A method of reducing the roughness profile in a plurality of patterned resist features. A head IC chip mounting portion is provided between the extending end and the other end of the suspension. Therefore, it leads to greater scalability of applications running on large parallel machines. The direct current power source is coupled electrically to the fan motor, and includes a storage battery and an electrical plug connected to the storage battery. The storage stable particles are formed by a solid state crystallization of allotropic organic compounds. The present invention provides a process for producing a vinyl polymer terminated with a group having a polymerizable carbon-carbon double bond, the process being characterized by adding a stable free radical compound as a polymerization inhibitor.