A pixel unit 1 comprises a nonvolatile memory transistor MT, which is formed on a p-type well 12 of a semiconductor substrate 10 and which has a floating gate 14 and a control gate 16, and selecting gate transistors ST1 and ST2 which share a diffusion layer 17 with the memory transistor MT and which...http://www.google.de/patents/US6784933?utm_source=gb-gplus-sharePatent US6784933 - Solid-state imaging device and method for controlling same
