Investigation of viable approaches to AAPSM intensity imbalance reduction for 65nm lithography

Tejas Jhaveri; Rand Cottle; Yuan Zhang; Christopher Progler

doi:10.1117/12.593219

12 May 2005 Investigation of viable approaches to AAPSM intensity imbalance reduction for 65nm lithography

Tejas Jhaveri, Rand Cottle, Yuan Zhang, Christopher Progler

Proceedings Volume 5754, Optical Microlithography XVIII; (2005) https://doi.org/10.1117/12.593219
Event: Microlithography 2005, 2005, San Jose, California, United States

Abstract

This paper investigates possible solutions to intensity imbalance minimization for 65nm node application through rigorous vector simulations. It provides a strategic plan to select the right technology for AAPSM application. Technologies such as undercut, bias, combination of undercut and bias and use of a Transparent Etch Stop Layer (TESL) are compared. The study looks at the effect of through pitch, defocus, phase error and sidewall profile on space CD bias for the technologies mentioned to determine the set of conditions that would provide the best compromise between performance and manufacturability. Simulations indicate the use of TESL along with undercut would provide best compromise between manufacturability and performance. Simulation results show that performance can be improved considerably by optimizing phase target. The use of vertical side walls is sufficient if the purpose of simulation is to determine trends. For more accurate simulations it is suggested that the profile used in simulation be matched to profiles seen on manufactured AAPSM.

Citation Download Citation

Tejas Jhaveri, Rand Cottle, Yuan Zhang, and Christopher Progler "Investigation of viable approaches to AAPSM intensity imbalance reduction for 65nm lithography", Proc. SPIE 5754, Optical Microlithography XVIII, (12 May 2005); https://doi.org/10.1117/12.593219

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