The authors, demonstrated that 4.5-nm -half-pitch structures could be achieved using electron-beam lithography, followed by salty development. They also hypothesized a development mechanism for hydrogen silsesquioxane, wherein screening of the resist surface charge is crucial in achieving a high initial development rate, which might be a more accurate assessment of developer performance than developer contrast. Finally, they showed that with a high-development-rate process, a short duration development of 15 s was sufficient to resolve high-resolution structures in 15-nm-thick resist, while a longer development degraded the quality of the structures with no improvement in the resolution.
|Original language||English (US)|
|Number of pages||6|
|Journal||Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures|
|State||Published - 2009|
Bibliographical noteFunding Information:
The authors thank Henry I. Smith, James M. Daley, and Mark K. Mondol for helpful discussions. Patterning was done at MIT’s shared scanning-electron-beam-lithography facility in the Research Laboratory of Electronics. One of the authors (J.K.W.Y.) would like to acknowledge his fellowship from A * STAR Singapore. This work was funded in part by Alfaisal University and King Abdulaziz City for Science and Technology. The work at Seoul National University was supported by the Frontier Research Program of Tera-Level Nanodevices (TND) funded by the Korean Ministry of Science and Technology (MOST).