Aerosol jet printing of two component thick film resistors on LTCC

2013 ◽  
Vol 2013 (CICMT) ◽  
pp. 000240-000246 ◽  
Author(s):  
K. Swiecinski ◽  
M. Ihle ◽  
R. Jurk ◽  
E. Dietzen ◽  
U. Partsch ◽  
...  
Keyword(s):  
Particle Size ◽  
Thick Film ◽  
Glass Powder ◽  
New Technology ◽  
Organic Additives ◽  
Powder Mixtures ◽  
Conducting Phase ◽  
Aerodynamic Properties ◽  
Jet Printing ◽  
Aerosol Jet Printing

Aerosol jet printing is a rather new technology for the deposition of thick film structures offering high line and space resolution. This offers a high potential for miniaturization for thick film structures. The advantages of this technology could be shown with inks carrying single solid powder (e.g. silver, platinum, ceramic or glass powder). Challenging is printing of solid powder mixtures due to the differences in the aerodynamic properties of different powders. Those differences result in changes of the mixing ratio within the aerosol jet and therefore poor reproducibility in the final film properties is obtained. In this work, thick film resistors consisting of RuO2 with particle size < 1 μm as the conducting phase and different glass powders with particle size around 1 μm as the isolating phase were investigated. One glass had a density rather close to RuO2, the other glass significantly lower. Inks were made from RuO2/glass powder mixtures, a solvent and organic additives. After manufacturing the inks are printed on LTCC and the microstructures of the dried and the fired films were visualized by FIB preparation and SEM. The resistances as well as the temperature coefficients of the resistors were measured and compared to resistor films with an identical solid composition manufactured by conventional screen printing. The results of the obtained resistors are presented and discussed in terms of powder properties, ink dispersion and printing parameters.

Aerosol Jet Printing of Two Component Thick Film Resistors on LTCC

2013 ◽  
Vol 10 (3) ◽  
pp. 109-115 ◽  
Author(s):  
K. Swiecinski ◽  
M. Ihle ◽  
R. Jurk ◽  
E. Dietzen ◽  
U. Partsch ◽  
...  
Keyword(s):  
Particle Size ◽  
Thick Film ◽  
Glass Powder ◽  
New Technology ◽  
Organic Additives ◽  
Powder Mixtures ◽  
Conducting Phase ◽  
Aerodynamic Properties ◽  
Jet Printing ◽  
Aerosol Jet Printing

Aerosol jet printing is a rather new technology for the deposition of thick film structures offering high line and space resolution. This method offers high potential for miniaturization for thick film structures. The advantages of this technology could be shown with inks carrying a single solid powder (e.g., silver, platinum, ceramic, or glass powder). One of the challenges in printing solid powder mixtures is the differences in the aerodynamic properties of different powders. Those differences result in changes of the mixing ratio within the aerosol jet and therefore poor reproducibility in the finished film. In this work, thick film resistors consisting of RuO2 with particle size <1 μm as the conducting phase and different glass powders with particle size around 1 μm as the isolating phase were investigated. One glass had a density rather close to RuO2, the other glass significantly lower. Inks were made from RuO2/glass powder mixtures, a solvent, and organic additives. After manufacturing, the inks are printed on LTCC and the microstructures of the dried and the fired films were visualized by FIB preparation and SEM. The resistances as well as the temperature coefficients of the resistors were measured and compared with resistor films with an identical solid composition manufactured by conventional screen printing. The results of the obtained resistors are presented and discussed in terms of powder properties, ink dispersion, and printing parameters.

Ceramic decals – predesigned thick-film sensors for variable surfaces

2015 ◽  
Vol 2015 (1) ◽  
pp. 000262-000266
Author(s):  
Thomas Seuthe ◽  
Markus Eberstein ◽  
Rolf Petersen ◽  
Hans-Jürgen Amann
Keyword(s):  
Thick Film ◽  
Bottom Layer ◽  
Sintering Behavior ◽  
Planar Surfaces ◽  
Safety Glass ◽  
Burn Out ◽  
Jet Printing ◽  
Screen Print ◽  
Aerosol Jet Printing ◽  
Film Assembly

Manufacturing of ceramic multilayer applications by deposition techniques like screen printing, dispensing, or aerosol jet printing is state of the art today. However, in an industrial environment it is a complex challenge to integrate all equipment for precise paste handling and screen print of the microstructures in an existing production line. Moreover, big sized devices or items with a curved surface cannot be handled with standard screen print equipment. To overcome these limitations, a decal technology was investigated. The functional layers are stacked on non-adhesive paper by screen print, fulfilling all demands on precision in line/space ratio and layer thickness. Afterwards, a polymer varnish is printed on top of the stack, which allows to transfer the high precision thick film assembly to nearly any application surface including non-planar surfaces. Since the layers are co-fired, the sintering behavior of the materials has to be regulated. The top layer needs to remain porous until the organic burn-out and the sintering of the bottom layer is complete. Ways to obtain thick film metallization and isolation pastes which have satisfying firing behavior are examined, and the excellent functional properties are discussed. The performance of the developed thick film decals is demonstrated on the example of an alarm sensor on tempered safety glass for windows.

