Patent ID: 8513097

Claim:
A method for performing plasma processing on an object, which is attached on an upper surface of an adhesive sheet held by a holder frame supporting the periphery of the adhesive sheet, mounted on a stage that is located in a vacuum chamber and that has a lower electrode and a table disposed on a periphery side of the lower electrode, the method comprising the steps of: positioning the holder frame on the table and positioning the object to be treated on the lower electrode by mounting the object to be treated with the holder frame on the stage with alignment of a center of the mounted object and a center of the stage; covering an upper surface of the holder frame thoroughly with a dielectric cover member that makes contact with the upper surface of the holder frame while keeping a distance from and not touching the adhesive sheet and exposing the object to be treated through an opening formed in a center of the dielectric cover member; exhausting air from the vacuum chamber; and supplying gas to the vacuum chamber, applying high-frequency voltage to the lower electrode, and generating plasma in the vacuum chamber for performing plasma processing of the object to be treated that is exposed from the opening.