Patent ID: 9074994
Filing Date: 2015-07-07
Classification: G01N

Abstract:
1. A method for inspecting a substrate with a pattern surface for imprint to be transferred to another film, the method comprising: a first alignment step of aligning the substrate in a mini environment chamber by using a substrate alignment device after the substrate has been transferred into the mini environment chamber; a second alignment step of aligning the substrate in a main chamber by using a movable stage and an optical microscope after the substrate has been transferred from the mini environment chamber into the main chamber; an electron beam irradiation step of irradiating the pattern surface of the substrate for imprint disposed on a stage with an electron beam having a predetermined irradiation area, the substrate consisting of a glass substrate made of a single glass material and a transmissive conductive film that transmit light, the glass substrate having the pattern surface of a fine concave-convex configuration pattern, the transmissive conductive film being formed only on a convex part of the fine concave-convex configuration pattern of the glass substrate so as to cover at least a whole surface of the convex part of the concave-convex configuration pattern of the glass substrate; an electron detection step of simultaneously detecting electrons form the pattern surface by the electron beam irradiation by means of a detection surface with a plurality of pixels; and a defect detection step of obtaining an image of the pattern surface based on the electrons detected by the detection surface and detecting a defect of the pattern surface, wherein the electron beam irradiation step includes a first step to irradiate the pattern surface with a first electron beam and a second step to irradiate the pattern surface with a second electron beam with a landing energy less than that of the first electron beam after the first step, wherein a difference between a landing energy of the first electron beam for pre-charge and the landing energy of the second electron beam is 5 to 20 eV, and the landing energy of the first electron beam is 0 to 40 eV, so as to obtain mirror electrons, and wherein a thickness of the transmissive conductive film is smaller than a thickness of the convex part of the concave-convex configuration pattern of the glass substrate.