title: "Sketch and Peel" Lithography for High-Resolution Multiscale Patterning.
abstract: We report a unique lithographic process, termed "Sketch and Peel" lithography (SPL), for fast, clean, and reliable patterning of metallic structures from tens of nanometers to submillimeter scale using direct writing technology. The key idea of SPL process is to define structures using their presketched outlines as the templates for subsequent selective peeling of evaporated metallic layer. With reduced exposure area, SPL process enables significantly improved patterning efficiency up to hundreds of times higher and greatly mitigated proximity effect compared to current direct writing strategy. We demonstrate that multiscale hierarchical metallic structures with arbitrary shapes and minimal feature size of ∼15 nm could be defined with high fidelity using SPL process for potential nanoelectronic and nano-optical applications.
authors.affiliation: School of Physics and Electronics, Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University , Changsha 410082, People's Republic of China.
authors.forename: Yiqin
authors.initials: Y
authors.lastname: Chen
authors.affiliation: School of Physics and Electronics, Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University , Changsha 410082, People's Republic of China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Xiang
authors.affiliation: School of Physics and Electronics, Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University , Changsha 410082, People's Republic of China.
authors.forename: Zhiqin
authors.initials: Z
authors.lastname: Li
authors.affiliation: School of Physics and Electronics, Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University , Changsha 410082, People's Republic of China.
authors.forename: Yasi
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Physics and Electronics, Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University , Changsha 410082, People's Republic of China.
authors.forename: Yuhan
authors.initials: Y
authors.lastname: Meng
authors.affiliation: School of Physics and Electronics, Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University , Changsha 410082, People's Republic of China.
authors.forename: Huigao
authors.initials: H
authors.lastname: Duan
keywords: Multiscale patterning; electron-beam lithography; nanogaps; plasmonics; selective peeling