Highly stacked 3D organic integrated circuits with via-hole-less multilevel metal interconnects

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Multilevel metal interconnects are crucial for the development of large-scale organic integrated circuits. In particular, three-dimensional integrated circuits require a large number of vertical interconnects between layers. Here, we present a novel multilevel metal interconnect scheme that involves solvent-free patterning of insulator layers to form an interconnecting area that ensures a reliable electrical connection between two metals in different layers. Using a highly reliable interconnect method, the highest stacked organic transistors to date, a three-dimensional organic integrated circuits consisting of 5 transistors and 20 metal layers, is successfully fabricated in a solvent-free manner. All transistors exhibit outstanding device characteristics, including a high on/off current ratio of similar to 10(7), no hysteresis behavior, and excellent device-to-device uniformity. We also demonstrate two vertically-stacked complementary inverter circuits that use transistors on 4 different floors. All circuits show superb inverter characteristics with a 100% output voltage swing and gain up to 35 V per V.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2019-06
Language
English
Article Type
Article
Citation

NATURE COMMUNICATIONS, v.10, no.1, pp.2424

ISSN
2041-1723
DOI
10.1038/s41467-019-10412-9
URI
http://hdl.handle.net/10203/262727
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
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