Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1995-09-15
1997-09-02
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
H01L 4122
Patent
active
056636067
ABSTRACT:
Interleaved patterns of oppositely-poled regions are formed in a piezoelectric film by a technique in which an unpoled film is positioned between the pairs of an electromechanical apparatus with a pattern of like-poled electrodes movable into juxtaposition with the surfaces of the film which already includes on its surfaces the complementary (oppositely-poled) pattern of electrodes. In a second embodiment, a piezoelectric film is threaded about two drums with complimentary electrode patterns imbedded in the drum surfaces. The two patterns interleave with one another and are held at opposite potentials to impose the requisite poling pattern as a film wrapped about the drums moves in consecutive, but opposite directions. In a third embodiment, a piezoelectric film is positioned between two printed circuit boards which have complementary patterns of electrodes. The electrodes are held at suitable potentials while consecutive sections of the film are moved into position to be held between the "jaws" of the two printed circuit boards while the requisite poling pattern is imposed on each section of the film in turn.
REFERENCES:
patent: 3213027 (1965-10-01), Fatuzzo et al.
patent: 4088917 (1978-05-01), Martin et al.
patent: 4340786 (1982-07-01), Tester
patent: 4345359 (1982-08-01), Micheron
patent: 4365283 (1982-12-01), Radice
patent: 5045747 (1991-09-01), Chen et al.
Dougherty Thomas M.
Shapiro Herbert M.
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