New g-Line Lens For Next Generation

Ryusho Hirose

doi:10.1117/12.953145

25 July 1989 New g-Line Lens For Next Generation

Ryusho Hirose

Author Affiliations +

Proceedings Volume 1088, Optical/Laser Microlithography II; (1989) https://doi.org/10.1117/12.953145
Event: 1989 Santa Clara Symposium on Microlithography, 1989, San Jose, CA, United States

Abstract

In order to meet the production requirement for higher integration, g-line lenses of higher NA have been developed. It is generally believed that to enlarge both NA and image field is difficult. The maximum image field achieved with a high NA lens has so far been 15 mm square and the maximum NA of a wide image field lens has been 0.35. Canon has recently developed a new g-line lens of higher NA and larger image field. Results of evaluations so far show that the newly developed lens is the best-suited of any yet made for mass-production of 4M DRAMs. This is the 5x reduction lens with a numerical aperture of 0.45 and a field size of 20 mm square (28.2 mm dia.). In this paper, the performance of this lens is discussed, and SEM resist profiles produced by the new lens are shown. The last section gives an overview of progress in development of projection lenses in terms of the amount of information available, and also discusses the possibility of a lens for 16M DRAMs being developed.

Citation Download Citation

Ryusho Hirose "New g-Line Lens For Next Generation", Proc. SPIE 1088, Optical/Laser Microlithography II, (25 July 1989); https://doi.org/10.1117/12.953145

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