Early vacuum insulated glass technology relied on glass solder to seal edges and pump-out-ports for vacuum extraction. However, commercialization revealed significant drawbacks, including lengthy production cycles, limited scheduling flexibility, higher risks of leakage due to pump-out-ports, and compromised aesthetics.
The industry has increasingly shifted toward pump-out-port-free vacuum insulated glass, utilizing sealing in a vacuum environment to address these challenges. However, the high melting temperature of commonly used glass solder has made it difficult to manufacture fully tempered glass, failing to meet regulatory standards in many regions. Additionally, the rigidity and brittleness of glass solder joints increase the likelihood of leakage under stress or deformation.
To overcome these limitations, LEADUS developed an innovative low-temperature metallic soldering in vacuum environment process (No pump-out-ports) and, in 2019, became the first to achieve large-scale production globally. This method enables sealing at temperatures far below the annealing point of tempered glass, ensuring compatibility with fully tempered glass. The flexibility and ductility of metallic solder significantly improve durability under stress and deformation, minimizing the risk of leakage. Additionally, sealing in a vacuum environment eliminates the need for individual vacuum pumping, greatly enhancing production efficiency and product aesthetics.
This breakthrough represents a significant advancement in vacuum insulated glass technology, delivering improved performance, faster production, and compliance with international standards.
