摘要:
Chemical vapor deposition is used to form a film of Bi oxide, Sr oxide, and Ta oxide on a heated substrate by decomposing the precursors of these oxides at the surface of the substrate. The precursor of Bi oxide is a Bi complex which includes at least one carboxylate group and is decomposed and deposited at a temperature lower than 450° C. The film of Bi, Sr, and Ta oxides obtained by low-temperature CVD is predominantly non-ferroelectric, but can be converted into a ferroelectric film by a subsequent heating process.
摘要:
Chemical vapor deposition is used to form a film of Bi oxide, Sr oxide, and Ta oxide on a heated substrate by decomposing the precursors of these oxides at the surface of the substrate. The precursor of Bi oxide is a Bi complex which includes at least one amide group and is decomposed and deposited at a temperature lower than 450° C. The film of Bi, Sr, and Ta oxides obtained by low-temperature CVD is predominantly non-ferroelectric, but can be converted into a ferroelectric film by a subsequent heating process.
摘要:
A scavenger layer is provided to prevent the diffusion of an excess mobile specie from a metal oxide ceramic into unwanted parts of a device. The scavenger layer is provided above the metal oxide ceramic. As the excess mobile specie diffuses out of the metal oxide ceramic, it migrates toward the scavenger layer and reacts with it. The reaction consumes the excess mobile specie.
摘要:
A solvent composition useful for liquid delivery MOCVD, comprising toluene and a Lewis base, wherein toluene is present at a concentration of from about 75% to about 98% by volume, based on the total volume of toluene and the Lewis base. Such solvent composition is usefully employed to dissolve or suspend precursors therein for liquid delivery MOCVD, e.g., MOCVD of ferroelectric material films such as SBT.
摘要:
A metal oxide ceramic layer is formed from an amorphous film. The metal oxide ceramic layer comprises, for example, a Bi-based oxide ceramic, The amorphous Bi-based metal oxide layer is annealed to transformed it into a ferroelectric layer. A lower thermal budget is needed to transform the amorphous Bi-based metal oxide ceramic into the ferroelectric phase.
摘要:
A low temperature CVD process for deposition of bismuth-containing ceramic thin films suitable for integration to fabricate ferroelectric memory devices. The bismuth-containing film can be formed using a tris(β-diketonate) bismuth precursor. Films of amorphous SBT can be formed by CVD and then ferroannealed to produce films with Aurivillius phase composition having superior ferroelectric properties suitable for manufacturing high density FRAMs.
摘要:
A low temperature CVD process using a tris (&bgr;-diketonate) bismuth precursor for deposition of bismuth ceramic thin films suitable for integration to fabricate ferroelectric memory devices. Films of amorphous SBT can be formed by CVD and then ferroannealed to produce films with Aurivillius phase composition having superior ferroelectric properties suitable for manufacturing high density FRAMs.
摘要:
Reduced diffusion of excess mobile specie from a metal oxide ceramic is achieved by tailoring the composition an/or deposition parameters. A barrier layer which reacts with the excess mobile specie is provided below the metal oxide ceramic to prevent or reduce the diffusion of the excess mobile specie through the bottom electrode and into the substrate.
摘要:
A solvent composition useful for liquid delivery MOCVD, comprising toluene and a Lewis base, wherein toluene is present at a concentration of from about 75% to about 98% by volume, based on the total volume of toluene and the Lewis base. Such solvent composition is usefully employed to dissolve or suspend precursors therein for liquid delivery MOCVD, e.g., MOCVD of ferroelectric material films such as SBT.
摘要:
A low temperature CVD process using a tris (&bgr;-diketonate) bismuth precursor for deposition of bismuth ceramic thin films suitable for integration to fabricate ferroelectric memory devices. Films of amorphous SBT can be formed by CVD and then ferroannealed to produce films with Aurivillius phase composition having superior ferroelectric properties suitable for manufacturing high density FRAMs.