Patent ID: 8237211

Claim:
A non-volatile semiconductor storage device comprising: a memory string including a plurality of electrically rewritable memory cells connected in series; and a protruding layer formed to protrude upward with respect to a substrate, the memory string comprising: a plurality of first conductive layers laminated on the substrate and functioning as control electrodes of the memory cells; a first semiconductor layer formed to penetrate the plurality of first conductive layers and functioning as a body of each of the memory cells; and an electric charge storage layer formed between the first conductive layers and the first semiconductor layer, and configured to be able to store electric charges to retain data of the memory cells, each of the plurality of first conductive layers comprising: a bottom portion extending in parallel to the substrate; and a side portion extending upward with respect to the substrate along the protruding layer at the bottom portion, the protruding layer having a width in a first direction parallel to the substrate that is less than or equal to its length in a lamination direction.