Patent ID: 7867579

Claim:
A method for forming a carbon protective film in which a disk-shaped substrate with a magnetic film formed thereon is arranged and electrodes are arranged in spaced opposed relation to each other on both surfaces of the substrate in a film formation chamber, and then plasma is generated between the electrodes and the substrate in a carbon-containing gas thereby forming a carbon protective film on both surfaces of the substrate through a chemical vapor deposition (CVD) method, the method comprising: using, as the electrodes, electrodes whose surfaces have been subjected to a roughening treatment, a film formation step of forming a carbon protective film on the substrate in a state where the substrate is arranged in the film formation chamber, and a removing step of removing a carbon film accumulated on the surfaces of the electrodes through ashing in a state where the substrate is not arranged in the film formation chamber, and repeating the film formation step and the removing step in this sequence.