Effect of SRAF placement on process window for technology nodes that uses variable etch bias

Ahmed M. Seoud; Tamer M. Tawfik

doi:10.1117/12.829742

23 September 2009 Effect of SRAF placement on process window for technology nodes that uses variable etch bias

Ahmed M. Seoud, Tamer M. Tawfik

Proceedings Volume 7488, Photomask Technology 2009; 74883M (2009) https://doi.org/10.1117/12.829742
Event: SPIE Photomask Technology, 2009, Monterey, California, United States

Abstract

As technology advances to 45 nm node and below, the induced effects of etch process have an increasing contribution to the device critical dimension error budget. Traditionally, original design target shapes are drawn based on the etch target. During mask correction, etch modeling is essential to predict the new resist target that will print on the wafer. This step is known as "Model Based Retargeting" (MBR). During the initial phase of process characterization, the sub-resolution assist features (SRAF) are optimized whether based on the original design target shapes or based on a biased version of the design target (resist target). The goal of the work is to study the different possibilities of SRAF placement to maximize the accuracy and process window immunity of the final resist contour image. We will, statistically, analyze and compare process window simulation results due to various SRAFs placements by changing the reference layer used during placement.

Citation Download Citation

Ahmed M. Seoud and Tamer M. Tawfik "Effect of SRAF placement on process window for technology nodes that uses variable etch bias", Proc. SPIE 7488, Photomask Technology 2009, 74883M (23 September 2009); https://doi.org/10.1117/12.829742

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