Patent ID: 7407854

Claim:
A method for forming a storage node of a capacitor in a semiconductor device, the method comprising: forming a first amorphous silicon layer doped with a first doping concentration, the first doping concentration being of a dose to suppress dopants from locally agglomerating; forming a second amorphous silicon layer that is substantially undoped on the first amorphous silicon layer in an in-situ condition; patterning the first amorphous silicon layer and the second amorphous silicon layer to form a first storage node; converting the second amorphous silicon layer to form a plurality of silicon grains on an inner wall of the first amorphous silicon layer, wherein substantially all of the second amorphous silicon layer is converted to the silicon grains; and doping the first storage node and the silicon grains with dopants until a second doping concentration is reached, the second doping concentration being of sufficient dosage to provide requisite conductivity to the first storage node, wherein a dielectric layer is formed over the doped first storage node and a second storage node is formed over the dielectric layer.