In vacuum technology, the non-removable joint is achieved by welding, brazing or welding or by metallization or sintering with subsequent brazing.

    In recent years, vacuum resistant adhesives have also been used to join components that are not involved in UHV technology applications. The connection technology chosen must be well designed for mechanical strength, temperature and changing heat load and the required air tightness requirements. In vacuum technology, material pairing is frequently used, such as metal to metal, glass to glass, glass to metal, metal to ceramic, and glass to ceramic. The most common connection methods for metals are welding and brazing. In glass equipment, individual glass components are joined by fusion bonding. Metal and glass connections by fusion or metallization and fusion or brazing are used in UHV-compatible, bakeable viewports. The most common connection method is metal and ceramic bonding by metallization or sintering, for example, for vacuum current leads.