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Press ReleaseSource: Legend Design Technology, Inc.

Legend Releases Memory Characterization Tool for Yield Improvements
Monday June 6, 2:52 pm ET
With Rising Mask Cost and Increasing Design Complexity, the 'Low-Yield' Risks Are Becoming Very Critical for Nanometer Technology

SANTA CLARA, Calif.--(BUSINESS WIRE)--June 6, 2005-- Legend Design Technology, Inc., a provider of circuit simulation and semiconductor IP characterization software, today announced that its industry-leading CharFlo-Memory! product, an automatic memory characterization tool, has been upgraded with new capabilities for improving silicon yields. The new release addresses the modeling optimization and reliability checks against signal integrity and noise-margin for embedded memories on system-on-chip (SoC) designs.

Legend's memory characterization tool has been adopted by major foundries, IDMs and fabless design companies such as TSMC, UMC, Broadcom, Marvell and most leading Japanese semiconductor companies etc.. The timing and power models generated have been successfully proven in numerous SoC designs, including 65nm and 90nm technology.

With rising mask cost and increasing design complexity, the 'low-yield' risks are becoming very critical for nanometer technology. As a result, the market windows for the associated products could be totally missed. The newly released CharFlo-Memory! can prevent reliability problems and enhance design quality for improving silicon yields of memory IP, which occupy the majority of silicon areas. Yield improvements in new release have been achieved by

    1. Using the exact 'instance' characterization for various PVTs
       (Process, Voltage and Temperature) rather than just roughly
       interpolated or extrapolated from table models. The instance
       characterization has become critically required for 90nm and
       65nm memory IP modeling.

    2. Performing reliability check at circuit-level after recognizing
       the structures and patterns of memory designs. In memory
       characterization process, the model parameters have been
       optimized with the following constraints

        --  The signals need be stronger than the noise-margin.
        --  The signals need be 'glitch' free.
        --  The signals need be 'meta-stability' free.
        --  The signals need be 'signal-integrity violation' free.

    3. Enabling the 'layout parasitic RC extraction' by providing only
       critical nets to be extracted. Since the 'critical nets' are
       less than 1% of the total nets on chip, the time-consuming
       'layout parasitic RC extraction' can be done in a much shorter
       time. Furthermore, the circuit netlist extracted becomes much
       smaller, too.

    CharFlo-Memory! tool applications include

    1. Commercial memory-compiler users
       At various PVTs (Process, Voltage and Temperature),
       CharFlo-Memory! can be used to automatically re-characterize
       the memory instances and generate the timing and power models
       in '.lib' format at silicon-level accuracy. This 'push-button'
       flow supports all leading commercial memory compilers from
       0.25um to 90nm technology.

    2. In-house memory-compiler or custom-memory development
       CharFlo-Memory! can be used for both detailed design
       verification and yield-oriented characterization. Either the
       accurate instance model or table-lookup compiler model can be
       automatically generated. Even for nanometer memory designs,
       the modeling accuracy and silicon yields have been fully
       verified in production at major foundries.

CharFlo-Memory! tool with new capabilities for improving silicon yields is available now from Legend Design Technology, Inc.

About Legend

Legend Design Technology Inc. is a leading provider of circuit simulation and semiconductor IP characterization software for SoC designs. With an emphasis on productivity and value, Legend's CharFlo-Memory! toolset revolutionizes the time-consuming and error-prone processes associated with characterization. MSIM is Legend's high-accuracy SPICE circuit simulator with great convergence and extensive model support. Turbo-MSIM is Legend's high-speed and high-capacity circuit simulator ideal for timing and power simulation, and function verification. Both simulators are well designed for nanometer technology challenges, and provide excellent price performance. For more information, visit www.LegendDesign.com.

CharFlo-Memory! and Turbo-MSIM are trademarks, and MSIM a registered trademark of Legend Design Technology, Inc.


Contact:
     Legend Design Technology Inc.
     Jane Wei, 408-748-8888 X234
     JaneW@LegendDesign.com



Source: Legend Design Technology, Inc.


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