Anisotropic conductive film (ACF) including a relfective layer
An anisotropic conductive film (ACF) is disclosed. In one approach, the ACF includes a non-reflective adhesive layer including a top surface, a plurality of conductive particles included with the non-reflective adhesive layer, and a reflective adhesive layer disposed along the top surface of the non-reflective adhesive layer. The reflective layer includes at least five percent reflective particles by percentage weight.
1. An anisotropic conductive film (ACF), comprising:
a non-reflective adhesive layer including a top surface;
a plurality of conductive particles included with the non-reflective adhesive layer; and
a reflective adhesive layer disposed along the top surface of the non-reflective adhesive layer, wherein the reflective layer includes at least five percent reflective particles by percentage weight,
wherein:
the ACF is a fixed-array ACF and the conductive particles are arranged in predetermined locations along a bottom surface of the non-reflective adhesive layer; and
the non-reflective adhesive layer includes a concentration of at least 20,000 pcs/mm 2 of the conductive particles.
2. The ACF of claim 1 , wherein the conductive particles are partially embedded along the bottom surface of the non-reflective adhesive layer.
3. The ACF of claim 1 , wherein the reflective particles are selected from the group consisting of: reflective and retro-reflective particles.
4. The ACF of claim 1 , wherein the reflective particles are selected from the group consisting of: electrical conductors and electrical insulators.
5. The ACF of claim 1 , wherein the reflective particles are high refractive index oxides selected from the group consisting of: indium-tin-oxide (ITO), zinc oxide (ZnO), titanium dioxide (TiO 2 ), indium-zinc-oxide (IZO), tin oxide (SnO), zirconium oxide (ZrO 2 ), and their alloys thereof.
6. The ACF of claim 1 , wherein the reflective particles are selected from the group consisting of: hollow glass microspheres, mica, cholesteric liquid crystal pigment particles, and holo cross-linked polymer particles.
7. The ACF of claim 1 , wherein the reflective layer comprises filler particles selected from the group consisting of: zinc oxide (ZnO), boron nitride (SN), silicon oxide (SiO 2 ), aluminium oxide (A 1 2 O 3 ), calcium carbonate (CaCO 3 ), or calcium sulfate (CaSO 4 ), and combinations thereof.
8. The ACF of claim 1 , wherein the reflective layer includes at least ten percent reflective particles by percentage weight.
9. The ACF of claim 8 , wherein the top surface of the non-reflective adhesive layer is pre-embossed.
10. The ACF of claim 1 , comprising a release liner disposed along a top surface of the reflective layer.
11. The ACF of claim 10 , wherein a bottom surface of the release liner is pre-embossed.
12. The ACF of claim 1 , wherein the reflective adhesive layer includes a thickness ranging from about 1 μm to about10 μm.
13. An anisotropic conductive film (ACF), comprising:
a non-reflective adhesive layer including a top surface;
a plurality of conductive particles included with the non-reflective adhesive layer; and
a thin film deposited reflective layer disposed along the top surface of the non-reflective adhesive layer, the thin film deposited reflective layer including a second top surface; and
a secondary adhesive layer disposed along the second top surface of the thin film deposited reflective layer,
wherein:
the ACF is a fixed-array ACF and the conductive particles are arranged in predetermined locations along a bottom surface of the non-reflective adhesive layer; and
the non-reflective adhesive layer includes a concentration of at least 20,000 pcs/mm 2 of the conductive particles.
14. The ACF of claim 13 , wherein the conductive particles are partially embedded along the bottom surface of the non-reflective adhesive layer.
15. The ACF of claim 13 , wherein the reflective layer includes at least ten percent reflective particles by percentage weight.
16. The ACF of claim 13 , wherein the thin film deposited reflective layer is a vapor deposited layer.
17. The ACF of claim 13 , wherein the thin film deposited reflective layer is a reflective sputtered layer.
18. A light-emitting device, comprising:
a light-emitting housing including a plurality of light-emitting elements;
an electrode substrate;
a plurality of chip bumps disposed between the light-emitting housing and the electrode substrate; and
an anisotropic conductive film (ACF) electrically connecting the light-emitting housing and the electrode substrate, comprising:
a non-reflective adhesive layer including a top surface;
a plurality of conductive particles included with the non-reflective adhesive layer; and
a reflective adhesive layer disposed along the top surface of the non-reflective adhesive layer, wherein the reflective layer includes at least five percent reflective particles by percentage weight,
wherein the ACF is a fixed-array ACF and the conductive particles are arranged in predetermined locations along a bottom surface of the non-reflective adhesive layer.
19. The light-emitting device of claim 18 , wherein the reflective layer includes at least ten percent reflective particles by percentage weight.
20. The light-emitting device of claim 18 , wherein the reflective particles are high refractive index oxides selected from the group consisting of: indium-tin-oxide (ITO), zinc oxide (ZnO), titanium dioxide (TiO 2 ), indium-zinc-oxide (IZO), tin oxide (SnO), zirconium oxide (ZrO 2 ), and their alloys thereof.
21. The light-emitting device of claim 18 , wherein the reflective particles are selected from the group consisting of: hollow glass microspheres, mica, cholesteric liquid crystal pigment particles, and holo cross-linked polymer particles.
22. The light-emitting device of claim 18 , wherein the reflective layer comprises filler particles selected from the group consisting of: zinc oxide (ZnO), boron nitride (SN), silicon oxide (SiO 2 ), aluminium oxide (A 1 2 O 3 ), calcium carbonate (CaCO 3 ), or calcium sulfate (CaSO 4 ), and combinations thereof.
23. A light-reflecting or transflecting device, comprising:
a housing;
an electrode substrate;
an anisotropic conductive film (ACF) electrically connecting the housing and the electrode substrate, comprising:
a non-reflective adhesive layer including a top surface;
a plurality of conductive particles included with the non-reflective adhesive layer; and
a reflective adhesive layer disposed along the top surface of the non-reflective adhesive layer, wherein the reflective layer includes at least five percent reflective particles by percentage weight, wherein:
pre-bonding the ACF was a fixed-array ACF and the conductive particles were arranged in predetermined locations along a bottom surface of the non-reflective adhesive layer; and
the non-reflective adhesive layer includes a concentration of at least 20,000 pcs/mm 2 of the conductive particles; and
a plurality of chip bumps in contact with at least a portion of the conductive particles.
24. The light-reflecting or transflecting device of claim 23 , wherein the reflective layer includes at least ten percent reflective particles by percentage weight.
25. The light-reflecting or transflecting device of claim 23 , wherein the reflective particles are high refractive index oxides selected from the group consisting of: indium-tin-oxide (ITO), zinc oxide (ZnO), titanium dioxide (TiO 2 ), indium-zinc-oxide (IZO), tin oxide (SnO), zirconium oxide (ZrO 2 ), and their alloys thereof.
26. The light-reflecting or transflecting device of claim 23 , wherein the reflective particles are selected from the group consisting of: hollow glass microspheres, mica, cholesteric liquid crystal pigment particles, and holo cross-linked polymer particles.
27. The light-reflecting or transflecting device of claim 23 , wherein the reflective layer comprises filler particles selected from the group consisting of: zinc oxide (ZnO), boron nitride (SN), silicon oxide (SiO 2 ), aluminium oxide (A 1 2 O 3 ), calcium carbonate (CaCO 3 ), or calcium sulfate (CaSO 4 ), and combinations thereof.