Influence of Belt Furnace on Glass-to-Metal Seal Process
Glass, under suitable conditions, will bond well to a wide variety of metals and
alloys which has led to the development of many useful technologies. One of them is
Glass-to-metal seal (GTMS) technique. GTMS becomes a popular and low cost method
to hermetic sealing, which is an important part of design of many products today. The
GTMS is a fusion bonding technique; glass is heated to a molten state and bonds to the
metal. Bonding occurs through wetting and chemical reactions between the metal and
the glass. In addition to providing seal, the glass acts as an insulator between one pin to
another and housing.
GTMS has a lot of advantages, such as effective hermeticity; resistance in
harsh environments e.g. against corrosive material, vibrations, serious temperature
fluctuations; long-term, reliable protection of the packaged component. A large number
of products use GTMS technology for its excellent value. The applications include
Electronic and photonic package, aerospace, automotive, battery feed through, high
vacuum, medical, military and sensor housing. Soft glass is the appropriate bulb or
tube material for incandescent and fluorescent lamps.