Sealed structure, light-emitting device, electronic device, and lighting device

• US 9,214,643 B2
• Filed: 11/27/2012
• Issued: 12/15/2015
• Est. Priority Date: 11/29/2011
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei, Nishido, Yusuke, Nakamura, Daiki
• Primary Examiner(s): Arora, Ajay K
• Application Number:
  US13/686,335
• Publication Number:
  US 20130134397A1
• Time in Patent Office: 1,113 Days
• Field of Search: 257/704, 257/258
• US Class Current: 1/1
• 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: C03C 27/06 Joining glass to glass by processes other than fusing fusing C03B23/20; units for use as elements for closing wall or like openings and comprising two or more parallel glass panes in spaced relationship, the panes being permanently secured together E06B3/66
• CPC Class Codes: H10K 2102/3035 Edge emission
• CPC Class Codes: H10K 50/13 comprising stacked EL layers within one EL unit
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 50/16 Electron transporting layers
• CPC Class Codes: H10K 50/17 Carrier injection layers
• CPC Class Codes: H10K 50/171 Electron injection layers
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: Y10T 428/23 Sheet including cover or casing

Abstract

A sealed structure with high sealing capability, in which a pair of substrates is attached to each other with a glass layer is provided. The sealed structure has a first and second substrates, a first surface of the first substrate facing a first surface of the second substrate, and the glass layer which is in contact with the first and second substrates, defines a space between the first and second substrates, and is provided along the periphery of the first surface of the first substrate. The first substrate has a corner portion. The area of the first surface of the first substrate is smaller than or equal to that of the first surface of the second substrate. In at least one of respective welded regions between the glass layer and the first or second substrate, the width of the corner portion is larger than that of the side portion.

Claims

1. A sealed structure comprising:

a first substrate and a second substrate, a first surface of the first substrate facing a first surface of the second substrate; and

a glass layer which is in contact with the first substrate and the second substrate, defines a sealed space between the first substrate and the second substrate, and is provided along a periphery of the first surface of the first substrate,

wherein the glass layer is seamlessly provided along the periphery of the first surface of the first substrate,

wherein the glass layer comprises a welded region,

wherein the first substrate and the welded region each include a corner portion and a side portion,

wherein an area of the first surface of the first substrate is smaller than or equal to an area of the first surface of the second substrate, and

wherein a width of the corner portion of the welded region is larger than a width of the side portion of the welded region.

2. The sealed structure according to claim 1, wherein at least one of the first substrate and the second substrate comprises a film formed over the first surface thereof.

13. The sealed structure according to claim 1, wherein the glass layer includes a glass material selected from magnesium oxide, calcium oxide, strontium oxide, barium oxide, cesium oxide, sodium oxide, potassium oxide, boron oxide, vanadium oxide, zinc oxide, tellurium oxide, aluminum oxide, silicon dioxide, lead oxide, tin oxide, phosphorus oxide, ruthenium oxide, rhodium oxide, iron oxide, copper oxide, manganese dioxide, molybdenum oxide, niobium oxide, titanium oxide, tungsten oxide, bismuth oxide, zirconium oxide, lithium oxide, antimony oxide, lead borate glass, tin phosphate glass, vanadate glass, and borosilicate glass.

17. The sealed structure according to claim 1,

wherein the first substrate includes a first portion and a second portion,

wherein a thickness of the first portion is larger than a thickness of the second portion,

wherein the first portion is in contact with the glass layer, and

wherein the second portion is not in contact with the glass layer.

3. A sealed structure comprising:

a first substrate and a second substrate, a first surface of the first substrate facing a first surface of the second substrate; and

a glass layer which is in contact with the first substrate and the second substrate, defines a sealed space between the first substrate and the second substrate, and is provided along a periphery of the first surface of the first substrate,

wherein the glass layer is seamlessly provided along the periphery of the first surface of the first substrate,

wherein the glass layer comprises a welded region,

wherein the first substrate and the welded region each include a corner portion,

wherein an area of the first surface of the first substrate is smaller than or equal to an area of the first surface of the second substrate, and

wherein a radius of an outer contour of the corner portion of the welded region is smaller than or equal to a radius of an inner contour of the corner portion of the welded region.

4. The sealed structure according to claim 3, wherein at least one of the first substrate and the second substrate comprises a film formed over the first surface thereof.

14. The sealed structure according to claim 3, wherein the glass layer includes a glass material selected from magnesium oxide, calcium oxide, strontium oxide, barium oxide, cesium oxide, sodium oxide, potassium oxide, boron oxide, vanadium oxide, zinc oxide, tellurium oxide, aluminum oxide, silicon dioxide, lead oxide, tin oxide, phosphorus oxide, ruthenium oxide, rhodium oxide, iron oxide, copper oxide, manganese dioxide, molybdenum oxide, niobium oxide, titanium oxide, tungsten oxide, bismuth oxide, zirconium oxide, lithium oxide, antimony oxide, lead borate glass, tin phosphate glass, vanadate glass, and borosilicate glass.

