A field emitter cold cathode has a substrate possessing a first main surface on one side of itself and a second main surface on the other side of itself and has windows formed in itself. An emitter layer is formed on the first main surface side of the substrate, and has emitters disposed at the positions...http://www.google.com.au/patents/US5749762?utm_source=gb-gplus-sharePatent US5749762 - Field emission cold cathode and method for production thereof
