27 December 2002 Porous silica pellicle frame for deep UV lithography
Author Affiliations +
Proceedings Volume 4889, 22nd Annual BACUS Symposium on Photomask Technology; (2002); doi: 10.1117/12.468604
Event: Photomask Technology 2002, 2002, Monterey, CA, United States
Several significant technical issues are associated with the current anodized aluminum photomask frame. These problems will become more acute as shorter wavelengths such as 193 nm and 157 nm become standard. For example, it is difficult to purge the pellicle space, and the non-porous nature of the aluminum frame can lead to pressure-induced film breakage. In addition, the thermal expansion behavior of aluminum does not match that of the silica substrate, which can lead to pattern distortion or bending of a hard pellicle film. Proposed solutions such as a perforated silica frame or a porous stainless steel frame may address some of these issues, but a complete solution has not been forthcoming. A porous silica frame technology based on sol-gel processing may eliminate concerns associated with the lack of porosity in the stainless steel frame, as well as thermal expansion mismatch problems. Several additional advantages may also be realized, including the removal of organic contaminants from inside the pellicle space, filtration of particulate contaminants, and stability under aggressive cleaning. This approach to a porous silica frame may help enable a cost-effective route to more rapid commercialization of shorter-wavelength microlithographic processes.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. Laurence Meixner, Rahul Ganguli, Troy Robinson, De-Yin Jeng, Mark Morris, S. Ray Chaudhuri, Brian J. Grenon, "Porous silica pellicle frame for deep UV lithography", Proc. SPIE 4889, 22nd Annual BACUS Symposium on Photomask Technology, (27 December 2002); doi: 10.1117/12.468604; https://doi.org/10.1117/12.468604









Porous silica frame for deep UV lithography
Proceedings of SPIE (June 26 2003)
Theoretical study of mask haze formation
Proceedings of SPIE (May 02 2008)
Porous silica pellicle frame
Proceedings of SPIE (December 17 2003)
Sol-gel fabrication of high-quality photomask substrates
Proceedings of SPIE (December 27 2002)
Hard pellicle study for 157-nm lithography
Proceedings of SPIE (August 01 2002)

Back to Top