The squeegee in printing of electronic circuits

Dubey, G. C.

doi:10.1016/0026-2714(75)90151-1

Cited by 10 publications

(8 citation statements)

References 5 publications

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“…The printing process are done only at the place where required and follow the design pattern which are prepared earlier (Vasudivan & Zhiping, 2010). The printing quality and the fine line printing resolution patterns is necessary in order to achieve high component density and high frequency applications (Dubey, 1975;Kim et al, 2010). Successful transferred pattern onto the substrate depends on the rheology of the paste material.…”

Section: Basic Information/thick-film Materialsmentioning

confidence: 99%

Rheological Behaviors and Their Correlation with Printing Performance of Silver Paste for LTCC Tape

Alias¹,

Shapee²

2012

Rheology

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Section: Basic Information/thick-film Materialsmentioning

confidence: 99%

Rheological Behaviors and Their Correlation with Printing Performance of Silver Paste for LTCC Tape

Alias¹,

Shapee²

2012

Rheology

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“…Although the primary objective was to determine the optimum printing parameters, which result in the maximum deposit of print paste, registration of design could not be ignored as it is an important factor to consider in the context of this study. This is because, a thick ink deposit with poor registration is of limited used in printed electronics applications (Dubey, 1975). Thus, the quality of the print was analysed by scanning the samples at 300 dpi using a typical flatbed scanner.…”

Section: Resultsmentioning

confidence: 99%

“…However, regardless of the type of printing process, its objective (conventional or functional) and the substrate, determination of the optimum process parameters is imperative to achieve the desired print quality. In all screen printing processes, a hydrodynamic pressure is developed in the wedge of print paste that lies between the squeegee and the screen (Dubey, 1975). The quantity of paste that is forced out of the screen depends on this hydrodynamic pressure which in turn depends on the squeegee angle, base length of the pressure zone, speed of movement of squeegee, paste viscosity and screen pore radius (Yen et al, 2011) (Lin et al, 2008) (Thompson, 1995).…”

Section: Introductionmentioning

confidence: 99%

Optimisation of screen printing process for functional printing

Ali

Lin

Faisal

et al. 2019

PRT

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Purpose The purpose of this study is to explain the effects of screen printing parameters on the quantity of ink deposited and the print quality in the context of printing of functional inks. Both these aspects of printing are crucial in the case of conventional and functional printing. This is because, in the case of conventional printing, the quantity of ink deposit affects the color strength while in the case of functional printing, it directly affects the resulting functionality of the ink layer. Design/methodology/approach In this work, an automatic lab-scale screen printer was used to print functional inks on a paper board substrate. The printing parameters, i.e. printing pressure and squeegee angle were altered and the resulting effects on the quantity of ink that was deposited were recorded. The quantity of ink deposit was related to its surface resistivity. In addition, the quality of the print was also assessed by examining the design registration quality. Findings The authors found that altering the squeegee angle has a significant effect on the properties of the resulting ink deposit. More importantly, the authors found that the deflection in the rubber blade squeegee was greatly dependent on the initial angle of the squeegee at the start of the printing stroke. For each set value of the squeegee angle that was considered, the actual angle during printing was recorded and used in the analysis. A printing pressure of three bars and squeegee angle of 20° resulted in the maximum weight of ink deposit with a correspondingly lowest surface resistivity. Practical implications This study is envisaged to have considerable practical implications in the rapidly growing field of functional printing of flexible substrates including, but not limited to, textiles. This is because, the study provides an insight into the effects of printing parameters on the characteristics of a functional ink deposit. Originality/value Screen printing of flexible substrates is a well-developed and arguably the most widely used printing technique, particularly for textiles. Numerous studies report on the analysis of various aspects of screen printing. However, to the best of the knowledge, the effects of printing parameters on the characteristics of functional inks, such as electrically conductive inks, have not been studied in this manner.

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“…Similarly, with the increasing squeegee angle (with respect to the screen) the hydrostatic pressure decreases and thus, reduces the amount of ink transferred on the substrate. Generally an acceptable range of squeegee angle is 45°–60° . When screen printing straight lines for applications such as stretchable interconnects, orientation of features relative to the motion of squeegee should also be taken into consideration. , …”

Section: Printing Methodsmentioning

confidence: 99%

A Guide to Printed Stretchable Conductors

Sakorikar,

Mihaliak,

Krisnadi

et al. 2024

Chem. Rev.

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Printing of stretchable conductors enables the fabrication and rapid prototyping of stretchable electronic devices. For such applications, there are often specific process and material requirements such as print resolution, maximum strain, and electrical/ ionic conductivity. This review highlights common printing methods and compatible inks that produce stretchable conductors. The review compares the capabilities, benefits, and limitations of each approach to help guide the selection of a suitable process and ink for an intended application. We also discuss methods to design and fabricate ink composites with the desired material properties (e.g., electrical conductance, viscosity, printability). This guide should help inform ongoing and future efforts to create soft, stretchable electronic devices for wearables, soft robots, e-skins, and sensors. CONTENTS 1. Introduction 860 1.1.

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The squeegee in printing of electronic circuits

Cited by 10 publications

References 5 publications

Rheological Behaviors and Their Correlation with Printing Performance of Silver Paste for LTCC Tape

Rheological Behaviors and Their Correlation with Printing Performance of Silver Paste for LTCC Tape

Optimisation of screen printing process for functional printing

A Guide to Printed Stretchable Conductors

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