Method for coating quickly-solidified white LED fluorescent glue

Abstract

The invention discloses a method for coating quickly-solidified white LED fluorescent glue. The method comprises the steps of preparing the fluorescent glue, and conducting deaeration treatment on the evenly-stirred fluorescent glue; pointing the fluorescent glue and evenly spraying the fluorescent glue going through the deaeration treatment to a support; quickly solidifying the fluorescent glue after pointing the fluorescent glue, wherein the quick solidifying step concretely comprises the step of placing a heating block above the support where the fluorescent glue is pointed to heat from top to bottom, heating temperature is 100-180 DEG C, and heating time is 1-5 minutes. By the adoption of the technical scheme, the ceramic heating block is used for solidifying from top to bottom, silica gel is solidified first, then, heat is conducted to air in insulation layer adhesion agent white oil, the air can not form bubbles, and the bubble defective ratio is less then 10%, so that the bubble defective ratio is greatly reduced; the distance between the ceramic heating block and the fluorescent glue on the support is very short, so that the fluorescent glue can be quickly solidified in the 1-5 minutes, and the salification time in the prior art is greatly reduced.

Description

technical field [0001] The invention relates to a white light LED fluorescent glue coating process, in particular to a fast-curing white light LED fluorescent glue coating method. Background technique [0002] The production process of the traditional white LED is mainly to use blue chips and yellow fluorescent glue to heat and cure in the oven. The general specific process is as follows: figure 1 As shown, first point the fluorescent glue; then conduct the first intermediate test, and repeatedly replenish glue for unqualified products to meet the specifications of qualified products; then conduct the first sintering of qualified products (sintering is a fluorescent glue curing process, in It is also called curing in many places outside), and then the second intermediate test is carried out, and the unqualified products are repeatedly filled with glue, mid-test, and sintered until they are qualified. (Replenish the glue; then perform the second sintering, and then conduct t...

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Problems solved by technology

[0003] 1. In mass production, the residence time after dispensing is inconsistent, and the degree of fluorescent glue sedimentation is different;

[0004] 2. The heat conduction speed of the oven is slow, the temperature of the product rises slowly, and the flow of fluorescent glue is chaotic during the heating process

In the above two patents, although the color uniformity of white light LEDs in all directions has been improved to a certain extent, they are all heated by a heating table for rapid curing. Layer + adhesive + white oil, when the heating table is cured, the air in the middle of these layers will expand into the silica gel due to heat, forming a large number of honeycomb air bubbles. 100%, causing great trouble to users

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