Patent ID: 8598036
Filing Date: 2013-12-03
Classification: G03F,H01L

Abstract:
1. A method for manufacturing a semiconductor device, the method comprising: forming a conductive layer on a substrate; forming a hard mask layer on the conductive layer; changing a profile of an upper surface of the hard mask layer so that a first level area and a second level area having different distances from the substrate are formed on an upper surface of the hard mask layer; forming a photoresist film having a first area covering the first level area of the hard mask layer and a second area covering the second level area of the hard mask layer on the hard mask layer; light-exposing the photoresist film under a light exposure condition, in which an optimal focused electron beam is eradiated on the first area and a defocused electron beam is eradiated on the second area, by using a photo mask having a light exposure pattern for simultaneously light-exposing the first area and the second area with the same width; forming a plurality of photoresist patterns continuously extending over the first level area and the second level area of the hard mask layer with different widths on the first level area and the second level area by developing the light-exposed photoresist film; forming a plurality of hard mask patterns having different widths on the first level area and the second level area by etching the hard mask layer using the plurality of photoresist patterns as an etching mask; and forming a plurality of conductive patterns having a variable width in a length direction by etching the conductive layer using the plurality of hard mask patterns as an etching mask.