Microlens direct-write concept for lithography

Mark P. Davidson

doi:10.1117/12.275797

7 July 1997 Microlens direct-write concept for lithography

Mark P. Davidson

Proceedings Volume 3048, Emerging Lithographic Technologies; (1997) https://doi.org/10.1117/12.275797
Event: Microlithography '97, 1997, Santa Clara, CA, United States

Abstract

There are significant theoretical advantages to using arrays of high resolution microlenses for photolithography. Aberrations can be smaller, fabrication easier, and high numerical apertures more easily attainable than with conventional stepper lenses. Using an array of microlenses, a large exposure field can be printed with uniform quality. Field flatness problems can be greatly reduced because the flatness of the array is not limited by any fundamental principles, and also the array's shape could even follow the contour of the wafer. By exploiting massive parallelism, high throughput can be achieved. Thus it is possible in principle to eliminate photomasks for short turn-around production runs. Light can be modulated by several schemes in a parallel fashion as we show. Options exist to extend the basic technology into the near x-ray region by using micro mirror objectives of the Schwarzchild type. In order to match the throughput of a wafer stepper, we envision approximately 4000 independent channels operating at about 20 megapixels a second each for a total throughput of 80 billion pixels per second. The illumination source should be a cw laser which would minimize damage to optical elements. A suitable laser might be a 266 nm neodymium YAG laser achieved by frequency quadrupling.

Citation Download Citation

Mark P. Davidson "Microlens direct-write concept for lithography", Proc. SPIE 3048, Emerging Lithographic Technologies, (7 July 1997); https://doi.org/10.1117/12.275797

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