Publications

Publications

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Gautam Gunjala; Antoine Wojdyla; Stuart Sherwin; Aamod Shanker; Markus P. Benk; Kenneth A. Goldberg; Patrick P. Naulleau; Laura Waller

Extreme ultraviolet microscope characterization using photomask surface roughness Journal Article

In: Scientific Reports, vol. 10, no. 1, pp. 11673, 2020.

Links | BibTeX | Tags: aberrations, EUV, high-resolution, self-calibration

Stuart Sherwin; Isvar Cordova; Ryan Miyakawa; Laura Waller; Andrew Neureuther; Patrick Naulleau

Quantitative phase retrieval for EUV photomasks Proceedings Article

In: Felix, Nelson M; Lio, Anna (Ed.): Extreme Ultraviolet (EUV) Lithography XI, pp. 234 – 243, International Society for Optics and Photonics SPIE, 2020.

Links | BibTeX | Tags: algorithms, EUV, phase imaging

Stuart Sherwin; Isvar Cordova; Laura Waller; Andrew R Neureuther; Patrick P Naulleau

Measuring the Phase of EUV Photomasks Proceedings Article

In: International Conference on Extreme Ultraviolet Lithography 2019, pp. 111471F, International Society for Optics and Photonics 2019.

Links | BibTeX | Tags: absorber, EUV, multilayer, phase-imaging

Stuart Sherwin; Laura Waller; Andrew R Neureuther; Patrick P Naulleau

Advanced multilayer mirror design to mitigate EUV shadowing Proceedings Article

In: Extreme Ultraviolet (EUV) Lithography X, pp. 1095715, International Society for Optics and Photonics 2019.

Links | BibTeX | Tags: aperiodic Mmultilayer mirror, EUV, EUV mask imaging, experimental design, multilayer, pyTorch

Aamod Shanker; Antoine Wojdyla; Laura Waller; Andrew R. Neureuther

Differential methods in phase imaging for optical lithography PhD Thesis

PhD thesis, University of California, Berkeley (May 2018), 2018.

Links | BibTeX | Tags: EUV, lithography, phase from defocus, phase imaging, TIE

Stuart Sherwin; Andrew Neureuther; Patrick Naulleau

EUV mask characterization with actinic scatterometry Proceedings Article

In: Ronse, Kurt G; Hendrickx, Eric; Naulleau, Patrick P; Gargini, Paolo A; Itani, Toshiro (Ed.): International Conference on Extreme Ultraviolet Lithography 2018, pp. 122 – 135, International Society for Optics and Photonics SPIE, 2018.

Links | BibTeX | Tags: EUV, learning-based, lithography, Reflectometry, Scatterometry

Gautam Gunjala; Antoine Wojdyla; Aamod Shanker; Stuart Sherwin; Markus P Benk; Kenneth A Goldberg; Patrick P Naulleau; Laura Waller

Field-varying aberration recovery in EUV microscopy using mask roughness Proceedings Article

In: Computational Optical Sensing and Imaging, pp. CW2E–2, Optical Society of America 2018.

Links | BibTeX | Tags: aberrations, EUV, speckle, statistical optics

Aamod Shanker; Laura Waller; Gautam Gunjala; Antoine Wojdyla; Dmitriy Voronov; Patrick P Naulleau

Speckle metrology for extreme ultra-violet lithography Proceedings Article

In: Extreme Ultraviolet (EUV) Lithography IX, pp. 105830T, International Society for Optics and Photonics 2018.

Links | BibTeX | Tags: aberrations, EUV, speckle, statistical optics

Stuart Sherwin; Andrew Neureuther; Patrick Naulleau

Actinic EUV scatterometry for parametric mask quantification Proceedings Article

In: Goldberg, Kenneth A (Ed.): Extreme Ultraviolet (EUV) Lithography IX, pp. 323 – 334, International Society for Optics and Photonics SPIE, 2018.

Links | BibTeX | Tags: EUV, lithography, multiple-scattering, phase imaging, Reflectometry, Scatterometry

Stuart Sherwin; Andrew Neureuther; Patrick Naulleau

Modeling high-efficiency extreme ultraviolet etched multilayer phase-shift masks Journal Article

In: Journal of Micro/Nanolithography, MEMS, and MOEMS, vol. 16, no. 4, pp. 1 – 15, 2017.

Links | BibTeX | Tags: EUV, experimental design, lithography, optical models

Stuart Sherwin; Thomas V Pistor; Andrew Neureuther; Patrick Naulleau

Rigorous 3D electromagnetic simulation of ultrahigh efficiency EUV contact-hole printing with chromeless phase shift mask Proceedings Article

In: Panning, Eric M (Ed.): Extreme Ultraviolet (EUV) Lithography VIII, pp. 232 – 240, International Society for Optics and Photonics SPIE, 2017.

Links | BibTeX | Tags: EUV, lithography, optical models

Aamod Shanker; Antoine Wojdyla; Gautam Gunjala; Jonathan Dong; Markus P Benk; Andrew R Neureuther; Kenneth A Goldberg; Laura Waller

Off-axis aberration estimation in an EUV microscope using natural speckle Proceedings Article

In: Imaging Systems and Applications, pp. ITh1F–2, Optical Society of America 2016.

Links | BibTeX | Tags: aberrations, EUV, speckle

Rene A Claus

Partially Coherent Quantitative Phase Retrieval with Applications to Extreme Ultraviolet Lithography PhD Thesis

University of California, Berkeley, 2015, ISBN: 978-1-339-59311-1.

Links | BibTeX | Tags: EUV, lithography, partial coherence, phase imaging

Rene A Claus; Patrick P Naulleau; Andrew R Neureuther; Laura Waller

Quantitative phase retrieval with arbitrary pupil and illumination Journal Article

In: Optics express, vol. 23, no. 20, pp. 26672–26682, 2015.

Links | BibTeX | Tags: algorithms, EUV, phase imaging

Aamod Shanker; Lei Tian; Martin Sczyrba; Brid Connolly; Andrew R Neureuther; Laura Waller

Transport of intensity phase imaging in the presence of curl effects induced by strongly absorbing photomasks Journal Article

In: Applied optics, vol. 53, no. 34, pp. J1–J6, 2014.

Links | BibTeX | Tags: algorithms, EUV, physics-based, TIE

Rene A Claus; Andrew R Neureuther; Patrick P Naulleau; Laura Waller

Effect of amplitude roughness on EUV mask specifications Proceedings Article

In: Photomask Technology 2014, pp. 92351A, International Society for Optics and Photonics 2014.

Links | BibTeX | Tags: EUV, optical models

Aamod Shanker; Laura Waller; Andrew R Neureuther

Defocus based phase imaging for quantifying electromagnetic edge effects in photomasks Masters Thesis

Master’s thesis, University of California, Berkeley (May 2014), 2014.

Links | BibTeX | Tags: algorithms, EUV, phase imaging, TIE

Rene A Claus; Andrew R Neureuther; Laura Waller; Patrick P Naulleau

Predicting LER PSD caused by mask roughness using a mathematical model Proceedings Article

In: Extreme Ultraviolet (EUV) Lithography V, pp. 90482X, International Society for Optics and Photonics 2014.

Links | BibTeX | Tags: EUV, optical models

Aamod Shanker; Martin Sczyrba; Brid Connolly; Andrew R Neureuther; Laura Waller

Analysis of edge effects in attenuating phase-shift masks using quantitative phase imaging Proceedings Article

In: Photomask Technology 2013, pp. 88802A, International Society for Optics and Photonics 2013.

Links | BibTeX | Tags: EUV, phase imaging, TIE