Patent ID: 8207029

Claim:
A method for manufacturing a semiconductor device, comprising: forming a stacked body of a dielectric layer including a silicon oxide and a conductive layer including silicon above a substrate; and forming a hole penetrating through the dielectric layer and the conductive layer in the stacked body, the forming the hole including: forming a first mask layer including a silicon oxide above the stacked body; etching the conductive layer while using the first mask layer as a mask; and forming a second mask layer having more silicon content than the dielectric layer above the first mask layer to etch the dielectric layer while using the second mask layer as a mask, wherein a plurality of the dielectric layers and a plurality of the conductive layers are alternately stacked to form the stacked body, etching each of the conductive layers while commonly using the first mask layer formed above the stacked body before etching the dielectric layers and the conductive layers and etching each of the dielectric layers after forming the second mask layer above the first mask layer are alternately repeated to form the hole in the stacked body and forming a dielectric film including a charge storage layer on side wall of the hole after forming the hole; and providing a semiconductor layer in the hole after forming the dielectric film.