Vacuum Heat Treatment of 4J29 Iron-Nickel Alloy Sheet for Semiconductor Applications

1. Importance of Heat Treatment for Iron-Nickel Alloy Sheets

The 4J29 iron-nickel-cobalt alloy, also known as Kovar, is a precision material widely used in the semiconductor and electronic packaging industry. Its key feature is a thermal expansion coefficient closely matching borosilicate glass, which allows reliable glass-to-metal sealing in components such as Integrated Circuit (IC) packages, sensor housings, relays, and hermetic connectors. To achieve the stability and sealing performance required in semiconductor devices, 4J29 Iron-Nickel Alloy must undergo precise vacuum heat treatment. This step refines the grain structure, relieves internal stresses, and stabilizes the alloy’s microstructure to prevent unwanted phase transformations, ensuring consistent mechanical and thermal properties critical for long-term performance.

2. Controlled Heat Treatment for Precision and Stability

Through precise vacuum heat treatment in Normantherm’s high-vacuum furnaces, 4J29 sheets are processed under ultra-clean, oxygen-free conditions, ensuring uniform stress relief and microstructural homogeneity. Controlled heating and cooling preserve the flatness and structural integrity of the sheets, making them ideal for subsequent forming, brazing, or glass-to-metal sealing operations. The resulting heat-treated iron-nickel alloy sheet delivers excellent dimensional stability, surface brightness, and phase consistency qualities essential for high-precision semiconductor components where reliability and accuracy are paramount.

3. Normantherm- Reliable Heat Treatment for Advanced Alloys

As a leading manufacturer of vacuum furnace systems, Normantherm provides precision-engineered solutions for the heat treatment of iron-nickel alloys in the semiconductor industry. Each furnace ensures uniform heating, accurate process control, and contamination-free processing, producing repeatable results across every batch. This guarantees that 4J29 sheets maintain optimal sealing compatibility, structural integrity, and consistent performance. With over 15 years of expertise, Normantherm supports global customers with reliable, efficient, and high-precision vacuum furnace technology for next-generation semiconductor components.

Editor: Sahera Khatun

Copyright: Normantherm Vacuum Furnace