Coalescence and Line Formation

Hsiao, Wen‐Kai; Betton, Eleanor S.

doi:10.1002/9783527684724.ch9

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…In the line parameter optimization process, the horizontal lines were printed with varying DS ( DS x ) ranging from 10 to 300 μm at each T p of 30, 40, 50, 55, and 60 °C (Figure a). Bulging instability was observed when DS x was 10 μm at each temperature . Instability occurred when the drop separation was close enough to generate an axial flow within the printed bead, which dominated over the capillary-driven spreading .…”

Section: Resultsmentioning

confidence: 99%

“…What distinguishes this work from the above previous studies is that the pattern optimization is based on the theoretical understandings of the ink rheology and IJP process. While the previous studies took the low yield (maximally 81%) of their printed patterns as an inevitable process outcome, this work inherits the spirit of decades of research into “reliable IJP” and “inkjet-printed bead formation”. ,,− This study uses their IJP theories on jetting, impact, spreading, coalescence, and drying for practical use. This leads to the unique L2B conversion of a line-based EDA drawing for 100% yield.…”

Section: Related Workmentioning

confidence: 99%

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Layout-to-Bitmap Conversion and Design Rules for Inkjet-Printed Large-Scale Integrated Circuits

et al. 2021

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Digital inkjet printing (IJP) can greatly reduce the manufacturing cost and waste of flexible large-area electronics by adding micro-fine patterns onto plastic foils. Advanced system design using IJP has been limited by the lack of an electronic design automation (EDA) approach. An EDA approach based on a vector-based layout drawing requires parameterized IJP design rules. This study proposes a layout-to-bitmap (L2B) conversion procedure and line-based design rules that leverage the existing circuit layout EDA tools for advanced IJP designs. The L2B conversion is accomplished by optimizing the parameters of the horizontal and vertical lines by varying the drop spacings and platen temperatures. Next, the line-based layouts are converted to bitmap files which are used as IJP input data for printing multiple metal layers. This study systematically investigated the development of an IJP process employing Ag nanoparticles. The physical characteristics of the proposed process were evaluated based on theories concerning inkjet-printed bead formation. The design rules for fabricating printed thin-film transistor (TFT) circuits were documented. Documentation is the first step in creating an IJP process design kit for advanced electronics design. Using the optimized L2B conversion procedure and the design rules, a 10 × 10 array of printed organic TFTs was fabricated to demonstrate the reliability of the developed process. Additionally, the fabricated printed organic TFTs indicated that the proposed process could be extended to large-scale system designs.

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Section: Resultsmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Layout-to-Bitmap Conversion and Design Rules for Inkjet-Printed Large-Scale Integrated Circuits

et al. 2021

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“…If the lateral separation between the precursor droplets is large enough, then the impacting droplet can land on the substrate before spreading into the sessile droplet to induce coalescence, a situation which may arise when depositing lines or otherwise patterning a substrate [53]. Figure 2c presents an experiment with such a lateral separation.…”

Section: Droplets With Equal Fluid Properties a Lateral Separationmentioning

confidence: 99%

Surface jets and internal mixing during the coalescence of impacting and sessile droplets

Sykes

Castrejón‐Pita

et al. 2020

Phys. Rev. Fluids

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The internal dynamics during the coalescence of a sessile droplet and a subsequently deposited impacting droplet, with either identical or distinct surface tension, is studied experimentally in the regime where surface tension is dominant. Two color high-speed cameras are used to capture the rapid internal flows and associated mixing from both side and bottom views simultaneously by adding an inert dye to the impacting droplet. Given sufficient lateral separation between droplets of identical surface tension, a robust surface jet is identified on top of the coalesced droplet. Image processing shows this jet is the result of a surface flow caused by the impact inertia and an immobile contact line. By introducing surface tension differences between the coalescing droplets, the surface jet can be either enhanced or suppressed via a Marangoni flow. The influence of the initial droplet configuration and relative surface tension on the long-term dynamics and mixing efficiency, plus the implications for emerging applications such as reactive inkjet printing, are also considered. * mm13tcs@leeds.ac.uk † M.Wilson@leeds.ac.uk

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A System Approach to Develop New Platforms of Industrial Inkjet Inks

Bale

2017

Handbook of Industrial Inkjet Printing

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Coalescence and Line Formation

Cited by 5 publications

References 26 publications

Layout-to-Bitmap Conversion and Design Rules for Inkjet-Printed Large-Scale Integrated Circuits

Layout-to-Bitmap Conversion and Design Rules for Inkjet-Printed Large-Scale Integrated Circuits

Surface jets and internal mixing during the coalescence of impacting and sessile droplets

A System Approach to Develop New Platforms of Industrial Inkjet Inks

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