Patent ID: 7936018

Claim:
A semiconductor device comprising: an active zone of semiconductor material doped according to a first type of doping; a drain zone formed in said active zone and doped according to a second type of doping; a source zone formed in said active zone and doped according to said second type of doping; an insulated gate zone separated from said active zone by an insulating layer; a deep well, doped according to said second type of doping such that said active zone is located between said gate zone and said well; a floating gate zone formed in said active zone under a space existing between said drain zone and said source zone, said floating gate zone comprising defects introducing deep levels in the bandgap of said semiconductor material, said deep levels being suited to trap carriers corresponding to said first type of doping such that a charge state of said floating gate zone is modified and a drain source current varies due to the presence of a supplementary potential on said floating gate zone, a concentration of defects in said floating gate zone being strictly greater than 10 18 cm −3 .