Uniform Aerosol Jet printed polymer lines with 30μm width for 140ppi resolution RGB organic light emitting diodes

Tait, Jeffrey G.; Witkowska, Ewelina; Hirade, Masaya; Ke, Tung Huei; Malinowski, Paweł E.; Steudel, Soeren; Adachi, Chihaya; Heremans, Paul

doi:10.1016/j.orgel.2015.03.034

Cited by 80 publications

(55 citation statements)

References 37 publications

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“…In another paper, Binder et al provided an analytical model to explain the first part of the observation of Salary et al paper, where there is this reduction in the line width with an increase in the ShGF − however, unlike Salary et al paper, this study did not explicitly account for the particle motion. Other relevant studies that have probed the phenomenon of OS (in the context of the AJP process) and devised strategies to reduce it include the studies by Mahajan et al, Seifert et al, Tait et al, Grunwald et al, Folger et al, etc.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Droplet Sizes on Overspray in Aerosol‐Jet Printing

Guang¹,

Gu²,

Tsang

et al. 2018

Adv Eng Mater

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One of the most important concerns of aerosol-jet based printing (AJP) is the substantial amount of overspray (OS) that can accompany printed traces. In this study, the authors develop a full, three-dimensional (3-D) computational fluid dynamics (CFD) model of the aerosol carrier gas flow (CGF), that is, confined by an annular sheath gas flow (ShGF) during the AJP process. The authors then use this model to pinpoint the fundamental fluid mechanics principles that control the OS in a standard AJP process as a function of the droplet size distribution and the ShGF rate. In their model, the authors consider the trajectories of various sized, monodisperse droplets in an inkstream in order to unravel the manner in which the OS is dictated by the intricate interplay between drop size and both gas flow (CGF and ShGF) rates. Their results explain several experimental results, namely 1) that there is an abundance of smaller sized drops in the OS region at low ShGF rates; 2) that the OS first reduces and then increases as the ShGF rate increases; and 3) that there is no longer a prevalence of smaller particles in the OS region at larger ShGF rates. The authors also discuss the hitherto unaddressed issues related to how 1) the large impact velocity of the ink droplets at the substrate surface (and the resultant Weber number) and 2) the misalignment between the CGF and the cylindrical axis of the ShGF annulus appear to affect OS. The authors anticipate that their analysis will provide an important understanding in the optimization of operating parameters for AJP with respect to OS that can result in an overall improvement in printing resolution.

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Section: Introductionmentioning

confidence: 99%

The Effect of Droplet Sizes on Overspray in Aerosol‐Jet Printing

Guang¹,

Gu²,

Tsang

et al. 2018

Adv Eng Mater

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“…AJP emerged from DARPAÕs Mesoscale Integrated Conformal Electronics program that aimed to develop technologies capable of printing circuitry on almost any surface. The capabilities of AJP printing have been widely documented for printed electronics through the production of conformal antenna [15]; interconnects [14]; and even electrical componentry, such as OLEDs [16] and transistors [17]. Colloids, solutions and multi-part materials with viscosities ranging from 1-1000cp have been proven to be compatible with the AJP process, which has made it a major driver behind printed electronics research.…”

Section: Ii! Aerosol Jet Printingmentioning

confidence: 99%

Aerosol Jet Printing for the Manufacture of Soft Robotic Devices

Wilkinson

Lukic-Mann

Shuttleworth

et al. 2019

2019 2nd IEEE International Conference on Soft Robotics (RoboSoft)

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Soft robotics is a fast growing field of engineering where there are significant opportunities to realize new forms of actuation and sensing. However, there is also a challenge to translate some of the lab-based developments into a robust industrial manufacturing process. Linked to this is also the opportunity to create new forms of functionality in soft robotic devices by employing a flexible, digital manufacturing process for their creation. Overcoming these hurdles, and unlocking the possibilities for greater functionality, is likely to be a key enabler for wider applications and adoption of soft robotics in practical applications. We present a system of computer-controlled Aerosol Jet Printing that will enable complex soft robotic structures to be manufactured. The process is demonstrated through the deposition of a carbon-based conductive ink on to elastomeric substrates for high resolution, conformal and multilayer patterning. Functional demonstrators, in the form of a dielectric elastomer actuator and strain sensor, are produced to showcase the potential of the technique. *

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“…Among those of the applications, there have been many researches to study fabrication of flexible OLEDs using printing technologies such as inkjet printing [6], aerosol jet [7], screen printing [8], electrohydrodynamic jet [9] and nozzle jet printing [10]. Nozzle jet printing is a continuous jetting technique that utilizes constant air pressure with flow pump.…”

Section: Objective and Backgroundmentioning

confidence: 99%