Patent ID: 7338911
Filing Date: 2008-03-04
Classification: H01L

Abstract:
1. A method for etching at least including: a process for forming an organic mask having a first opening portion in which a first etching structure is formed and a second opening portion in which a second etching structure provided with a upper etching structure is formed, by patterning an organic film which includes either one of an organic film and a film with the addition of organic solvent and is located on a constituent part to be etched, and a process for forming a transformed organic mask by dissolving the organic mask in contact with organic solvent and reflowing, wherein a part of the organic mask runs and sags along a side wall of the first etching structure in a way that the organic mask fills the side wall and at least a bottom of the first etching structure while leaving a portion unfilled in the upper etching structure.