Read e-book online EUV Lithography (SPIE Press Monograph Vol. PM178) PDF

By Vivek Bakshi

ISBN-10: 0819469645

ISBN-13: 9780819469649

Severe ultraviolet lithography (EUVL) is the central lithography expertise aiming to fabricate computing device chips past the present 193-nm-based optical lithography, and up to date growth has been made on a number of fronts: EUV mild assets, optics, optics metrology, infection keep watch over, mask and masks dealing with, and resists. This complete quantity is produced from contributions from the world's prime EUVL researchers and gives all the serious info wanted through practitioners and people short of an advent to the sphere. Contents comprise: * The historical past of EUV Lithography * EUV resource know-how (requirements, know-how descriptions, and standing) * EUV optics (projection method layout, multilayer coatings, and substrates) * a variety of EUV wavefront dimension thoughts for optical checking out *Contamination and its keep watch over in EUVL scanners (optics and collector optics illness) * EUV masks and masks metrology (substrates, clean fabrication, absorber stacks and bottom conductive coatings, patterning, cleansing, and part shift mask) * the basics and improvement of EUV withstand know-how, together with LER * The layout and elements of the 1st METs, that have enabled withstand improvement * the basic layout issues for an EUVL scanner and outlines of a full-field scanner's numerous elements * EUVL method patterning functionality * Lithography expense of possession. curiosity in EUVL expertise maintains to extend, and this quantity offers the basis required for figuring out and making use of this intriguing know-how.

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Reprinted from Ref. ) (b) Normal-incidence reflectance of a Mo/Si ML with 40 bilayers measured at the Center for X-Ray Optics (CXRO) and at Physikalisch-Technische Bundesanstalt (PTB). (Reprinted from Ref. ) Depositing a ML film on a curved optical surface produced several practical problems. One was peeling due to the large stress in a ML film deposited on a spherical substrate with a small radius of curvature. Also, the ML was strongly affected by humidity; when it was left in air, exfoliation occurred.

4 Å. (Reprinted from Ref. S. 2 nm sodium laser,” were extremely negative. 3 In 1988, A. Hawryluk and L. Seppala of Lawrence Livermore National Laboratory (LLNL) proposed soft x-ray projection lithography (SXPL) using a two-mirror imaging system at the 32nd International Symposium on Electron, Ion, and Photon Beams (EIPB) in Ft. ”4 The design of their 5× reduction camera, shown in Fig. 5, was based on an inverse Cassegrain. 4 In 1989, A. Hawryluk, N. Ceglio, and D. 5 X-ray reduction camera with corrected field curvature and uniform illumination developed by LLNL.

18 Schematic diagram of the NMOS process used to fabricate the first semiconductor devices using EUVL. Legend: Al = aluminum; LTO = low-temperature oxide; FOX = field oxide. (Reprinted from Ref. 1-μm NMOS transistor with EUVL gate level patterning (3-μm gate width). (Reprinted from Ref. 1-μm long and 3-μm wide gate. 55 V, the transconductance 18 Chapter 1 was 200 mS/mm, the saturated drain current was 400 μA, and the subthreshold swing was 90 mV/decade. S. Department of Energy lasted for approximately three years, and when it ended most of the early EUVL research work in the United States also ended.

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EUV Lithography (SPIE Press Monograph Vol. PM178) by Vivek Bakshi


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