A robot system includes a robot. 5 to 30 parts by weight of a acrylic ester polymer or a polymer mixture obtained by polymerizing from 0 to 50 parts by weight of a monomer mixture in the presence of a polymer latex which is obtained by emulsion-polymerizing from 50 to 100 parts by weight of a monomer mixture wherein, when 0. The metallized ceramics substrate does not cause a problem of interlayer peeling and is excellent in airtightness and electric conductivity.