Patent ID: 7393460

Claim:
A plasma processing method, comprising: setting a state in which a target object is placed directly below a plasma generation field defined in a process chamber, the target object comprising a patterned SiOCH series film and an organic material film forming an upper layer relative to the patterned SiOCH series film; generating a plasma of a process gas containing an O 2 gas in the plasma generation field such that the plasma has an O 2 + ion density of 1×10 11 to 5×10 12 cm −3 , an oxygen radical density of 1×10 13 to 1×10 14 cm −3 , and a ratio of O 2 + ion density relative to oxygen radical density set at 0.01 to 0.2; and performing a process of removing the organic material film by use of the plasma.