Patent ID: 9552984
Date: 2017-01-24
CPC Classifications: B41J,H01L

Claim:
1. A processing method of a substrate comprising the steps of: repeating sequentially a plurality of cycles, each cycle including: performing a second protection layer forming step and a second protection layer removing step between a first cycle in which one cycle from the trench forming step through the first protection layer removing step is repeated a plurality of times and a second cycle which is performed subsequently to the first cycle and in which one cycle from the trench forming step through the first protection layer removing step is repeated a plurality of times, in the second protection layer forming step, a second protection layer being formed inside the trench formed in the first cycle, and in the second protection layer removing step, a portion of the second protection layer covering a position at which the trench is further excavated being removed, wherein a trench forming step of forming the trench on the substrate by etching is not performed between the first cycle and the second cycle.