Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1996-03-25
1998-04-28
Picard, Leo P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361312, 361303, 361305, 3613063, 361763, 361760, 361751, H01G 4008, H01G 406
Patent
active
057453349
ABSTRACT:
A multi-layer printed circuit board comprises a first metallic layer, a first Ta or Hf layer on one face of the first metallic layer, a first layer of Ta.sub.2 O.sub.5 or HfO on a face of the Ta or Hf layer opposite the first metallic layer, a second metallic layer on the Ta.sub.2 O.sub.5 or HfO layer opposite the Ta or Hf layer, a first dielectric layer on the first metallic layer opposite the Ta of Hf layer, and a second dielectric layer on the second metallic layer opposite the Ta.sub.2 O.sub.5 or HfO layer. A multi-layer printed circuit board is formed by adding the following layers to form the second capacitor. A third metallic layer on said second dielectric layer, a second Ta or Hf layer on a face of the third metallic layer, a second Ta.sub.2 O.sub.5 or HfO layer on a face of the second Ta or Hf layer opposite the third metallic layer, a fourth metallic layer on the second Ta.sub.2 O.sub.5 or HfO layer opposite the second Ta or Hf layer, and a third dielectric layer on the fourth metallic layer opposite the second Ta.sub.2 O.sub.5 or HfO layer.
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IBM Technical Disclosure Bulletin vol. 22, No. 6, Nov. 1979, "Raw Card Composite Capacitor".
Thin Film Materials Research., Giannelis et al, Nov. 1993.
Hoffarth Joseph Gerard
Lauffer John Matthew
Mahmoud, deceased Issa Said
Dinkins Anthony
International Business Machines - Corporation
Picard Leo P.
Samodovitz Arthur J.
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