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Glass coating containing fluorophor and method for producing glass coating, and light-emitting device and method for manufacturing light-emitting device

A technology of glass coating and manufacturing method, which is applied in the direction of electric solid-state devices, semiconductor devices, electrical components, etc., and can solve problems such as the decrease of light efficiency of devices and the deterioration of luminescent characteristics of phosphors

Active Publication Date: 2012-08-15
镇江瑞吉光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a method for manufacturing a glass coating containing phosphors. The glass coating containing phosphors is manufactured on a glass substrate, so as to effectively solve the above-mentioned light-efficiency problems in the light-emitting devices manufactured by using the traditional LED packaging process. degradation and degradation of phosphor emission characteristics, etc.

Method used

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  • Glass coating containing fluorophor and method for producing glass coating, and light-emitting device and method for manufacturing light-emitting device
  • Glass coating containing fluorophor and method for producing glass coating, and light-emitting device and method for manufacturing light-emitting device
  • Glass coating containing fluorophor and method for producing glass coating, and light-emitting device and method for manufacturing light-emitting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Glass A is ordinary soda-lime glass with a thickness of 1 mm, a refractive index of about 1.52 at a wavelength of 460 nm, and a glass transition temperature of 570 o C, softening temperature 620 o C;

[0061] Glass B is a low-melting phosphate glass whose components contain P 2 o 5 : 41%, ZnO: 34%, B 2 o 3 : 19%, (Li 2 O 3% + Na 2 O 1.5% + K 2 O 1.5%): 6%. The refractive index is about 1.49 at a wavelength of 460 nm, and the glass transition temperature is 480 o C, the softening temperature is 526 o C;

[0062] Phosphor C is YAG yellow phosphor, and its particle size distribution is d 50 to 10 microns.

[0063] Glass B is pulverized by jet milling equipment, and its particle size distribution is d 50 =15 microns.

[0064] Mix 20 grams of glass B powder with 3.5 grams of YAG yellow fluorescent powder and 4 grams of organic liquid (a mixture of terpineol and butyral resin, the mass ratio is 6:1) to obtain a paste. To the extent that the object of the prese...

Embodiment 2

[0071] The difference between this example and Example 1 is that 20 grams of glass B powder is mixed with 3.5 grams of YAG yellow fluorescent powder and 4.5 grams of organic liquid (a mixture of terpineol and ethyl cellulose, the mass ratio is 6.6:1). Refined to obtain a paste.

[0072] The sintering process in the present embodiment is: the glass plate that has been coated with paste is heated at 170 o C to dry for 1 hour, then cool to room temperature first. Take 1 hour to raise the temperature to 450 o C keep warm for 1 hour, then quickly heat up to 550 in 21 minutes o C for 1 hour, and then cooled to room temperature for 2 hours. In this way, a glass coating containing phosphors was obtained on the glass A substrate.

[0073] The glass coating containing the phosphor in this embodiment is transparent after sintering, with a smooth surface and no warped edges.

[0074] Using a blue light chip grown on a 1W SiC substrate, the blue light emitted by the blue light chip ir...

Embodiment 3

[0076] The difference between this example and Example 1 is that 20 grams of glass B powder and 0.2 grams of YAG yellow fluorescent powder plus 4 grams of organic liquid (a mixture of terpineol and butyral resin, the mass ratio is 6:1) were mixed Obtain a paste.

[0077] The glass coating containing the phosphor in this embodiment is transparent after sintering, with a smooth surface and no warped edges.

[0078]Using a blue light chip grown on a 1W SiC substrate, the blue light emitted by the blue light chip irradiates the glass A substrate with the glass B coating containing phosphors, and a bluish white light (135 lm / W) is obtained. This is because a small part of the blue light emitted by the blue light chip is absorbed by the fluorescent glass and emits yellow light, while the remaining blue light is more transmitted, and the total mixed light lacks yellow light components.

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Abstract

The invention relates to a glass coating containing a fluorophor and a method for producing the glass coating, and a light-emitting device containing the glass coating and a method for manufacturing the light-emitting device. The method for producing the glass coating containing the fluorophor comprises the following steps of: (1) mixing the powder of glass B and the powder of fluorophor C, an organic solvent and a binder in a mass ratio of 100: (1-100): 150 together into even paste; (2) evenly spreading the paste on a glass substrate A, and drying the glass substrate A coated with the paste so that the organic solvent is completely volatilized; and (3) sintering the dried glass substrate A coated with the paste, thereby obtaining the glass coating containing the fluorophor on the surface of the glass substrate A, wherein the process of sintering is as follows: increasing the temperature to temperature D1, so that the binder is decomposed and volatilized completely, and then increasing the temperature to temperature D2 so that the powder of glass B is softened and united to form a continuous glass body, thus obtaining the glass coating containing the fluorophor C on the surface of the glass substrate A.

Description

technical field [0001] The present invention relates to a glass coating containing a phosphor and a method for producing the same, a light emitting device containing the glass coating and a method for producing the same. Background technique [0002] As a new type of lighting source, white light LED has many advantages such as energy saving, environmental protection and long life. Its working principle is to use the combination of blue light chip and yellow phosphor powder (or other combination methods) to obtain white light. [0003] At present, the LED is mainly packaged by mixing silica gel or resin with phosphor powder. This packaging method has many disadvantages, as follows: [0004] After a long period of light or heat environment, the silica gel or resin will deteriorate and turn yellow, which will affect the light extraction efficiency of the LED; [0005] The poor heat dissipation of the LED device leads to an increase in the operating temperature, which will cau...

Claims

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Application Information

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IPC IPC(8): C03C17/04H01L33/48H01L33/50H01L33/64
CPCH01L2224/48091
Inventor 钱志强金正武
Owner 镇江瑞吉光电科技有限公司
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