electron gun applying cold cathode

PURPOSE: An electron gun having a cold cathode is provided to reduce a divergent angle of electron by forming a grid having apertures of various shapes and electron emission sources of uniform height. CONSTITUTION: A substrate(61) is formed with a glass or a wafer. A conductive cathode(62) is formed on an upper face of on the substrate(61). An insulating layer(63) is formed on an upper face of the conductive cathode(62). An electron emission source(64) is formed on an upper face of the cathode(62) through a cavity(65). The cavity(65) is formed on a part of the insulating layer(63). The electron emission source(64) has an erect shape. The electron emission source(64) is formed with a carbon nano tube or a graphite or a diamond like carbon. A grid(66) of metal material is formed on an upper face of the insulating layer(63). A multitude of apertures(66a) are formed in the grid(66) to emit electron beam from the electron emission sources(64). The apertures(66a) have various shapes. 냉음극을 채용한 전자총을 개시한다. 본 발명은 기판과, 기판상에 형성되는 음극과, 음극의 윗면에 형성되는 캐비티가 형성된 절연체층과, 캐비티에 해당되는 음극의 윗면에 형성되는 적,녹,청색의 전자방출원과, 절연체층의 윗면에 형성되며 자방출원상에 다수개의 개구공이 형성된 그리드로 된 게이트전극을 포함하고, 전자방출원은 적,녹,청색의 전자빔이 방출가능하도록 음극의 윗면에 균일한 높이를 가지고 직립한 형태로 형성된다.