Environmental sensitive element package and encapsulation method thereof

• US 9,935,289 B2
• Filed: 01/22/2016
• Issued: 04/03/2018
• Est. Priority Date: 09/10/2010
• Status: Active Grant

• Current Assignee: HannStar Display Corporation
• Original Assignee: Industrial Technology Research Institute
• Inventors: Chen, Kuang-Jung, Yeh, Shu-Tang, Wang, Yung-Sheng
• Primary Examiner(s): Sample, David
• Assistant Examiner(s): Flores, Jr., Donald M
• Application Number:
  US15/003,805
• Publication Number:
  US 20160204379A1
• Time in Patent Office: 802 Days
• Field of Search: None
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/18 comprising iron or steel B32B15/011, B32B15/012 and B32B15/013 take precedence
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/20 Inorganic coating
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2307/546 Flexural strength; Flexion stiffness
• CPC Class Codes: B32B 2307/724 Permeability to gases, adsorption
• CPC Class Codes: B32B 2307/7244 Oxygen barrier
• CPC Class Codes: B32B 2307/7246 Water vapor barrier
• CPC Class Codes: B32B 2307/726 Permeability to liquids, absorption
• CPC Class Codes: B32B 2439/62 Boxes, cartons, cases
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 2553/00 Packaging equipment or accessories not otherwise provided for
• CPC Class Codes: 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
• CPC Class Codes: B32B 27/281 comprising polyimides
• CPC Class Codes: B32B 27/286 comprising polysulphones; polysulfides
• CPC Class Codes: B32B 27/308 comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 27/365 comprising polycarbonates
• CPC Class Codes: B32B 3/30 : characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: H10K 2101/00 : Properties of the organic materials covered by group H10K85/00
• CPC Class Codes: H10K 50/8426 : Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/8428 : Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 50/844 : Encapsulations
• CPC Class Codes: H10K 50/846 : comprising getter material or desiccants
• CPC Class Codes: Y10T 428/239 : Complete cover or casing

Abstract

A package of environmental sensitive element including a first substrate, a second substrate, a barrier structure between the first substrate and the second substrate, an environmental sensitive element and an adhesive is provided. The second substrate is disposed above the first substrate. The environmental sensitive element is disposed on the first substrate and located between the first substrate and the second substrate. The barrier structure is distributed outside the environmental sensitive element. The adhesive is disposed between the first substrate and the second substrate and encapsulates the environmental sensitive element and the barrier structure, wherein an outgassing of the adhesive under 120 degrees Celsius is less than or equal to 5×10⁻⁷ gram/cm².

Claims

1. An environmental sensitive element package, comprising:

a first substrate;

a second substrate disposed above the first substrate;

a barrier structure between the first substrate and the second substrate;

an environmental sensitive element disposed on the first substrate and between the first substrate and the second substrate, wherein the barrier structure is distributed outside the environmental sensitive element;

a flexible buffer layer disposed on the environmental sensitive element and made of small molecular compounds, oligomers, or organic-inorganic co-steaming materials; and

an adhesive disposed between the first substrate and the second substrate and encapsulating the environmental sensitive element, the barrier structure, and the flexible buffer layer, wherein an outgassing of the adhesive under 120 degrees Celsius is less than or equal to 5×

10<sup>−

7</sup> gram/cm², wherein an outgassing of the flexible buffer layer under 120 degrees Celsius is less than the outgassing of the adhesive under 120 degrees Celsius, and the outgassing of the flexible buffer layer under 120 degrees Celsius is less than 5×

10<sup>−

8</sup> gram/cm².

2. The environmental sensitive element package as claimed in claim 1, wherein the barrier structure and the second substrate are integrally formed and substantially made of a same material, the barrier structure and the second substrate are made of stainless steel, glass, or plastic.

3. The environmental sensitive element package as claimed in claim 1, wherein the barrier structure is disposed on the second substrate and protrudes from the second substrate toward the first substrate.

4. The environmental sensitive element package as claimed in claim 1, further comprising:

a flexible passivation layer covering the flexible buffer layer, wherein the flexible buffer layer is located between the environmental sensitive element and the flexible passivation layer.

5. The environmental sensitive element package as claimed in claim 1, further comprising:

a plurality of passivation films covering the flexible buffer layer.

6. The environmental sensitive element package as claimed in claim 1, further comprising:

a flexible passivation layer covering the flexible buffer layer; and

a plurality of passivation films covering the flexible passivation layer, wherein the flexible passivation layer is between the flexible buffer layer and the plurality of passivation films.

7. The environmental sensitive element package as claimed in claim 1, wherein the outgassing of the adhesive under 120 degrees Celsius ranges from 5×

10<sup>−

8</sup> gram/cm² to 5×

10<sup>−

7</sup> gram/cm².

8. An environmental sensitive element package, comprising:

a first substrate;

a second substrate disposed above the first substrate;

a barrier structure between the first substrate and the second substrate;

an environmental sensitive element disposed on the first substrate and between the first substrate and the second substrate, wherein the barrier structure is distributed outside the environmental sensitive element;

a flexible buffer layer disposed on the environmental sensitive element and made of small molecular compounds, oligomers, or organic-inorganic co-steaming materials; and

an adhesive disposed between the first substrate and the second substrate and encapsulating the environmental sensitive element, the barrier structure, and the flexible buffer layer, wherein an outgassing of the adhesive under 120 degrees Celsius is less than or equal to 5×

10<sup>−

7</sup> gram/cm², wherein an outgassing of the flexible buffer layer under 120 degrees Celsius is less than the outgassing of the adhesive under 120 degrees Celsius, and the outgassing of the flexible buffer layer under 120 degrees Celsius is less than 5×

10<sup>−

8</sup> gram/cm², wherein the outgassing of the adhesive increases gradually from a first side of the adhesive near the environmental sensitive element to a second side of the adhesive opposite to the first side of the adhesive.

9. The environmental sensitive element package as claimed in claim 8, wherein the barrier structure and the second substrate are integrally formed and substantially made of a same material, the barrier structure and the second substrate are made of stainless steel, glass, or plastic.

10. The environmental sensitive element package as claimed in claim 8, wherein the barrier structure is disposed on the second substrate and protrudes from the second substrate toward the first substrate.

11. The environmental sensitive element package as claimed in claim 8, further comprising:

a flexible passivation layer covering the flexible buffer layer, wherein the flexible buffer layer is located between the environmental sensitive element and the flexible passivation layer.

12. The environmental sensitive element package as claimed in claim 8, further comprising:

a plurality of passivation films covering the flexible buffer layer.

13. The environmental sensitive element package as claimed in claim 8, further comprising:

a flexible passivation layer covering the flexible buffer layer; and

a plurality of passivation films covering the flexible passivation layer, wherein the flexible passivation layer is between the flexible buffer layer and the plurality of passivation films.

14. The environmental sensitive element package as claimed in claim 8, wherein the outgassing of the adhesive under 120 degrees Celsius ranges from 5×

10<sup>−

8</sup> gram/cm² to 5×

10<sup>−

7</sup> gram/cm².