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- W1966833803 abstract "HTPSM (High-Transmission Phase Shift Mask) is one of the most promising mask technologies for photolithography resolution enhancement. However, it s well known that the use of HTPSM frequently results in unwanted patterns due to inevitable pinching effects, particularly in spacious areas. Although pinching effect can be effectively suppressed by the application of additional Cr patterns at the problematic locations, it is a critical challenge to systematically detect and automatically correct the complicated patterns in most of realistic cases. We demonstrated remarkable photolithography process window improvement by the use of HTPSM (A type and above) with the focus on the development of a systematic methodology for automatic detection and correction of abnormal patterns due to optical pinching effect. Regular optical rules check (ORC) with specific modifications was employed to precisely locate the potential pinched areas, whereas enhanced design rules check (DRC) was applied subsequently to generate the required additional Cr patterns for final mask fabrication. A variety of photolithography variables, such as wavelength and numerical aperture (NA) were extensively investigated against optical pinching effect to confirm the feasibility and accuracy of the proposed detection/correction methodology for HTPSM application." @default.
- W1966833803 created "2016-06-24" @default.
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- W1966833803 date "2008-03-14" @default.
- W1966833803 modified "2023-09-26" @default.
- W1966833803 title "Highly reliable detection and correction of pinched areas for high transmission phase shift mask" @default.
- W1966833803 doi "https://doi.org/10.1117/12.772499" @default.
- W1966833803 hasPublicationYear "2008" @default.
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