Multi-ink layered printed electrode for wrap around electrodes
In the present invention, metal nanoparticles are obtained by subjecting a composition for manufacturing metal nanoparticles to a thermal reaction, the composition including (A) a metal oxalate, (B) an amine compound, and (C) a hydroxy fatty acid. The metal nanoparticles are readily dispersed in a polar solvent or a solvent mixture having a high ratio of a polar solvent.
1 . A method of manufacturing an electrode, the method comprising:
printing a metal precursor ink onto a contact pad on a substrate;
drying the metal precursor ink;
printing a nanoparticle ink on the metal precursor ink; and
consolidating the metal precursor ink and the nanoparticle ink such that metal from the precursor ink and metal from the nanoparticle ink fuse together.
2 . The method of claim 1 , wherein the steps of printing the metal precursor ink and printing the nanoparticle ink are performed by one of an aerosol printer, a pad printer, an ink jet printer, and a spray printer.
3 . The method of claim 1 , wherein the step of drying the metal precursor ink is under ambient conditions.
4 . The method of claim 1 , wherein the step of drying the metal precursor ink is performed at a temperature up to 150° C.
5 . The method of claim 1 , wherein the step of consolidating the metal precursor ink and the nanoparticle ink is at a temperature of less than or equal to 250° C.
6 . The method of claim 1 , wherein the step of consolidating the metal precursor ink and the nanoparticle ink is performed using a laser.
7 . The method of claim 1 , wherein the contact pad includes two contact pads, one being a display contact pad extending from a microLED array on the substrate and one being a rear surface contact pad on an opposite side of the substrate from the microLED array.
8 . The method of claim 7 , further comprising the step of providing a wraparound electrode to contact both the display contact pad and the rear surface contact pad.
9 . The method of claim 1 , wherein the substrate is glass.
10 . The method of claim 1 , wherein a metal in the metal precursor ink and in the nanoparticle ink is silver.
11 . The method of claim 1 , wherein a metal in the metal precursor ink and in the nanoparticle ink is copper.
12 . The method of claim 1 , wherein a metal in the metal precursor ink and a metal in in the nanoparticle ink are the same.
13 . The method of claim 1 , wherein a metal in the metal precursor ink and a metal in in the nanoparticle ink are different.
14 . An array substrate comprising:
a substrate;
a microLED array on a front surface of the substrate and including a display contact pad;
a metal precursor ink electrically contacting the display contact pad; and
a nanoparticle ink electrically contacting the metal precursor ink on the display contact pad.
15 . The array substrate of claim 14 , further comprising:
a rear surface contact pad on a rear surface of the substrate opposite to the front surface;
the metal precursor ink electrically contacting the rear surface contact pad; and
the nanoparticle ink electrically contacting the metal precursor ink on the rear surface contact pad.
16 . The array substrate of claim 15 , further comprising a wraparound electrode to contact the nanoparticle ink on the display contact pad and the rear surface contact pad.
17 . The array substrate of claim 14 , wherein a metal in the metal precursor ink and in the nanoparticle ink is silver.
18 . The array substrate of claim 14 , wherein a metal in the metal precursor ink and in the nanoparticle ink is copper.
19 . The array substrate of claim 14 , wherein the substrate is glass.
20 . The array substrate of claim 14 , wherein a metal in the metal precursor ink and a metal in in the nanoparticle ink are the same.
21 . The array substrate of claim 14 , wherein a metal in the metal precursor ink and a metal in in the nanoparticle ink are different.
22 . An electrode comprising:
a metal precursor ink electrically contacting a contact pad; and
a nanoparticle ink electrically contacting the metal precursor ink on the contact pad.
23 . The electrode of claim 22 , wherein a metal in the metal precursor ink and in the nanoparticle ink is silver.
24 . The electrode of claim 22 , wherein a metal in the metal precursor ink and in the nanoparticle ink is copper.
25 . The electrode of claim 22 , wherein a metal in the metal precursor ink and a metal in in the nanoparticle ink are the same.
26 . The electrode of claim 22 , wherein a metal in the metal precursor ink and a metal in in the nanoparticle ink are different.