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Lombardi Surface Mobility

Application ID: 15579

Surface acoustic phonons and surface roughness have an important effect on the carrier mobility, especially in the thin inversion layer under the gate in MOSFETs. The Lombardi surface mobility model adds surface scattering resulting from these effects to an existing mobility model using Matthiessen’s rule.

This model demonstrates how to use the Lombardi surface mobility model for the electron mobility in a simple MOSFET. The current density profile and total current flowing into the terminal is compared with the constant mobility case.

This model is included as an example in the following products:

Semiconductor Module

The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.