Electric lamp and discharge devices – Cathode ray tube – Image pickup tube
Patent
1980-05-22
1982-05-18
Lieberman, Eli
Electric lamp and discharge devices
Cathode ray tube
Image pickup tube
313 94, H01J 2945, H01J 3138
Patent
active
043307337
ABSTRACT:
A photoconductive target having an electrode and a P-type conductive layer mainly made of Se and making rectifying contact at an interface with the electrode, with at least Te being doped in a portion of the P-type conductive layer. At least one metal fluoride forming shallow levels is doped in the region where the signal current is generated for the most part of the P-type conductive layer with an average concentration of not less than 50 ppm and not more than 5% by weight. The metal fluoride is preferably at least one selected from the group consisting of LiF, NaF, MgF.sub.2, CaF.sub.2, BaF.sub.2, AlF.sub.3, CrF.sub.3, MnF.sub.2, CoF.sub.2, PbF.sub.2, CeF.sub.3 and TlF. The high light sticking of the photoconductive target can thus be considerably reduced.
REFERENCES:
patent: 3890525 (1975-06-01), Hirai et al.
patent: 3984722 (1976-10-01), Maruyama et al.
patent: 4040985 (1977-08-01), Shidara et al.
Goto Naohiro
Hirai Tadaaki
Hiruma Eikyu
Ikeda Yohitsumu
Kawamura Tatsuro
Hitachi , Ltd.
Lieberman Eli
Nippon Hoso Kyokai
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