We are a trusted partner for the innovation of advanced materials using high throughput experimentation. Advanced materials are critical to sustaining and advancing many industries, including semiconductor and semiconductor related industries. Using traditional experimental techniques, it can take many years to discover new advanced materials and many more years to deploy them in the marketplace. By leveraging our proprietary High Productivity Combinatorial (HPC) equipment platform, advanced characterization ability and multi-disciplinary development team, we strive to enable our customers to more rapidly discover advanced materials and tailor them to suit their needs.
Our HPC platform, which consists of our Tempus™ processing tools, our unique, automated characterization methods, and our Informatics analysis software, is purpose-built for research and development (R&D) using combinatorial process systems in concert with established chemical vapor deposition (CVD), physical vapor deposition (PVD) and atomic layer deposition (ALD) deposition methods. Combinatorial processing is a methodology for experimentation, discovery and development that employs parallel and other high-throughput experimentation, which allows for R&D experimentation at speeds up to 100 times faster than conventional R&D platforms that are optimized for manufacturing rather than for R&D. Our development team included approximately 54 scientists and engineers (of whom approximately 56% have advanced degrees) or approximately 34% of our total headcount as of December 31, 2018.
We currently target large markets that rely on advanced materials for differentiation. Within these broad markets, we target customers that have track records of technological innovation, have significant materials-based R&D, and are pursuing technical advancements that are critical to their success and strategy. Samsung and SK hynix accounted for 10% or more of our revenue for the year ended December 31, 2018. Samsung and Micron Technology, Inc. ("Micron") each accounted for more than 10% of our revenue for the year ended December 31, 2017, and Guardian, Micron, Samsung and SK hynix each accounted for more than 10% of our revenue for the year ended December 31, 2016. To date, we have received the substantial majority of our revenue from customers in the semiconductor, glass, advanced alloys, light-emitting diodes (LEDs) and flat-panel display markets.