| 摘要 |
A plasma processing method performs a plasma processing on a substrate mounted on a mounting table installed in an airtight processing chamber, the mounting table having a smaller size than the substrate. The substrate having a surface, on which a resist mark is formed, is mounted on the mounting table and then electrostatically adsorbed on the mounting table by applying a voltage to an electrostatic chuck. The surface of the substrate is etched by using a plasma of an etching gas while the substrate is cooled through a heat transfer between the substrate and the mounting table via a thermally conductive gas supplied between a top surface of the mounting table and a bottom surface of the substrate. The supply of the thermally conductive gas is stopped, and the resist mask on the substrate is ashed by using a plasma of an ashing gas containing O<SUB>2</SUB>.
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