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Davari was one of the leaders in the Cell Broadband Engine work at IBM, which was used to build the first Cell-based supercomputer, IBM Roadrunner. In 2008, the Roadrunner supercomputer was the first to break the petaflop barrier, reaching a processing speed of 1.026 petaflops.

Bijan Davari is an Iranian-American engineer. He is an IBM Fellow and Vice President at IBM Thomas J Watson Research Center, Yorktown Hts, NY. His pioneering work in the miniaturization of semiconductor devices changed the world of computing. His research led to the first generation of voltage-scaled deep-submicron CMOS with sufficient performance to totally replace bipolar technology in IBM mainframes and enable new high-performance UNIX servers. He is credited with leading IBM into the use of copper and silicon on insulator before its rivals. He is a member of the U.S. National Academy of Engineers and is known for his seminal contributions to the field of CMOS technology. He is an IEEE Fellow, recipient of the J J Ebers Award in 2005 and IEEE Andrew S. Grove Award in 2010. At the present time, he leads the Next Generation Systems Area of research.

In 1987, Davari led an IBM research team that demonstrated the first MOSFET with 10 nanometer gate oxide thickness, using tungsten-gate technology. In 1988, he led an IBM team that demonstrated high-performance dual-gate CMOS devices with 180 nm to 250  nm channel lengths.

At IBM, Davari worked on ways to improve MOSFET (metal-oxide-semiconductor field-effect transistor) and CMOS (complementary metal-oxide-semiconductor) technology, which provides the basis for much of today's semiconductor processing. In 1985, Davari began the task of defining IBM's next generation of CMOS integrated circuits, which came to be called CMOS-5X. He led the research efforts that produced the first generation of high-performance, low voltage deep submicron CMOS technology. CMOS-5X served as the basis for the PowerPC® 601+ and several other microprocessors, including those used in IBM System/390 servers.

Bijan Davari was born in Tehran, Iran, in 1954. He received his bachelor's degree in electrical engineering from Sharif University of Technology, Tehran, Iran, and his master's degree from Rensselaer Polytechnic Institute (RPI). He received his doctorate from RPI as well with a thesis on the interface behavior of semiconductor devices, and joined IBM Thomas J Watson Research Center in 1984.