Patent ID: 8268183
Filing Date: 2012-09-18
Classification: H01J,H01L

Abstract:
1. A method of processing a solid surface with a gas cluster ion beam comprising: a cluster-protection-layer formation step of forming, on the solid surface, relief structure having protrusions with a cluster protection layer formed to cover an upper part thereof and recesses without the cluster protection layer, wherein the cluster protection layer is formed to have the thickness T [cm] obtained from calculations dependent n [ions/cm where a is a proportionality factor [ions/cm 2 ] between nY 2 [cm 4 /ion] and an area S [cm 2 ] of a region of the cluster protection layer etched by the gas cluster ion beam, in a cross section perpendicular to a direction in which the protrusions or the recesses extend; b is a proportionality factor [ions 1/2 cm −1 ] between Yn 1/2 [cm 2 ·ions −1/2 ] and a length L [cm] of an oblique side of the region of the cluster protection layer etched by the gas cluster ion beam; an irradiation step of emitting the gas cluster ion beam onto the solid surface on which the relief structure has been formed in the cluster-protection-layer formation step; and a removal step of removing the cluster protection layer.