Patent ID: 8334525

Claim:
A nonvolatile semiconductor memory device comprising electrically rewritable memory cells, each of the memory cells comprising a variable resistance layer with electrical resistivity changeable by at least one of an applied voltage and a conducting current, the variable resistance layer including a mixture of a first compound and a second compound, the first compound including carbon (C) as well as at least one element selected from a group of elements G 1 , the group of element G 1 consisting of hydrogen (H), boron (B), nitrogen (N), silicon (Si), and titanium (Ti); and the second compound including at least one compound selected from a group of compounds G 2 , the group of compounds G 2 consisting of silicon oxide (SiO 2 ), silicon oxynitride (SiON), silicon nitride (Si 3 N 4 ), carbon nitride (C 3 N 4 ), boron nitride (BN), aluminum nitride (AlN), aluminum oxide (Al 2 O 3 ), and silicon carbide (SiC), concentration of the first compound in the variable resistance layer being not less than 30 volume percent, and not more than 70 volume percent the at least one element selected from the group of elements G 1 being hydrogen (H), and concentration of the group of elements G 1 in the first compound being 10-65 atomic percent.