Kovar column is precisely manufactured from an iron-nickel-cobalt alloy material. Its thermal expansion coefficient (CTE) is highly compatible with that of alumina, aluminum nitride ceramics, and borosilicate glass. This product is specifically designed for high-reliability gas sealing processes, aiming to effectively alleviate the long-term dimensional drift caused by thermal mismatch of different materials, and to provide a durable and stable physical and chemical protective barrier for internal sensitive electronic components.