Patent ID: 8889560

Claim:
A method of forming fine patterns for a semiconductor device, the method comprising: forming a hard mask layer over an etch target layer; forming a carbon containing layer over the hard mask layer, the forming a carbon containing layer including, forming an organic compound layer on the hard mask layer, performing a first baking process on the organic compound layer for about 90 seconds to about 180 seconds at a first temperature of about 400° C. or less, and performing a second baking process for about 2 hours to about 4 hours at a second temperature of about 700° C. or less, the first baking process being performed for a longer amount of time than the second baking process, and the second temperature being higher than the first temperature; forming carbon containing layer patterns by etching the carbon containing layer; forming spacers over opposing side walls of each of the carbon containing layer patterns; removing the carbon containing layer patterns; forming hard mask patterns by etching the hard mask layer using the spacers as a first etching mask; and etching the etch target layer by using the hard mask patterns as a second etching mask.