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

Alias, Rosidah; Shapee, Sabrina Mohd

doi:10.5772/35004

Cited by 18 publications

(19 citation statements)

References 50 publications

(34 reference statements)

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“…It is clear that higher viscosity is better for good print resolution and a line is considered to have good connectivity when there is no break along it. They further showed that optimizing the rheological behavior of the conductor paste and the screen parameters are key for successful screen printing (Alias and Shapee, 2012). Kurzweil and Loughran (1973) did the earliest work on a thick-fi lm paste for multilayer use and demonstrated that this conductor paste generally gave acceptable printing qualities and it faithfully reproduced the patterns in the dried 24.2 Discontinuities and geometry deformation of a line.…”

Section: Fine Line Disconnectionmentioning

confidence: 97%

“…This may be due to poor rheology or a fl aw in the screen. With regard to rheology, Alias and Shapee (2012) determined the relation between the rheological condition and performance of a silver paste for an LTCC tape. The rheology of the paste is the main factor that affects poor print resolution.…”

Section: Fine Line Disconnectionmentioning

confidence: 99%

“…Good via hole alignment is needed for good connections between the layers, which is required to ensure the continuity of the circuit in three dimensions. In a via fi lling process, the conductor paste is packed into the cylindrical via holes, 24.3 Screen mesh with orientation 325 of stainless steel with 22.5 ° angles (Alias and Shapee, 2012).…”

Section: Misalignmentmentioning

confidence: 99%

See 2 more Smart Citations

Multilayer glass–ceramic composites for microelectronics: processing and properties

Alias

2014

Advances in Ceramic Matrix Composites

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Section: Fine Line Disconnectionmentioning

confidence: 97%

Section: Fine Line Disconnectionmentioning

confidence: 99%

Section: Misalignmentmentioning

confidence: 99%

See 1 more Smart Citation

Multilayer glass–ceramic composites for microelectronics: processing and properties

Alias

2014

Advances in Ceramic Matrix Composites

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“…Dot spread resulting into TVI occurs if thixotropy is too weak and it is difficult to transfer ink if thixotropy is too strong [7]. Many printing processes including screen printing especially using silver paste also recommend higher viscosity during printing which resulted into better print resolution [8]. Color changes in print result can be attributable to changes in ink viscosity rather than process parameters [9].…”

Section: Introductionmentioning

confidence: 99%

Correlation of ink viscosity and printability in offset lithography process on paperboard used in packaging

Mahajan¹,

Bandyopadhyay

2019

ACTA GRAPHICA

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In the recent years, the demands for offset inks with better flow ability and viscosity have risen higher with the improvements of printing techniques. To ensure uniformity in printability sheet after sheet it is very important to maintain certain print conditions for that print job as approved by customers and use this data for future reference of printing. The quality of offset printing process depends on many chemical and physical specifications of the ma terials and components involved in the process. Most important being printing inks and its rheology. In this work, three process color cyan inks have been formulated with varying levels of viscosity with use of certain rheology modifiers. Trials on the printing machine were conducted using a systematic layout of test elements on a fully automatic offset lithography printing machine using a Solid Bleached Sulphite Board (SBS) and the print results were correlated to rheological parameters such as viscosity and thixotropy. The tone value increase (TVI) was measured and was correlated to viscosity and index of thixotropy. Higher viscosity yields lower dot gain and better color reproducibility. A mathematical relation has been established between ink viscosity, dot area and tone value increase. As the demands for packaging increases, the study about the ink rheology and its effect on print performance can help printers and ink manufacturers with better ink formulations to achieve precise print results.

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“…During the application or coating step, the inks are subjected to high shear rates that vary strongly with the chosen printing technique (e.g., screen printing s −1 , dispensing s −1 ) followed by a deformation rate close to zero when the ink settles on the substrate 27 28 . Therefore, the inks are required to exhibit low high-shear viscosity that allows the ink to easily flow when passing through the screen mesh or dispensing nozzle during application while also possessing a high low-shear viscosity and a fast network recovery providing good shape accuracy to the printed structure.…”

mentioning

confidence: 99%

Highly conductive, printable pastes from capillary suspensions

Schneider¹,

Koos²,

Willenbacher³

2016

Sci Rep

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We have used the capillary suspension phenomenon to design conductive pastes for printed electronic applications, such as front side metallization of solar cells, without non-volatile, organic additives that often deteriorate electrical properties. Adding a small amount of a second, immiscible fluid to a suspension creates a network of liquid bridges between the particles. This capillary force-controlled microstructure allows for tuning the flow behavior in a wide range. Yield stress and low-shear viscosity can be adjusted such that long-term stability is provided by inhibiting sedimentation, and, even more importantly, narrow line widths and high aspect ratios are accessible. These ternary mixtures, called capillary suspensions, exhibit a strong degree of shear thinning that allows for conventional coating or printing equipment to be used. Finally, the secondary fluid, beneficial for stability and processing of the wet paste, completely evaporates during drying and sintering. Thus, we obtained high purity silver and nickel layers with a conductivity two times greater than could be obtained with state-of-the-art, commercial materials. This revolutionary concept can be easily applied to other systems using inorganic or even organic conductive particles and represents a fundamental paradigm change to the formulation of pastes for printed electronics.

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

Cited by 18 publications

References 50 publications

Multilayer glass–ceramic composites for microelectronics: processing and properties

Multilayer glass–ceramic composites for microelectronics: processing and properties

Correlation of ink viscosity and printability in offset lithography process on paperboard used in packaging

Highly conductive, printable pastes from capillary suspensions

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