H - Electricity – 01 – L
Patent
H - Electricity
01
L
310/2, 349/67.4
H01L 41/08 (2006.01) H01L 41/083 (2006.01) H01L 41/09 (2006.01)
Patent
CA 1239965
ABSTRACT OF THE DISCLOSURE: In an electrostriction transducer comprising protection layers (21, 22) in which no electric fields are produced during operation, each of end electrostriction layers (41, 42) which are contiguous to the respective protection layers with pertinent ones of internal electrodes (16, 17) interposed, is given a thicker thickness (at) as compared with other or intermediate electrostriction layers (23) to make the transducer have a long life and a high reliability. The intermediate electrostriction layers may have a common thickness (t). Alternatively, the intermediate electrostric- tion layers may have monotonously decreasing thicknesses when placed nearer to a plane which bisects a pile (19) of the electrostric- tion layers parallel to both end surfaces of the pile. When a pair of holding members for the transducer are used on both longitudinal ends, each protection layer is preferably received in an indent formed in the holding member. Alternatively, it is preferred that each holding member should comprise a metal plate contiguous to the protection layer and a metal band surrounding parts of the metal plate and the protection layer.
465838
Fukui Izumu
Inui Osamu
Ochi Atsushi
Sato Eiichi
Takahashi Sadayuki
Nec Tokin Corporation
Smart & Biggar
LandOfFree
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