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US 10,060,044 B2Granted
Polarizing apparatus and polarizing method
AssigneeRicoh Company, Ltd.
InventorXianfeng Chen
Life of this patent
Estimating the term…
Abstract
A polarizing apparatus includes an electromagnetic wave irradiator to irradiate a target film with an electromagnetic wave to heat the target film; and an electric charge generator to apply an electric field to the target film.
Claims8
A polarizing method comprising:
- forming a piezoelectric film by a chemical solution deposition method;
- irradiating the piezoelectric film with an electromagnetic wave to heat a predetermined region of the piezoelectric film to a temperature equal to or higher than a Curie temperature of the piezoelectric film;
- starting to apply an electric field to the predetermined region while the temperature of the predetermined region is equal to or higher than the Curie temperature;
- and
- continuing to apply the electric field until the temperature of the predetermined region falls below the Curie temperature.
2 more elements
A polarizing method comprising:
- forming a metal film;
- forming, on the metal film, a piezoelectric film by a chemical solution deposition method;
- causing an electromagnetic wave emitter to emit an electromagnetic wave to an object including the metal film and the piezoelectric film, the electromagnetic wave entering the object from the metal film such that a predetermined region of the piezoelectric film is heated by the metal film to a temperature equal to or higher than a Curie temperature of the piezoelectric film;
- causing an electric charge generator to start to apply an electric field to the predetermined region while the temperature of the predetermined region is equal to or higher than the Curie temperature;
- and
- continuing to apply the electric field until the temperature of the predetermined region falls below the Curie temperature,
- wherein an end, from which the electric field is applied to the predetermined region, of the electric charge generator is located closer to the piezoelectric film than the metal film is.
4 more elements
Dependencies are inferred from the claim text.