Sealing material

Patent metadata

Field	Value
Publication number	US-9708213-B2
Application number	US-201415026322-A
Country	US
Kind code	B2
Filing date	Oct 20, 2014
Priority date	Oct 21, 2013
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

Provided is a sealing material that easily converts laser light to thermal energy, exhibits satisfactory fluidity, and is conducive to a reduction in its melting point. The sealing material includes 54.9 vol % to 99.9 vol % of glass powder, 0 vol % to 45 vol % of refractory filler powder, and 0.1 vol % to 10 vol % of a laser absorbing material, in which the glass powder includes as a glass composition, in terms of the following oxides in mass %, 70% to 90% of Bi 2 O 3 , 2% to 12% of B 2 O 3 , 1% to 15% of ZnO, 0.2% to 15% of CuO+Fe 2 O 3 , and 0.1% to 20% of MgO+CaO+SrO+BaO.

First claim

The invention claimed is:

1. A sealing material, comprising 54.9 vol % to 97 vol % of glass powder, 0 vol % to 45 vol % of refractory filler powder, and 3 vol % to 25 vol % of a laser absorbing material,
wherein the glass powder comprises as a glass composition, in terms of the following oxides in mass %, 70% to 90% of Bi 2 O 3 , 2% to 12% of B 2 O 3 , 1% to 15% of ZnO, 0.2% to 15% of CuO+Fe 2 O 3 , and 0.1% to 20% of MgO+CaO+SrO+BaO.

2. The sealing material according to claim 1 , wherein the glass powder comprises as the glass composition 4 mass % or more of CuO+Fe 2 O 3 .

3. The sealing material according to claim 1 , wherein the glass powder has a molar ratio BaO/ZnO of from 0.01 to 2 in the glass composition.

4. The sealing material according to claim 1 , wherein the glass powder has a molar ratio Bi 2 O 3 /B 2 O 3 of 1.6 or more in the glass composition.

5. The sealing material according to claim 1 , wherein the glass powder has a molar ratio Bi 2 O 3 /ZnO of 1.55 or more in the glass composition.

6. The sealing material according to claim 1 , wherein the glass powder comprises as the glass composition 0.1 mass % or more of BaO.

7. The sealing material according to claim 1 , wherein the glass powder comprises as the glass composition 5 mass % or more of CuO+Fe 2 O 3 , and has a molar ratio Bi 2 O 3 /B 2 O 3 of 1.5 or less and a molar ratio BaO/ZnO of 0.7 or more in the glass composition.

8. The sealing material according to claim 1 , wherein the refractory filler powder comprises one or more selected from the group consisting of cordierite, willemite, alumina, zirconium phosphate, zircon, zirconia, and tin oxide.

9. The sealing material according to claim 1 , wherein the laser absorbing material comprises one or more selected from the group consisting of a Cu-based oxide, an Fe-based oxide, a Cr-based oxide, a Mn-based oxide, and composite oxides thereof.

10. The sealing material according to claim 1 , wherein the laser absorbing material has an average particle diameter D 50 of from 0.01 μm to 3 μm.

11. The sealing material according to claim 1 , wherein the sealing material is substantially free of PbO.

12. The sealing material according to claim 1 , wherein the sealing material has a softening point of 500° C. or less.

13. The sealing material according to claim 1 , wherein the sealing material is used for sealing treatment with laser light.

14. The sealing material according to claim 1 , wherein the sealing material is used for sealing an OLED device or a solar cell.

Assignees

• Nippon Electric Glass Co

Inventors

• Shiragami Toru
• Ishihara Kentaro

Classifications

• H10F19/00

  Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules · CPC title

• C03C3/145

  containing aluminium or beryllium · CPC title

• B23K26/211

  with interposition of special material to facilitate connection of the parts · CPC title

• C03C8/04

  containing zinc · CPC title

• H01L51/5246

  Electricity · mapped topic