ionic polymer, amino resin, furfural resin, furfural phenol resin, phenolic resin, phenol ether resin, urea-formaldehyde resin, urea resin, carbamide resin, polyvinyl chloride, polyethylene terephthlate, polyamide, ethylene-vinyl alcohol copolymer, ethylene-propylene copolymer, ethylene-tetrafluoroethylene copolymer, melamine-phenol-formaldehyde resin, and combinations thereof.
[0044] In the display device 100 of an embodiment in the disclosure, the multiple low-reflective resist materials can be adopted to form a uniform film layer with a flat topography, adapted for carrying multiple light-emitting elements 150 (e.g. Micro LEDs or Mini LEDs). Moreover, by providing different regions of the uniform film layer with different levels of energy, the photoresist pattern layer 140A having different transmittance and reflectivity may be processed in different regions. Subsequently, a manufacturing method of the display device 100 according to an embodiment of the disclosure is illustrated.
[0045]
[0046] First, referring to
[0047] Next, referring to
[0048] Next, referring to
[0049] Next, referring to
[0050] Referring to
[0051] Subsequently, referring to
[0052] The whole manufacturing process can be performed in an Array Fab; in other words, the manufacturing process processes the photoresist pattern layer 140A with the low-reflective resist without a transfer to the color filter fab, so the cost can be saved. Moreover, since there is no need to adopt black metal, no effect of parasitic capacitance is caused, and no photomask process is required.
[0053]
[0054] First, referring to
[0055] Next, referring to
[0056] Next, referring to
[0057] Next, referring to
[0058] In the embodiment of
[0059]
[0060] First, referring to
[0061] Referring to
[0062] Next, referring to
[0063] Next, referring to
[0064] Next, referring to
[0065] In another embodiment, the first imprinting device 502 as shown in
[0066] In the embodiment of
[0067] Based on the above, the display device of the embodiments in the disclosure has the flat photoresist pattern layer 140A, so the light-emitting element 150 can be stably held on the photoresist pattern layer 140A. When the mass transferring process and the bonding process are performed on the multiple light-emitting elements 150, the yield of the electrical connection between the light-emitting elements 150 and the electrodes 132 may be improved.
[0068] Moreover, the manufacturing method of the display device of the embodiments in the disclosure can be adopted to process the photoresist pattern layer 140A in the array fab. That is, the photoresist pattern layer 140A can be processed without the transfer to the color filter fab, so the cost is saved. In addition, since black metal is not required, no effect of parasitic capacitance is caused, and the photomask process can be omitted.
[0069] Although the disclosure has been described with reference to the above embodiments, they are not intended to limit the disclosure. It will be apparent to one of ordinary skill in the art that modifications and changes to the described embodiments may be made without departing from the spirit and the scope of the disclosure. Accordingly, the scope of the disclosure will be defined by the attached claims and their equivalents and not by the above detailed descriptions.