Patent ID: 7528538

Claim:
A fiber containing carbon having both ends in its longitudinal direction, wherein the degree of crystallinity at one of the both ends is higher than a degree of crystallinity at the other portions, wherein, when in the Raman spectrum at the one end h 1 1 represents the maximum value of the Raman scattered light intensity in a range of 1355±10 kayser and h 2 1 represents the maximum value of the Raman scattered light intensity in a range of 1580±10 kayser, while when in the Raman spectrum at the other portions h 1 2 represents the maximum value of the Raman scattered light intensity in a range of 1355±10 kayser and h 2 2 represents the maximum value of the Raman scattered light intensity in a range of 1580±10 kayser, there is established the relationship: ( h 1 1 −h 1 2 )/ h 1 1 ×100≧20 and/or ( h 2 1 −h 2 2 )/ h 2 1 ×100≧20.