Patent ID: 8741168
Filing Date: 2014-06-03
Classification: H01L

Abstract:
1. An etching method, comprising: supplying an etching-resistant material to a processing surface including a surface of a silicon nitride film and a surface of a non-etching film, the non-etching film including a material different from the silicon nitride film; and etching the silicon nitride film using an etchant in a state of the etching-resistant material being formed relatively more densely on the surface of the non-etching film than on the surface of the silicon nitride film, wherein the etching-resistant material is an organic monolayers formed as a self-assembled monolayer (SAM) on the surface of the non-etching film, and the etching-resistant material includes a fluorocarbon group, the fluorocarbon group being hot phosphoric acid-resistant and included as a terminal functional group on a side opposite to a functional group chemisorbed to the non-etching film.