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Packaging slurry for LED and preparation method thereof

A technology of slurry and epoxy resin, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of discoloration, resin discoloration, and epoxy resin light transmittance decrease, and achieve the effect of improving service life and delaying attenuation

Inactive Publication Date: 2012-09-19
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main component of the existing epoxy resin for LED packaging is bisphenol A epoxy resin. Since the epoxy resin contains an aromatic ring that can absorb ultraviolet rays, it will oxidize to produce carbon groups after absorbing ultraviolet rays and form a chromophore, which will cause the resin to change color. Epoxy resin will also change color when heated, which will cause the light transmittance of epoxy resin to decrease in the near ultraviolet wavelength range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mix 1g of polysuccinic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol) ester with light stabilizer and 100g of epoxy curing agent EP-400B evenly, stir to make it completely Dissolve, then add 100g epoxy resin EP-400A, stir magnetically for 20 minutes, mix well and then vacuum defoam to obtain a modified UV-resistant epoxy resin solution;

[0036] The modified anti-ultraviolet epoxy resin solution of 100g, the TiO of 0.1g 2 (D 50 30nm), 3g of nitrogen oxide green phosphor powder and 7g of nitrogen oxide red phosphor powder were mixed, uniformly mixed for 1 hour under magnetic stirring, and the paste for white LED packaging was obtained.

Embodiment 2

[0038] Mix 0.05g light stabilizer polysuccinate (4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol) ester and 100g epoxy curing agent EP-400B evenly, stir to make it completely Dissolve, then add 100g epoxy resin EP-400A, stir magnetically for 30 minutes, mix well and then vacuum defoam to obtain a modified UV-resistant epoxy resin solution;

[0039] The modified anti-ultraviolet epoxy resin solution of 100g, the TiO of 0.05g 2 (D 50 30nm), 3g of nitrogen oxide green phosphor powder and 7g of nitrogen oxide red phosphor powder were mixed, uniformly mixed for 0.5h under magnetic stirring, and the paste for white LED packaging was obtained.

Embodiment 3

[0041] Mix 1g of light stabilizer polysuccinate (4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol) ester and 100g of epoxy curing agent EP-700B evenly, stir to dissolve completely , then add 100g epoxy resin EP-700A, stir magnetically for 20 minutes, mix well and vacuum defoam to obtain a modified anti-ultraviolet epoxy resin solution;

[0042] The modified anti-ultraviolet epoxy resin solution of 100g, the ZnO(D of 0.08g50 50nm), 4g of aluminate blue phosphor, and 6g of aluminate yellow phosphor were mixed, and uniformly mixed for 5 hours under magnetic stirring to obtain a paste for encapsulating white LEDs.

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PUM

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Abstract

The invention discloses a packaging slurry for an LED and a preparation method thereof. The packaging slurry comprises a modified uvioresistant epoxide resin, an inorganic ultraviolet stabilizer and fluorescent powders, wherein the modified uvioresistant epoxide resin is an improved epoxide resin with the uvioresistant effect; the inorganic ultraviolet stabilizer plays a role of absorbing the ultraviolet light and reducing scattering of the ultraviolet light in the chip in the packaging material; and the fluorescent powders are a luminescent material. The packaging slurry for the LED, which is provided by the invention, can defer the attenuation of the LED and improve the service life of the LED.

Description

technical field [0001] The invention belongs to the technical field of packaging of white light LEDs, and relates to packaging paste for LEDs. Background technique [0002] With the continuous improvement of LED (light-emitting diode) lighting efficiency and the gradual reduction of cost, LED will become the mainstream of light sources for lighting and display by virtue of its long service life. To realize LEDs entering the general lighting and display fields, it is necessary to obtain high-efficiency white LEDs. [0003] White light LED lighting has the absolute advantages of replacing traditional light sources: (1) It has the advantages of environmental protection. LED is solid-state lighting, which does not contain mercury that is harmful to the environment; at the same time, it is DC driven and has no strobe, which is beneficial to eye protection; (2) ) The drive voltage is low, generally less than 3.5V, which can be used in many special occasions; (3) The start-up time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/48
Inventor 王大伟陶淳
Owner IRICO