Patent ID: 7595145

Claim:
A method of forming a pattern of a semiconductor device, the method comprising: forming a hard mask layer over a semiconductor substrate including a cell region and a peripheral region; forming a photoresist film pattern over the hard mask layer; converting an outer portion of the photoresist film pattern into an oxide layer having a first vertical wall, a second vertical wall, a horizontal wall, a first peripheral pattern and a second peripheral pattern, wherein an inner portion of the photoresist film pattern is enclosed within the converted oxide layer, the peripheral first pattern is connected to the first vertical wall in the peripheral region, and the second peripheral pattern is connected to the first and second vertical walls in the peripheral region; removing a portion of the first vertical wall between the first peripheral pattern and the second peripheral pattern in the peripheral region; removing at least a portion of the horizontal wall in the cell region and the peripheral region to expose the photoresist film pattern remaining within the converted oxide layer, thereby separating the first peripheral pattern and the second peripheral pattern in the peripheral region and separating the first vertical wall and the second vertical wall in the cell region, wherein the first peripheral pattern of the peripheral region and the first vertical wall of the cell region are connected by a single body, and the second peripheral pattern of the peripheral region and the second vertical wall of the cell region are connected by a single body; removing the exposed photoresist film pattern to form a first oxide pattern corresponding to the first vertical wall and the first peripheral pattern, and to form a second oxide pattern corresponding to the second vertical wall and the second peripheral pattern; patterning the hard mask layer using the first and second oxide patterns as etch masks; and etching the semiconductor substrate using the patterned hard mask layer.