Patent ID: 9564360
Date: 2017-02-07
CPC Classifications: C23C,H01L

Claim:
1. A substrate processing method of a substrate which has a recess portion on a surface and in which a deposition film is formed on an opening portion of the recess portion, the deposition film including an upper deposition film on the surface of the substrate, the upper deposition film including a protruding portion protruding from a side wall portion of the recess portion toward an inside of the recess portion on the opening portion of the recess portion, the substrate processing method comprising: a first irradiation step of irradiating the protruding portion with a particle beam in a direction which forms a first angle with a direction perpendicular to an in-plane direction of the substrate, to remove part of the protruding portion in a thickness direction; and a second irradiation step of, after the first irradiation step, irradiating the protruding portion with the particle beam in a direction which is closer to perpendicular to the in-plane direction of the substrate than is the first angle and which forms a second angle with the direction perpendicular to the in-plane direction of the substrate, to remove part of the protruding portion that remains in the thickness direction.