Patent ID: 6060823
Filing Date: 2000-05-09
Classification: H01J

Abstract:
A field emission cold cathode element comprising:a first n-type semiconductor region formed as a unit with the substrate;a second n-type semiconductor region that is formed above said first n-type semiconductor region, that is electrically connected on its bottom surface to said first n-type semiconductor region;a third n-type semiconductor region that is formed on said second n-type semiconductor region, that is electrically connected on its bottom surface to said second n-type semiconductor region;and at least one emitter provided with a sharp tip that emits electrons arranged on said third n-type semiconductor region;wherein said second n-type semiconductor region has a smaller cross section than the cross section of said third n-type semiconductor region when said second n-type semiconductor region and said third n-type semiconductor region are cut along planes parallel to said substrate.