| 摘要 |
An electronic switch comprises a photosensitive semiconductor (1,11,12) and a light source (14,24) which, when actuated, illuminates the semiconductor and causes the latter to become conductive, the photosensitive semiconductor being a sintered mixture comprising, by weight, 63-74% of cadmium, 16-24% of selenium, 8-14% of sulphur, 0.1 - 1% of chlorine, and 0.005 - 0.1% of copper.
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