A repeated transfer-and-etch process was used to control surface resistivity.
2.
These aging processes will gradually discolor the surface grayish green to brown and cause rapid deterioration of electric surface resistivity.
3.
If the second figure is taken to be two round pads on a printed circuit board that has surface contamination resulting in a surface resistivity of R s ( 50 M? per square, for example ) then the resistance between the two pads is given by:
4.
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 ).
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