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Thin Film Encapsulated Devices

A thin-film packaging and device technology, which is applied in the direction of electric solid-state devices, semiconductor devices, organic semiconductor devices, etc., can solve the problems affecting the structural stability of the isolation layer and device functional layer, and the inability to use desiccant in thin-film packaging.

Active Publication Date: 2017-02-15
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is to provide a thin-film packaging device, which solves the problem that the desiccant cannot be used in the thin-film packaging, and further solves the problem that the expansion of the desiccant affects the structural stability of the isolation layer and the functional layer of the device

Method used

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  • Thin Film Encapsulated Devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Please refer to image 3 , the thin film encapsulation device includes a substrate 11 , a barrier layer 12 , a functional layer 13 and a drying layer 14 . Wherein, the functional layer 13 includes a first surface and a second surface opposite to the first surface; the barrier layer 12 is arranged on the first surface and the second surface of the functional layer 13, and at least one barrier layer 12 At least a part or all of it is a dry layer 14, and the dry layer 14 includes a substrate 141 and a groove-shaped grid 142, the groove-shaped grid 142 is arranged on the surface of the substrate 141, and the groove-shaped grid 142 is filled with desiccant. The substrate 141 may be a structure similar to the barrier layer 12 or a structure supporting the groove-shaped grid 142 .

[0038] In this embodiment, the functional layer 13 is sandwiched by two barrier layers 12 to protect the functional layer 13 from the upper and lower directions, wherein the functional layer 13 c...

Embodiment 2

[0042] Please refer to Figure 7 , which is another preferred embodiment, the thin film encapsulation device is respectively a second barrier layer 21, a functional layer 22, a first dry layer 23, a first barrier layer 24 and a substrate 25 from top to bottom, and the structure can be better To prevent the infiltration of water vapor and oxygen, the double-layer protection can be achieved, and a barrier layer can also be added around the device, which can effectively prevent the infiltration of water vapor and oxygen at the edge. The structure of the first drying layer 23 is also a groove-shaped grid (not shown), the desiccant is filled in the groove-shaped grid, and the desiccant is bound by the groove-shaped grid to increase the binding capacity of the desiccant to achieve a good drying effect. At the same time, it can also prevent the desiccant from detaching without affecting the light transmittance.

[0043] Take the present embodiment as an example below to illustrate t...

Embodiment 3

[0047] Please refer to Figure 7 and Figure 8 , is another thin-film device packaging structure. Based on the second embodiment, the positions of the substrate 25 and the first barrier layer 24 are exchanged. This structure can also protect the device well. In this embodiment, the flexible substrate may also contain a barrier layer.

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Abstract

The invention provides a thin-film packaging device, in particular, a dry layer that does not affect the transmittance and stability of the substrate is introduced into the packaging structure of the thin-film barrier layer. The dry layer has a groove-filled structure, which has a strong moisture absorption effect without affecting the transmission of light, and can prevent damage to the stability of the barrier layer and the functional layer of the device due to moisture absorption expansion. The introduction of the dry layer can improve the anti-water and oxygen penetration effect of the barrier layer by 1 to 2 orders of magnitude, thus playing an important role in improving the life of flexible devices, and can also be used in organic / inorganic multilayer alternate flexible packaging film structures, in order to ensure Based on the water and oxygen barrier effect, the number of organic / inorganic alternating layers is reduced, and the packaging cost is reduced.

Description

technical field [0001] The invention relates to the technical field of encapsulation, in particular to a thin film encapsulation device. Background technique [0002] For most devices, such as displays, diodes, MEMS sensing devices, etc., a completely hermetic physical package is required for protection. Studies have shown that components such as water vapor and oxygen in the air have a great impact on the life of OLEDs. The reasons are mainly considered from the following aspects: when OLED devices work, electrons are injected from the cathode, which requires that the cathode work function be as low as possible, but Commonly used cathode materials, such as metal aluminum, magnesium calcium, etc., are generally more active and easily react with infiltrated water vapor and oxygen. In addition, water vapor will also chemically react with the hole transport layer and electron transport layer, or cause interface contact problems. These reactions will cause device failure. , Ox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/52
CPCY02E10/549H10K77/111H10K10/88H10K30/88H10K50/846H10K50/844H10K2102/311
Inventor 苏文明崔铮费斐张东煜宋民顺
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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