Abstract

Sputter coating for the preparation of biological and textile materials for scanning electron microscopy appears to be superior to conventional thermal evaporation in both ease of operation and results. The commercial units for sputter coating are pumped by rotary pumps alone and are thus often inferior in the cleanliness of vacuum that can be achieved compared to the vacuum coating equipment which is standard in most electron microscopy laboratories. The present paper shows how standard type vacuum coating units can be converted for sputter coating (without detriment to other functions) at a cost which is considerably less than that of commercial sputter units.

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