Nowadays many electronic components, for example devices used in satellites or aircrafts, have to withstand challenging environments like vacuum or extremely high temperatures. To manufacture such reliable electronic components, a connection between dissimilar materials is required. This connection can be metal-to-metal or even insulator-to-metal, which is the more challenging task. It has to be strong, high temperature resistant and suitable for use in vacuum, as outgassing of flux material is not acceptable. If exposed to vacuum or a high temperature environment, the effects of the flux on the electronic component are harmful. The flux material, which contains acid and salts, changes into the gaseous phase due to its high vapor pressure. The resulting condensation of the flux material on the insulators may produce conductive paths causing a leakage current. This process will destroy the expensive component.
The solution to this problem is high vacuum soldering and brazing with Carbolite Gero’s HBO, a metallic hood furnace based on tungsten or molybdenum. The usable volume is 10, 25 or 60 l. Depending on the materials and the solder involved, the temperature is adjustable up to approximately 1300 °C with superior temperature homogeneity and stability. The automated up and down movement of the furnace hood facilitates loading and unloading, makes the sample easily accessible and decouples the vibrations which might harm the sample. A turbomolecular pumping unit is attached to the furnace as a standard. On demand, a ultra high vacuum (UHV, <10-7 mbar) option is available.