Fishing – trapping – and vermin destroying
Patent
1992-02-26
1994-10-25
Thomas, Tom
Fishing, trapping, and vermin destroying
437250, 437927, 156641, 156657, 156643, H01L 21465
Patent
active
053589092
ABSTRACT:
A field-emitter having stable electrical properties, a long service life and a very small electron emission voltage is provided. The cathode of the element has a strongly sharpened projection at the tip end, and a smooth connection between the projection and the body portion. In the method of manufacturing the elements, cathodes are produced with a high reproducibility by using a mold produced by forming concave portions in the silicon and oxidizing the layer thereon, whereby the spacing between the cathode and the gate electrode is determined by the thickness of the silicon oxide layer, and the position of the cathode is determined by the silicon oxide layer embedded in the silicon substrate, by using an etching stop method based on an electrochemical etching process.
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Hashiguchi Gen
Kanazawa Satoshi
Kawamura Kazuhiko
Sakamoto Hikaru
Nippon Steel Corporation
Thomas Tom
Trinh Michael
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