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IBM Journal of Research and Development  
Volume 51, Number 1/2, Page 5 (2007)
IBM System z9
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Optimization of silicon technology for the IBM System z9

by D. J. Poindexter, S. R. Stiffler, P. T. Wu, P. D. Agnello, T. Ivers, S. Narasimha, T. B. Faure, J. H. Rankin, D. A. Grosch, M. D. Knox, D. C. Edelstein, M. Khare, G. B. Bronner, H.-J. Nam, S. A. Butt
IBM 90-nm silicon-on-insulator (SOI) technology was used for the key chips in the System z9™ processor chipset. Along with system design, optimization of some critical features of this technology enabled the z9™ to achieve double the system performance of the previous generation. These technology improvements included logic and SRAM FET optimization, mask fabrication, lithography and wafer processing, and interconnect technology. Reliability improvements such as SRAM optimization and burn-in reliability screen are also described.
Related Subjects: Computer architecture; Computers; IBM System z9; Interconnection technology; Multichip modules (MCMs); Reliability