scholarly journals NOISE SPECTROSCOPY OF RESISTIVE COMPONENTS AT ELEVATED TEMPERATURE

2014 ◽  
Vol 21 (1) ◽  
pp. 15-26 ◽  
Author(s):  
Adam Witold Stadler ◽  
Zbigniew Zawiślak ◽  
Andrzej Dziedzic ◽  
Damian Nowak
Keyword(s):  
Thick Film ◽  
Entire Range ◽  
Slow Rate ◽  
Noise Intensity ◽  
Voltage Fluctuations ◽  
Noise Component ◽  
Conductive Materials ◽  
Noise Spectroscopy ◽  
Order Of Magnitude ◽  
Resistance Fluctuations

Abstract Studies of electrical properties, including noise properties, of thick-film resistors prepared from various resistive and conductive materials on LTCC substrates have been described. Experiments have been carried out in the temperature range from 300 K up to 650 K using two methods, i.e. measuring (i) spectra of voltage fluctuations observed on the studied samples and (ii) the current noise index by a standard meter, both at constant temperature and during a temperature sweep with a slow rate. The 1/f noise component caused by resistance fluctuations occurred to be dominant in the entire range of temperature. The dependence of the noise intensity on temperature revealed that a temperature change from 300 K to 650 K causes a rise in magnitude of the noise intensity approximately one order of magnitude. Using the experimental data, the parameters describing noise properties of the used materials have been calculated and compared to the properties of other previously studied thick-film materials.

scholarly journals Virtual instruments in low-frequency noise spectroscopy experiments

2015 ◽  
Vol 28 (1) ◽  
pp. 17-28
Author(s):  
Adam Stadler ◽  
Andrzej Dziedzic
Keyword(s):  
Thick Film ◽  
Virtual Instrument ◽  
Low Frequency ◽  
Low Noise ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Noise Sources ◽  
Noise Component ◽  
Noise Spectroscopy ◽  
Noise Map

Low-frequency noise spectroscopy (LFNS) is an experimental technique to study noise spectra, typically below 10 kHz, as a function of temperature. Results of LFNS may be presented as the ?so-called? noise maps, giving a detailed insight into fluctuating phenomena in electronic devices and materials. The authors show the usefulness of virtual instrument concept in developing and controlling the measurement setup for LFNS experiments. An example of a noise map obtained for polymer thick-film resistors (PTFRs), made of commercial compositions, for temperature range 77 K - 300 K has been shown. The experiments proved that 1/f noise caused by resistance fluctuations is the dominant noise component in the studied samples. However, the obtained noise map revealed also thermally activated noise sources. Furthermore, parameters describing noise properties of resistive materials and components have been introduced and calculated using data from LFNS. The results of the work may be useful for comparison of noise properties of different resistive materials, giving also directions for improvement of thick-film technology in order to manufacture reliable, low-noise and stable PTFRs.

Noise properties of thin-film Ni-P resistors embedded in printed circuit boards

2013 ◽  
Vol 61 (3) ◽  
pp. 731-735
Author(s):  
A.W. Stadler ◽  
Z. Zawiślak ◽  
W. Stęplewski ◽  
A. Dziedzic
Keyword(s):  
Thin Film ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Noise Component ◽  
Printed Circuit ◽  
Resistance Bridge ◽  
Different Types ◽  
Signal Path ◽  
Resistance Fluctuations ◽  
Made In

Abstract. Noise studies of planar thin-film Ni-P resistors made in/on Printed Circuit Boards, both covered with two different types of cladding or uncladded have been described. The resistors have been made of the resistive-conductive-material (Ohmega-Ply©) of 100 Ώ/sq. Noise of the selected pairs of samples has been measured in the DC resistance bridge with a transformer as the first stage in a signal path. 1/f noise caused by resistance fluctuations has been found to be the main noise component. Parameters describing noise properties of the resistors have been calculated and then compared with the parameters of other previously studied thin- and thick-film resistive materials.

