Embodiments of the invention provide a transistor with stepped source and drain regions. The display subsystem displays a focus buoy associated with each window at the same time the window is displayed, stores the coordinates of the location at which the focus buoy is displayed in a table in the memory, and in response to simply shaking the mouse, displays the focus buoys at each location defined in the table. The semiconductor devices provide good lattice matching characteristics between the substrate and the material that is deposited upon the substrate.