Patent ID: 6358857
Filing Date: 2002-03-19
Classification: H01L

Abstract:
A method of etching one or more insulative materials which comprise complexes of metal and oxygen, comprising:exposing the insulative materials comprising complexes of metal and oxygen to etching conditions which consist essentially of physical etching conditions within a reaction chamber; and while exposing the insulative materials to the physical etching conditions, flowing at least one oxygen-containing gas through the reaction chamber; and wherein the insulative materials comprise one or more of Ba(1âˆ’x)SrxO3, PbZr(1âˆ’x)TixO3, PZT, Sr(1âˆ’x)BixTiO3, PbMg(1âˆ’x), NbxTiO3, PbTiO3, CaBi2Nb2O9, SrBi2Nb2O9, BaBi2Nb2O9, PbBi2Nb2O9, BiBi2NbTiO9, BaBi4Ti4O15, CaBi2Ta2O9, BaBi2Ta2O9, PbBi2Ta2O9, Bi4Ti3O12, SrBi4Ti4O15, BaBi4Ti4O15, PbBi4Ti4O15, (Pb, Sr)Bi2Nb2O9, (Pb, Ba)Bi2Nb2O9, (Ba, Ca)Bi2Nb2O9, (Ba, Sr)Bi2Nb2O9, BaBi2Nb2O9, Ba0.75Bi2.25Ti0.25Nb1.75O9, Ba0.5Bi2.5Ti0.5Nb1.5O9, Ba0.25Bi2.75Ti0.75Nb1.25O9, Bi3TiNbO9, SrBi2Nb2O9, Sr0.8Bi2.2Ti0.2Nb1.8O9, Sr0.6Bi2.4Ti0.4Nb1.6O9, Bi3TiNbO9, PbBi2Nb2O9, Pb0.75, Bi2.25Ti0.25Nb1.75O9, Pb0.5Bi2.5Ti0.5Nb1.5O9, Pb0.25Bi2.75Ti0.75Nb1.25O9, Bi3TiNbO9, PbBi4Ti4O15, Pb0.75Bi4.25Ti3.75Ga0.25O15, Pb0.5Bi4.5Ti3.5Ga0.5O1.5, and Bi5Ti3GaO15.