Resistance noise spectroscopy of SnO/sub 2/ thick-film gas sensors

2003 ◽  
Author(s):  
J.M. Parks ◽  
B.T. Marquis ◽  
G.P. Harmer ◽  
R.F. Schmitt
Keyword(s):  
Thick Film ◽  
Gas Sensors ◽  
Noise Spectroscopy ◽  
Resistance Noise

scholarly journals Noise Properties of Graphene-Polymer Thick-Film Resistors

2017 ◽  
Vol 24 (4) ◽  
pp. 585-590 ◽  
Author(s):  
Krzysztof Mleczko ◽  
Piotr Ptak ◽  
Zbigniew Zawiślak ◽  
Marcin Słoma ◽  
Małgorzata Jakubowska ◽  
...  
Keyword(s):  
Thick Film ◽  
Room Temperature ◽  
Low Frequency ◽  
Frequency Noise ◽  
Potential Applications ◽  
Noise Measurements ◽  
Manufacturing Technologies ◽  
Main Component ◽  
Resistance Fluctuations ◽  
Parameter Values

AbstractGraphene is a very promising material for potential applications in many fields. Since manufacturing technologies of graphene are still at the developing stage, low-frequency noise measurements as a tool for evaluating their quality is proposed. In this work, noise properties of polymer thick-film resistors with graphene nano-platelets as a functional phase are reported. The measurements were carried out in room temperature. 1/f noise caused by resistance fluctuations has been found to be the main component in the specimens. The parameter values describing noise intensity of the polymer thick-film specimens have been calculated and compared with the values obtained for other thick-film resistors and layers used in microelectronics. The studied polymer thick-film specimens exhibit rather poor noise properties, especially for the layers with a low content of the functional phase.

Partial melt processing of solid-solution Bi2Sr2CaCu2O8+δ thick-film conductors with nanophase Al2O3 additions

2003 ◽  
Vol 18 (5) ◽  
pp. 1054-1066 ◽  
Author(s):  
T. Haugan ◽  
W. Wong-Ng ◽  
L. P. Cook ◽  
M. D. Vaudin ◽  
L. Swartzendruber ◽  
...  
Keyword(s):  
Solid Solution ◽  
Thick Film ◽  
Mole Fraction ◽  
Defect Formation ◽  
Volume Fraction ◽  
Melt Processing ◽  
Superconducting Transition ◽  
Partial Melt ◽  
Order Of Magnitude ◽  
Free Films

Partial-melt processing of Bi2+xSr2-x-yCa1+yCu2O8+δ (Bi-2212) thick-film conductors with additions of nanophase Al2O3 was studied for dual purposes of increasing flux pinning and inhibiting Sr—Ca—Cu—O phase defect formation. Nanophase Al2O3 (<50% mole fraction) was added to Bi:Sr:Ca:Cu:O powders with four different compositions: three with Bi:Cu approximately 2:2 and one (Bi2Sr2.38Ca1.15Cu2.92O9.7+δ) closer to the ideal Bi-2223 composition. The effect of Al2O3 addition on film microstructural and superconducting properties was studied for a range of partial-melt temperatures (865 to 900 °C). Results were compared to Al2O3-free films with compositions lying within the single-phase solid-solution 2212 region. Nanophase Al2O3 reacted with 2212-type precursors to form a composite of micron size or smaller particles of solid-solution (Sr,Ca)3Al2O6 in a solid-solution 2212 superconducting matrix. The Ca content of the (Sr,Ca)3Al2O6 particles formed approximated that of the 2212 precursor (≤6% mole fraction difference). Addition of 6–25% volume fraction of (Sr,Ca)3Al2O6 to Bi-2212 (by reaction between Al2O3 and Bi-2212) only slightly reduced superconducting transition temperatures and c-axis texturing; however this addition improved film quality by reducing Sr—Ca—Cu—O defect volume fraction by factors of 2 to 6 and significantly increased the critical current density by over one order of magnitude for 0 to 2 T applied fields at 20 to 30 K.

scholarly journals A Noise Spectroscopy-Based Selective Gas Sensing with MOX Gas Sensors

2018 ◽  
Vol 17 (02) ◽  
pp. 1850016 ◽  
Author(s):  
S. Gomri ◽  
J. Seguin ◽  
T. Contaret ◽  
T. Fiorido ◽  
K. Aguir
Keyword(s):  
Gas Sensing ◽  
Low Frequency ◽  
Noise Spectroscopy ◽  
Spectrum Density ◽  
Noise Measurements ◽  
Micro Sensor ◽  
Layer Resistance ◽  
Resistance Fluctuations ◽  
Adsorption Desorption ◽  
Frequency Magnitude

