Evolution and Operating Experiences with Different Drop‐On‐Demand Systems

Burgold, Jörg; Weise, Frank; Fischer, M.; Schlingloff, Gregor; Henkel, Thomas; Albert, Jens; Mayer, Günther; Schober, Andreas

doi:10.1002/marc.200400514

Cited by 14 publications

(10 citation statements)

References 16 publications

(6 reference statements)

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“…Ink rheological properties such as viscosity and surface tension are critical parameters 7a, 14. Cavitation bubbles,7b undesired satellite drops,7b, 13 first drop problem,13, 14 nozzle clogging,7a, 7b, 11, 13, 14 droplets instabilities,7a, 13 agglomeration, precipitation or deposition of solutes7a are some of the problems that may need to be addressed for each particular ink‐print head combination.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric Ink‐Jet Printing of Horseradish Peroxidase: Effect of Ink Viscosity Modifiers on Activity

Risio

Yan

2007

Macromol. Rapid Commun.

118

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In this study a bioink containing the horseradish peroxidase (HRP) enzyme was formulated and jetted with a piezoelectric‐based ink‐jet deposition system. A number of polymers with different molecular weights, functional groups and electric charge were tested as viscosity modifiers. The impact of viscosity modifiers on HRP activity was systematically studied. It was found that viscosity modifiers typically used in commercial ink formulations significantly impaired HRP activity possibly due to limitations in diffusion. In contrast, carboxymethyl cellulose increased viscosity to the desired range for piezoelectric jetting without negatively affecting the HRP activity. Good jettability was obtained for the HRP bioink by adding a suitable surfactant, a viscosity modifier and a humectant.magnified image

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Section: Introductionmentioning

confidence: 99%

Piezoelectric Ink‐Jet Printing of Horseradish Peroxidase: Effect of Ink Viscosity Modifiers on Activity

Risio

Yan

2007

Macromol. Rapid Commun.

118

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“…Unlike traditional subtraction manufacture process, microdroplet jetting as an additive fabrication technique of noncontact and data-driven type represents a new development trend of modern manufacturing process [1][2][3][4][5]. It can economically and rapidly deposit a wide variety of materials including metals, ceramics, polymers, electronically and optically functional materials as well as biological materials on different substrate types [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Micro-droplet jetting includes two modes: continuous inkjet (CIJ) and drop-on-demand (DOD) inkjet [1][2][3][4][5]. In CIJ technology, a stream of liquid breaks into droplets via the Plateau-Rayleigh instability.…”

Section: Introductionmentioning

confidence: 99%

Multi-materials drop-on-demand inkjet technology based on pneumatic diaphragm actuator

Xie

Zhang

Shu

et al. 2010

Sci. China Technol. Sci.

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Micro-droplet jetting belongs to the field of precision fluid dispensing techniques. Unlike traditional subtraction manufacture process, micro-droplet jetting as an additive fabrication technique with features of non-contact and data-driven represents a new development trend of modern manufacturing process. In this paper, the design, fabrication and performance of a multimaterials drop-on-demand (DOD) inkjet system based on pneumatic diaphragm actuator were described. For capturing the droplet ejection process and measuring the droplet dimension, a self-made in situ imaging system based on time delayed external trigger was set up. The performance of the generator was studied by adjusting the structure and control parameters. Furthermore, the influence of fluid properties on the droplet ejection process was experimentally investigated. Micro-solderballs of 160.5 µm in diameter and UV curing adhesive micro-bumps of 346.94 µm in contact diameter with the substrate were produced. The results demonstrated that the DOD inkjet generator possesses characteristics of robust, easy to operate and maintain, and able to withstand high temperature as well as applicability to a wide variety of materials including polymers, low melting point resin and high melting point metal. The system has a great potential of being used in the fields of IC and MEMS packaging, 3D printing, organic semiconductor fabrication, and biological and chemical analysis.

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“…Nowadays, many new droplet generator designs are based on siliconbased piezosystems [15], which provide the possibility of integrating many droplet generators into a single device. A comparison of different designs and systems can be found in Burgold et al [16]. Commercial inkjet print heads are commonly used for research applications where small droplets are required.…”

Section: Introductionmentioning

confidence: 99%

Generation of Monodisperse Micron‐Sized Droplets using Free Adjustable Signals

Riefler

Wriedt

2008

Part & Part Syst Charact

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This paper describes the generation of small water droplets in the size range down to a few microns. Commercially available inkjet printing devices are not suitable for producing such droplets since they produce satellite droplets. Furthermore, standard drop-on-demand devices are normally restricted to the generation of droplets with the same size as the orifice diameter. Using a new and more sophisticated computer-based signal generation system, smaller-sized droplets can be generated from the same orifice. A key feature of the design is the generation of freely definable pulses. This enables the generation of acoustic modes within the fluid of the droplet generator, which leads to the generation of droplets without satellites. Only very few pulse forms enable the generation of suitable acoustic modes. Therefore, it is necessary to look for the specific pulse corresponding to the chosen droplet generator. Flexible pulse form generation appears to be more suitable than simple pulse forms for the generation of such droplets.

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Evolution and Operating Experiences with Different Drop‐On‐Demand Systems

Cited by 14 publications

References 16 publications

Piezoelectric Ink‐Jet Printing of Horseradish Peroxidase: Effect of Ink Viscosity Modifiers on Activity

Piezoelectric Ink‐Jet Printing of Horseradish Peroxidase: Effect of Ink Viscosity Modifiers on Activity

Multi-materials drop-on-demand inkjet technology based on pneumatic diaphragm actuator

Generation of Monodisperse Micron‐Sized Droplets using Free Adjustable Signals

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