Process for producing a piezoelectric film, film forming apparatus, and piezoelectric film

A piezoelectric film is formed on a substrate by a sputtering technique at a film formation temperature higher than a Curie temperature. An electric field is formed across the piezoelectric film in a direction heading from a surface side of the piezoelectric film toward the substrate side before a t...

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Bibliographische Detailangaben
Hauptverfasser:	TSUKAMOTO RYUJI, FUJII TAKAMICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CORRECTION OF TYPOGRAPHICAL ERRORS DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LINING MACHINES METALLURGY PERFORMING OPERATIONS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A piezoelectric film is formed on a substrate by a sputtering technique at a film formation temperature higher than a Curie temperature. An electric field is formed across the piezoelectric film in a direction heading from a surface side of the piezoelectric film toward the substrate side before a temperature of the piezoelectric film having been formed falls to a temperature lower than the Curie temperature, polarization processing being caused to begin by the formation of the electric field across the piezoelectric film. The temperature of the piezoelectric film is allowed to fall to a temperature lower than the Curie temperature in the state in which the electric field is being formed.