NON-COMMON CAPPING LAYER ON AN ORGANIC DEVICE

• US 20150021582A1
• Filed: 10/06/2014
• Published: 01/22/2015
• Est. Priority Date: 06/17/2011
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: WEAVER, Michael S., Hack, Michael
• Granted Patent: US 10,340,313 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 50/858 comprising refractive means, e.g. lenses
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/30 Devices specially adapted for multicolour light emission
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

A first method comprises providing a plurality of organic light emitting devices (OLEDs) on a first substrate. Each of the OLEDs includes a transmissive top electrode. The plurality of OLEDs includes a first portion of OLEDs and a second portion of OLEDs that is different from the first portion. The first method further includes depositing a first capping layer over at least the first portion of the plurality of OLEDs such that the first capping layer is optically coupled to at least the first portion of the plurality of OLEDs. A second capping layer is deposited over at least the second portion of the plurality of OLEDs such that the second capping layer is optically coupled to the second portion of the plurality of OLEDs but not the first portion of the plurality of OLEDs.

Claims

1. An apparatus comprising:

a plurality of OLEDs, wherein each OLED comprises;

a first electrode;

a second electrode disposed over the first electrode; and

an organic electroluminescent (EL) material disposed between the first and the second electrodes;

a first capping layer, wherein the first capping layer is disposed over the second electrode of at least a first portion of the plurality of OLEDs such that the first capping layer is optically coupled to at least the first portion of the plurality of OLEDs; and

a second capping layer, wherein the second capping layer is disposed over the second electrode of at least a second portion of the plurality of OLEDs such that the second capping layer is optically coupled to the second portion of the plurality of OLEDs but not the first portion of the plurality of OLEDs.

2. The apparatus of claim 1, wherein the plurality of OLEDs comprises a plurality of red OLEDs, a plurality of blue OLEDs, and a plurality of green OLEDs.

3. The apparatus of claim 2, wherein the plurality of OLEDs further comprise a third portion of OLEDs that is different from the first and second portions, further comprising a third capping layer disposed over the second electrode of at least the third portion of the plurality of OLEDs such that the third capping layer is optically coupled to at least the third portion of the plurality of OLEDs.

4. The apparatus of claim 3, wherein the second or the third capping layers were not deposited through a fine metal mask (FMM).

5. The apparatus of claim 4, wherein the second capping layer is not optically coupled to the plurality of blue OLEDs or the plurality of green OLEDs and wherein the third capping layer is not optically coupled to the plurality of red OLEDs or the plurality of blue OLEDs.