construction and characteristics of an electron cyclotron resonance (ECR) ion source are emphatically introduced. An optimized triple layer window (quartz
alumina and BN) was found to be very effective in order to achieving a long lifetime
high--density plasma as well as high quantity introducing microwave. The axial magnetic field to satisfy the ECR condition (87.5mT) and to provide plasma confinement was produced by two solenoid coils with iron yokes. Three C:N films were prepared by decomposing CH4--NH3 in this source. After the films were annealed in vacuum
two of them were rent in C:N cluster fiber with different diameters.