Patent ID: 6498398
Filing Date: 2002-12-24
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate having semiconductor elements, and a plurality of wirings formed on the semiconductor substrate via an isolation film, wherein the wirings are formed in at least one layer level so that the region in which the wirings are formed is divided into at least one wiring region of small wiring-to-wiring distance between adjacent wirings and at least one wiring region of large wiring-to-wiring distance between adjacent wirings; a first inter-level isolation film is selectively formed only in the wiring region having said small wiring-to-wiring distance, said first inter-level isolation film covering at least a portion of a top surface and at least a portion of a side surface of the wirings of small wiring-to-wiring distance; a second inter-level isolation film is formed in the wiring region having said large wiring-to-wiring distance to cover the wirings; throughholes are formed only in the second inter-level isolation film; and the dielectric constant of the first inter-level isolation film is smaller than the dielectric constant of the second inter-level isolation film.