| http://www.w3.org/ns/prov#value | - e; a single metal contact on a portion of the contacting surface spaced from the sides and adjacent the emitting surface, said contact extending from the emitting surface a distance no more than one-quarter the distance from the emitting surface to the opposite surface; an insulating layer on the contacting surface except for that portion of the contacting surface on which is the metal contact; an
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