Patent ID: 9146193
Filing Date: 2015-09-29
Classification: G01B,G01N,G06F

Abstract:
1. A scatterometry metrology method, comprising: forming a scatterometry target relative to an elevationally outermost surface of a substrate, the scatterometry target comprising features having an optical property different from that of spaces between the features, the substrate comprising spaced-apart parallel elongated blocking lines having an optical property different from that of spaces between the blocking lines, the blocking lines being elevationally inward of the target features, the target features and the blocking lines overlapping within a same vertical region of the substrate; impinging polarized electromagnetic radiation having multiple wavelengths onto the scatterometry target, pitch of the blocking lines being less than the smallest wavelength of the impinged radiation, the blocking lines reducing spectrum variation to below a detectable level for any polarized electromagnetic radiation passing to elevationally inward of the blocking lines; and detecting electromagnetic radiation that is reflected from the scatterometry target from the impinging and determining therefrom a property associated with the target features and/or spaces between the target features.