GB853352A - Improvements relating to electron emitters - Google Patents
Improvements relating to electron emittersInfo
- Publication number
- GB853352A GB853352A GB39061/57A GB3906157A GB853352A GB 853352 A GB853352 A GB 853352A GB 39061/57 A GB39061/57 A GB 39061/57A GB 3906157 A GB3906157 A GB 3906157A GB 853352 A GB853352 A GB 853352A
- Authority
- GB
- United Kingdom
- Prior art keywords
- semi
- disc
- cathode
- conducting
- conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/30—Cold cathodes, e.g. field-emissive cathode
- H01J1/308—Semiconductor cathodes, e.g. cathodes with PN junction layers
Landscapes
- Electron Sources, Ion Sources (AREA)
- Electron Beam Exposure (AREA)
- Non-Adjustable Resistors (AREA)
- Cold Cathode And The Manufacture (AREA)
Abstract
853,352. Discharge tubes ; cathode materials. METROPOLITAN-VICKERS ELECTRICAL CO. Ltd. Dec. 9, 1958 [Dec. 16, 1957], No. 39061/57. Class 39(1). A discharge tube includes a cathode comprising a body of homogeneous semi-conductor material and terminals or contacts at points spaced apart on the surface of said semiconductor body so that a voltage may be applied across it. The emission is stated to be due to a " hot electron " effect. Fields are required which, if applied for any length of time, would cause excessive heating of the semi-conductor lattice and disruption thereof. It is thus necessary to use a pulsed field of a maximum value less than the dielectric breakdown field of the particular material used. Some moderate heating of the lattice is advantageous as this leads to increased electron densities. It is also necessary to use semi-conductors with a sufficiently large forbidden energy gap to allow for high electron energies before avalanche breakdown sets in. Suggested suitable semi-conductors are the elements and compounds of the elements of Group IV of the periodic table, such as Ge, Si and SiC, which exhibit mobilities. The semi-conducting cathode may be coated with a substance of low work function, e.g. caesium. In one arrangement, Fig. 1, a disc 6 of semi-conductor material is mounted on an insulating block 7 carried on a base plate 1 of conducting material, e.g. copper, sealed by means of an insulating cylinder 3 to a plate 2 supporting a rod 4 carrying an anode disc 5. Conductor strips 8 and 9 extend from opposite edges of the disc 6 to a copper ring electrode 10 and the base plate 1 which are connected across a pulse generator 12. A high D.C. voltage is applied between the anode 5 and cathode 6 by a source 13. In an alternative embodiment, Fig. 2 (not shown), a rod of semi-conductor material is mounted axially in a conducting cylinder to form a diode. In a further alternative embodiment, Fig. 3, the semi-conductor material is in the form of a hollow cylinder 21 across which pulses are applied by a generator 12 connected to conducting rings 22 and 23. The anode 5 is supported by a rod 4 carried by an insulating plate 24. A disc 29, preferably of insulating material, is sealed across the ring 22. Additional accelerating electrodes similar to the ring 23 may be provided, Fig. 6 (not shown).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB39061/57A GB853352A (en) | 1957-12-16 | 1957-12-16 | Improvements relating to electron emitters |
US779953A US3114070A (en) | 1957-12-16 | 1958-12-12 | Electron emitters |
DEM39932A DE1099653B (en) | 1957-12-16 | 1958-12-13 | Semiconductor electron emitter, the surface of which delimits an evacuated space |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB39061/57A GB853352A (en) | 1957-12-16 | 1957-12-16 | Improvements relating to electron emitters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB853352A true GB853352A (en) | 1960-11-02 |
Family
ID=10407400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB39061/57A Expired GB853352A (en) | 1957-12-16 | 1957-12-16 | Improvements relating to electron emitters |
Country Status (3)
Country | Link |
---|---|
US (1) | US3114070A (en) |
DE (1) | DE1099653B (en) |
GB (1) | GB853352A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3277313A (en) * | 1963-07-05 | 1966-10-04 | Burroughs Corp | Solid state quantum mechanical tunneling apparatus |
NL147572B (en) * | 1964-12-02 | 1975-10-15 | Philips Nv | ELECTRIC DISCHARGE TUBE WITH A PHOTO CATHOD. |
US3500106A (en) * | 1965-09-10 | 1970-03-10 | Bell & Howell Co | Cathode |
DE4034487A1 (en) * | 1990-10-30 | 1992-05-14 | Fimml Hans | IMPROVED TUNNEL CATHODE WITH INCREASED EMISSION |
FR2793602B1 (en) | 1999-05-12 | 2001-08-03 | Univ Claude Bernard Lyon | METHOD AND DEVICE FOR EXTRACTING ELECTRONS IN A VACUUM AND EMISSION CATHODES FOR SUCH A DEVICE |
US6806630B2 (en) * | 2002-01-09 | 2004-10-19 | Hewlett-Packard Development Company, L.P. | Electron emitter device for data storage applications and method of manufacture |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2578754A (en) * | 1951-12-18 | Sparking plug | ||
US2501089A (en) * | 1945-11-29 | 1950-03-21 | Martin A Pomerantz | Thermionic electron emitter |
NL107624C (en) * | 1955-09-01 | |||
US3029359A (en) * | 1960-03-29 | 1962-04-10 | Gen Electric | Thermionic electrode for discharge lamps |
-
1957
- 1957-12-16 GB GB39061/57A patent/GB853352A/en not_active Expired
-
1958
- 1958-12-12 US US779953A patent/US3114070A/en not_active Expired - Lifetime
- 1958-12-13 DE DEM39932A patent/DE1099653B/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1099653B (en) | 1961-02-16 |
US3114070A (en) | 1963-12-10 |
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