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White LED (Light-Emitting Diode) nano-phosphor powder

A technology of nano-phosphor and phosphor, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of affecting LED speed, discontinuous emission spectrum, poor light uniformity, etc., and achieves easy degassing, increased luminous flux, and high transparency. The effect of light rate

Inactive Publication Date: 2016-09-07
安徽众博新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the uniformity of the light emitted by the phosphor LED used for LED packaging is poor, and there are problems such as discontinuous emission spectrum, low color rendering, and low light efficiency, which seriously affect the speed of LED entering the lighting field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1, a white light LED nano-phosphor powder, including nano-amorphous silicon nitride powder and phosphor powder, the weight percentage of the nano-amorphous silicon nitride powder in the phosphor powder is 25-35%, and its coating The method is to first put the nano-amorphous silicon nitride powder and the phosphor into a high-speed masher to stir and granulate to obtain the composite phosphor, and then add the composite phosphor and the thermal conductive glue to the rubber mixing machine at a weight ratio of 1:3 The mixing temperature is 110-120℃, and the mixing time is 30-45 minutes. After uniform mixing, vacuum until no bubbles are visible to obtain fluorescent glue. After fixing the LED chip on the base, The LED bracket is filled with fluorescent glue so that the fluorescent glue covers the LED chip, and placed on a horizontal surface for 40-55 minutes, and the composite fluorescent powder is attached to the surface of the LED chip by gravity. The nano-amor...

Embodiment 2

[0012] In Embodiment 2, in the white LED nano-phosphor powder described in Embodiment 1, the weight percentage of the nano-amorphous silicon nitride powder in the phosphor powder is 30-35%.

Embodiment 3

[0013] Embodiment 3, in the white LED nano-phosphor powder described in embodiment 1 or 2, the weight percentage of the nano-amorphous silicon nitride powder in the phosphor powder is 30%.

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PUM

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Abstract

This invention discloses a white LED nano-phosphor powder. The nano-phosphor powder comprises nano-amorphous silicon nitride powder body and phosphor powder; the weight of the nano-amorphous silicon nitride powder body is 25 to 35 percentage of the weight of the phosphor powder. The nano-phosphor powder is prepared by the following steps: stirring and prilling the nano-amorphous silicon nitride powder body and the phosphor powder; after obtaining compound phosphor powder, preparing phosphor glue; covering the phosphor glue on a LED chip; and adhering the compound phosphor power on the surface of the LED chip by the gravity. Thus, the white LED nano-phosphor powder has high refractive index and high light transmittance, can protect the LED chip and increase the luminous flux of the LED, has small viscosity, is easy to defoam, is suitable for filling and compression molding, and makes the LED get better durability and reliability.

Description

Technical field [0001] The invention relates to the technical field of flip chip LED packaging, in particular to a white light LED nano phosphor. Background technique [0002] The light-emitting diode is a new light source for lighting in the 21st century. It has the advantages of high light efficiency, low working voltage, small power consumption, and small size. It can be packaged in a flat surface, has a solid structure and a long life. The light source itself does not contain harmful substances such as mercury and lead, no infrared and ultraviolet pollution, and no pollution to the outside world during production and use. Therefore, from the perspective of saving energy and reducing greenhouse gas emissions, or from the perspective of reducing environmental pollution, it will be a general trend to develop new lighting sources for LRD to replace traditional lighting appliances. However, the existing phosphors for LED packaging have poor light uniformity, and have problems suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50
CPCH01L33/502
Inventor 高桂林董倩
Owner 安徽众博新材料有限公司
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