Patent ID: 7977035

Claim:
A method for manufacturing a fine pattern of a semiconductor device, the method comprising: forming a hard mask pattern having a first pitch and a thickness of t 1 over an underlying layer, the hard mask pattern including a first structure and a second structure, the underlying layer disposed over a semiconductor substrate; forming a light penetrable thin film having a thickness of t 2 over the hard mask pattern and the underlying layer; forming a light absorbable thin film over the light penetrable thin film, the light absorbable thin film having a substantially planar upper surface; performing an exposure process on the light absorbable thin film, the light penetrable thin film, and the hard mask pattern without using an exposure mask, the exposure process involving controlling an amount of exposure energy such that a light reaches to a distance T from a top surface of the underlying layer so as to reach a top surface of the light penetrable thin film disposed over the hard mask pattern and leave a portion of the light absorbable film disposed over a corresponding portion of the light penetrable film unexposed, wherein t 2 <T≦t 1 +t 2 ; thereafter, performing a developing process to form an additional pattern disposed between the first and second structures of the hard mask pattern, the additional pattern including the corresponding portion of the light penetrable thin film and the unexposed portion the light absorbable thin film; and etching the underlying layer using the hard mask pattern and the additional pattern as an etching mask, the underlying layer being provided with an underlying pattern having a second pitch that is less than the first pitch.