How does Kovar alloy micro-packaging technology solve the "glass-metal expansion dilemma" in 5G photonic devices ?

This breakthrough is directly related to the long-term reliability of the hermetic packaging of optical modules. In the extreme test of 85℃/85%RH, the TO56 tube shell using this material still maintains a helium leakage rate of ≤5×10⁻¹¹ atm·cc/s after 3000 hours of aging, which is significantly better than the MIL-STD-883 standard.

[Application Matrix] From terahertz waveguide to quantum sensor: multi-dimensional packaging scenario verification

1. 5G base station RF front end
The phase compensation structure of Kovar alloy SMP connector is used to successfully control the standing wave ratio (VSWR) within 1.25:1 in the 26GHz band, reducing RF loss by 30% compared with the traditional Fe-Ni alloy solution. Huawei has used this technology in its millimeter wave AAU unit to achieve stable operation of base stations in -52℃ Arctic environment.

2. Satellite laser communication
The customized Kovar shell is equipped with a vacuum sputtering gold layer process, which enables the thermal cycle tolerance of space-grade fiber couplers to break through the limit of -196~+125℃, helping Musk's Starlink satellite to achieve 40Gbps intersatellite laser transmission.

3. Implantable medical devices
The Kovar capillary (ID 0.1mm±0.5μm) prepared by chemical etching achieves zero ion penetration under 12G acceleration vibration in the titanium alloy package of the pacemaker, and has passed the ISO 13485 medical device sealing Class III certification.