Defect mitigation and root cause studies in IMEC's 14nm half-pitch chemo-epitaxy DSA flow

Autor: Paul F. Nealey, Dieter Van den Heuvel, Doni Parnell, Nadia Vandenbroeck, Lieve Van Look, Roel Gronheid, Paulina Rincon-Delgadillo, Hari Pathangi, Ryota Harukawa, Venkat Nagaswami, Guanyang Lin, Yi Cao, Ito Chikashi, Lucia D'Urzo, Boon Teik Chan, Jihoon Kim, Kathleen Nafus, Hareen Bayana
Rok vydání: 2015
Předmět:
Zdroj: Alternative Lithographic Technologies VII.
ISSN: 0277-786X
Popis: High defect density in thermodynamics driven DSA flows has been a major cause of concern for a while and several questions have been raised about the relevance of DSA in high volume manufacturing. The major questions raised in this regard are: 1. What is the intrinsic level of DSA-induced defects, 2. Can we isolate the DSA-induced defects from the other processes-induced defects, 3. How much do the DSA materials contribute to the final defectivity and can this be controlled, 4. How can we understand the root causes of the DSA-induced defects, their kinetics of annihilation and finally, 5. Can we have block co-polymer anneal durations that are compatible with standard CMOS fabrication techniques (in the range of minutes) with low defect levels. This manuscript addresses these important questions and identifies the issues and the level of control needed to achieve a stable DSA defect performance.
Databáze: OpenAIRE