Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1996-12-12
1998-09-15
Ledynh, Bot L.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
3613211, 3613215, 361313, H01G 406
Patent
active
058088563
ABSTRACT:
A high energy multilayer ceramic capacitor formed of alternating ceramic and electrode layers, the capacitor being suitable for use in implantable medical devices. The ceramic layers are comprised of a dielectric composition of lead magnesium niobate with small amounts of dopants, namely, lithium niobate, copper oxide, magnesium titanate, manganese niobate, and zirconium oxide, with appropriate electrical terminations connected to the electrode layers. The capacitor thus fabricated exhibits greatly reduced ferroelectric effect, namely, less than 30% over a bias range of 0-1,000 volts. It has a breakdown voltage of at least 700 volts, a leakage current less than 10 pico amps at 1,000 volts, an energy density of greater than 10 J/cc, has a rectangular form factor 1.5 inches by 2.0 inches by 0.06 inch thick, and weighs no more than 30 grams.
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Bischoff Michael G.
Bischoff William P.
Ledynh Bot L.
Microelectronic Packaging Inc.
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