  The development of stretchable and flexible electronics based on soft
polymeric substrates requires novel approaches in the design, fabrication,
integration, and packaging of passive and active electronic components. Here we
demonstrate the fabrication, based on the use of supersonic cluster beam
implantation and deposition, of a system consisting of a stretchable keyboard
made by PDMS connected with a touch sensor and a matrix of LEDs printed on
paper, through paper-based interconnections. The stretchable keyboard has
conductive vias to electrically connect the top and bottom layers. Gold
conductive films printed on paper are used to connect the keyboard with the
electronic components that drive the LED matrix.
