Abstract
Evaporated CdS films are used as photo conductors for making an array of light sensitive resistors. The contacts and conductor tracks are made on the substrate glass prior to the evaporation of the CdS layer. These contacts have to withstand the high-temperature treatment to which the CdS layer is subjected to make it photo-sensitive. Gold contacts with a molybdenum underlayer appear to be satisfactory as for adherence to the glass and ability to withstand the high temperature treatment. The importance of adding the correct amount of oxygen during the activation process is shown once again. The change of dark current has been recorded during this process. Finally some properties are given of these light sensitive resistors a.o. light- and dark current and spectral response.
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