# US 10,319,942 B2 · OLED device, packaging method thereof, and packaging apparatus

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- Number: US 10,319,942 B2
- Document ID: US10319942B2
- Status: Granted
- Kind: B2
- Application number: 15/321,347
- Filed: 2015-04-17
- Published: 2017-07-27
- Granted: 2019-06-11
- Earliest claimed: 2015-01-15
- Assignees: Boe Technology Group Co., Ltd.; Ordos Yuansheng Optoelectronics Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.; Ordos Yuansheng Optoelectronics Co., Ltd.
- Inventors: Xiang Feng; Tao Wang; Yun Qiu
- Web page: https://patentgrep.com/patent/US10319942B2

## CPC

- B32B 9/04: comprising such {particular} substance 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 glass layer B32B17/06; layered products with at least two ceramic layers composed mainly of ceramic B32B18/00)}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 9/041: {of metal}
- B32B 9/045: {of synthetic resin}
- 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 27/28: comprising synthetic resins not wholly covered by any one of the sub-groups {B32B27/30 - B32B27/42}
- B32B 27/283: {comprising polysiloxanes}
- 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 27/38: comprising epoxy resins
- B32B 27/40: comprising polyurethanes
- B32B 27/42: comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
- H10K 50/84: Passivation; Containers; Encapsulations
- H10K 71/12: using liquid deposition, e.g. spin coating
- H10K 71/40: Thermal treatment, e.g. annealing in the presence of a solvent vapour
- B32B 2255/00: Coating on the layer surface
- B32B 2255/20: Inorganic coating
- B32B 2255/24: Organic non-macromolecular coating
- B32B 2255/26: Polymeric coating
- B32B 2255/28: Multiple coating on one surface
- B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers
- B32B 2307/546: Flexural strength; Flexion stiffness
- B32B 2307/7244: Oxygen barrier
- B32B 2307/7265: Non-permeable
- B32B 2307/748: Releasability
- B32B 2457/206: Organic displays, e.g. OLED
- B32B 2553/00: Packaging equipment or accessories not otherwise provided for
- H10K 2102/00: Constructional details relating to the organic devices covered by this subclass
- 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 provides an OLED device, and a packaging method thereof and a packaging apparatus. The packaging method is for packaging an OLED device formed on a base substrate, and includes: separating a graphene thin film formed on a copper foil from the copper foil; and packaging the OLED device using the graphene thin film. In the packaging method, the graphene thin film is introduced into packaging of an OLED device, thereby not only improving packaging effect of the OLED device, but also simplifying packaging process of the OLED device and increasing production efficiency.

## Claims

### Claim 1

A packaging method for packaging an OLED device formed on a base substrate, comprising: separating a graphene thin film formed on a copper foil from the copper foil; and packaging the OLED device using the graphene thin film,
wherein separating the graphene thin film formed on the copper foil from the copper foil comprises:
step S10: adhering a surface of the copper foil on which no graphene thin film is formed to a fixing substrate by a double-sided adhesive;
step S11: processing a viscous polymer into a fluid state and pouring the fluid state viscous polymer onto a surface of the copper foil on which the graphene thin film is formed;
step S12: gluing the viscous polymer with an adhesive tape after curing the viscous polymer, and then stripping a composite film formed of the graphene thin film and the viscous polymer from the copper foil;
step S13: forming a passivation layer on the OLED device, coating a transparent adhesive on the passivation layer, and adhering a surface of the graphene thin film of the composite film to the transparent adhesive before curing the transparent adhesive; and
step S14: curing the transparent adhesive.

### Claim 2 (depends on 1)

The packaging method of claim 1, wherein the viscous polymer is processed into a fluid state by employing a melting method in the step S11.

### Claim 3 (depends on 1)

The packaging method of claim 1, wherein the passivation layer is formed by using low temperature chemical vapor deposition, atomic layer deposition or room temperature bonding; a temperature at which the passivation layer is deposited by using the low temperature chemical vapor deposition is lower than or equal to a critical temperature of heat treatment of the OLED device; the passivation layer is made of silicon nitride, silicon dioxide, aluminum oxide, or silicon oxynitride.

### Claim 4 (depends on 1)

An OLED device, packaged by using the packaging method of claim 1.

### Claim 5

A packaging method, comprising:
forming a passivation layer on an OLED device formed on a base substrate, and coating a transparent adhesive on the passivation layer;
adhering a surface of a copper foil on which a graphene thin film is formed to the transparent adhesive before curing the transparent adhesive;
curing the transparent adhesive; and
fixing the base substrate, gluing a surface of the copper foil on which no graphene thin film is formed by using an adhesive tape, and separating the copper foil from the graphene thin film.

### Claim 6 (depends on 5)

The packaging method of claim 5, further comprising forming a protection layer on the graphene thin film after separating the copper foil from the graphene thin film.

