Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1995-05-05
1996-12-31
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310330, 310371, 310331, H01L 4108
Patent
active
055897258
ABSTRACT:
Monolithic, internally asymmetrically stress biased electrically active ceramic devices and a method for making same is disclosed. The first step in the method of the present invention is to fabricate a ceramic element having first and second opposing surfaces. Next, only the first surface is chemically reduced by heat treatment in a reducing atmosphere. This produces a concave shaped, internally asymmetrically stress biased ceramic element and an electrically conducting, chemically reduced layer on the first surface which serves as one of the electrodes of the device. Another electrode can be deposited on the second surface to complete the device. In another embodiment of the present invention two dome shaped ceramic devices can be placed together to form a completed clamshell structure or an accordion type structure. In a further embodiment, the clamshell or accordion type structures can be placed on top of one another. In another embodiment, a pair of dome shaped ceramic devices having opposing temperature characteristics can be placed on top of each other to produce an athermalized ceramic device.
REFERENCES:
patent: 2659829 (1953-11-01), Baerwald
patent: 2756353 (1956-07-01), Samsel
patent: 3076903 (1963-02-01), Schwartz
patent: 3447217 (1969-06-01), Kumada
patent: 3458915 (1969-08-01), Miller et al.
patent: 3588552 (1971-06-01), Schafft
patent: 3676722 (1972-07-01), Schafft
patent: 3816774 (1974-06-01), Ohnuki et al.
patent: 4078160 (1978-03-01), Bost
patent: 4533849 (1985-08-01), Schnell
patent: 4927084 (1990-05-01), Brandner et al.
patent: 4987515 (1991-01-01), Iwaya et al.
patent: 4999819 (1991-03-01), Newnham et al.
patent: 5091820 (1992-02-01), Iwaya et al.
P. Atherton, "Technology Trends, Micropositioning Using Piezoelectric Translators", Photonics Spectra, pp. 51-54 (1987).
K. Uchino, "New Monolithic Actuators, Monomorphs, Using Semiconductor Ferroelectrics", Yogyo-Kyokai-Shi, vol. 95, pp. 722-735 (1987).
R. E. Newnham et al., "Flextensional Transducers", ONR Transducer Materials Review, Abstract Booklet (1992).
K. Uchino, "Actuators Studies", ONR Transducer Materials Review, Abstract Booklet (1992).
G. H. Haertling, "Kinetics of the Reduction of Lead Compounds and Glasses", J. of Amer. Ceramic Soc., vol. 48, No. 1, pp. 35-40 (1965).
G. H. Haertling, "Ferroelectric Thin Films For Electronic Applications", J. Vac. Sci. Technol. A., vol. 9, pp. 414-420 (1991).
G. H. Haertling, "Current Status of Thin/Thick Film Ferroelectrics", Ferroelectric Films, pp. 1-18 (1980).
G. H. Haertling, "Piezolectric and Electrooptic Ceramics", Ceramic Material For Electron Process, Prep. and Appl., pp. 139-225 (1986).
G. H. Haertling, "Reduction/Oxidation Effects in PLZT Ceramics", 4th International SAMPLE Electronics Conference, pp. 699-7711 (1990).
G. H. Haertling, "Photoelectronic Effects in PLZT Ceramics", Electro-Optics & Nonlinear Optics, pp. 21-50.
C. E. Land, "Electrooptic Ceramics", Appl. Solid State Science, vol. 4, pp. 137-233 (1974).
G. H. Haertling, "Recent Developments in Bulk and Thin Film PLZT Materials and Devices", Ferroelectrics, vol. 131, pp. 1-12 (1992).
G. H. Haertling, "PLZT Electrooptic Materials and Applications--A Review", Ferroelectrics, vol. 75, pp. 25-55 (1987).
G. H. Haertling, "Ceramic Superconducting Components" Superconductivity II, 537-545.
Budd Mark O.
Research Corporation Tech. Inc.
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