Display devices and methods for forming display devices
A display device is provided. The display device includes a thin-film transistor substrate, a conductive pad disposed on the thin-film transistor substrate, and an adhesion film disposed on the conductive pad. The adhesion film includes a plurality of conductive particles. The display device also includes a light-emitting component disposed on the adhesion film. The light-emitting component includes a connection feature. The display device also includes a protection layer partially surrounding the light-emitting component. The connection feature of the light-emitting component has a lower portion not surrounded by the protection layer. The adhesion film has a thickness of T, one of the plurality of conductive particles has a diameter of d, the lower portion of the connection feature has a thickness of t, and 0<t≤T−d.
1. A method for forming a display device, comprising:
providing a first temporary substrate with a first adhesion film thereon;
providing a carrier with a plurality of light-emitting components thereon;
attaching the plurality of light-emitting components onto the first temporary substrate through the first adhesion film;
removing the carrier from the plurality of light-emitting components;
providing a second temporary substrate with a second adhesion film thereon;
attaching the plurality of light-emitting components onto the second temporary substrate through the second adhesion film;
removing the first adhesion film and the first temporary substrate from the plurality of light-emitting components;
bonding the plurality of light-emitting components onto a thin-film transistor substrate;
removing the second temporary substrate from the second adhesion film; and
removing the second adhesion film from the plurality of light-emitting components.
2. The method as claimed in claim 1 , wherein the step of removing the second adhesion film from the plurality of light-emitting components comprises selectively debonding a portion of the second adhesion film.
3. The method as claimed in claim 1 , wherein the step of removing the first adhesion film and the first temporary substrate from the plurality of light-emitting components comprises exposing the first adhesion film to a light of a first wavelength, and the step of removing the second adhesion film from the plurality of light-emitting components comprises exposing the second adhesion film to another light of a second wavelength that is different from the first wavelength.
4. The method as claimed in claim 1 , wherein one of the first adhesion film and the second adhesion film is a UV-light debondable film, and the other one of the first adhesion film and the second adhesion film is a heat debondable film.
5. The method as claimed in claim 1 , wherein at least one of the plurality of light-emitting components on the carrier is partially surrounded by a protection layer, and the protection layer comprises an organic sub-layer and an inorganic sub-layer.
6. The method as claimed in claim 1 , further comprising:
forming a filler layer on the thin-film transistor substrate before the step of bonding the plurality of light-emitting components onto the thin-film transistor substrate.
7. The method as claimed in claim 1 , wherein the second adhesion film is a patterned adhesion film.
8. The method as claimed in claim 7 , wherein the second adhesion film comprises a plurality of adhesive pads, and a pitch of the plurality of adhesive pads is an integer multiple of a pitch of the plurality of light-emitting components on the first temporary substrate.
9. A method for forming a display device, comprising:
providing a first temporary substrate with a first plurality of light-emitting components thereon;
providing a first transfer substrate with a first plurality of adhesive pads thereon, wherein a pitch of the first plurality of adhesive pads is an integer multiple of a pitch of the first plurality of light-emitting components on the first temporary substrate;
attaching a first group of the first plurality of light-emitting components onto a first group of the first plurality of adhesive pads on the first transfer substrate;
removing the first temporary substrate, while leaving the first group of the first plurality of light-emitting components on the first transfer substrate;
attaching a second group of the first plurality of light-emitting components onto a second group of the first plurality of adhesive pads on the first transfer substrate;
removing the first temporary substrate, while leaving the second group of the first plurality of light-emitting components on the first transfer substrate; and
bonding the first group and the second group of the first plurality of light-emitting components onto a thin-film transistor substrate.
10. The method as claimed in claim 9 , further comprising:
forming a filler layer on the thin-film transistor substrate before the step of bonding the first group and the second group of the first plurality of light-emitting components onto the thin-film transistor substrate.
11. The method as claimed in claim 9 , further comprising:
providing a second transfer substrate with a second plurality of light-emitting components thereon, wherein the second plurality of light-emitting components are attached onto the second transfer substrate through a second plurality of adhesive pads; and
bonding the second plurality of light-emitting components onto the thin-film transistor substrate.
12. The method as claimed in claim 11 , wherein a pitch of the second plurality of adhesive pads is equal to the pitch of the first plurality of adhesive pads.
13. The method as claimed in claim 11 , wherein the first plurality of light-emitting components comprises a first plurality of light-emitting diodes of a first color, and the second plurality of light-emitting components comprises a second plurality of light-emitting diodes of a second color different from the first color.
14. The method as claimed in claim 9 , wherein the first plurality of adhesive pads comprise a UV-light debondable material or a heat debondable material.
15. The method as claimed in claim 9 , wherein at least one of the first plurality of light-emitting components on the first temporary substrate is partially surrounded by a protection layer, and the protection layer comprises an organic sub-layer and an inorganic sub-layer.