Light-emitting device, manufacturing method thereof and display module using the same
A light-emitting device includes a carrier, a light-emitting element and a connection structure. The carrier includes a first electrical conduction portion. The light-emitting element includes a first light-emitting layer capable of emitting first light and a first contact electrode formed under the light-emitting layer. The first contact electrode is corresponded to the first electrical conduction portion. The connection structure includes a first electrical connection portion and a protective portion surrounding the first contact electrode and the first electrical connection portion. The first electrical connection portion includes an upper portion, a lower portion and a neck portion arranged between the upper portion and the lower portion. An edge of the upper portion is protruded beyond the neck portion, and an edge of the lower portion is protruded beyond the upper portion.
1. A light-emitting device, comprising:
a substrate, having a conductive pad;
a first light-emitting element, comprising a bottom surface, and a first contact electrode and a second contact electrode which are arranged under the bottom surface; and
a connection structure, comprising a first electrical connection portion, a second electrical connection portion, and a protective portion, wherein the first electrical connection portion electrically connects the first contact electrode and the conductive pad, the second electrical connection portion electrically connects the second contact electrode and the conductive pad, and the protective portion surrounds the first contact electrode, the second contact electrode, the first electrical connection portion, and the second electrical connection portion;
wherein, the protective portion and the bottom surface have an interface with a maximum width smaller than that of the first light-emitting element.
2. The light-emitting device of claim 1 , wherein the first light-emitting element has an outermost surface which is not covered by the protective portion.
3. The light-emitting device of claim 1 , wherein, in a bottom view, the connection structure has an area smaller than that of the first light-emitting element.
4. The light-emitting device of claim 1 , wherein the protective portion comprises thermosetting polymer.
5. The light-emitting device of claim 1 , wherein the protective portion comprises epoxy resin.
6. The light-emitting device of claim 1 , wherein, in a top view, the first electrical connection portion has an area larger than that of the first contact electrode.
7. The light-emitting device of claim 1 , further comprising a second light-emitting element arranged on the substrate without being connected to the protective portion.
8. The light-emitting device of claim 1 , wherein the first electrical connection portion includes tin (Sn) or indium (In).
9. The light-emitting device of claim 1 , wherein the protective portion is directly connected to the first contact electrode, the second contact electrode, the first electrical connection portion, the second electrical connection portion, and the conductive pad.
10. The light-emitting device of claim 1 , wherein the protective portion has a portion filled into a space among the first light-emitting element, the first electrical connection portion, the second electrical connection portion, and the substrate.
11. A display device, comprising:
a light-emitting device, as a pixel in the display device, comprising:
a substrate, having a conductive pad;
a first light-emitting element, comprising a bottom surface, and a first contact electrode and a second contact electrode which are arranged under the bottom surface; and
a connection structure, comprising a first electrical connection portion, a second electrical connection portion, and a protective portion, wherein the first electrical connection portion electrically connects the first contact electrode and the conductive pad, the second electrical connection portion electrically connects the second contact electrode and the conductive pad, and the protective portion surrounds the first contact electrode, the second contact electrode, the first electrical connection portion, and the second electrical connection portion;
wherein, the protective portion and the bottom surface have an interface with a maximum width smaller than that of the first light-emitting element.
12. The display device of claim 11 , wherein the first light-emitting element has an outermost surface which is not covered by the protective portion.
13. The display device of claim 11 , wherein, in a bottom view, the connection structure has an area smaller than that of the first light-emitting element.
14. The display device of claim 11 , wherein, in a top view, the first electrical connection portion has an area larger than that of the first contact electrode.
15. The display device of claim 11 , further comprising a second light-emitting element arranged on the substrate without being connected to the protective portion.
16. The display device of claim 11 , wherein the protective portion is directly connected to the first contact electrode, the second contact electrode, the first electrical connection portion, the second electrical connection portion, and the conductive pad.
17. The display device of claim 11 , wherein the protective portion has a portion filled into a space among the first light-emitting element, the first electrical connection portion, the second electrical connection portion, and the substrate.