A semiconductor device which comprises a first insulator, a first conductor disposed on one side near a semiconductor substrate, a second conductor disposed on the opposite side to the substrate forming a tubular member together with the first conductor, and a second insulator surrounding the member. The first insulator is incorporated into the member, and the member and the first insulator constitute an electrical wiring. Since the wiring is composed of the first insulator and the first and second conductors surrounding the first insulator, an electric current flows the tubular member of the conductors. Therefore, when the device is operated by a high-frequency (for example 80 GHz or more) electric current, apparent increase of the wiring resistance due to the 'skin effect' hardly occur and as a result, reduction of the operating speed can be prevented.
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An application with the status "Published" (which means it is pending) may be recently abandoned, but not yet updated to reflect its abandoned status. However, an application filed less than one year ago is unlikely to be abandoned.
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