Composite substrate

Patent metadata

Field	Value
Publication number	US-9428417-B2
Application number	US-201214131770-A
Country	US
Kind code	B2
Filing date	Jul 12, 2012
Priority date	Jul 13, 2011
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

Provided is a composite substrate, including a glass sheet and a resin sheet bonded to each other, in which the glass sheet has a refractive index nd of 1.55 or more and 2.3 or less and the resin sheet has a refractive index nd of 1.55 or more and 2.3 or less.

First claim

The invention claimed is:

1. A composite substrate, comprising a glass sheet and a resin sheet bonded to each other,
wherein the glass sheet has a refractive index nd of 1.55 or more and 2.3 or less, and the glass sheet has a molar ratio (MgO+CaO+SrO+BaO)/(La 2 O 3 +Nb 2 O 5 +BaO+TiO 2 +ZrO 2 ) of 1.16 to 4,
the resin sheet has a refractive index nd of 1.55 or more and 2.3 or less, and
the composite substrate has a haze value of 30% or more.

2. The composite substrate according to claim 1 , wherein the glass sheet comprises, as a glass composition in terms of mol %, 10 to 70% of SiO 2 , 0 to 10% of B 2 O 3 , 0.1 to 60% of SrO+BaO+La 2 O 3 +Nb 2 O 5 , 0 to 35% of La 2 O 3 , and 0 to 15% of Li 2 O+Na 2 O+K 2 O, has a molar ratio (MgO+CaO+SrO+BaO)/(La 2 O 3 +Nb 2 O 5 +BaO+TiO 2 +ZrO 2 ) of 1.16 to 4, has a strain point of 600° C. or more, and has a refractive index nd of 1.55 to 2.3.

3. The composite substrate according to claim 1 , wherein the glass sheet is formed of glass having a liquidus temperature of 1,250° C. or less.

4. The composite substrate according to claim 1 , wherein the glass sheet is formed of glass having a liquidus viscosity of 10 35 dPa·s or more.

5. The composite substrate according to claim 1 , wherein the glass sheet is formed by an overflow down-draw method.

6. The composite substrate according to claim 1 , wherein the glass sheet has at least one surface having a surface roughness Ra of 10 nm or less.

7. The composite substrate according to claim 1 , wherein the glass sheet has a thickness of 0.2 mm or more and 2.0 mm or less.

8. The composite substrate according to claim 1 , wherein the glass sheet is formed of glass having a density of 4.0 g/cm 3 or less.

9. The composite substrate according to claim 1 , wherein a size of the glass sheet is 100 mm or more in width and 100 mm or more in length.

10. The composite substrate according to claim 1 , wherein the resin sheet is formed of at least one material selected from the group consisting of polyvinyl chloride, polyvinylidene chloride, polystyrene, a styrene-acrylonitrile copolymer, polyester, polyamide, polyimide, polyurethane, an epoxy resin, polycarbonate, and an acrylic resin.

11. The composite substrate according to claim 1 , wherein the resin sheet has at least one surface in which an uneven structure is formed.

12. The composite substrate according to claim 1 , wherein the resin sheet has at least one surface having a surface roughness Ra of 0.5 nm or more.

13. The composite substrate according to claim 1 , wherein the resin sheet has a thickness of 0.01 to 3 mm.

14. The composite substrate according to claim 1 , further comprising an adhesive layer between the glass sheet and the resin sheet, wherein the adhesive layer has a thickness of 100 μm or less.

15. The composite substrate according to claim 1 , wherein the composite substrate has a value of (the refractive index nd of the resin sheet)−(the refractive index nd of the glass sheet) of 0.001 to 0.1.

16. The composite substrate according to claim 1 , wherein the haze value is 50% or more.

17. The composite substrate according to claim 1 , wherein the composite substrate is used in a lighting device.

18. The composite substrate according to claim 1 , wherein the composite substrate is used in an OLED lighting device.

19. The composite substrate according to claim 1 , wherein the composite substrate is used in an OLED display.

Assignees

• Yanase Tomoki
• MUSHIAKE Atsushi
• Murata Takashi
• Miwa Shinkichi
• Nippon Electric Glass Co

Inventors

• Yanase Tomoki
• MUSHIAKE Atsushi
• Murata Takashi
• Miwa Shinkichi

Classifications

• B32B2457/206

  Organic displays, e.g. OLED · CPC title

• B32B7/023

  Optical properties · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B17/10706

  being photo-polymerized · CPC title

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title