Method for encapsulating organic electronic element

Patent metadata

Field	Value
Publication number	US-12096648-B2
Application number	US-201816651102-A
Country	US
Kind code	B2
Filing date	Oct 1, 2018
Priority date	Sep 29, 2017
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A method for encapsulating an organic electronic element and an organic electronic device is provided. The method for encapsulating the organic electronic element is capable of effectively blocking moisture or oxygen introduced from the outside to an organic electronic device, is excellent in flatness of an encapsulating layer to have excellent endurance reliability, and increases efficiency of an encapsulating process.

First claim

The invention claimed is:

1. A method for encapsulating an organic electronic element, comprising:
applying an ink composition on a substrate, wherein the ink composition is applied as two or more printed patterns extending in a same direction, wherein an interval exists between each of the printed patterns, where the interval is a hollow space where no ink has been applied, wherein an organic electronic element is applied on the substrate and has the ink composition applied thereon;
applying vibration to the applied ink composition at an intensity of 0.5 KHz to 150 KHz for 0.001 seconds to 300 seconds, wherein the applied vibration causes ink from the printed patterns to apply in the interval; and
then curing the applied ink composition to form an encapsulating layer which encapsulates the organic electronic element.

2. The method according to claim 1 , wherein the applying of the ink composition proceeds in a range of 50 dpi to 1000 dpi.

3. The method according to claim 1 , wherein the deposited ink composition has a thickness of 2 μm to 15 μm.

4. The method according to claim 1 , wherein the print patterns are formed of two or more ink composition dots and a pitch of the ink composition dots is in a range of 10 μm to 250 μm.

5. The method according to claim 1 , wherein the interval has a width of 10 μm to 250 μm.

6. The method according to claim 1 , wherein the curing of the applied ink composition comprises:
irradiating the applied ink composition with light.

7. The method according to claim 1 , further comprising:
applying heat to the applied ink composition.

8. The method according to claim 7 , wherein the applying of the heat proceeds before and/or after the curing of the applied ink composition.

9. The method according to claim 7 , wherein the applying of the heat proceeds in a range of 20° C. to 230° C.

10. The method according to claim 7 , wherein the applying of the heat proceeds in a range of 1 minute to 40 minutes.

11. The method according to claim 1 , wherein the ink composition is a solventless type photocurable composition.

12. The method according to claim 1 , wherein the ink composition comprises an epoxy compound and a compound having an oxetane group in an amount of 45 parts by weight to 145 parts by weight relative to 100 parts by weight of the epoxy compound.

13. The method according to claim 1 , wherein the ink composition comprises a fluorine-based surfactant.

14. An organic electronic device which is encapsulated according to the method of claim 1 , wherein the device comprises:
the substrate;
the organic electronic element disposed on the substrate; and
the encapsulating layer which encapsulates the organic electronic element,
wherein the encapsulating layer includes at least two patterned portions and a grooved portion therebetween, wherein the at least two patterned portions have a height H and the grooved portion has a height h, and wherein a ratio h/H×100 is from 1% to less than 30%.

Assignees

• Lg Chemical Ltd

Inventors

• Choi Kook Hyun
• Kim Joon Hyung
• Woo Yu Jin
• Yu Mi Lim

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K71/135

  using ink-jet printing · CPC title

• H10K50/844 Primary

  Encapsulations · CPC title

• H10K71/421

  using coherent electromagnetic radiation, e.g. laser annealing · CPC title

• H10K2102/351

  Thickness · CPC title