• Simulation Standard Technical Journal

Simulation Standard Technical Journal

A Journal for Process and Device Engineers

Hints, Tips and Solutions for Expert Layout Editor

If I try to close a project, Expert gives me a prompt: "Save changes in a project?", but I remember that I didn't do any editing of cells. When can be the reason. The second question is: how do I know which cells were modified?

Simulating Impurity Freeze-Out During Low Temperature Operation

The low temperature operation of many device structures has been shown as an effective method for improving device performance without reducing device size. By modeling low temperature phenomena, numerical simulation of device operation at low temperatures provides an effective means for analyzing such performance improvements before investing manufacturing time or money. It is the purpose of this paper to discuss the modeling of the dopant freeze-out phenomenon in ATLAS and provide an application example of its use.

Simulation of Vertical Double-Gate SOI MOSFETs Using Device3D

This article will present the simulation methodology of a self-aligned double-gate MOSFET structure (FinFET) using SILVACO 3-D simulation suite. The double-gate MOSFET is one of the most attractive alternative to classical MOSFET structure for gate length down to 20nm. The main advantage of the FinFET is the ability to drastically reduce the short channel effect. In spite of his double-gate structure, the FinFET is closed to its root, the conventional MOSFET in layout and fabrication. 3-D numerical simulations of the FinFET are performed in this article, in order to validate the basic principles and to uncover several important aspects: evaluation of the length , width and quantum effects.

Non-Stationary Transport Effects: Impact on Performances of Realistic 50nm MOSFET Technology

We analyze quantitatively the real impact of technology on the needed level for carrier transport modeling. The results, based on theoretical analyzes, are applied to existing devices. This work shows which recipes must be used to evaluate the performances of advanced device architectures (down to 50nm gate length). An original point of this work is the investigation of technology influence (channel doping and LDD doping) on injection velocity at source side and on drain current. The results open the perspective of specific engineering of access regions in order to take full advantage of non-stationary effects on the drain current.

ATLAS can be used to perform large signal sinusoidal analysis

The Atlas syntax is flexible enough to allow the definition of sinusoidal nodal voltages by defining them on the SOLVE statement line. To illustrate this the structure shown in Figure 1 has been used. Before the sinusoidal pulse is applied a dc operating condition is set with

RF CMOS Modeling Using UTMOST III AC (S-Parameter) Module

This article presents a high frequency SPICE model parameter extraction method for CMOS devices. Current compact MOS models are developed for low frequency applications and provide good fits for DC, conductances and intrinsic capacitances. However for the gigahertz frequency range external components have to be modeled and added to the compact model as macro model elements. The macro model presented in this article provides good results up to 10 GHz.