Patent ID: 8633109

Claim:
A method, comprising: providing a substrate; forming a transistor at least partially in the substrate, the transistor having a channel region; forming a contact hole over the substrate; and forming a conductive contact in the contact hole using a 11 B-enriched Boron material, wherein the forming the conductive contact includes: forming a Tungsten-containing seed layer in the contact hole through an atomic layer deposition (ALD) process, wherein the 11 B-enriched Boron material is used as a precursor in the ALD process; and performing a chemical vapor deposition (CVD) process after the ALD process, the CVD process forming a Tungsten material on the Tungsten-containing seed layer; and wherein the forming the conductive contact is carried out in a manner so that the conductive contact is spaced apart from the channel region by less than about 0.5 microns.