Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1995-04-19
1996-08-13
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 139
Patent
active
055451845
ABSTRACT:
A cardiac defibrillator which incorporates the invention hereof includes a multilayer capacitor with a plurality of conductive electrodes and interspersed dielectric layers, each dielectric layer composed of constituents which cause the dielectric layer to exhibit antiferroelectric characteristics. The defibrillator includes a charging circuit for applying to the capacitor an electric field across each dielectric layer that is at least equal to E.sub.f, where E.sub.f is a field value that enables the dielectric layer to transition to a ferroelectric phase. A preferred dielectric material comprises lead, lanthanum, zirconium and titanium, all at constituent values which cause the resulting ceramic material to lie within the antiferroelectric region.
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Evanisko George R.
Kamm William E.
Monahan Thomas J.
The Penn State Research Foundation
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