The current set of tools used for characterization of the interconnect system in an IC is fast becoming obsolete. Such tools use systems based on the Quasi-TEM mode to approximate the propagation velocity and extract RC or RLC circuit elements assuming silicon substrate as a ground reference conductor. At very high speeds this approximation is no longer accurate. The Slow Wave Mode, Skin Effect Mode and Quasi-TEM Modes all need to be accounted for. These depend on the silicon substrate resistivity and frequency and need to be taken into account in order to get an accurate scenario even for nonlinear circuit simulation. ApsimFDTD-SPICE accurately accounts for all three modes using full wave electromagnetic analysis and nonlinear circuit analysis in the time domain. In order to efficiently take care of both electromagnetic and nonlinear effects specialized for IC structures, newly developed special techniques such as irregular meshing, auto-initial conditions and auto-spatial boundary conditions have been implemented. Since ApsimFDTD-SPICE uses general 3D full wave electromagnetic field solver, lossy conductor, dielectric, and magnetic materials can be modeled. This allows users to evaluate the effect of thin magnetic adhesion layer for copper traces in ICs. Once integrated with the process transistors it allows design and process engineers to accurately characterize new layouts and technology without many months of empirical analysis.
The program reads in technology and layout information compiles the files such as GDSII and runs a SPICE like net-list. There are a variety of output functions available that include real time animation of the 3D spatial voltage, current, electric and magnetic fields in time domain as well as S, Y, and Z parameters in the frequency domain. It also can be interfaced with the Electromagnetic Interference simulator ApsimRADIA. The traditional time domain plotting supported by SPICE is also done. The application of ApsimFDTD-SPICE is intended for the analysis and electrical characterization of high performance IC cells with transistor and/or behavioral models for both digital and analog designs. Although ApsimFDTD-SPICE uses its own ApsimSPICE which has more than Berkeley SPICE models, it can accurately convert any SPICE format using ApsimTSG (Table_SPICE Generator) made from the original native SPICE. It allows engineers to characterize new layout and technology changes that may impact a design’s electrical performance. It can account for accurate delay, cross talk, signal degradation, power/ground bounce and simultaneous switching output noise (SSO) due to the electromagnetic interactions of the interconnect system with the IC design technology. ApsimFDTD-SPICE can also be used for IC package and printed circuit design with a layout system interface. It can be applied to all levels of design from IC, IC package to PCB as a unified tool. ApsimFDTD-SPICE is most accurate hybrid simulator for 3D-fullwave electromagnetic and nonlinear circuit simulation. It accounts for more than traditional inductance effect and silicon substrate resistive effect.
USA price starts from $49,800. The product is available on both UNIX and Windows operating systems.
For more information contact:
Fred Balistreri Applied Simulation Technology 2025 Gateway Place, Suite 318 San Jose, CA 95110 408-436-9070 ext. 102 email: firstname.lastname@example.org web: www.apsimtech.com