A mechanism to enable multiple message threads management in the context of the Converged IP Messaging service and in the context of CPM inter-working with SMS is provided. The compression mechanism is disposed within the shell and the motor is drivingly engaged with the compression mechanism. In another form of the invention, the platen cover is divided into at least two portions, of which one portion is always held parallel to the platen glass. An etch stop layer employed when forming a trench within the dual damascene aperture also passivates a capacitor sidewall.