Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1989-11-28
1991-04-23
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310313R, 310344, 310364, 29 2535, 333153, 324723, H01L 4108
Patent
active
050102702
ABSTRACT:
Techniques for adjusting the surface acoustic wave velocity of a packaged SAW device are described. A first technique involves depositing a film from a cover of the device onto a surface wave propagating surface thereby providing a localized region on said surface where the acoustic properties and, hence, the velocity characteristics of the surface wave propagating surface are altered. An alternate embodiment of a pair of beams are directed through a transparent cover and converge on the surface wave propagating surface, selectively removing a portion of said surface to provide a localized alteration in the acoustic properties of the surface wave propagating surface.
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"Metal Deposition from a Supported Metal Film Using an Excimer Laser" by J. Bohandy et al., J. Appl. Phys. 60 (4), 15 Aug. 1986, pp. 1538-1539.
Budd Mark O.
Maloney Denis G.
Raytheon Company
Sharkansky Richard M.
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