Gold, or alloys of gold and palladium, are applied as conductive coating to biological specimens and other non-conducting materials such as plastics and glass to be viewed in a scanning electron microscope.
22.
It is most notably used in the semiconductor industry, in low-melting-point metal alloys such as solders, in soft-metal high-vacuum seals, and in the production of transparent conductive coatings of indium tin oxide ( ITO ) on glass.
23.
This is accomplished by either or both of two techniques : the diaphragm's conductive coating is chosen and applied in a manner to give it a very high surface resistivity, and / or a large value resistor is placed in series between the EHT ( Extra High Tension or Voltage ) power supply and the diaphragm ( resistor not shown in the diagram here ).
