PURPOSE: To always cover a conductor exposed part with a connecting conductor even if the part is positionally deviated by forming the conductor by previously considering the contraction variation of a ceramic board on the part.

CONSTITUTION: An insulating layer 10 made of a ceramic green sheet is prepared, insulating layers 12, 14 made of insulating paste containing the same components as those of the sheet as main materials, and conductor layers 16, 18, 20 made of conductive paste containing high melting point metal such as tungsten, molybdenum, etc., as main ingredients are alternately printed to form a laminate 24 having a conductor exposed part 22, simultaneously baked to form a ceramic board 26 having conductor exposed parts 22a-22f. Further, nickel plated layer and antioxidation barrier layers 27a-27f made of melted noble metal are formed on the parts 22a-22f. Then, pastelike noble metal conductor, connecting conductors 28a-28f made of glass, etc., are so printed to be formed by using a squeegee as to cover the parts 22a-22f (the layers 27a-27f are formed in the same size), and further baked.