Patent ID: 8114685
Filing Date: 2012-02-14
Classification: H01L

Abstract:
1. A method of manufacturing a material to be etched, which manufactures the material to be etched by using an etching mask where a region corresponding to an etched region of an object to be etched is opened and a region corresponding to an un-etched region is not opened and by performing etching through the opened region, wherein the etching includes at least a first etching process and a second etching process performed after the first etching process, the second etching process is a process of etching a region including a region that is not etched by the first etching process, the etching mask used in at least the first and second etching processes is used in both of the etching processes, a positional relationship between the surface of the object to be etched and the etching mask is relatively changed after the first etching process, and by this change, after the opened region of the etching mask is caused to correspond so as to include the region that is not etched and the region that is etched by the first etching process, the second etching process is performed, the result obtained after completing the first and second etching processes is the same result that would have been achieved if the first and second etching processes were to have been carried out in a one-step etching process using a virtual mask, wherein the virtual mask is a single mask that corresponds to the superposition of two separate masks where one mask is moved relative to the other, and a recess is formed on the surface of the etching mask that covers the object to be etched.