Cold conductor contact metallisation - invovles use of titanium as protective layer or as layer for stop layer construction

摘要

The employment of titanium as a stop layer construction for contact metallisation involves the application of a nickel layer as solderable diffusion stop. On the nickel layer is applied a protective layer of silver. Where a double layer metallisation is requierd, between the cold conductor and the titanium protective layer is applied an aluminium layer for stop layer construction. The titanium layer has a thickness of a few tenths of a micrometre. USE/ADVANTAGE - Titanium used as a protective layer for cold conductor contact metallisation.