This tutorial is just a idea about how to do this kind of subject in Wings3d. It's far to be precise and realistic, but it's a start point.
It was made because someone asked for how to do a small part of an integrated circuit and I ended up by making it from the start.
Three different approach to the body:
The first one is the same used in the video; The second after a cleanup and the third is a version for use with normalmap to build the dimple.
The use of hard edges in the second version was intended to equilibrate the weight of the mesh during the smooth operation. It made the smoothed object consistent with all corners with the same "curvature".
Bellow, the wire, smooth preview and render (POV-Ray). The image was applied by using the Snap Image tool.