| 摘要 |
PROBLEM TO BE SOLVED: To provide an alkali etchant and an etching method which allow the improvement of a shortcoming that a conventional alkali etchant has.SOLUTION: The alkali etchant is for use in wet etching, and comprises: sodium hydroxide aqueous solution; and sodium hypochlorite dissolved in the sodium hydroxide aqueous solution so as to have a density (vol.%) within a range of a density (vol.%) determined by the following formula ±10%: 0.0087×Density of the sodium hydroxide aqueous solution (mass%)-0.039. |
