Abstract
The 2-D semiconductors have been recognized as promising channel materials for the ultimately scaled transistor technologies beyond silicon. An essential technology enabler for 2-D semiconductor electronics is the development of dielectric materials interfaced with 2-D semiconductors. In this review article, we overview different types of dielectric materials that are suitable for different application scenarios, including high- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${k}$ </tex-math></inline-formula> gate dielectrics, low- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${k}$ </tex-math></inline-formula> spacers, and thermal management materials under the paradigm of 2-D semiconductor electronics. A material selection guideline for dielectric materials and the key process technology modules are discussed in detail. A special emphasis is made on how each of the dielectric technologies may enable the further scaling and practical applications of 2-D semiconductor transistors. The state-of-the-art device technologies are summarized, and the remaining challenges toward practical applications are discussed from the industrial perspective.
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