| 摘要 |
Disclosed is a method for decreasing the dielectric constant of an insulating film which is formed by a chemical vapor deposition method and contains Si, O and CH. A process gas containing hydrogen atoms is supplied into a reaction chamber of a plasma processing apparatus. Microwaves are introduced into the reaction chamber for supplying uniform electromagnetic waves therein, thereby generating a plasma containing hydrogen radicals in the reaction chamber. Due to the hydrogen radicals contained in the plasma with which an insulating film is irradiated, the structure of the insulating film is changed and the dielectric constant of the insulating film is decreased. The microwaves are supplied into the reaction chamber via a radial slot antenna.
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