Patent ID: 6982224

Claim:
A method for forming metal wires in a semiconductor device, comprising the steps of: forming a porous dielectric film on a semiconductor substrate as an insulating film between metal wires; selectively etching the porous dielectric film to form an aperture defining a metal wire region; infiltrating sealing particles into pores of the porous dielectric film exposed on the sidewall of the aperture; implementing an annealing process for agglomerating the sealing particles to seal the entrances of the pores of the porous dielectric film exposed on the sidewall of the aperture; forming an anti-diffusion film at the bottom and on the sidewall of the aperture; forming a metal film on the anti-diffusion film; and polishing the metal film and the anti-diffusion film until the top of the porous dielectric film is formed to metal wires within the aperture.