Germer, T.
and Asmail, C.
(1997),
SFRF: Spatial Frequency Response Function Estimation Program, World Wide Web-Internet and Web Information Systems, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=841230
(Accessed April 26, 2024)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
SFRF: Spatial Frequency Response Function Estimation Program
Published
Author(s)
,
Abstract
Measurements of optical scatter are often employed in production line diagnostics for surface roughness of silicon wafers. However, the geometry of the optical scatter instrumentation lacks universal standardization, making it difficult to compare values obtained by instruments made by different manufacturers. The biodirectional reflectance distribution function [BRDF], on the other hand, is a well-defined quantity, and under conditions usually met with bare silicon wafers, can be related to the power spectral density [PSD] of the surface roughness. In a separate paper, we presented an approach for characterizing low level optical scatter instrumentation using a spatial frequency response function. Methods for calculating or measuring the response function were presented. This program implements the methods of that approach to allow manufacturers of instruments that deduce surface microroughness by measuring the level of light scattering to evaluate the spatial frequency response for those instruments.Citation
World Wide Web-Internet and Web Information Systems
Pub Type
Journals
Download Paper
Keywords
haze, optical scatter, silicon wafer, software, surface roughness
Citation
Created November 10, 1997, Updated February 17, 2017