Y. Chen et al., PROXIMITY X-RAY-LITHOGRAPHY AS A QUICK REPLICATION TECHNIQUE IN NANOFABRICATION - RECENT PROGRESS AND PERSPECTIVES, Microelectronic engineering, 30(1-4), 1996, pp. 191-194
With synchrotron radiation (SuperACO) and a commercial stepper (Karl S
uss XRS200), the proximity x-ray lithography is used for quick replica
tion of high resolution patterns. The physical limits of the resolutio
n are evaluated, taking into account both effects of near-field diffra
ction and photoelectrons. All experimental ingredients are described,
including the achievements in 50nm pattern replication and also in 20n
m linewidth mask fabrication. Data are compared to the theoretical pre
dictions, showing a reasonable agreement under close proximity conditi
ons.