Process for making white light diode by using blue light or purple light emitting diode chips

A diode and wafer technology, applied in the field of light-emitting diode preparation, can solve the problems of large loss of phosphor powder, complex process, large particle size of phosphor powder, etc., and achieves the reduction of film-making process, uniform film thickness and low process loss. Effect

Inactive Publication Date: 2004-12-29
天津中环三津有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the sintering temperature is high in the preparation process of europium-iridium aluminum garnet phosphor, generally above 1600-1700 °C, so the phosphor powder formed has a large particle size with a diameter of 5-15 μm and weak adhesion. , and the film thickness is uneven, the yield is low, and the pass rate is generally lower than 70%. In addition, the solid synthesis method requires two heating processes: sintering and powdering, and then combining with LED wafer curing. The process is more complicated, and in During the spraying process of phosphor powder, due to the single LED chip spraying method, the phosphor powder may be sprayed outside the LED chip, so the loss of phosphor powder is large, which increases the manufacturing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) prepare yttrium acetate, europium acetate aqueous solution, in molar ratio, yttrium acetate is 0.997, europium acetate is 0.003, and water is 80; Take by weighing analytical pure yttrium acetate 17.079 grams, analytical pure europium acetate 0.061 grams, water 72.700 grams, Adding yttrium acetate and europium acetate to water at a temperature of 80-85°C to prepare an aqueous solution of yttrium acetate and europium acetate;

[0015] (2) Prepare an aluminum isobutoxide aqueous solution, in molar ratio, the total amount of yttrium acetate and europium acetate in the aqueous solution prepared in (1) is 3, and the amount of anhydrous aluminum isobutoxide is 5, and the analytically pure aluminum After 20.707 grams of aluminum isobutoxide in water, take anhydrous aluminum isobutoxide as 1 and water as 80, and weigh 121.200 grams of water; then add anhydrous aluminum isobutoxide to water at a temperature of 80-85°C to make an aqueous solution;

[0016] (3) Based on the tot...

Embodiment 2

[0021] (1) prepare yttrium acetate, europium acetate aqueous solution, in molar ratio, yttrium acetate is 0.990, europium acetate is 0.010, and water is 90; Take by weighing analytical pure yttrium acetate 16.857 grams, analytical pure europium acetate 0.201 grams, water 81.300 grams, Adding yttrium acetate and europium acetate to water at a temperature of 80-85°C to prepare an aqueous solution of yttrium acetate and europium acetate;

[0022] (2) Prepare an aluminum isobutoxide aqueous solution, in molar ratio, the total amount of yttrium acetate and europium acetate in the aqueous solution prepared in (1) is 3, and the amount of anhydrous aluminum isobutoxide is 5, and the analytically pure aluminum After 20.568 grams of aluminum isobutoxide in water, take anhydrous aluminum isobutoxide as 1 and water as 90, and weigh 135.400 grams of water; then add anhydrous aluminum isobutoxide to water at a temperature of 80-85° C. to make an aqueous solution;

[0023] (3) Based on the t...

Embodiment 3

[0028] (1) prepare yttrium acetate, europium acetate aqueous solution, in mol ratio, yttrium acetate is 0.980, europium acetate is 0.020, and water is 100; Take by weighing analytical pure yttrium acetate 16.538 grams, analytical pure europium acetate 0.398 grams, water 89.600 grams, Adding yttrium acetate and europium acetate to water at a temperature of 80-85°C to prepare an aqueous solution of yttrium acetate and europium acetate;

[0029] (2) Prepare an aluminum isobutoxide aqueous solution, in molar ratio, the total amount of yttrium acetate and europium acetate in the aqueous solution prepared in (1) is 3, and the amount of anhydrous aluminum isobutoxide is 5, and the analytically pure aluminum After 20.398 grams of aluminum isobutoxide in water, take anhydrous aluminum isobutoxide as 1 and water as 100, and weigh 149.200 grams of water; then add anhydrous aluminum isobutoxide to water at a temperature of 80-85°C to make an aqueous solution;

[0030] (3) Based on the tot...

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Abstract

The invention relates to a method for preparing white light emitting diode by employing blue light or purple light emitting diode chips which comprises, fixing the blue light or purple light emitting diode chips onto the bottom of the reaction container, charging in yttrium acetate prepared by a finite proportion, and water solution of europium acetate, dropping in iso-alumium butoxide water solution while keeping at 80-85 deg. C, pH4-6 of solution and presence of mixing, continuing mixing till formation of gel on the surface of the diode, sintering 40 minutes at 850-1100 deg. C, taking out for cutting and packaging.

Description

technical field [0001] The invention relates to a method for preparing a light emitting diode, in particular to a method for preparing a white light emitting diode by using a blue or purple diode chip. Background technique [0002] With the rapid development of semiconductor materials and the emergence of a new generation of light-emitting diodes, as a new type of light source, its power consumption is only 1 / 10 of that of ordinary incandescent lamps, but its life can be extended by 100 times. Due to its energy saving, long life, and maintenance-free , environmental protection and other advantages, so it is the general trend to replace traditional incandescent and fluorescent lamps, especially because white light-emitting diodes can be widely used in home lighting, road traffic lighting, automotive lighting, urban landscape lighting and aviation, ports, stations, stadiums, advertising Display applications such as media, so the market prospect is broad. But at present, the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00
Inventor 张文铭陈亚方
Owner 天津中环三津有限公司
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