Standing wave reduction of positive and negative I-line resists

A. G. Grandpierre; R. Schiwon; F. Finger; U. P. Schroder

doi:10.1117/12.596508

10 May 2005 Standing wave reduction of positive and negative I-line resists

A. G. Grandpierre, R. Schiwon, F. Finger, U. P. Schroder

Proceedings Volume 5752, Metrology, Inspection, and Process Control for Microlithography XIX; (2005) https://doi.org/10.1117/12.596508
Event: Microlithography 2005, 2005, San Jose, California, United States

Abstract

Implantation layers may require smaller resist thickness as chip dimensions decrease. When reducing the thickness below 800 nm, while keeping all other track and exposure settings the same, standing waves in positive and negative I-line resists become more prominent. Bottom antireflective coating helps reducing the amplitude of the waves, but additional efforst, like BARC open RIE steps, or more coater units on the track, will increase the cost of ownership significantly. One may also consider changing the bake settings, which play a critical role in the formation of standing waves. The standard settings used for mid UV resists are 90 deg post apply bake (PAB) and 110 deg post exposure bake (PEB). Although resist suppliers recommend staying within this temperature range, we have used settings outside the range, as part of testing for possible profile ameliorations. Optimized settings for both tones were achieved with a different combination of the two bakes. The overall performances of the tested samples with optimized settings were satisfying in terms of CD range, stability and process window.

Citation Download Citation

A. G. Grandpierre, R. Schiwon, F. Finger, and U. P. Schroder "Standing wave reduction of positive and negative I-line resists", Proc. SPIE 5752, Metrology, Inspection, and Process Control for Microlithography XIX, (10 May 2005); https://doi.org/10.1117/12.596508

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