A method of using a non-volatile memory that utilizes a charge-trapping layer for data storage is described. A refresh step is performed, after the non-volatile memory is subject to multiple write/erase cycles causing hard-to-erase electrons in the charge-trapping layer, to eliminate the hard-to-erase...http://www.google.de/patents/US7218554?utm_source=gb-gplus-sharePatent US7218554 - Method of refreshing charge-trapping non-volatile memory using band-to-band tunneling hot hole (BTBTHH) injection