Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1980-09-18
1984-02-14
Wojciechowicz, Edward J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
357 51, 361283, 338 4, 73718, 73724, H01L 2984, H01L 2966
Patent
active
044320078
ABSTRACT:
An array of electrostatic transducers is fabricated on a monolithic integrated circuit chip having provision for detection, amplification, and signal processing of received echoes. The transducer is multilayered with the form of a parallel plate capacitor, and is made by laterally etching an insulating layer through a small hole in the overlying layer to create a void region, then depositing a sealing layer to seal the etch holes. The upper metallic layers cover the transducer array and other monolithic circuitry and are etched to be interconnections for the various components.
REFERENCES:
patent: 3715638 (1973-02-01), Polye
patent: 3973146 (1976-08-01), Arnold et al.
Campbell Donald R.
Davis Jr. James C.
General Electric Company
Snyder Marvin
Wojciechowicz Edward J.
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