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- W2018100725 abstract "Along with other Next Generation Lithography (NGL) methods, imprint lithography has been included on the International Roadmap for Semiconductors (ITRS) for the 32 nm node, predicted to be production-ready by 20131. Step and Flash Imprint Lithography (S-FIL) is one of the imprinting technologies being pursued due to its impressive imprinting capabilities, where imprinted features of less than 30 nm have been demonstrated. Unlike optical-based lithography, S-FIL uses techniques similar to that of contact printing, and thereby does not require complex and expensive optics and light sources to create images. Couple this with a reliable pattern transfer, and S-FIL could become a contender as a viable NGL technology. Similar to other imprint lithography systems, S-FIL printed features possess a residual layer several hundred angstroms thick, which requires a breakthrough etch prior to etching a subsequent layer. Of a greater concern, however, is the etch barrier used as the imaging layer for S-FIL. The present silicon content is limited to approximately nine percent, and the formulation is optimized for dispensing and achieving mechanical properties for the imprinting process. As a result, oxygen-based plasmas typically used for pattern transferring more conventional bi-layer structures are not compatible with the current S-FIL resist stack, and therefore pose a challenge from an etch perspective. The development of a recent etch process incorporating an ammonia-based plasma was a key enabler for pattern transfer, and ongoing development is being done to improve critical dimensions (CD). In this study, we examined a lift-off process using S-FIL. The material stacks with and without a glue layer will be discussed, and the challenges from imprinting to etch will be shared. Finally, the lift-off process will be used to demonstrate fabrication of a surface acoustic wave (SAW) device in addition to demonstrating patterning of a non-reactive metallization scheme such as Ti/Au." @default.
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- W2018100725 date "2005-05-06" @default.
- W2018100725 modified "2023-10-14" @default.
- W2018100725 title "Development of an etch-definable lift-off process for use with step and flash imprint lithography" @default.
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