Simulation of EUV multilayer mirror buried defects

Matthew J. Brukman; Yunfei Deng; Andrew R. Neureuther

doi:10.1117/12.390121

21 July 2000 Simulation of EUV multilayer mirror buried defects

Matthew J. Brukman, Yunfei Deng, Andrew R. Neureuther

Proceedings Volume 3997, Emerging Lithographic Technologies IV; (2000) https://doi.org/10.1117/12.390121
Event: Microlithography 2000, 2000, Santa Clara, CA, United States

Abstract

A new interface has been created to link existing deposition/etching and electromagnetic simulation software, allowing the user to program deposition and etching conditions and then find the reflective properties of the resultant structure. The application studied in this paper is the problem of three-dimensional defects which become buried during fabrication of multilayer mirrors for extreme ultraviolet lithography. The software link reads in surface information in the form of linked triangles, determines all nodes within the triangles, and then creates nodes lying between triangles of different layers to create a 3- dimensional inhomogeneous matrix containing the materials' indices of refraction. This allows etching and depositions to be input into SAMPLE-3D, a multi-surface topology to be generated, and then the electromagnetic properties of the structure to be assessed with TEMPEST. This capability was used to study substrate defects in multilayer mirrors by programming a defect and then sputter-depositing some forty layers on top of the defect. Specifically examined was how the topography depended on sputter conditions and determined the defects' impact on the mirrors' imaging properties. While this research was focused on application to EUV lithography, the general technique may be extended to other optical processes such as alignment and mask defects.

Citation Download Citation

Matthew J. Brukman, Yunfei Deng, and Andrew R. Neureuther "Simulation of EUV multilayer mirror buried defects", Proc. SPIE 3997, Emerging Lithographic Technologies IV, (21 July 2000); https://doi.org/10.1117/12.390121

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available