CNT MEMBRANE AND METHOD FOR MAKING THE SAME AND FIELD EMISSION TYPE COLD CATHODE AND IMAGE DISPLAY DEVICE USING THE CNT MEMBRANE

摘要

PROBLEM TO BE SOLVED: To provide a CNT membrane that can secure mechanical membrane strength without depending only on an organic binder, can easily obtain a flat shape without bubbles in the membrane, and can eliminate a complicated CNT refining step such as removing impurities other than nano-tubes more than necessary, and can reduce degradation in electron emission characteristic due to increase in the diameter of a bundle. SOLUTION: In this carbon nano-tube(CNT) and CNT membrane 12 containing particulate impurities, the area ratio of CNT 12a to particulate impurities in a cross section and surface structure is set in the range of 0.5:99.5 to 40:60. In such a CNT membrane 12, the particulate impurities may be made to be composed of the impurities that are obtained along with the CNT 12a during manufacture of the CNT 12a.