Anamorphic approach for developing hi-efficiency illumination system to inspect defects on semiconductor wafers

Woojun Han; Sunseok Yang; Ohhyung Kwon; Seungyong Chu; Seungchul Oh; Woosung Jung; Jaisoon Kim

doi:10.1117/12.2258162

28 March 2017 Anamorphic approach for developing hi-efficiency illumination system to inspect defects on semiconductor wafers

Woojun Han, Sunseok Yang, Ohhyung Kwon, Seungyong Chu, Seungchul Oh, Woosung Jung, Jaisoon Kim

Author Affiliations +

Proceedings Volume 10145, Metrology, Inspection, and Process Control for Microlithography XXXI; 1014517 (2017) https://doi.org/10.1117/12.2258162
Event: SPIE Advanced Lithography, 2017, San Jose, California, United States

Abstract

General approaches to realize higher sensitivity in optical inspection system are using shorter wavelength including UV and higher NA for objective lens. Extreme performances of imaging and illumination systems in a situation of wellmatched to each other are inevitable for the further effort on an effective optical detection of fine defects in patterned wafer. This study focused on the dark field illumination systems satisfying hi areal uniformity and concentration efficiency for the specific conditions of non-symmetric illumination area and critical slanted angle. Three different types of anamorphic dark field illumination systems namely, Far-field Areal Illumination (FAI), Near-field Areal Illumination (NAI) and Farfield Linear Illumination (FLI), are designed and evaluated by brightness, uniformity and concentration efficiency of beam intensity.

Conference Presentation

Citation Download Citation

Woojun Han, Sunseok Yang, Ohhyung Kwon, Seungyong Chu, Seungchul Oh, Woosung Jung, and Jaisoon Kim "Anamorphic approach for developing hi-efficiency illumination system to inspect defects on semiconductor wafers", Proc. SPIE 10145, Metrology, Inspection, and Process Control for Microlithography XXXI, 1014517 (28 March 2017); https://doi.org/10.1117/12.2258162

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