An electronic device housing with a seemless user input zone that measures
the level of force applied by the user is described. It is particularly
advantageous when used with small hand-held consumer electronic devices
such as mobile phones, PDAs, game- and media players. A housing for an
electronic device includes a seamless user input zone defining a contact
force-sensitive deformable area. A capacitance sensor is formed between
the conductive inside surface of the housing and the electrode of the
rigid base facing that inside surface. Linear support means such as
columns support the housing away from the rigid base defining an air gap.
Capacitance measurement circuit is deployed to detect the location and
force applied by the user onto the housing and send a user input signal
to the electronic device.