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US 4,062,105 AGranted
Method for fabricating ferroelectric ultrasonic transducers
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorRobert A. Day
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Abstract
A method for fabricating ferroelectric ultrasonic transducers by directing beam of electrons at a disk of ferroelectric material to produce a thin plate throughout which the Curie temperature is exceeded, and by applying a high DC Voltage across the faces of the disk while the Curie temperature is exceeded to polarize the thin plate.
Claims2
A method for fabricating ferroelectric ultrasonic transducers comprising the steps of:
- a. placing a ferroelectric material in a vacuum, said ferroelectric material having opposing faces with thin electrically conductive surfaces thereon, which surfaces are electrically insulated from each other;
- b. directing a beam of electrons at one face of said ferroelectric material to produce a plate in said ferroelectric material, said plate being defined as the region within said ferroelectric material in which the Curie temperature is everywhere exceeded;
- and
- c. imposing a high potential difference between said conductive surfaces while the Curie temperature of said plate is exceeded to polarize said plate.
1 more element
Dependencies are inferred from the claim text.