# US 12,156,423 B2 · Composite film and manufacturing method thereof, and encapsulation structure including the composite film

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- Number: US 12,156,423 B2
- Document ID: US12156423B2
- Status: Granted
- Kind: B2
- Application number: 16/987,610
- Filed: 2020-08-07
- Published: 2020-11-19
- Granted: 2024-11-26
- Earliest claimed: 2013-10-31
- Assignees: Beijing BOE Technology Development Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Li Sun
- Web page: https://patentgrep.com/patent/US12156423B2

## CPC

- B32B 7/03: with respect to the orientation of features (direction of fibres or filaments B32B5/12)
- B32B 27/06: as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)}
- B32B 27/08: of synthetic resin
- B32B 27/281: {comprising polyimides}
- B32B 27/286: {comprising polysulphones; polysulfides}
- B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- B32B 33/00: Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
- B32B 37/02: characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
- B32B 37/24: with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate (B32B37/15 takes precedence)
- B32B 2037/243: {Coating}
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/20: Inorganic coating
- B32B 2255/205: Metallic coating
- B32B 2307/7244: Oxygen barrier
- B32B 2307/7265: Non-permeable
- B32B 2310/0831: using UV radiation
- B32B 2398/10: Thermosetting resins
- B32B 2439/00: Containers; Receptacles
- B32B 2457/206: Organic displays, e.g. OLED
- H10K 50/841: {Self-supporting sealing arrangements}
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The present invention discloses a composite film, a manufacturing method thereof and an encapsulation structure comprising the composite film. The composite film comprises at least one matrix membrane, each of which comprises at least one waterproof film. In the technical solutions provided by the present invention, the composite film comprises a matrix membrane comprising at least one waterproof film, and therefore, the composite film can be directly disposed on an OLED when the OLED is encapsulated by using the composite film. Accordingly, during an encapsulation process, the used process is simple, the process steps become less, the process time is short, and the required equipment is simpler, so that the production cost is reduced, and the production efficiency is improved.

## Claims

### Claim 1

A manufacturing method of an OLED encapsulation film comprising a step of:
a) forming a matrix membrane precursor layer;
b) depositing at least three waterproof films on a surface of the matrix membrane precursor layer, a spacing being formed between every two adjacent waterproof films, and lengths of spacings between the waterproof films in a direction parallel to the surface of the matrix membrane precursor layer where the plurality of waterproof films are located being the same;
c) forming another matrix membrane precursor layer on the waterproof films; and
d) performing a curing process to form one matrix membrane, wherein the waterproof films are formed of a rigid material selected from a group comprising the following materials: SiOx, SiNx, Al2O3, Al, Ag, gold, ultrathin glass, diamond, graphene, ZnO, ZrO, and TiO2.

### Claim 2 (depends on 1)

The manufacturing method of an OLED encapsulation film according to claim 1, further comprising steps of:
executing steps a)-d) repeatedly to obtain a plurality of matrix membranes, and laminating the plurality of matrix membranes to form an OLED encapsulation film comprising the plurality of laminated matrix membranes, wherein the waterproof films in two adjacent matrix membranes are staggered with each other.

### Claim 3 (depends on 1)

The manufacturing method of an OLED encapsulation film according to claim 1, wherein the curing process is performed through UV curing or thermocuring.