Technique for coating layer of power type white light LED plane based on water-soluble sensitization glue

A photosensitive adhesive and power-type technology, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of non-repeatable thickness of phosphor powder, poor uniformity of LED light output, limited yield and industrialized mass production, etc., to improve optical uniformity Sexuality and thermal stability, the effect of improving the overall performance
CN101093869AInactive Publication Date: 2007-12-26UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2007-12-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

Plane coat technique includes following steps: (1) preparing organic colloid; (2) preparing solution of photosensitizer; (3) mixing organic colloid with photosensitizer according to proportion, adding a small quantity of dispersant or defoaming agent dispersed to organic colloid evenly to form sensitization system accorded with requirement; (4) preparing suspension of sensitization colloid of containing phosphor powder; mixing phosphor powder with sensitization liquid prepared in step (3) according to proportion, mixing them evenly so as to prepare slurry of phosphor powder; (5) coating the slurry obtained in step (4) on surface of LED chip so as to form coat layer of phosphor powder; dry in the shade or air-dry in darkroom; (6) exposure and develop obtains layer of phosphor powder with plane structure; (7) solidifying layer of phosphor powder with plane structure obtained in step (6) to make physicochemical characteristics stable.
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Description

technical field

[0001] The invention relates to the field of optoelectronic technology, in particular to a power-type white LED plane coating process based on water-soluble photosensitive glue. Background technique

[0002] LED is the abbreviation of light emitting diode. In 1993, a technological breakthrough was made in the blue GaN light-emitting diode, and in 1996, white LED was realized. White LED has the advantages of low voltage drive, low power consumption, high reliability, long life, etc., and is a green lighting source that meets environmental protection and energy saving. Therefore, its appearance has aroused great enthusiasm and great attention from governments and many business companies.

[0003] So far, there are four known ways to achieve white LEDs, one of which is to coat a layer of yellow phosphor (YAG:Ce 3+ ), the yellow phosphor absorbs part of the blue light emitted from the blue LED chip and converts it into yellow light, and the yellow light and th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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