Novel Technology Options for Multilayer-Based Ceramic Microsystems

2011 ◽  
Vol 8 (3) ◽  
pp. 95-101 ◽  
Author(s):  
Uwe Partsch ◽  
Adrian Goldberg ◽  
Martin Ihle ◽  
Gunter Hagen ◽  
D. Arndt
Keyword(s):  
New Technology ◽  
Pressure Sensors ◽  
Cell System ◽  
Uv Laser ◽  
Fuel Cell System ◽  
Novel Technology ◽  
Jet Printing ◽  
Cofired Ceramics ◽  
Aerosol Jet Printing ◽  
New Machine

Ceramic multilayer technologies such as LTCC (low temperature cofired ceramics) or HTCC (high temperature cofired ceramics) are applied for the fabrication of highly integrated ceramic microelectronic packages. Furthermore, ceramic multilayer technologies offer the possibility of additionally integrating 3D structures for multilayer-based microsystems. This paper presents a new machine for tape/multilayer structuring that combines micro punching tools and micro UV-laser ablation/cutting. The application for the production of different multilayer-based components is described (e.g., LTCC-based PEM fuel cell system, LTCC-based pressure sensors). Aerosol jet printing is a new technology, for example, for rapid prototyping for LTCC multilayer and 3D deposition of functional layers on LTCC. Advantages and limitations of the technology are discussed.

A knowledge transfer framework to support rapid process modeling in aerosol jet printing

2021 ◽  
Vol 48 ◽  
pp. 101264
Author(s):  
Haining Zhang ◽  
Joon Phil Choi ◽  
Seung Ki Moon ◽  
Teck Hui Ngo
Keyword(s):  
Knowledge Transfer ◽  
Process Modeling ◽  
Rapid Process ◽  
Jet Printing ◽  
Aerosol Jet Printing

scholarly journals Synthesis of magnesium carbonate hydrate from natural talc

2020 ◽  
Vol 18 (1) ◽  
pp. 951-961
Author(s):  
Qiuju Chen ◽  
Tao Hui ◽  
Hongjuan Sun ◽  
Tongjiang Peng ◽  
Wenjin Ding
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Crystal Growth ◽  
Crystal Morphology ◽  
Magnesium Carbonate ◽  
Organic Additives ◽  
X Ray Diffraction ◽  
Morphological Transformation ◽  
X Ray ◽  
Carbonation Process

AbstractVarious morphologies of magnesium carbonate hydrate had been synthesized without using any organic additives by carefully adjusting the reaction temperature and time during the talc carbonation process. At lower temperatures, magnesium carbonate hydrate was prone to display needle-like morphology. With the further increase of the carbonation temperature, the sheet-like crystallites became the preferred morphology, and at higher aging temperatures, these crystallites tended to assemble into layer-like structures with diverse morphologies, such as rose-like particles and nest-like structure. The reaction time had no effect on the crystal morphology, but it affected the particle size and situation of the crystal growth. X-Ray diffraction results showed that these various morphologies were closely related to their crystal structure and compositions. The needle-like magnesium carbonate hydrate had a formula of MgCO3·3H2O, whereas with the morphological transformation from needle-like to sheet-like, rose-like, and nest-like structure, their corresponding compositions also changed from MgCO3·3H2O to 4MgCO3·Mg(OH)2·8H2O, 4MgCO3·Mg(OH)2·5H2O, and 4MgCO3·Mg(OH)2·4H2O.

scholarly journals Synthesis of Printable Polyvinyl Alcohol for Aerosol Jet and Inkjet Printing Technology

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 220
Author(s):  
Mahmuda Akter Monne ◽  
Chandan Qumar Howlader ◽  
Bhagyashree Mishra ◽  
Maggie Yihong Chen
Keyword(s):  
Polyvinyl Alcohol ◽  
Inkjet Printing ◽  
Micro Electro Mechanical System ◽  
Device Fabrication ◽  
Silicon Substrates ◽  
Excellent Candidate ◽  
Jet Printing ◽  
Inkjet Printing Technology ◽  
Transistor Fabrication ◽  
Aerosol Jet Printing

