Patent ID: 8222152
Filing Date: 2012-07-17
Classification: H01L

Abstract:
1. A method for fabricating a hole pattern, comprising: forming a first hard mask layer over an etch target layer; forming a second hard mask pattern over the first hard mask layer, the second hard mask pattern being patterned to be a line type in a first direction and having a selective etch ratio to the first hard mask layer; forming a third hard mask layer over a top surface of the first hard mask layer including the second hard mask pattern to bury a space between adjacent ones of the second hard mask pattern; forming a photoresist pattern over the third hard mask layer, the photoresist pattern being patterned to be a line type in a second direction; etching the third hard mask layer using the photoresist pattern to form a third hard mask pattern; removing the photoresist pattern; and etching the first hard mask layer using the second and third hard mask patterns.