Patent ID: 6221489
Filing Date: 2001-04-24
Classification: D01F,Y10S,Y10T

Abstract:
A vapor-grown carbonaceous fiber comprising planes formed of carbon atoms in a condensed ring structure concentrically grown around a center longitudinal axis of said fiber, and sharp ends at both ends of said fiber, wherein d.sub.1 /d.sub.0 <0.5 and L/d.sub.0 >0.5, wherein d.sub.0 is a main diameter of said carbonaceous fiber, d.sub.1 is a diameter at said sharp ends of said carbonaceous fiber, and L is a distance from said sharp ends of said carbonaceous fiber to a start point where the diameter starts to decrease. said sharp ends of said carbonaceous fiber, and L is a distance from said sharp ends of said carbonaceous fiber to a start point where the diameter starts to decrease.