Polyvinyl Alcohol (PVA) is a promising polymer due to its high solubility with water, availability in low molecular weight, having short polymer chain, and cost-effectiveness in processing. Printed technology is gaining popularity to utilize processible solution materials at low/room temperature. This work demonstrates the synthesis of PVA solution for 2.5% w/w, 4.5% w/w, 6.5% w/w, 8.5% w/w and 10.5% w/w aqueous solution was formulated. Then the properties of the ink, such as viscosity, contact angle, surface tension, and printability by inkjet and aerosol jet printing, were investigated. The wettability of the ink was investigated on flexible (Kapton) and non-flexible (Silicon) substrates. Both were identified as suitable substrates for all concentrations of PVA. Additionally, we have shown aerosol jet printing (AJP) and inkjet printing (IJP) can produce multi-layer PVA structures. Finally, we have demonstrated the use of PVA as sacrificial material for micro-electro-mechanical-system (MEMS) device fabrication. The dielectric constant of printed PVA is 168 at 100 kHz, which shows an excellent candidate material for printed or traditional transistor fabrication.

Influence of organic additives on the properties of impregnation solutions and on nickel oxide particle size for Ni/Al2O3 catalysts

2014 ◽  
Vol 235 ◽  
pp. 250-255 ◽  
Author(s):  
Faiza Bentaleb ◽  
Michel Che ◽  
Anne-Claire Dubreuil ◽  
Cécile Thomazeau ◽  
Eric Marceau
Keyword(s):  
Particle Size ◽  
Nickel Oxide ◽  
Oxide Particle ◽  
Organic Additives ◽  
Oxide Particle Size

Fabrication of Nanostructured Fe-Co Alloy Powders by Hydrogen Reduction and Its Magnetic Properties

2007 ◽  
Vol 534-536 ◽  
pp. 1389-1392
Author(s):  
Young Jung Lee ◽  
Baek Hee Lee ◽  
Gil Su Kim ◽  
Kyu Hwan Lee ◽  
Young Do Kim
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Grain Size ◽  
Magnetic Properties ◽  
Nanostructured Materials ◽  
Hydrogen Reduction ◽  
Internal Strain ◽  
Oxide Powder ◽  
Powder Mixtures ◽  
Effect Of Microstructure

Magnetic properties of nanostructured materials are affected by the microstructures such as grain size (or particle size), internal strain and crystal structure. Thus, it is necessary to study the synthesis of nanostructured materials to make significant improvements in their magnetic properties. In this study, nanostructured Fe-20at.%Co and Fe-50at.%Co alloy powders were prepared by hydrogen reduction from the two oxide powder mixtures, Fe2O3 and Co3O4. Furthermore, the effect of microstructure on the magnetic properties of hydrogen reduced Fe-Co alloy powders was examined using XRD, SEM, TEM, and VSM.

scholarly journals Effect of Particle Size Distribution on Powder Packing and Sintering in Binder Jetting Additive Manufacturing of Metals

2017 ◽  
Vol 139 (8) ◽  
Author(s):  
Yun Bai ◽  
Grady Wagner ◽  
Christopher B. Williams
Keyword(s):  
Particle Size ◽  
Additive Manufacturing ◽  
Large Degree ◽  
Full Density ◽  
Powder Particle Size ◽  
Powder Mixtures ◽  
Fine Powders ◽  
Sintering Shrinkage ◽  
The Impact ◽  
Binder Jetting

The binder jetting additive manufacturing (AM) process provides an economical and scalable means of fabricating complex parts from a wide variety of materials. While it is often used to fabricate metal parts, it is typically challenging to fabricate full density parts without large degree of sintering shrinkage. This can be attributed to the inherently low green density and the constraint on powder particle size imposed by challenges in recoating fine powders. To address this issue, the authors explored the use of bimodal powder mixtures in the context of binder jetting of copper. A variety of bimodal powder mixtures of various particle diameters and mixing ratios were printed and sintered to study the impact of bimodal mixtures on the parts' density and shrinkage. It was discovered that, compared to parts printed with monosized fine powders, the use of bimodal powder mixtures improves the powder's packing density (8.2%) and flowability (10.5%), and increases the sintered density (4.0%) while also reducing the sintering shrinkage (6.4%).

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