18. The sealed structure according to claim 3,

wherein the first substrate includes a first portion and a second portion,

wherein a thickness of the first portion is larger than a thickness of the second portion,

wherein the first portion is in contact with the glass layer, and

wherein the second portion is not in contact with the glass layer.

5. A light-emitting device comprising:

a first substrate and a second substrate, a first surface of the first substrate facing a first surface of the second substrate; and

a glass layer which is in contact with the first substrate and the second substrate, defines a region for an object to be sealed between the first substrate and the second substrate, and is provided along a periphery of the first surface of the first substrate,

wherein the glass layer is seamlessly provided along the periphery of the first surface of the first substrate,

wherein the glass layer comprises a welded region,

wherein the first substrate and the welded region each include a corner portion and a side portion,

wherein an area of the first surface of the first substrate is smaller than or equal to an area of the first surface of the second substrate,

wherein the region for the object to be sealed includes a light-emitting element in which a layer containing a light-emitting organic compound is provided between a pair of electrodes, and

wherein a width of the corner portion of the welded region is larger than a width of the side portion of the welded region.

6. The light-emitting device according to claim 5, wherein at least one of the first substrate and the second substrate comprises a film formed over the first surface thereof.

7. An electronic device wherein the light-emitting device according to claim 5 is used in a display portion.

8. A lighting device wherein the light-emitting device according to claim 5 is used in a light-emitting portion.

15. The light-emitting device according to claim 5, wherein the glass layer includes a glass material selected from magnesium oxide, calcium oxide, strontium oxide, barium oxide, cesium oxide, sodium oxide, potassium oxide, boron oxide, vanadium oxide, zinc oxide, tellurium oxide, aluminum oxide, silicon dioxide, lead oxide, tin oxide, phosphorus oxide, ruthenium oxide, rhodium oxide, iron oxide, copper oxide, manganese dioxide, molybdenum oxide, niobium oxide, titanium oxide, tungsten oxide, bismuth oxide, zirconium oxide, lithium oxide, antimony oxide, lead borate glass, tin phosphate glass, vanadate glass, and borosilicate glass.

19. The light-emitting device according to claim 5,

wherein the first substrate includes a first portion and a second portion,

wherein a thickness of the first portion is larger than a thickness of the second portion,

wherein the first portion is in contact with the glass layer, and

wherein the second portion is not in contact with the glass layer.

9. A light-emitting device comprising:

a first substrate and a second substrate, a first surface of the first substrate facing a first surface of the second substrate; and

a glass layer which is in contact with the first substrate and the second substrate, defines a region for an object to be sealed between the first substrate and the second substrate, and is provided along a periphery of the first surface of the first substrate,

wherein the glass layer is seamlessly provided along the periphery of the first surface of the first substrate,

wherein the glass layer comprises a welded region,

wherein the first substrate and the welded region each include a corner portion,

wherein an area of the first surface of the first substrate is smaller than or equal to an area of the first surface of the second substrate,

wherein the region for the object to be sealed includes a light-emitting element in which a layer containing a light-emitting organic compound is provided between a pair of electrodes, and

wherein a radius of an outer contour of the corner portion of the welded region is smaller than or equal to a radius of an inner contour of the corner portion of the welded region.

10. The light-emitting device according to claim 9, wherein at least one of the first substrate and the second substrate comprises a film formed over the first surface thereof.

11. An electronic device wherein the light-emitting device according to claim 9 is used in a display portion.

12. A lighting device wherein the light-emitting device according to claim 9 is used in a light-emitting portion.

16. The light-emitting device according to claim 9, wherein the glass layer includes a glass material selected from magnesium oxide, calcium oxide, strontium oxide, barium oxide, cesium oxide, sodium oxide, potassium oxide, boron oxide, vanadium oxide, zinc oxide, tellurium oxide, aluminum oxide, silicon dioxide, lead oxide, tin oxide, phosphorus oxide, ruthenium oxide, rhodium oxide, iron oxide, copper oxide, manganese dioxide, molybdenum oxide, niobium oxide, titanium oxide, tungsten oxide, bismuth oxide, zirconium oxide, lithium oxide, antimony oxide, lead borate glass, tin phosphate glass, vanadate glass, and borosilicate glass.

20. The light-emitting device according to claim 9,

wherein the first substrate includes a first portion and a second portion,

wherein a thickness of the first portion is larger than a thickness of the second portion,

wherein the first portion is in contact with the glass layer, and

wherein the second portion is not in contact with the glass layer.