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The next generation tool for Dummy Filling
Overview
| GTstyle is the next generation of metal fill engine dedicated to the 65nm processes and below. It offers the power and efficiency of a model based approach with the simplicity of a rule based tool.
Its unique features can accommodate complex metal filling rules while keeping a strict compatibility with DRC checks.
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GTstyle usually generates between 50% and 85% less dummies than a pure rule based engine and by keeping dummies as far as possible from active geometries, it dramatically reduces parasitics and the impact on timing. |
Main features
 Densitiy and/or roughness analysis
Gradient constraint to avoid important variations
Optimized patented dummy fill algorithm working with the 3D analysis software
Optimized dummies instantiation method
Can keep dummies far away from active geometries
Allows stackable metal filling
Uniform distribution : optionaly keeps a uniform distribution of dummies
Instantiate any kind of dummies : any shape, stacked vias, diodes to ground, etc.
Able to interconnect dummies
Optimized resulting GDSII/OASIS database size at chip
Fully scriptable for integration in any design flow
Key benefits
GTstyle does not need a model to run
GTstyle provides density variation analysis
Minimum parasitic effects is effective by limiting the number of inserted tiles
GTstyle is compatible with DRM
It keeps compatibility with DRC check
Adjust the target density to achieve better CMP (Chemo Mechanical
Planarization) yield
Enables to take dummy effects into account early in the design process due
to fast computation
Patented filling algorithm
At the heart of GTstyle is a patented filling algorithm, which calculates the minimum of tiles to be inserted in zones while keeping given density, roughness and gradient limits. As opposed to other metal-fill tools, GTstyle is highly flexible and can be used for any process.
GTstyle performance
GTstyle has been optimized in terms of speed, memory and disk usage. This allows designers to perform the metal-fill early in their design process, and take into account the possible induced parasitic effects.
GTstyle is able to manage the largest databases, since it directly operates on zipped or compressed files. Special optimizations in the filling algorithm have been developed in order to minimize the size of the generated GDSII/OASIS databases.
GTstyle is 10x faster than a classical DRC tool.
Supported platforms
SUN Sparc Stations, 32 and 64 bits, Solaris 2.5 and +
HP HPUX 11.x
x86 PC Linux RedHat 3 and +
x86-64 PC Linux RedHat 3 and +
ItaniumII Linux RedHat 3 and +
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