Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1995-09-15
1997-08-12
Picard, Leo P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361303, 3613063, 3613212, 361313, H01G 438
Patent
active
056571992
ABSTRACT:
Leaded electrical circuits and components, typically receivers and amplifiers used in micro-miniature hearing aids, are closely physically mounted by their leads extending within laser-drilled through-holes, typically three such holes, to multiple buried-substrate capacitors within a monolithic ceramic multiple capacitor. Electrical connection to the leads does not transpire within the holes, but rather though soldered or like connection to conductive pads surrounding the holes and continuing first as circuit traces on the top of the monolith, and then as electrically-conductive trace or castellations on the sides of the monolith, until reaching electrodes of the buried-substrate capacitors patterned so as to be brought to side surfaces of the monolith. The direct electrical connection is normally to multiple plates of plural buried-substrate capacitors, typically including a relatively large, typically 1.0 .mu.farad, capacitor in electrical parallel with a smaller, typically 100 picofarads, capacitor. Both capacitances jointly serve as an effective filter to noise in two separate frequency bands, typically centered about 100 kHz and about 100 MHz.
REFERENCES:
patent: 3379943 (1968-04-01), Breedlove
patent: 5177663 (1993-01-01), Ingleson et al.
patent: 5497129 (1996-03-01), Mantese et al.
Devoe Alan D.
Devoe Daniel F.
Dinkins Anthony
Fuess William C.
Picard Leo P.
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