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Article
Publication date: 12 May 2020

Tomasz Matusiak, Krzysztof Swiderski, Jan Macioszczyk, Piotr Jamroz, Pawel Pohl and Leszek Golonka

The purpose of this paper is to present a study on miniaturized instruments for analytical chemistry with a microplasma as the excitation source.

814

Abstract

Purpose

The purpose of this paper is to present a study on miniaturized instruments for analytical chemistry with a microplasma as the excitation source.

Design/methodology/approach

The atmospheric pressure glow microdischarge could be ignited inside a ceramic structure between a solid anode and a liquid cathode. As a result of the cathode sputtering of the solution, it was possible to determine its chemical composition by analyzing the emission spectra of the discharge. Cathodes with microfluidic channels and two types of anodes were constructed. Both types were tested through experimentation. Impact of the electrodes geometry on the discharge was established. A cathode aperture of various sizes and anodes made from different materials were used.

Findings

The spectroscopic properties of the discharge and its usefulness in the analysis depended on the ceramic structure. The surface area of the cathode aperture and the flow rate of the solution influence on the detection limits (DLs) of Zn and Cd.

Originality/value

Constructed ceramic structures were able to excite elements and their laboratory-size systems. During the experiments, Zn and Cd were detected with DLs 0.024 and 0.053 mg/L, respectively.

Details

Sensor Review, vol. 40 no. 4
Type: Research Article
ISSN: 0260-2288

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Article
Publication date: 1 February 1988

L. Golonka, J. Kozlowski and K. Nitsch

The rapid assessment of thick film resistor reliability is presented. This relies on the application of constant power pulses. The long‐term stability of the resistors is…

33

Abstract

The rapid assessment of thick film resistor reliability is presented. This relies on the application of constant power pulses. The long‐term stability of the resistors is predicted on the basis of the value of the minimal destroyed power applied during the pulse. The results are compared with the long‐term behaviour of the tested samples.

Details

Microelectronics International, vol. 5 no. 2
Type: Research Article
ISSN: 1356-5362

Available. Content available
Article
Publication date: 1 August 1999

176

Abstract

Details

Microelectronics International, vol. 16 no. 2
Type: Research Article
ISSN: 1356-5362

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Article
Publication date: 1 February 1992

L. Golonka, J. Kozlowski, B.W. Licznerski, K. Nitsch and A. Seweryn

This paper presents experimental data associated with the properties of thick film thermistors based on a spinel‐type semiconducting oxide/RuO2/glass system. The following…

23

Abstract

This paper presents experimental data associated with the properties of thick film thermistors based on a spinel‐type semiconducting oxide/RuO2/glass system. The following parameters—sheet resistivity, thermistor (B) and thermal time (?) constants—have been measured, all as functions of different composition and construction variants. The thermistor properties are independent of configuration and are mainly determined by the semiconducting oxide particle chains. The correlation between B and ? for the compositions considered has been observed.

Details

Microelectronics International, vol. 9 no. 2
Type: Research Article
ISSN: 1356-5362

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Article
Publication date: 1 August 2005

L.J. Golonka, M. Buczek, M. Hrovat, D. Belavič, A. Dziedzic, H. Roguszczak and T. Zawada

To find properties of screen printed PZT (PbZr0.53Ti0.47O3 with 6 per cent of PbO and 2 per cent of Pb5Ge3O11) thick films layers on LTCC substrate.

504

Abstract

Purpose

To find properties of screen printed PZT (PbZr0.53Ti0.47O3 with 6 per cent of PbO and 2 per cent of Pb5Ge3O11) thick films layers on LTCC substrate.

Design/methodology/approach

The influence of PZT firing time and electrode materials on electrical characteristics and microstructure were examined. A scanning electron microscope (SEM) equipped with an energy‐dispersive X‐ray (EDS) analyser was used for the microstructural and compositional analysis.

Findings

Microstructural and compositional analyses have shown the diffusion of SiO2 from LTCC into PZT layers and the diffusion of PbO in the opposite direction. SiO2 presumably forms low permitivity lead based silicates in PZT layer. The new phase deteriorates the piezoelectric properties. The amount of diffused materials was dependent upon the electrode material and increased with increasing firing time. Better properties, i.e. higher remanent polarisation and dielectric constant were achieved for samples with PdAg electrodes and shorter firing time.

Originality/value

New information on electrical and microstructural properties of thick film PZT made on LTCC substrate.

Details

Microelectronics International, vol. 22 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

Available. Content available
Article
Publication date: 1 August 2002

67

Abstract

Details

Microelectronics International, vol. 19 no. 2
Type: Research Article
ISSN: 1356-5362

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Article
Publication date: 1 September 2006

Marko Hrovat, Darko Belavič, Jaroslaw Kita, Janez Holc, Silvo Drnovšek, Jena Cilenšek, Leszek Golonka and Andrzej Dziedzic

Aims to evaluate different thick‐film materials for use in strain sensors and temperature sensors on low‐temperature co‐fired ceramic (LTCC) substrates.

1401

Abstract

Purpose

Aims to evaluate different thick‐film materials for use in strain sensors and temperature sensors on low‐temperature co‐fired ceramic (LTCC) substrates.

