GB1086228A - Improvements in or relating to electric discharge devices comprising a photocathode - Google Patents

Improvements in or relating to electric discharge devices comprising a photocathode

Info

Publication number
GB1086228A
GB1086228A GB50530/65A GB5053065A GB1086228A GB 1086228 A GB1086228 A GB 1086228A GB 50530/65 A GB50530/65 A GB 50530/65A GB 5053065 A GB5053065 A GB 5053065A GB 1086228 A GB1086228 A GB 1086228A
Authority
GB
United Kingdom
Prior art keywords
gallium
photocathode
semi
gallium arsenide
image
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
Application number
GB50530/65A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1086228A publication Critical patent/GB1086228A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
    • H01J40/02—Details
    • H01J40/04—Electrodes
    • H01J40/06—Photo-emissive cathodes
    • 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
    • H01J1/34—Photo-emissive cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/38—Photoelectric screens; Charge-storage screens not using charge storage, e.g. photo-emissive screen, extended cathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/34—Photoemissive electrodes
    • H01J2201/342—Cathodes
    • H01J2201/3421—Composition of the emitting surface
    • H01J2201/3423—Semiconductors, e.g. GaAs, NEA emitters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00—Metal treatment
    • Y10S148/12—Photocathodes-Cs coated and solar cell

Landscapes

  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

1,086,228. Photocathodes; semi-conductors. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Nov. 29, 1965 [Dec. 2, 1964], No. 50530/65. Headings H1D and H1K. A photocathode consists of a P-type semiconductor activated with an alkali metal, with or without oxygen, the semi-conductor comprising a compound of one of the elements of the third column of the periodical system, e.g. B, Al, Ga, In, and one of the elements of the fifth column, e.g. N, P, As, Sb, or mixed crystals of these compounds, with an energy gap lying between 1À1eV and 1À6eV. The semiconductor may be gallium arsenophosphide, or gallium arsenide having an acceptor concentration of 10<SP>18</SP>-10<SP>20</SP>, e.g. 4 x 10<SP>19</SP>, atoms per cm.<SP>3</SP>, the acceptor being Zn, Cd, Hg or Te. The gallium arsenide may contain ¢% of gallium phosphide or gallium antimonide. The photocathode may be used in a photo-cell, a photomultiplier, an image intensifier, an image iconoscope, or an image orthicon. During manufacture of a photo-cell, a gallium arsenide crystal may be severed by a knife supported by a movable metal part of the sealed envelope, Fig. 1 (not shown), before application of a monoatomic caesium layer by evaporation. Alternatively, a P-type semi-conductor may be applied by vaporization to a curved molybdenum plate, or to a portion of the tube envelope, and exposed to caesium vapour, to produce a layer 1000Š thick.
GB50530/65A 1964-12-02 1965-11-29 Improvements in or relating to electric discharge devices comprising a photocathode Expired GB1086228A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL646413961A NL147572B (en) 1964-12-02 1964-12-02 ELECTRIC DISCHARGE TUBE WITH A PHOTO CATHOD.

Publications (1)

Publication Number Publication Date
GB1086228A true GB1086228A (en) 1967-10-04

Family

ID=19791550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50530/65A Expired GB1086228A (en) 1964-12-02 1965-11-29 Improvements in or relating to electric discharge devices comprising a photocathode

Country Status (10)

Country Link
US (1) US3387161A (en)
AT (1) AT255506B (en)
BE (1) BE673078A (en)
CH (1) CH441527A (en)
DE (1) DE1256808B (en)
DK (1) DK120403B (en)
ES (1) ES320158A1 (en)
GB (1) GB1086228A (en)
NL (1) NL147572B (en)
SE (1) SE325968B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3521073A (en) * 1965-11-26 1970-07-21 Gen Dynamics Corp Light emitting semiconductor diode using the field emission effect
GB1200899A (en) * 1967-04-21 1970-08-05 Mullard Ltd Improvements in or relating to photocathodes
NL6903628A (en) * 1968-03-15 1969-09-17
US3575628A (en) * 1968-11-26 1971-04-20 Westinghouse Electric Corp Transmissive photocathode and devices utilizing the same
US3631303A (en) * 1970-01-19 1971-12-28 Varian Associates Iii-v cathodes having a built-in gradient of potential energy for increasing the emission efficiency
US3667007A (en) * 1970-02-25 1972-05-30 Rca Corp Semiconductor electron emitter
US3699404A (en) * 1971-02-24 1972-10-17 Rca Corp Negative effective electron affinity emitters with drift fields using deep acceptor doping
US3769536A (en) * 1972-01-28 1973-10-30 Varian Associates Iii-v photocathode bonded to a foreign transparent substrate
US3960421A (en) * 1972-03-27 1976-06-01 U.S. Philips Corporation Method of manufacturing a non-thermally emitting electrode for an electric discharge tube
US3958143A (en) * 1973-01-15 1976-05-18 Varian Associates Long-wavelength photoemission cathode
US3845496A (en) * 1973-09-10 1974-10-29 Rca Corp Infrared photocathode
US3986065A (en) * 1974-10-24 1976-10-12 Rca Corporation Insulating nitride compounds as electron emitters
US4816183A (en) * 1986-08-21 1989-03-28 The Board Of Trustees Of The Leland Stanford Junior University Composite photosensitive material
US5982093A (en) * 1997-04-10 1999-11-09 Hamamatsu Photonics K.K. Photocathode and electron tube having enhanced absorption edge characteristics
JPH1196896A (en) * 1997-09-24 1999-04-09 Hamamatsu Photonics Kk Semiconductor photoelectric surface
EP1598844B1 (en) * 2003-01-17 2010-09-22 Hamamatsu Photonics K. K. Alkali metal generating agent and uses thereof for producing a photo-cathode and a secondary-electron emitting surface

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB853352A (en) * 1957-12-16 1960-11-02 Vickers Electrical Co Ltd Improvements relating to electron emitters
FR1204367A (en) * 1958-03-24 1960-01-26 Csf Semiconductor cold thermoelectronic cathode

Also Published As

Publication number Publication date
ES320158A1 (en) 1966-04-16
CH441527A (en) 1967-08-15
AT255506B (en) 1967-07-10
NL6413961A (en) 1966-06-03
SE325968B (en) 1970-07-13
DE1256808B (en) 1967-12-21
DK120403B (en) 1971-05-24
US3387161A (en) 1968-06-04
BE673078A (en) 1966-05-31
NL147572B (en) 1975-10-15

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