Credence Systems Corporation is a manufacturer of test equipment for the global semiconductor industry. Founded in 1978, it aquired TMT in 2000 and merged with competitor LTX in 2008. It is headquartered in Milpitas, California, and is established in twenty countries. Customers include integrated device manufacturers (IDMs), wafer foundries, outsource assembly and test suppliers and fabless chip companies.
Credence has three main product lines: Sapphire – an IC test system intended primarily for production testing with multisite capabilities, i.e., the option to test multiple chips in one go. It can be scaled to varying requirements, with a top clock rate of more than 6.4 GHz.
Diamond – comprising two system targeted at both chip development testing and production testing.
ASL – a product series of three distinct models. The entry model has very low environment requirements; it is unusual among ATEs in that is needs neither water nor specialized power supply. The ASL models are targeted at RF applications such as video, or wireless telecommunication chips.