A kind of LED bracket with moisture-proof performance, LED device and preparation method thereof

Abstract

The invention discloses an LED bracket with good moisture-proof performance, an LED device and a preparation method thereof. The LED bracket comprises as a first pad and a second pad as conductive pins and reflective cups arranged on the pads. The first pad and the second pad are connected through an insulation block. The contact surfaces of the first pad and the second pad with the bottoms of the reflective cups are provided with metal lugs, and the metal lugs and the pads are integrally formed. Reflective side walls are formed by the inner side walls of the metal lugs and the inner walls of the reflective cups. The upper surfaces of the metal lugs are tightly attached with outer side walls and the bottom of the reflective cup, the outer side walls of the metal lugs are tightly attached with the bottoms of the reflective cups. The first pad and the second pad are also provided with water-adsorbing grooves which are arranged around the periphery of the metal lugs. Water-adsorbing material layers are filling the water-adsorbing grooves and are covered by the bottoms of the reflective cups. According to the LED bracket with good moisture-proof performance, the LED device and the preparation method, double water resistance with the use of the metal lugs and the water-adsorbing material layers in the water-adsorbing grooves is used, and the LED bracket and a package device with good moisture-proof performance and high reliability are obtained.

Description

technical field [0001] The invention belongs to the technical field of LEDs, and in particular relates to an LED bracket with moisture-proof performance, an LED device and a preparation method thereof. Background technique [0002] The packaging structure of Surface Mounted Devices (SMD) fits the lm / $ LED development trend because of its small size, suitable for mass production, high cost performance, and compatibility with mature surface mount technology (SMT). extensive customer support. When the driving power of a single LED light source increases, the heat increases significantly. In order to maintain the photoelectric conversion efficiency of the LED chip, it is necessary to maintain a low junction temperature. [0003] In order to achieve the above purpose, bracket companies try to increase the area of ​​the bracket cooling block to improve heat dissipation, so a SMD bracket called a flat structure has become the mainstream structure. Such as figure 1 As shown, 100 ...

AI Technical Summary

Problems solved by technology

After water vapor penetrates into the LED bowl, it adheres to the gold wire of the LED, corrodes the gold wire, increases the contact resistance, and increases the VF; at the same time, the water vapor will corrode the silver-plated layer, affecting the connection between the second welding of the gold wire and the silver-plated layer of the bracket. The binding force, resulting in LED dead light

[0005] In addition, for the LED flat-panel structure bracket light source injection molded by nylon-based polymers (PPA, PA9T, PA6T, PA), the light and heat generated by the LED chip directly contact the polymer when the power is turned on, making the polymer resin Degradation, the heat resistance of the insulating reflective cavity of the LED bracket is reduced, and yellowing and blackening gradually occur, resulting in the failure of the LED light source

Especially high-energy LED chips such as ultraviolet LEDs have exacerbated the deterioration of LED nylon-based polymer plastic brackets

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