Fluorescent composite glass, fluorescent composite glass green sheet and process for production of fluorescent composite glass

A composite glass and manufacturing method technology, applied in the direction of semiconductor devices, electrical components, circuits, etc., can solve the problems of deterioration, poor weather resistance, and inability to make thickness, etc., and achieve the effect of reducing shrinkage and deformation, thin thickness, and small thickness

Inactive Publication Date: 2008-04-30
NIPPON ELECTRIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the SnO disclosed in Patent Document 1 2 -P 2 o 5 Non-lead-based low-melting-point glass such as TeO-based glass or TeO-based glass has poor weather resistance and has the problem of deteriorating due to strong reaction with phosphors.
[0010] In addition, since the phosphor composite glass disclosed in the description of Patent Document 2 is a glass that is pressurized to form glass powder and inorganic phosphor powder and then fired, it cannot be made into a thin product, and it cannot be expected to improve its luminescence. efficiency problem
In addition, in press molding, there is also a problem that it is not possible to manufacture large and uniform thickness products at low cost.

Method used

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  • Fluorescent composite glass, fluorescent composite glass green sheet and process for production of fluorescent composite glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Hereinafter, the present invention will be described in detail based on examples.

[0072] First, a phosphor composite glass green sheet was produced as follows.

[0073] In terms of composition, it is calculated by mass percentage, containing SiO 2 50%, B 2 o 3 5%, CaO 10%, BaO 25%, Al 2 o 3 5%, ZnO 5% composition method, mixed glass raw materials of various oxides. After being uniformly mixed, the mixture was charged into a platinum crucible and melted at 1400° C. for 2 hours to produce a uniform glass. The resulting glass was pulverized with alumina balls and classified to obtain a glass powder having an average particle diameter of 2.5 µm. Next, to the prepared glass powder, an inorganic phosphor powder (average particle size of YAG phosphor powder manufactured by Kasei Obutonics Co., Ltd.: 8 μm) was added and mixed at a mass ratio of 95:5 to obtain a mixed powder. . Next, 30% by mass of methacrylic resin as a binder, 3% by mass of dibutyl phthalate as a p...

Embodiment 2

[0079] First, the phosphor composite glass green sheet produced in Example 1, and a porous ceramic mullite substrate as a constraining member were prepared.

[0080] Next, cut the mullite substrate and phosphor composite glass green sheet into a size of 100×100 mm. As shown in FIG. 2 , four mullite substrates and three phosphor composite glass green sheets were stacked on top of each other, and bonded by thermocompression to form an integrated body to produce a laminate. Then, it was fired at 900°C. Thereafter, the mullite substrate was removed, and three phosphor composite glasses with a size of 100×100 mm and a thickness of 40 μm were produced.

[0081] The thus-produced phosphor composite glass was irradiated with blue light from the back of the phosphor glass to obtain white transmitted light. Furthermore, the energy conversion efficiency and porosity were also measured, and the energy conversion efficiency was 13%, and the porosity was 2%.

Embodiment 3

[0083] Contains ZnO 35%, B in terms of mass percentage 2 o 3 40%, SiO 2 10%, Na 2 O 10%, Al 2 o 3 5% of the composition of the glass raw materials to reconcile various oxides. After being uniformly mixed, it was placed in a platinum crucible and melted at 1100° C. for 2 hours to obtain a uniform glass. The obtained glass was pulverized with alumina balls and classified to obtain glass powder with an average particle diameter of 2.5 μm. Next, to the obtained glass powder, an inorganic phosphor powder (average particle size of YAG phosphor powder manufactured by Kasei Obtonix Co., Ltd.: 8 μm) was added and mixed at a mass ratio of 95:5 to prepare a mixed powder. Next, 30% by mass of methacrylic resin as a binder, 3% by mass of dibutyl phthalate as a plasticizer, and 20% by mass of toluene as a solvent were added to the obtained mixed powder 100, and mixed , making slurry. Next, a sheet was formed on the PET film by the doctor blade method, and dried to produce a phosph...

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Abstract

This invention provides a fluorescent substance composite glass, which is chemically stable, has a large size and a small thickness, is uniform in thickness, and, at the same time, has a high energy conversion efficiency, and a fluorescent substance composite glass green sheet and a process for prooducing a fluorescent substance composite glass. The fluorescent substance composite glass is produced by baking a mixture comprising a glass powder and an inorganic fluorescent substance powder and is characterized in that, when light having a luminescence peak in a wavelength region of 350 to 500 nm is applied, the efficiency of conversion of energy to a visible light wavelength region of 380 to 780 nm is not less than 10%.

Description

technical field [0001] The present invention relates to a phosphor composite glass, a phosphor composite glass green sheet, and a method for manufacturing the phosphor composite glass. Background technique [0002] In recent years, white LEDs have been expected to be used in lighting applications as light sources in the next century to replace incandescent lamps and fluorescent lamps. [0003] In LED elements that use phosphors for wavelength conversion, phosphor powder is mixed with molding resins such as organic binder resins that seal the light-emitting surface of the LED chip, and molded to absorb part or all of the light emitted by the LED chip to perform the desired process. wavelength conversion. [0004] However, the molding resin constituting the LED element described above has a problem of being degraded by high-output short-wavelength light in the blue to ultraviolet region, causing discoloration. [0005] In order to solve the above problems, in Patent Document...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24C03C3/064C03C3/066C03C3/089C03C3/091C03C3/093C03C3/14H01L33/00
Inventor 岩尾克马屋原芳夫
Owner NIPPON ELECTRIC GLASS CO LTD
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