Abstract:
In a method of an insulation layer structure, a first photosensitive layer is formed on a substrate. The first photosensitive layer is partially exposed to form a first pattern and a second pattern. The second pattern includes silicon oxide. A second photosensitive layer is formed on the second pattern. The second photosensitive layer is partially exposed to form a third pattern and a fourth pattern. The fourth pattern includes silicon oxide. The first pattern is removed by performing a first developing process. The third pattern is removed by performing a second developing process.