Semiconductor device for generating an electron beam
CA 1253260 A · Owner: N.V.Philips'Gloeilampenfabrieken · Inventors: Van 'T Blik, Henri F.J.; Van Gorkom, Gerardus G.P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
9, ABSTRACT:, Semiconductor device for generating an electron current. A semiconductor cathode is realized with the aid of a pin structure in which the intrinsic semiconductor region (5, 6) comprises a first region (6) with a small. band distance and a second region (5) with a large band distance. Consequently, at a sufficient reverse voltage electrons (13) are generated in the first region (6) which electrons tunnel from the valence band to the conduction band and have a sufficient potential energy to be emitted from the semiconductor body (1).
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 25, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 25, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.