Patent ID: 7651907

Claim:
A method for fabricating a semiconductor device, the method comprising: forming an etch stop layer and an insulation layer over a substrate having a first region and a second region; selectively removing the insulation layer and the etch stop layer in the first region to expose parts of the substrate, thereby forming at least two electrode regions on the exposed substrate and a resultant structure; forming a conductive layer over the resultant structure; removing the conductive layer in the second region; removing the insulation layer in the first region and the second region by using wet chemicals; and removing parts of the conductive layer, which formed between the at least two electrode regions in the first region, to form cylinder type electrodes in the first region, wherein forming the at least two electrode regions comprises: forming a hard mask over the insulation layer in the first region; forming a photoresist pattern over the hard mask; etching the hard mask by using the photoresist pattern as an etch mask; and successively etching the insulation layer and the etch stop layer by using the etched hard mask as an etch barrier.