| http://www.w3.org/ns/prov#value | - In FIG. 8, provided on a substrate 4 such as glass and ceramics is an insulating layer 11, and further thereon electrodes 1 and 2 comprised of low-resistance materials for use in voltage application are provided giving minute spacing to form a discontinuous electron-emitting region 10 comprising fine particles 9 dispersed between them.
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