BRIEF DESCRIPTION OF DRAWINGS
The invention will be further described by way of example with reference to the accompanying drawings in which:
FIG. 1 is a schematic representation of a device according to the invention in its open position;
FIG. 2 is a diagram illustrating the application of voltage pulses to a device according to the invention, with an indication of the corresponding position of the device;
FIG. 3 is a schematic diagram illustrating the structure of a device according to the invention produced by integrated silicon technology;
FIGS. 4
a to 4e schematically illustrate steps of a process for the manufacture of a device like that of FIG. 3;
FIG. 4
f is a top plan view of the finished device; and
FIG. 5 is a schematic representation of a device according to the invention which has an arrangement to maintain the semiconductor surfaces in depletion mode whatever be the applied voltage.