Patent ID: 7273822

Claim:
A method for forming a thin film for a semiconductor device, the method including steps of: supplying a first reactant to a chamber to chemically adsorb the first reactant onto a substrate, the first reactant being bubbled by a first gas that is preheated to form a first reaction gas that then is supplied to the chamber; purging the chamber to remove residues on the substrate having the first reactant chemically adsorbed; and forming the thin film by means of chemical displacement by supplying a second reactant to the chamber to chemically adsorb the second reactant onto the substrate, wherein the thin film comprises one of a single atomic thin film formed of Ti, Ta, Ru, Ir, Rh, Mo, Al, Cu, Pt, W or Ag, a single atomic oxide formed of HfO 2 , Ta 2 O 5 , ZrO 2 , Nb 2 O 5 , CeO 2 , In 2 O 3 , RuO 2 , IrO 2 , or Al 2 O 3 , a complex oxide formed of SrTiO 3 , PbTiO 3 , SrRuO 3 , CaRuO 3 , (Ba,Sr)TiO 3 , Pb(Zr,Ti)O 3 , (Pb,La)(Zr,Ti)O 3 , (Sr,Ca)RuO 3 , In 2 O 3 , doped with Sn, In 2 O 3 doped with Fe, or In 2 O 3 doped with Zr, a single atomic nitride film formed of TiN, TaN, NbN, ZrN, Ya 3 N 5 , SiN, AlN, GaN, WN or BN, or a complex nitride film formed of TiSiN, TaSiN, AlTiN, WBN, WSiN or AlSiN.