In this paper, the processing conditions of the amorphous silicon film growth were investigated the effect in forming the HSG-Si on the surface of the storage electrode. As a result, when the amorphous silicon film phosphorus concentration is greater than 5.5 ± 0.1E19 atoms / ㎤, HSG-Si is not formed correctly and showed the concentration dependency of HSG formation. Also, the optimum condition of the phosphorus concentration for amorphous silicon and HSG thickness are 4.5E19 atoms/㎤ and 450Å, respectively, because of the HSG thickness over the 500Å create to bit failure according to a short of the electrodes and the electrode.