A nonvolatile semiconductor memory device is formed in which data in the form of electrons trapped in the silicon layers directly on the source and the drain respectively can hardly be lost or replaced with other data. The semiconductor device has a memory transistor includes a drain and a source, an...http://www.google.fr/patents/US6806532?utm_source=gb-gplus-shareBrevet US6806532 - Nonvolatile semiconductor device
