Lavery, K.
, Prabhu, V.
, Lin, E.
, Wu, W.
, Satija, S.
, Choi, K.
and Wormington, M.
(2008),
Lateral Length Scales of Latent Image Roughness as Determined by Off-Specular Neutron Reflectivity, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852777
(Accessed October 9, 2024)
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Lateral Length Scales of Latent Image Roughness as Determined by Off-Specular Neutron Reflectivity
Published
Author(s)
, , , , , Kwang-Woo Choi, M Wormington
Abstract
A combination of specular and off-specular neutron reflectometry was used to measure the buried lateral roughness of the reaction-diffusion front in a model extreme ultraviolet lithography photoresist. Compositional heterogeneity at the latent reaction-diffusion front has been proposed as a major cause of line edge roughness in photolithographic features. This work marks the first experimental observation of the longitudial and lateral compositional heterogeneity of a latent image, revealing the buried lateral length scale as well as the amplitude of inhomogeneity at the reaction-diffusion front. These measurements aid in determining the origins of line edge roughness formation, while exploring the materials limits of the current chemically amplified photoresists.Citation
Applied Physics Letters
Volume
92
Pub Type
Journals
Download Paper
Keywords
diffusion, line edge roughness, neutron reflectivity, off-specular reflectivity, photolithography
Citation
Issues
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Created February 13, 2008, Updated October 12, 2021