Methods of selectively forming metal silicides on a memory device are
provided. The methods can include forming a mask layer over the memory
device; forming a patterned resist over the mask layer; removing upper
portions of the patterned resist; forming a patterned mask layer by
removing portions of the mask layer that are not covered by the patterned
resist; and forming metal silicides on the memory device by a chemical
reaction of a metal layer formed on the memory device with portions of
the memory device that are not covered by the patterned mask layer. By
preventing silicidation of underlying silicon containing
layers/components of the memory device that are covered by the patterned
mask layer, the methods can selectively form the metal silicides on the
desired portions of the memory device.