We propose a new method for obtaining a fluctuation-enhanced sensing (FES) signature of a gas using a single metal oxide (MOX) gas micro sensor. Starting from our model of adsorption–desorption (A–D) noise previously developed, we show theoretically that the product of frequency by the power spectrum density (PSD) of the gas sensing layer resistance fluctuations often has a maximum which is characteristic of the gas. This property was experimentally confirmed in the case of the detection of NO2 and O3 using a WO3 sensing layer. This method could be useful for classifying gases. Furthermore, our noise measurements confirm our previous model showing that PSD of the A–Dnoise in MOX gas sensor is a combination of Lorentzians having a low frequency magnitude and a cut-off frequency which depends on the nature of the detected gas.

scholarly journals Noise Properties Of Thick-Film Conducting Lines For Integrated Inductors

2015 ◽  
Vol 22 (2) ◽  
pp. 229-240 ◽  
Author(s):  
Adam Witold Stadler ◽  
Andrzej Kolek ◽  
Krzysztof Mleczko ◽  
Zbigniew Zawiślak ◽  
Andrzej Dziedzic ◽  
...  
Keyword(s):  
Thick Film ◽  
Low Frequency ◽  
Low Noise ◽  
Frequency Noise ◽  
Noise Sources ◽  
Noise Component ◽  
Integrated Inductors ◽  
Noise Amplifier ◽  
Straight Segments ◽  
Biased Samples

Abstract Studies of noise properties of thick-film conducting lines from Au or PdAg conductive pastes on LTCC or alumina substrates are reported. Experiments have been carried out at the room temperature on samples prepared in the form of meanders by traditional screen-printing or laser-shaping technique. Due to a low resistance of the devices under test (DUTs), low-frequency noise spectra have been measured for the dc-biased samples arranged in a bridge configuration, transformer-coupled to a low-noise amplifier. The detailed analysis of noise sources in the signal path and its transfer function, including the transformer, has been carried out, and a procedure for measurement setup self-calibration has been described. The 1/f noise component originating from resistance fluctuations has been found to be dominant in all DUTs. The analysis of experimental data leads to the conclusion that noise is produced in the bends of meanders rather than in their straight segments. It occurs that noise of Au-based laser-shaped lines is significantly smaller than screen-printed ones. PdAg lines have been found more resistive but simultaneously less noisy than Au-based lines.

Fluctuating Defect Density Probed with Noise Spectroscopy in Hydrogenated Amorphous Silicon

1997 ◽  
Vol 467 ◽  
Author(s):  
P.A.W.E. Verleg ◽  
O. Uca ◽  
J. I. Dijkhuis
Keyword(s):  
Amorphous Silicon ◽  
Low Temperatures ◽  
Noise Source ◽  
Defect Density ◽  
Hydrogenated Amorphous Silicon ◽  
Weakly Bound ◽  
Thermally Activated ◽  
Noise Spectroscopy ◽  
Resistance Fluctuations ◽  
Hydrogenated Amorphous

ABSTRACTResistance fluctuations have been studied in hydrogenated amorphous silicon in the temperature range between 300 K and 450 K. The primary noise source has a power spectrum of approximately 1/f and is ascribed to hydrogen motion. Hopping of weakly bound hydrogen is thermally activated at such low temperatures with an average activation energy of 0.85 eV. The attempt rate amounts to 7 · 1012 s−1.

scholarly journals Applicability of Different Bio-based Polymers for Wiring Boards

2019 ◽  
Vol 63 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Carolin Henning ◽  
Anna Schmid ◽  
Sophia Hecht ◽  
Kathrin Harre ◽  
Reinhard Bauer
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Cellulose Acetate ◽  
Thick Film ◽  
Electrical Performance ◽  
Biobased Materials ◽  
Board Material ◽  
Order Of Magnitude ◽  
Wiring Board ◽  
Performance Surface

The paper gives a review of experiments for the application of biodegradable, sustainable polymers as a wiring board material. In the paper two different biobased materials and the standard PCB materials FR4 and FR2 were compared. The investigations refer to mechanical, electrical performance, surface quality the flammability and applicability for Polymer Thick Film Technology (PTFT) of the biobased material. The biobased materials are polylactic acid (PLA) mixed with different contents of cellulose acetate (CA) or flame retardant zinc pyrophosphate (ZnPP) and polyurethane (PU) with CA. The results show that the addition of CA to the polymers leads to a change of different properties for PLA and to a significant change in mechanical properties for PU. The use of ZnPP in PLA shows major improvements regarding the flammability of the polymer. The properties of the samples are in the same order of magnitude as the properties of FR2.

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