Patent ID: 7575992

Claim:
A method of forming a micro pattern in a semiconductor device, comprising: sequentially forming a hard mask film and a first oxide film on a semiconductor substrate and etching the first oxide film to form first oxide film patterns; forming spacers on sidewalls of the first oxide film patterns, forming a second oxide film on the entire structure, and polishing the second oxide film until a predetermined width of each spacer is exposed to form second oxide film patterns; stripping the spacers between the first and second oxide film patterns, and forming a word line space mask pattern on the semiconductor substrate so that a space portion between the first and second oxide film patterns is exposed; removing a portion of a top surface of the first oxide film patterns in the space portion using the word line space mask pattern as an etch mask; performing a dip to control a width of the space between the first and second oxide film patterns after removing the word line space mask pattern; and etching the second oxide film of a peri region to form an oxide film pattern.