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Selective Transfer of Si Thin-Film Microchips by SiO2 Terraces on Host Chips for Fluidic Self-Assembly

Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto 615-8510, Japan
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Appl. Mech. 2021, 2(1), 16-24; https://doi.org/10.3390/applmech2010002
Received: 27 June 2020 / Revised: 2 February 2021 / Accepted: 5 February 2021 / Published: 8 February 2021
Fluidic self-assembly is a versatile on-chip integration method. In this scheme, a large number of semiconductor microchips are spontaneously deposited onto a host chip. The host chip typically comprises a Si substrate with an array of pockets at the designated microchip placement sites. In this study, we installed an SiO2 layer on the terrace region between the pockets of the host chip, to reduce the attraction with the Si microchips. By the SiO2-topped terrace scheme, we demonstrated a significant enhancement in the deposition selectivity of the Si microchips to the pocket sites, relative to the case of the conventional Si-only host chip. We theoretically explained the deposition selectivity enhancement in terms of the van der Waals interaction. Furthermore, our quantitative analysis implicated a potential applicability of the commonly used interlayer dielectrics, such as HfO2, silsesquioxanes, and allyl ethers, directly as the terrace component. View Full-Text
Keywords: semiconductor; silicon; thin film; layer transfer; self-assembly; integration; device; interface; fluid; liquid semiconductor; silicon; thin film; layer transfer; self-assembly; integration; device; interface; fluid; liquid
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MDPI and ACS Style

Fujita, Y.; Ishihara, S.; Nakashima, Y.; Nishigaya, K.; Tanabe, K. Selective Transfer of Si Thin-Film Microchips by SiO2 Terraces on Host Chips for Fluidic Self-Assembly. Appl. Mech. 2021, 2, 16-24. https://doi.org/10.3390/applmech2010002

AMA Style

Fujita Y, Ishihara S, Nakashima Y, Nishigaya K, Tanabe K. Selective Transfer of Si Thin-Film Microchips by SiO2 Terraces on Host Chips for Fluidic Self-Assembly. Applied Mechanics. 2021; 2(1):16-24. https://doi.org/10.3390/applmech2010002

Chicago/Turabian Style

Fujita, Yutaka, Shoji Ishihara, Yuki Nakashima, Kosuke Nishigaya, and Katsuaki Tanabe. 2021. "Selective Transfer of Si Thin-Film Microchips by SiO2 Terraces on Host Chips for Fluidic Self-Assembly" Applied Mechanics 2, no. 1: 16-24. https://doi.org/10.3390/applmech2010002

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