Ring oscillator fabricated completely by means of mass-printing technologies

Huebler, A.C.; Doetz, F.; Kempa, H.; Katz, Howard E.; Bartzsch, M.; Brandt, N.; Hennig, Ingolf; Fuegmann, U.; Vaidyanathan, Subramanian; Granstrom, Jimmy; Liu, S.; Sydorenko, A.; Zillger, Tino; Schmidt, G.; Preissler, K.; Reichmanis, Elsa; Eckerle, P.; Richter, F.; Fischer, Tobias; Hahn, Ulrich

doi:10.1016/j.orgel.2007.02.009

Cited by 136 publications

(94 citation statements)

References 28 publications

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“…However, these techniques generally require extra steps to align the electrodes and the OSC layer, which can increase fabrication cost and reduce device yield. Inkjet printing (59)(60)(61)(62)(63) and roll-to-roll printing (27,(64)(65)(66) are the two most commonly used methods to fabricate organic circuits and have the greatest potential for enabling large-area, low-cost organic electronics. These techniques, however, suffer from registration inaccuracies requiring large features and specially designed layouts and processes (27,64,66).…”

Section: Discussionmentioning

confidence: 99%

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

Park

Giri

Shaw

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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The electronic properties of solution-processable small-molecule organic semiconductors (OSCs) have rapidly improved in recent years, rendering them highly promising for various low-cost largearea electronic applications. However, practical applications of organic electronics require patterned and precisely registered OSC films within the transistor channel region with uniform electrical properties over a large area, a task that remains a significant challenge. Here, we present a technique termed "controlled OSC nucleation and extension for circuits" (CONNECT), which uses differential surface energy and solution shearing to simultaneously generate patterned and precisely registered OSC thin films within the channel region and with aligned crystalline domains, resulting in low device-to-device variability. We have fabricated transistor density as high as 840 dpi, with a yield of 99%. We have successfully built various logic gates and a 2-bit halfadder circuit, demonstrating the practical applicability of our technique for large-scale circuit fabrication.organic semiconductors | patterning | small molecules | transistors | circuits

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Section: Discussionmentioning

confidence: 99%

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

Park

Giri

Shaw

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…Figure 11 (top) illustrates the processing methods used as well as the final device. The first integrated circuit fabricated completely by means of mass-printing technologies was reported by Huebler et al 62 The seven-stage ring oscillator contains organic field effect transistors in a top gate architecture with PEDOT:PSS source/electrodes prepared by offset lithographic printing. Gravure printing was used for the poly (9,9-dioctyl-fluorene-co-bithiophene) (F8T2) semiconductor layer and the first butadiene-styrene-copolymer low-k dielectric layer.…”

Section: Thin Film Transistorsmentioning

confidence: 99%

Roll‐to‐Roll fabrication of large area functional organic materials

Søndergaard

Hösel

Krebs

2012

J Polym Sci B Polym Phys

947

743

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With the prospect of extremely fast manufacture of very low cost devices, organic electronics prepared by thin film processing techniques that are compatible with roll-toroll (R2R) methods are presently receiving an increasing interest. Several technologies using organic thin films are at the point, where transfer from the laboratory to a more production-oriented environment is within reach. In this review, we aim at giving an overview of some of the R2R-compatible techniques that can be used in such a transfer, as well the current status of R2R application within some of the existing research fields such as organic photovoltaics, organic thin film transistors, light-emitting diodes, polymer electrolyte membrane fuel cells, and electrochromic devices.

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“…3 a and b has a parasitic capacitance of only 6 pF. With a carrier mobility of 0.3 cm 2 /Vs, this translates into a cutoff frequency above 2 MHz-about five orders of magnitude faster than the best result reported to date for printed organic circuits (35).…”

Section: Resultsmentioning

confidence: 91%

Organic transistors manufactured using inkjet technology with subfemtoliter accuracy

Sekitani

Noguchi

Zschieschang

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

389

273

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A major obstacle to the development of organic transistors for large-area sensor, display, and circuit applications is the fundamental compromise between manufacturing efficiency, transistor performance, and power consumption. In the past, improving the manufacturing efficiency through the use of printing techniques has inevitably resulted in significantly lower performance and increased power consumption, while attempts to improve performance or reduce power have led to higher process temperatures and increased manufacturing cost. Here, we lift this fundamental limitation by demonstrating subfemtoliter inkjet printing to define metal contacts with single-micrometer resolution on the surface of high-mobility organic semiconductors to create high-performance p-channel and n-channel transistors and low-power complementary circuits. The transistors employ an ultrathin low-temperature gate dielectric based on a self-assembled monolayer that allows transistors and circuits on rigid and flexible substrates to operate with very low voltages.inkjet printing ͉ organic electronics ͉ self-assembled monolayer T o realize a sustainable society, it is imperative that industrial manufacturing processes undergo a transformation with minimal impact on the environment. From this viewpoint, emerging printable electronics technology (1-6) has attracted considerable attention because it has the potential to drastically reduce ecological footprints and the energy consumed in manufacturing. Moreover, this technology is expected to reduce the material wastage that results from the use of a particular quantity of ink at a certain location.In particular, digital fabrication that employs inkjet technology is expected to play an important role in industrial manufacturing processes because this technique can be applied for patterning high-purity electrically functional materials without preparing original patterning masks (7,8). This application would consequently lead to a reduction in manufacturing costs and/or turnaround time. Inkjet technology has recently proliferated into the area of mass production of color filters for liquid crystal displays (9, 10); this further indicates that this would be the right time for the emergence of printed electronics.However, there still exists a rather wide gap between the resolution required for high-performance electronic devices, such as transistors, and the typical resolution of conventional inkjet printers. For example, microprocessors based on singlecrystal silicon field-effect transistors with a gate length of 32 nm are now in mass production (11), and active-matrix liquidcrystal displays in notebook computers and f lat-screen television sets employ amorphous-silicon thin-film transistors (TFTs) with a channel length of Ϸ2 m. On the other hand, an inkjet print head typically maintains a discharge volume on the order of several picoliters, which creates dots with a minimum diameter of Ϸ30 -50 m on regular paper. The minimum size of a droplet ejected from an inkjet head determines the printing res...

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Ring oscillator fabricated completely by means of mass-printing technologies

Cited by 136 publications

References 28 publications

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

Roll‐to‐Roll fabrication of large area functional organic materials

Organic transistors manufactured using inkjet technology with subfemtoliter accuracy

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