SigmaTech Inc., a Delaware Corporation, was formed with the charter to develop, produce and market a new line of non-contact wafer thickness and flatness measurement stations for the semiconductor industry using backpressure sensing technology. Thus was born the 9600 series of measurement systems. All 9600 measurement systems utilize SigmaTech's patented auto-positioning backpressure probe (APBP) technology. APBP technology is capable of sub-micron accuracy while providing numerous advantages over existing technologies ... more specifically for applications related to non-silicon wafers, high-resistivity material, composites, silicon on insulator (SOI), brittle and/or unpolished materials.