We present a comprehensive investigation into DSA materials and process development for P24 EUV lithography with the objective of mitigating DSA defects and enhancing the smoothness of DSA-defined patterns. We conduct a comparative assessment of the quality of DSA-rectified patterns between PS-b-PMMA and high Chi BCP. Furthermore, we explore resist planforms other than CAR for creating DSA guiding patterns.
CD variation and more specifically, the line edge roughness (LER), on features now dominates the edge placement error (EPE) and can even exceed the overlay error component of EPE as we scale to more advanced process nodes. A method to accurately differentiate between patterning options is required at these dimensions. The measurements must be accurate and not be influenced by the measurement technique or equipment. EUV lithography and the scaling of the dimensions has brought a greater importance to the effects of linewidth roughness (LWR) in device performance. Lithographers today have to spend considerable amounts of time to measure these irregularities coming from stochastic effects as well as chemical reactions, in order to accurately quantify the patterning effects whilst maintaining cost-effectiveness in manufacturing. In this paper we examine usage of unbiased LWR measurements for EUV direct-print patterning of 32nm, 36nm and 72nm pitch gratings to help instruct the proper choice of materials for photolithography, etch process optimization, illumination source selection as well as improved matching of scanner equipment.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
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.