Patent ID: 7341827

Claim:
A separation-material composition for a photo-resist which is used when a photo-resist mask having a photo-resist pattern is formed on an under-layer, said under-layer is subsequently processed by using said photo-resist mask and said photo-resist mask is removed thereafter, wherein the separation-material composition contains sulfamic acid, ammonium fluoride or ammonium 1-hydrogen difluoride, water, and water-soluble organic solvent, which includes one or more compounds selected from the group consisting of the polyhydric alcohol family and polyhydric alcohol family derivatives, wherein the polyhydric alcohol family and the polyhydric alcohol family derivatives are glycol compounds, wherein the content of sulfamic acid is in a range from 1.0 weight % to 5.0 weight %, the content of ammonium fluoride or ammonium 1-hydrogen difluoride is in a range from 0.01 weight % to 1.0 weight %, the content of water-soluble organic solvent is in a range from 30 weight % to 95 weight %, and water is included for the remainder, and wherein the pH of the separation-material composition is equal to or less than 4.