PURPOSE: To contrive the improvement in reliability by blocking the penetration of contaminants such as alkaline metal ions from the input terminal part and the output terminal part by a method wherein a semiconductor device is coated with an insulation protector from the input terminal to the output terminal and then provided with conductors on the input side and the output side, respectively.

CONSTITUTION: The whole surface is coated with a passivation film 3 by including each pad part 1, and a recess is formed in the surface of the passivation film 3 on each pad part 1. An Al layer 5 is evaporated in this recess, and a capacitor whose one electrode is the pad 1 and other electrode is the Al layer 5 formed at the part of each pad 1. This manner eliminates the exposure of the pad part into the atmosphere because all the pads 1 are completely coated with the passivation film 3, and contaminants can be blocked from penetrating inside from the part of the pad 1. Therefore, an LSI chip can be prevented from contamination, and the improvement in reliability can be realized.