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John S. Villarrubia

Researcher at National Institute of Standards and Technology

Publications -  95
Citations -  3379

John S. Villarrubia is an academic researcher from National Institute of Standards and Technology. The author has contributed to research in topics: Metrology & Dimensional metrology. The author has an hindex of 26, co-authored 92 publications receiving 3227 citations. Previous affiliations of John S. Villarrubia include IBM.

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Proceedings ArticleDOI

Optimizing hybrid metrology through a consistent multi-tool parameter set and uncertainty model

TL;DR: In this article, the authors applied hybrid metrology to sub-20 nm dense feature sets and showed reduced measurement uncertainties on 15 nm CD features and evaluated approaches to adapt quantitative hybrid metrologies into a high volume manufacturing environment.
Journal ArticleDOI

Three-Dimensional (3D) Nanometrology Based on Scanning Electron Microscope (SEM) Stereophotogrammetry.

TL;DR: Two stereophotogrammetry software packages need further improvement before they can be used reliably with SEM images with uniform zones, and in a sample containing nearly uniform and therefore low-contrast zones, the height reconstruction error was ≈46%.
Journal ArticleDOI

The effect of tip size on the measured Ra of surface roughness specimens with rectangular profiles

TL;DR: In this paper, the stylus tip increases the profile peak width and decreases the measured valley width, which can cause either an increase or a decrease in the apparent roughness average Ra, depending on the tip size and the ratio of peak width to valley width.
Journal ArticleDOI

Advanced metrology needs for nanoelectronics lithography

TL;DR: Knight et al. as discussed by the authors discuss the current state of the art in the metrology for measuring critical dimensions of printed features for scanning electron microscopy and atomic force microscopy, and describe work at the National Institute of Standards and Technology advancing these tools as well as exploratory work on two new promising techniques.
Journal ArticleDOI

Comparison of Electron Imaging Modes for Dimensional Measurements in the Scanning Electron Microscope.

TL;DR: Simulations with JMONSEL, an electron microscope simulator, indicate that the nanometer-scale differences observed on this sample can be explained by the different convolution effects of a beam with finite size on signals with different symmetry.