# US 10,374,188 B2 · Light-emitting device with auxiliary electrode and adjacent insular conductive portions

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- Number: US 10,374,188 B2
- Document ID: US10374188B2
- Status: Granted
- Kind: B2
- Application number: 15/311,814
- Filed: 2015-03-31
- Published: 2017-03-30
- Granted: 2019-08-06
- Earliest claimed: 2014-05-16
- Assignees: Pioneer Corporation
- Applicants: Pioneer Corporation
- Inventors: Yohei Tanaka
- Web page: https://patentgrep.com/patent/US10374188B2

## CPC

- H10K 50/814: combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
- H10K 50/805: Electrodes
- H10K 50/841: {Self-supporting sealing arrangements}
- H10K 71/135: {using ink-jet printing}
- H10K 71/611: {using printing deposition, e.g. ink jet printing}
- H10K 2102/331: {Nanoparticles used in non-emissive layers, e.g. in packaging layer}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A light-emitting device (100) includes a substrate (110), a first electrode (120), an auxiliary electrode (124), an insular conductive layer (126), an insulating layer (170), an organic layer (130), and a second electrode (140). The first electrode (120) is formed over the substrate (110), and is formed using a transparent conductive material. The auxiliary electrode (124) is formed over the first electrode (120). The conductive layer (126) is formed over the first electrode (120), and is formed of the same material as that of the auxiliary electrode (124). The insulating layer (170) is formed over a portion of the first electrode (120), and covers the auxiliary electrode (124) and the conductive layer (126). The organic layer (130) is formed over the first electrode (120), and the second electrode (140) is formed over the organic layer (130).

## Claims

### Claim 1

A light-emitting device comprising:
a substrate;
a first electrode, formed over the substrate, and comprising
a transparent conductive material;
an auxiliary electrode formed over the first electrode;
an insular conductive portion formed over the first electrode and formed of the same material as that of the auxiliary electrode;
an insulating layer comprising a plurality of openings and a portion that covers the auxiliary electrode and the insular conductive portion, and a continuous width of the portion of the insulating layer that covers the auxiliary electrode and the insular conductive portion is more than twice a width of the auxiliary electrode;
an organic layer formed over the first electrode; and
a second electrode formed over the organic layer.

### Claim 2 (depends on 1)

The light-emitting device according to claim 1, wherein the auxiliary electrode is formed of a coating material including a metal particle.

### Claim 3 (depends on 2)

The light-emitting device according to claim 2, wherein an area of the insular conductive portion is equal to or less than 50 μm2.

### Claim 4 (depends on 3)

The light-emitting device according to claim 3, further comprising a plurality of the insular conductive portions,
wherein one or more of the insular conductive portions are not covered with the insulating layer, and
at least a surface layer of the insular conductive portion located outside the insulating layer is insulated or increased in resistance.

### Claim 5 (depends on 4)

The light-emitting device according to claim 4, wherein a plurality of the auxiliary electrodes extend in parallel to each other, and
a density of the insular conductive portion at a halfway point of the plurality of auxiliary electrodes is lower than a density of the insular conductive portion in a region adjacent to the auxiliary electrode.

### Claim 6 (depends on 5)

The light-emitting device according to claim 5, wherein the metal particle is a silver particle.

### Claim 7 (depends on 1)

The light-emitting device according to claim 1, wherein a distance from a center of the auxiliary electrode to an edge of the insulating layer is equal to or greater than 40 μm and equal to or less than 60 μm, in a width direction of the auxiliary electrode.

### Claim 8 (depends on 1)

The light-emitting device according to claim 1, wherein each of the plurality of openings overlaps with the first electrode, the organic layer, and the second electrode.