ELECTRIC STRUCTURE AND FORMATION METHOD FOR IT

摘要

PROBLEM TO BE SOLVED: To allow easy re-working by jointing a second conductor to an uncoated surface of a first conductor mechanically and electrically, and jointing the second conductor to a second substrate mechanically and electrically. SOLUTION: Two pads 16 are provided on a surface 13 of a first substrate 12, and a first conductor 14 is formed on each of the pads 16. The first conductor 14 and an upper surface 13 are washed and roughened in a plasma processing, and the first conductor 14 and the upper surface 13 are coated with a material 18 such as photo-sensitized resin. The material 18 is irradiated with the light of appropriate wavelength using a photo-mask to form an uncoated surface 26. A second conductor 52 is mechanically and electrically connected to the surface 26 while the second conductor 52 is mechanically and electrically connected to a second substrate 42 through a pad 46, for easy re-working.