Patent ID: 7674708

Claim:
A method for forming a pattern of a semiconductor device, the method comprising: forming a first photoresist pattern over an underlying layer formed over a semiconductor substrate, wherein the first photoresist pattern comprises lines with spaces defined between the lines; depositing an amorphous carbon film over the first photoresist pattern and the underlying layer that is exposed between the line-type patterns of the first photoresist pattern, wherein the thickness of the amorphous carbon film is substantially uniform; depositing a second photoresist film over the amorphous carbon film, wherein the second photoresist film fills the spaces defined between the lines of the first photoresist pattern; planarizing the second photoresist film and the amorphous carbon film until the first photoresist pattern is exposed, so as to form the amorphous carbon film including a thick portion between the exposed first photoresist pattern and the second photoresist film and a thin portion between the underlying layer and the second photoresist film; removing the first photoresist pattern and the second photoresist film; etching the thin portion of the amorphous carbon film and the underlying layer using the thick portion of the amorphous carbon film as an etch mask; and removing the thick portion of the amorphous carbon film to expose a fine pattern of the underlying layer.