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New Product: Takumi‚??s ‚??Enhance-RO‚?? now optimized for automated enforcement of recommended rule

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TakumiProduct Briefing Outline: Takumi Technology Corporation today announced the availability of its new layout optimization tool - the Takumi Enhance-RO - for automated enforcement of recommended rules and critical area optimization. With Takumi Enhance-RO, Takumi's layout optimization suite now offers complete solutions to address issues that affect parametric yield as well as eliminating catastrophic defects.

Problem: Recommended design rules, sometimes referred to as DFM rules or preferred rules, are increasingly used by foundries to manage yield ramp for advanced process nodes. Each of these recommended rules are designed to address specific yield loss conditions encountered during process ramp-up. The number of these rules also increases rapidly with each new process node. Manual enforcement is extremely difficult as often these rules contradict or fight with each other. The relative priority of each rule is design-dependent. For example, in the case of data-path, control logic, and embedded memory macros, it is very likely that a single rule may take on different priorities. With a fixed cell area and tight performance constraints, enforcing recommended rules on any layout is a challenge. With space constraints, enforcement of recommended rules by objectively trading-off the relative impact on silicon quality is practically impossible. This process is no longer a geometric manipulation of layout dimensions. It is an optimization process involving quantitative trade-off analyses where automation is the only viable option.

Solution: Takumi Enhance-RO is designed to give the user greater productivity gains by fully automating the recommended rule enforcement process and benefiting from the foundry's learning curve in yield enhancement. The software analyzes a layout to detect locations where the recommended rules are not being enforced. Using a built-in cost-based trade-off analysis, the recommended rules to be applied are determined. The enforcement is automatically accomplished taking constraints such as space, cell size, etc., into consideration, thereby enhancing quality. For example, by enforcing the recommended spacing for poly gate to diffusion, it can address parametric effects of gate variation. In the simplest form, Takumi Enhance-RO may specify the cost of each recommended rule as a basic numerical value. Using actual foundry data, the system may also assign a relative probability value to every recommended rule and each failure type, such as cover margin, gate variations, etc.

Applications: CAA and enforcement of recommended and restricted rules (for metal1 and below).

Platform: A graphical user interface allows a designer to interactively alter recommended values as well as user-defined priorities for predefined recommended rules. Once defined, with a single mouse click, a user may enforce recommended rules on a single layout or a group of layouts. This GUI supports quick what-if analysis.

Availability: June 2008 onwards.

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