### Claim 7 (depends on 6)

The packaging method of claim 6, wherein the protection layer is formed by using solution spin coating or chemical vapor deposition; the protection layer is made of a transparent organic insulating material or a transparent inorganic insulating material.

### Claim 8 (depends on 1)

The packaging method of claim 1, wherein the fixing substrate is made of glass, quartz or silicon wafer material.

### Claim 9 (depends on 1)

The packaging method of claim 1, wherein a size of the graphene thin film is greater than a size of the OLED device, and the graphene thin film entirely covers the OLED device.

### Claim 10 (depends on 1)

The packaging method of claim 1, wherein the transparent adhesive is made of the same material as the viscous polymer; the viscous polymer comprises any one or more of polyethylene terephthalate, polydimethylsiloxane, polypropylene, epoxy resin type polyethylene, ABS plastic, polyvinyl chloride, polyformaldehyde, polycarbonate, phenolic plastic, polyurethane plastic, epoxy resin, unsaturated polyester plastic, furan plastic, organic silicon resin, and propylene based resin.

### Claim 11 (depends on 1)

The packaging method of claim 1, wherein a curing temperature of the transparent adhesive is lower than or equal to a critical temperature of heat treatment of the OLED device.

### Claim 12 (depends on 5)

The packaging method of claim 5, wherein a size of the graphene thin film is greater than a size of the OLED device, and the graphene thin film entirely covers the OLED device.

### Claim 13

A packaging method, comprising:
forming a passivation layer on an OLED device formed on a base substrate;
attaching a surface of a copper foil on which no graphene thin film is formed to a roller able to be heated;
fixing the base substrate onto a base table, with the OLED device facing away from the base table;
dripping a transparent adhesive on a first side of the OLED device on the base substrate such that a side edge of the graphene thin film on the roller corresponds to and contacts with the transparent adhesive;
heating the roller to cause the transparent adhesive to be in an incompletely cured state, rolling the roller to a second side of the OLED device opposite to the first side, so that the transparent adhesive is coated on the passivation layer after being dragged by the roller, the passivation layer is adhered to the graphene thin film by the transparent adhesive, and meanwhile the copper foil is separated from the graphene thin film; and
curing the transparent adhesive.

### Claim 14 (depends on 13)

The packaging method of claim 13, wherein the base substrate is fixed onto the base table by an adhering method or a vacuum absorption method when fixing the base substrate onto the base table.

### Claim 15 (depends on 13)

The packaging method of claim 13, wherein a size of the graphene thin film is greater than a size of the OLED device, and the graphene thin film entirely covers the OLED device.

### Claim 16 (depends on 13)

The packaging method of claim 13, further comprising forming a protection layer on the graphene thin film after separating the copper foil from the graphene thin film.

### Claim 17

A packaging apparatus for packaging an OLED device formed on a base substrate, comprising a packaging mechanism for separating a graphene thin film formed on a copper foil from the copper foil and packaging the OLED device using the graphene thin film,
wherein the packaging mechanism is configured to:
adhere a surface of the copper foil on which no graphene thin film is formed to a fixing substrate by a double-sided adhesive;
process a viscous polymer into a fluid state and pour the fluid state viscous polymer onto a surface of the copper foil on which the graphene thin film is formed;
glue the viscous polymer with an adhesive tape after curing the viscous polymer, and then strip a composite film formed of the graphene thin film and the viscous polymer from the copper foil;
form a passivation layer on the OLED device, coat a transparent adhesive on the passivation layer, and adhere a surface of the graphene thin film of the composite film to the transparent adhesive before curing the transparent adhesive; and
cure the transparent adhesive.

### Claim 18 (depends on 17)

The packaging apparatus of claim 17, further comprising a base table, wherein
the base table is used for supporting the base substrate and the OLED device, and the base substrate is attached onto a supporting surface of the base table;
the packaging mechanism comprises a cylindrical roller, a driving part and a heating part, a cylindrical surface of the roller is used for attaching the copper foil on which the graphene thin film is formed, and the surface of the copper foil on which no graphene thin film is formed is attached to the cylindrical surface of the roller;
the roller is provided above the base table, and a starting position for rolling the roller corresponds to a first side of the OLED device on the base substrate, a gap for accommodating a transparent adhesive is formed between the roller and the base substrate, the transparent adhesive comprises the viscous polymer;
the heating part is provided inside the roller, and is used for heating the cylindrical surface of the roller to cause the transparent adhesive to be in an incompletely cured state; and
the driving part is connected to an end part of the roller, and is used for driving the roller to roll to a second side of the OLED device opposite to the first side, and the rolling roller is able to drag the transparent adhesive to extend along the rolling direction of the roller.

### Claim 19 (depends on 18)

The packaging apparatus of claim 18, wherein an axial direction of the roller is parallel to a side edge of the base substrate corresponding to the first side of the OLED device, and a length of the roller is greater than or equal to that of the side edge of the base substrate.