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Copper Deposition in a Trench

Application ID: 2112

This model demonstrates the use of moving meshes in the application of copper electrodeposition on circuit boards. In these environments, the presence of cavities or 'trenches' are apparent.

The model makes use of the Tertiary, Nernst-Planck interface for electrodeposition to keep track of the deformation of the mesh. Furthermore, electrochemical reaction kinetics through use of the Butler-Volmer equation for copper deposition are freely entered at the boundaries.

The model is inherently time-dependent and results clearly show that the mouth of the trench narrows, due to non-uniform deposition of the copper. In addition, the simulation shows a substantial variation in copper ion concentration along the length of the trench. Such effects can be detrimental to the quality of the deposition, create corrosion possibilities, and lead to material waste.

This application was built using the following:

Electrodeposition Module

The combination of COMSOL® products required to model your application depends on the physics interfaces that define it. Particular physics interfaces may be common to several products (see the Specification Chart for more details). To determine the right combination of products for your project, you should evaluate all of your needs in light of each product's capabilities, consultation with the COMSOL Sales and Support teams, and the use of an evaluation license.