Design/methodology/approach

LTCC materials are sintered at the low temperatures typically used for thick‐film processing, i.e. around 850°C, The thick‐film resistor materials for use as strain and temperature sensors on LTCC tapes are studied. Thick‐film piezo‐resistors in the form of strain‐gauges are realised with 10 kΩ/sq. 2041 (Du Pont)and 3414‐B (ESL), resistor materials; thick‐film temperature‐dependent resistors were made from PTC 5093 (Du Pont), and NTC‐4993 (EMCA Remex) resistor materials.

Findings

The X‐ray spectra of the 2041 and 3414‐Bb low TCR resistors after drying at 150°C and after firing display more or less the same peaks. The electrical characteristics of 2041 resistors fired on alumina and LTCC substrates are similar indicating that the resistors are compatible with the LTCC material. After firing on LTCC substrates the sheet resistivities and TCRs of the 3414‐B resistors increased. Also, there is a significant increase in the GFs from 13 to over 25.

Originality/value

Investigates the compatibility of thick‐film materials and the characteristics of the force and temperature sensors.

Details

Microelectronics International, vol. 23 no. 3
Type: Research Article
ISSN: 1356-5362

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Article
Publication date: 27 July 2012

Eszter Horvath, Gabor Henap and Gabor Harsanyi

In microfluidic channel fabrication in low temperature co‐fired ceramics (LTCC), one of the biggest challenges is the elimination of channel deformation during lamination. The…

164

Abstract

Purpose

In microfluidic channel fabrication in low temperature co‐fired ceramics (LTCC), one of the biggest challenges is the elimination of channel deformation during lamination. The purpose of this paper is to describe the expected deformation of the substrate and the sacrificial layer (starch powder and 3D printed UV polymerized material) during the lamination process of microfluidic structure fabrication.

Design/methodology/approach

Uniaxial compression and Jenike shear test were used to obtain the mechanical parameters of starch sacrificial volume material (SVM). To determine the stress‐strain characteristics of LTCC a uniaxial compression experiment was conducted. The shape of the laminated LTCC containing embedded channel was modeled by finite element method using the mechanical parameters obtained by the measurements.

Findings

It was found that the choice of SVM plays an important role in channel deformation. A design rule is given considering the channel width and the choice of SVM based on the simulation results.

Originality/value

Until now the lamination step of LTCC technology was only optimized in an empirical way.

Details

Microelectronics International, vol. 29 no. 3
Type: Research Article
ISSN: 1356-5362

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Article
Publication date: 26 July 2013

Dominik Jurków

The paper aims to present numerical modeling and technology of a very first three axial low temperature cofired ceramics (LTCC) accelerometer.

189

Abstract

Purpose

The paper aims to present numerical modeling and technology of a very first three axial low temperature cofired ceramics (LTCC) accelerometer.

Design/methodology/approach

Low temperature cofired ceramics technology was applied in the fabrication process of the novel device. The numerical modeling was used to predict the properties of the accelerometer, moreover, design of the experiment methodology was used to reduce time of simulation and to get as much as information from the experiment as possible.

Findings

The low temperature cofired ceramics make it possible to fabricate three axial accelerometer.

Research limitations/implications

The presented device is just a first prototype. Therefore, further research work will be needed to improve structural drawbacks and to analyze precisely the device reliability and parameters repeatability.

Practical implications

The device presented in the paper can be applied in systems working in a harsh environment (high temperature and humidity). Ceramic sensors can withstand temperatures up to 600°C.

Originality/value

This paper presents novel three axial LTCC accelerometer.

Details

Microelectronics International, vol. 30 no. 3
Type: Research Article
ISSN: 1356-5362

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Article
Publication date: 1 August 2016

Jan Macioszczyk, Karol Malecha and Leszek J. Golonka

The purpose of this paper is a presentation of a miniature vertical dielectric barrier discharge (DBD) plasma generators. The presented devices, with sub- and superstrate, were…

182

Abstract

Purpose

The purpose of this paper is a presentation of a miniature vertical dielectric barrier discharge (DBD) plasma generators. The presented devices, with sub- and superstrate, were made using low temperature co-fired ceramics (LTCC). Such construction allowed to measure discharge spectra and device temperature easily.

Design/methodology/approach

The generators were made in the Du Pont 951 system with silver vertical metallizations and PdAg contacts. The devices had electrodes with different width and height. Also, the distance between them could be established. They were placed on substrate with buried temperature sensor and covered with a ceramic lid. The lid had opening to measure emitted light. Different configurations of vertical DBD were tested.

Findings

Geometry of vertical metallizations influences on spectra, as well as distance between them. Signal-to-noise ratio had a maximum for certain generators and can be measured by the intensity of highest peak.

Research limitations/implications

Height of vertical metallizations is limited by the difference in shrinkage of LTCC tape and via paste. Parameters of temperature sensors vary between measurements, according to rapid changes of temperature and presence of strong electric field.

Practical implications

The generators can be used for creating discharge for optical emission spectrometry. It is a convenient method to determine the amount of selected gas compounds.

Originality/value

This paper shows fabrication and performance of the novel vertical DBD generators with ceramic additions for convenient spectra measurement and monitoring temperature of the device during work.

Details

Microelectronics International, vol. 33 no. 3
Type: Research Article
ISSN: 1356-5362

Keywords

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