Self-sealing inorganic sealing LED light source and inorganic sealing method

By using a triple-dam structure and reflector design, combined with the rheological properties of the sealant, and optimizing the optical coupling medium, the problems of airtightness and low light extraction efficiency in deep ultraviolet LED packaging are solved, achieving highly reliable and long-life all-inorganic packaging.

CN121712170BActive Publication Date: 2026-06-26ZHONGSHAN GUANGSHENG SEMICON TECH CO LTD +1
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Patent Information

Application Number
CN202511888957.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-15
Publication Date
2026-06-26
Estimated Expiration
2045-12-15

AI Technical Summary

Technical Problem

Existing deep ultraviolet LED packaging technology suffers from issues with airtightness and reliability, and has low light extraction efficiency, making it difficult to meet the application requirements of long lifespan and high stability.

Method used

The design employs a triple-dam structure, combining the positioning notch of the reflector cup with the inclined inner top surface, and utilizing the rheological properties of the sealant to achieve self-sealing inorganic welding. The inner surface of the reflector cup is inclined or curved, with added optical coupling medium and optimized optical path design to improve light extraction efficiency.

Benefits of technology

It significantly improves airtightness and light extraction efficiency, ensures long device life and reliability, solves the problems of microcracks and light loss, and achieves high reliability of all-inorganic packaging.

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Abstract

The application discloses a kind of self-sealing inorganic sealing welding LED light source and inorganic sealing welding method, LED light source includes substrate, LED chip and light window, substrate top surface is equipped with electrode layer, welding layer, and LED chip is welded on electrode layer;Light window includes tube shell, lens, and the lower end of tube shell is welded on welding layer;It is equipped with ring cup-shaped light cup around LED chip in tube shell, and the outer side of the bottom surface of light cup is equipped with the positioning gap of opening outward along circumference, and the corresponding position of welding layer is equipped with the positioning dam for cooperating with positioning gap to position light cup, and positioning dam is equipped with the sealing glue for bonding fixed light cup, and part of sealing glue overflow is connected with welding layer and is sealed;Positioning dam includes inner dam, middle dam and outer dam sequentially arranged from inside to outside, and satisfy middle dam height h2>Inner dam height h1≥Outer dam height h3.The application has the advantages of good air tightness and high light extraction efficiency.
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