METHOD OF SURFACE TREATMENT AND SURFACE-TREATED ARTICLE

摘要

A plasma generated in water vapor bubbles (17) present in a water-containing liquid (11) is brought into contact, in the liquid (11), with an article (15) having a contact angle with water of 90° or smaller. The plasma is contacted with an organic substance adherent to the article (15) to thereby remove the organic substance from the material. By bringing the plasma into contact with the article (15), the surface of the material is etched without breaking the article (15). The article (15) may comprise a material composed of both a hydrophobic part having a contact angle with water exceeding 90° and a hydrophilic part having a contact angle with water of 90° or smaller. In this case, only the hydrophobic part is etched by bringing the plasma into contact with the article (15).