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A method for preparing fluorescent glass sheets for LED packaging by screen printing

A technology of LED encapsulation and screen printing, which is applied in the field of materials science, can solve problems affecting the quality and life of LED lamps, rapid aging, color drift, etc., to reduce the occurrence of fluorescent dead spots, good heat dissipation performance, and high temperature The effect of stable luminous performance

Active Publication Date: 2019-10-01
LIANYUNGANG HONGYANG QUARTZ PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional epoxy resin packages cause rapid aging and yellowing due to high-power chip heating, resulting in color drift, which seriously affects the quality and life of LED lamps.

Method used

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  • A method for preparing fluorescent glass sheets for LED packaging by screen printing
  • A method for preparing fluorescent glass sheets for LED packaging by screen printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Press the set amount B 2 O 3 , SiO 2 , Na 2 O, ZnO and TiO 2 The mole percentage of weighing B 2 O 3 , SiO 2 , Na 2 O, ZnO and TiO 2 The borosilicate glass matrix material, in which the mole percentage of each component of the glass matrix is: B 2 O 3 : 40%, SiO 2 : 10%, Na 2 O: 7%, ZnO: 30%, TiO 2 : 13%, and mix evenly.

[0018] (2) Put the ground mixture into a corundum crucible and melt it at 1100°C for 30-40 minutes, pour the resulting melt into distilled water for water quenching, dry, and ball mill to a glass with a particle size of 10-15μm Powder for use

[0019] (3) Preparation of glass paste containing phosphor, Ce: YAG powder occupies 2wt% of the total mass of the glass powder. The binder is terpineol and ethyl cellulose, the former accounts for 70wt% of the total mass of the glass powder, the latter accounts for 20wt% of the total mass of the glass powder, and the dispersant is polyacrylamide, which accounts for 8wt% of the total mass of the glass powder;

[00...

Embodiment 2

[0023] (1) Press the set amount B 2 O 3 , SiO 2 , Na 2 O, ZnO and TiO 2 The mole percentage of weighing B 2 O 3 , SiO 2 , Na 2 O, ZnO and TiO 2 The borosilicate glass matrix material, in which the mole percentage of each component of the glass matrix is: B 2 O 3 : 45%, SiO 2 :5%, Na 2 O: 8%, ZnO: 20%, TiO 2 : 12%, and mix evenly.

[0024] (2) Put the ground mixture into a corundum crucible and melt it at 1100°C for 40 minutes. Pour the resulting melt into distilled water for water quenching, dry, and ball mill to a glass powder with a particle size of 10~15μm. use;

[0025] (3) Ce: YAG powder accounts for 6wt% of the total mass of glass powder. The binder is terpineol and ethyl cellulose, the former accounts for 70wt% of the total mass of the glass powder, the latter accounts for 15wt% of the total mass of the glass powder, and the dispersant is polyacrylamide, accounting for 9wt% of the total mass of the glass powder;

[0026] (4) Stir the mixed slurry at 70-90°C for 30-60 minutes ...

Embodiment 3

[0029] (1) Press the set amount B 2 O 3 , SiO 2 , Na 2 O, ZnO and TiO 2 The mole percentage of weighing B 2 O 3 , SiO 2 , Na 2 O, ZnO and TiO 2 The borosilicate glass matrix material, in which the mole percentage of each component of the glass matrix is: B 2 O 3 : 35%, SiO 2 : 15%, Na 2 O: 9%, ZnO: 33%, TiO 2 : 8%, and mix evenly.

[0030] (2) Put the ground mixture into a corundum crucible and melt it at 1100°C for 40 minutes. Pour the resulting melt into distilled water for water quenching, dry, and ball mill to a glass powder with a particle size of 10~15μm. use;

[0031] (3) Ce: YAG powder accounts for 8wt% of the total mass of glass powder. The binder is terpineol and ethyl cellulose, the former accounts for 75wt% of the total mass of the glass powder, the latter accounts for 10wt% of the total mass of the glass powder, and the dispersant is polyacrylamide, accounting for 7wt% of the total mass of the glass powder;

[0032] (4) Stir the mixed slurry at 70-90°C for 30-60 minutes...

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Abstract

The invention discloses a method for preparing a fluorescent glass sheet for LED packaging by adopting a silk-screen printing method. The method comprises the steps of weighing B2O3, SiO2, Na2O, ZnO and TiO2 according to the mole percentage, mixing, putting the ground mixture into a crucible for melting, pouring the obtained melt into distilled water for water quenching, carrying out drying and ball-milling into glass powder for later use; preparing glass paste containing fluorescent powder, wherein the glass paste is prepared from the fluorescent powder, an adhesive and a dispersing agent; stirring the mixed glass paste containing the fluorescent powder and forming evenly mixed coating paste; and coating one side surface of an ultra-white glass substrate with the prepared coating paste by adopting silk-screen printing, then coating ultra-white glass coated with the coating paste in an air atmosphere for overall heat treatment and finally preparing the fluorescent glass sheet for LED packaging. The fluorescent glass sheet has the advantages of good heat dissipation performance, energy conservation and moisture resistance as a fluorescent conversion material of an LED with white light.

Description

Technical field [0001] The invention belongs to the field of materials science and relates to LED packaging technology, and specifically is a method for preparing fluorescent glass sheets for LED packaging by using a screen printing method. Background technique [0002] White light-emitting diodes (WLEDs) have significant advantages such as long life, low energy consumption, no pollution, high efficiency, and small size, and have broad application prospects in the field of lighting and display. For high-power LEDs, its power can reach the watt level, and the chip's operating current is above 350mA, so higher requirements are placed on packaging materials and technology. Traditional epoxy resin encapsulation causes rapid aging and yellowing due to the heating of high-power chips, resulting in color drift, which seriously affects the quality and life of LED lamps. [0003] The new type of fluorescent glass sheet is an effective way to solve high-power LED packaging. It combines remo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C12/00C03C17/00
Inventor 赵国营房永征金文田徐玲芝刘玉峰侯京山张娜邹军
Owner LIANYUNGANG HONGYANG QUARTZ PROD
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