Patent ID: 9127934
Filing Date: 2015-09-08
Classification: G01B,G03F,H01L

Abstract:
1. A space imaging overlay inspection method, comprising: forming a thin film having a space imaging overlay mark by photolithography; the thin film being a transparent thin film, performing a color developing treatment on the space imaging overlay mark on the transparent thin film, so as to make the space imaging overlay mark appear in a non-transparent color, by ejecting gas to a region where the space imaging overlay mark on the transparent thin film is located in an environment subject to a vacuum treatment, wherein the gas is capable of conducting a haze reaction with the space imaging overlay mark, so that the space imaging overlay mark subject to the haze reaction appears in the non-transparent color; and conducting a space imaging overlay inspection between the transparent thin film and an adjacent thin film by using the space imaging overlay mark appearing in the non-transparent color.