Patent ID: 8623771

Claim:
A method for fabricating a micropattern of a semiconductor device, the method comprising: forming a first hard mask over an etch target layer; forming a first sacrificial layer over the first hard mask; etching the first sacrificial layer to form first and second sacrificial patterns; forming first and second spacers on either side of the first sacrificial pattern and forming third and fourth spacers on either side of the second sacrificial pattern, with the second and third spacers disposed between the first and second sacrificial patterns; forming a second sacrificial layer over the first to fourth spacers, the first and second sacrificial patterns, and the first hard mask, the second sacrificial layer including a bent portion between the second and third spacers; forming a dummy mask in the bent portion of the second sacrificial layer; etching the first and second sacrificial patterns and the second sacrificial layer using the dummy mask and the first to fourth spacers as an etch barrier layer to form a dummy pattern between the second and third spacers, wherein the dummy pattern comprises the dummy mask and the etched second sacrificial layer on the first hard mask; and etching the first hard mask using the first to fourth spacers and the dummy pattern as an etch barrier layer to form a first hard mask pattern, wherein the first sacrificial layer and the second sacrificial layer are formed of the same material.