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Oxidized porous silicon field emission devices
(United States. Patent and Trademark Office, 1995-07-04)
A low voltage vacuum field emission device and method for manufacturing is provided. The devices are fabricated by anodizing a heavily doped silicon wafer substrate (12) in concentrated HF solution, forming extremely sharp ...
Range measurement system
(United States. Patent and Trademark Office, 1995-06-27)
A vehicle control system (12) is provided which comprises a range measurement system (14) which transmits a signal (20) to a target (22) and receives an echo signal (24) returned from the target (22). The range measurement ...