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- research-articleJune 2012
Clock tree synthesis with methodology of re-use in 3D IC
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 1094–1099https://doi.org/10.1145/2228360.2228559IP reuse methodology has been used extensively in SoC (System on Chip) design. In this reuse methodology, while design and implementation cost is saved, manufacturing cost is not. To further reduce the cost, this reuse concept has been proposed at mask ...
- research-articleJune 2012
Obstacle-avoiding free-assignment routing for flip-chip designs
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 1088–1093https://doi.org/10.1145/2228360.2228558The flip-chip packaging is introduced for modern IC designs with higher integration density and larger I/O counts. It is necessary to consider routing obstacles for modern flip-chip designs, where the obstacles could be regions blocked for signal ...
- research-articleJune 2012
A chip-package-board co-design methodology
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 1082–1087https://doi.org/10.1145/2228360.2228557In today's IC production, the design processes of chips, packages, and boards are typically separate from each other. The lack of information from other domains causes significant design convergence problems and greatly reduces design quality. In this ...
- research-articleJune 2012
The DAC 2012 routability-driven placement contest and benchmark suite
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 774–782https://doi.org/10.1145/2228360.2228500Existing routability-driven placers mostly employ rudimentary and often crude congestion models that fail to account for the complexities in modern designs, e.g., the impact of non-uniform wiring stacks, layer directives, partial and/or complete routing ...
- research-articleJune 2012
GLARE: global and local wiring aware routability evaluation
- Yaoguang Wei,
- Cliff Sze,
- Natarajan Viswanathan,
- Zhuo Li,
- Charles J. Alpert,
- Lakshmi Reddy,
- Andrew D. Huber,
- Gustavo E. Tellez,
- Douglas Keller,
- Sachin S. Sapatnekar
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 768–773https://doi.org/10.1145/2228360.2228499Industry routers are very complex and time consuming, and are becoming more so with the explosion in design rules and design for manufacturability requirements that multiply with each technology node. Global routing is just the first phase of a router ...
- research-articleJune 2012
Structure-aware placement for datapath-intensive circuit designs
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 762–767https://doi.org/10.1145/2228360.2228498Datapath is one of the most important components in high performance circuit designs, such as microprocessors, as it is used to manipulate all data. For better performance, a datapath is usually placed with high regularity and compactness. Although cell ...
- research-articleJune 2012
PADE: a high-performance <u>p</u>lacer with <u>a</u>utomatic <u>d</u>atapath <u>e</u>xtraction and evaluation through high dimensional data learning
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 756–761https://doi.org/10.1145/2228360.2228497This work presents PADE, a new placer with automatic datapath extraction and evaluation. PADE applies novel data learning techniques to train, predict, and evaluate potential datapaths using high-dimensional data such as netlist symmetrical structures, ...
- research-articleJune 2012
Exploiting die-to-die thermal coupling in 3D IC placement
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 741–746https://doi.org/10.1145/2228360.2228495In this paper, we propose two methods used in 3D IC placement that effectively exploit the die-to-die thermal coupling in the stack. First, TSVs are spread on each die to reduce the local power density and vertically aligned across dies simultaneously ...
- research-articleJune 2012
Standard cell routing via boolean satisfiability
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 603–612https://doi.org/10.1145/2228360.2228470We propose a flow for routing nets within a standard cell that 1) generates candidate routes for point-to-point segments; 2) finds conflicts (electrical shorts and geometric design rule violations) between candidate routes; and 3) solves a SAT instance ...
- research-articleJune 2012
Non-uniform multilevel analog routing with matching constraints
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 549–554https://doi.org/10.1145/2228360.2228458Symmetry, topology-matching, and length-matching constraints are three major routing considerations to improve the performance of an analog circuit. Symmetry constraints are specified to route matched nets symmetrically with respect to some common axes. ...
- research-articleJune 2012
Guiding a physical design closure system to produce easier-to-route designs with more predictable timing
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 465–470https://doi.org/10.1145/2228360.2228442Physical synthesis has emerged as one of the most important tools in design closure, which starts with the logic synthesis step and generates a new optimized netlist and its layout for the final signoff process. As stated in [1], "it is a wrapper around ...
- research-articleJune 2012
Algorithms and data structures for fast and good VLSI routing
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 459–464https://doi.org/10.1145/2228360.2228441We present advanced data structures and algorithms for fast and high-quality global and detailed routing in modern technologies. Global routing is based on a combinatorial approximation scheme for min-max resource sharing. Detailed routing uses exact ...
- research-articleJune 2012
Can pin access limit the footprint scaling?
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 1100–1106https://doi.org/10.1145/2228360.2228560If pin density exceeds a certain threshold, pin access becomes a challenge for inter-cell signal routing and increasing the number of metal layers cannot improve routability. CMOS and FinFET layouts may never reach this threshold, but Vertical Slit ...
- research-articleJune 2012
Rule agnostic routing by using design fabrics
DAC '12: Proceedings of the 49th Annual Design Automation ConferencePages 471–475https://doi.org/10.1145/2228360.2228443Moore's law requires the shrinking of physical dimensions of the transistors to roughly half their area every two years. This poses a tremendous challenge on how to print and manufacture these ever-shrinking physical components that make up the ...