Multi-alkali photocathode layer formed on glass substrate - after pretreatment of glass with alkali to form seed nuclei increasing sensitivity of photocathode
Номер патента: DE2810350A1
Опубликовано: 20-09-1979
Автор(ы): Albert Dipl Ing Lieb, Bruno Bolz, Hans-Peter Dr Rer Na Streissle, Hermann Dr Rer Nat Widmann, Karl Burtsche
Принадлежит: Licentia Patent Verwaltungs GmbH
Опубликовано: 20-09-1979
Автор(ы): Albert Dipl Ing Lieb, Bruno Bolz, Hans-Peter Dr Rer Na Streissle, Hermann Dr Rer Nat Widmann, Karl Burtsche
Принадлежит: Licentia Patent Verwaltungs GmbH
Реферат: The substrate consists of one or more glasses, and is pretreated with an alkali soln. (1), esp. a lye, and then washed, followed by the vapour deposition of the components, viz. Na, K, Sb, Cs, forming the photocathode layer. Soln. (1) pref. has pH 8-13, esp. 8-10 and contains NaOH, KOH, NH4OH, milk of lime, phosphate, borate, perborate, Na2 O2 or similar cpds. The pref. soln. (1) contains a mixt. of NaOH and KOH, or KOH and NH4OH; or KOH and Ca(OH)2; and is pref. rubbed into the surface of the glass, followed by washing to remove excess soln., leaving an alkaline surface. The residual alkali on the surface of the substrate functions as seed nuclei or as a catalyst, so vapour deposition produces a uniform photocathode layer with high sensitivity.
Prodn. of multi alkali photocathode - forms cathode layers by vacuum evaporation on to cathode support and subsequent heating
Номер патента: DE2547222A1. Автор: Juergen Pohl. Владелец: Licentia Patent Verwaltungs GmbH. Дата публикации: 1977-04-28.