A non-volatile semiconductor memory device according to the present invention includes: a matrix of word lines and bit lines intersecting one another; and a memory cell of a stack gate type being disposed so as to correspond to each intersection of the matrix of the bit lines and the word lines, the...http://www.google.es/patents/US6067251?utm_source=gb-gplus-sharePatente US6067251 - Non-volatile semiconductor memory device
