Patent ID: 8125134
Filing Date: 2012-02-28
Classification: H01J

Abstract:
1. An electron emitting-device, comprising: a first conductive film and a second conductive film placed on a substrate facing each other and having a first space therebetween; a first carbon film having one end and a further end, the one end connected to the first conductive film, and the further end interposed in the first space between the first conductive film and the second conductive film; and a second carbon film having one end and a further end, the one end connected to the second conductive film, and the further end of the second carbon film facing the further end of the first carbon film interposing a second space in the first space; wherein the first carbon film has a base portion and two extending portions, the base portion of the first carbon film having a first length along the Y axis which is equal to a length of a connecting portion of the first conductive film with the first carbon film and each of the extending portions of the first carbon film extending along the Y axis from a side end of the base portion to a far end respectively, so that the first carbon film has a total length along the Y axis longer than the first length and the second carbon film has a base portion and two extending portions, the base portion of the second carbon film having a second length along the Y axis which is equal to a length of a connecting portion of the second conductive film with the second carbon film and at least one extending portion of the second carbon film extending along the Y axis from a side end of the base portion to a far end respectively, so that the second carbon film has a total length along the Y axis longer than the second length, where an X axis is a direction from the first conductive film to the second conductive film, and the Y axis is a direction parallel to a surface of the surface and orthogonal to the X axis, and wherein, in the second space between the first carbon film and the second carbon film, the substrate surface has a concave portion, and the second space and the concave portion are coextending continuously respectively between a pair of the far ends of the extending portions of the first or second carbon film.