Kovar Seal Rings & Frames for Hermetic Packaging

• Material Specification: Manufactured from high-purity Kovar (ASTM F-15) Iron-Nickel-Cobalt alloy for optimal metallurgical stability.
• CTE Matching: Precisely matched thermal expansion characteristics to Alumina (Al₂O₃) and Borosilicate glass for zero-stress thermal cycling.
• Manufacturing Precision: Advanced high-speed stamping and CNC machining achieving strict dimensional tolerances of ±0.05mm or better.
• Thermal Processing: Controlled stress-relief annealing ensures structural integrity and prevents stress fractures during subsequent sealing processes.
• Hermeticity Compliance: Creates robust frameworks capable of consistently exceeding the stringent fine/gross leak rate requirements of MIL-STD-883.
• Surface Readiness: Superior surface finish and purity provide an ideal, defect-free foundation for downstream plating, seam welding, or brazing.

• Optical Communication (e.g., Butterfly Packages)
• TO-Can Style Transistor Packages
• Hybrid Microcircuit (HIC) Enclosures
• Microwave and RF Module Packages
• Vacuum Windows and Feedthroughs
• Sensor and Detector Housings

As a high-volume manufacturing partner for mission-critical packaging, Sanjin combines rigorous material science with precision engineering. Our deep expertise in Kovar stamping and thermal processing allows us to produce seal rings and frames with absolute dimensional consistency at scale. By providing a defect-free structural foundation, we enable your automated assembly lines to achieve maximum yields in glass-to-metal sealing (GTMS) and hermetic brazing operations.