Electrode Effect on NTC Planar Thermistor Volume Resistivity

Aleksić, O.S.; Radojcić, B; Ramovic, R.

doi:10.1109/icmel.2006.1651033

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…For the calculation of the sheet resistance derived from an interdigitated device, the resistivity and sheet resistance of the material can be written as ρ = R A L R sheet = ρ t = R A L t = R W t L t = R W L where ρ and R sheet represent the resistivity and sheet resistance, and A , W , t , and L represent the material area, width, thickness, and length, respectively. The active channel geometry is shown in Figure a, which is derived from Tyrrell et al’s work .…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Solution-Processed Low Resistivity Zinc Oxide Nanoparticle Film with Enhanced Stability Using EVOH

Qu,

Yong,

Rowlinson

et al. 2024

ACS Appl. Electron. Mater.

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This paper proposes a solution-based fabrication process of the zinc oxide nanoparticle (ZnO NP) film. It achieves a resistivity comparable to that of ZnO deposited by using physical and chemical vapor deposition methods. The process involves exposing the solutionprocessed ZnO NP film to 365 nm ultraviolet light and passivating it with an ethylene vinyl alcohol (EVOH) encapsulant of 80 μm under a vacuum. The manufacturing process has a maximum temperature of 190 °C, enabling use on flexible substrates, such as polyimide. The fabricated ZnO film has a sheet resistance of 2.5 × 10 4 Ω/□ and a thickness of 2.35 μm. The EVOH passivation layer enhanced the film stability, protecting it when exposed to the ambient environment. The resistivity of the ZnO NP layer with EVOH passivation remains unchanged after 60 days in an ambient environment.

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Section: Methodsmentioning

confidence: 99%

“…For the calculation of the sheet resistance derived from an interdigitated device, the resistivity and sheet resistance of the material can be written as 52 RA L =…”

Section: Measurementmentioning

confidence: 99%

Solution-Processed Low Resistivity Zinc Oxide Nanoparticle Film with Enhanced Stability Using EVOH

Qu,

Yong,

Rowlinson

et al. 2024

ACS Appl. Electron. Mater.

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show abstract

“…They consisted of several segments (cells) connected in a series to measure the average temperature and to measure the temperature gradient and wind direction using internal electrodes ( Fig. 1) [11][12][13][14]. Segmented thermistors are larger or smaller in size depending on the self-heat power applied such as: 51 x 6.35 mm 2 1.5-2 W. Compared to other geometries such as interdigitated (high resistance geometry) or sandwich (low resistance geometry) a segmented thermistor enables a medium value of resistance [15] and forms a gradient of temperature along its length in the air flow direction.…”

Section: Introductionmentioning

confidence: 99%

Novel uniaxial anemometer containing NTC thick film segmented thermistors

Menićanin¹,

Aleksić²,

Nikolić³

et al. 2008

2008 26th International Conference on Microelectronics

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A novel uniaxial anemometer was created using a NTC thick film segmented thermistor to measure wind speed and direction. The anemometer operated on the principle of heat loss caused by the air volume flow and air speed. A NTC segmented thermistor served as a wind sensor in the anemometer. It was self-heated by a DC constant voltage. The self-heated DC current through the thermistor was changed by heat loss due to resistivity changes. The wind speed was varied from 1 to 15 m/s for different input air temperatures in the range of -20 to +40°C. The wind direction was determined by measuring voltage differences on the inner electrodes of the NTC segmented thermistor. The air temperature was measure by a cold NTC thick film segmented thermistor calibrated in the claim chamber. Anemometar inertia was measured at room temperature (at 25°C) and normal room humidity (at 50%). The results obtained enable fast optimization and implementation of a uniaxial anemometer in a 3D anemometer.

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“…Electrical resistivity of thick film thermistors was measured on sandwich thermistor constructions. After that, other planar geometries such as: sandwich, multilayer, segmented and interdigitated, were printed, sintered at in the air 850°C/10 min, electrically measured and analyzed (Aleksić et al , 1997, 2004b, 2006).…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of NTC thick film thermistor geometries

Aleksić

Radojcić²,

Ramovic³

2007

Microelectronics International

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PurposeThe paper aims to focus on thick film planar thermistors.Design/methodology/approachThick film planar thermistors such as rectangular, sandwich, multilayer, segmented and interdigitated were printed of law temperature NTC paste called NTC 3K3 95/2 (Ei Iritel). Their resistivity was measured at room temperature as a function of volume resistivity variations due to electrode effect (diffusion of PdAg into NTC layer) and variation of geometrical parameters such as length l, width w, thickness d, number of segments n. The experimental data obtained were used in forming a model by the simple fitting procedure for counting diffusion effect on volume resistivity and resistivity dependence on geometrical parameters.FindingsThermal behavior of NTC thick films was measured in the range of −30‐120°C. Exponential factor B was fitted for measured values and included in the proposed thick film thermistors model. The agreement of measured and calculated data enables simulation of new thermistor geometries.Originality/valueThe paper focuses on the experiment which was the first step in forming a total physical/mathematical model proposed for thick film thermistor resistivity.

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Electrode Effect on NTC Planar Thermistor Volume Resistivity

Cited by 5 publications

References 7 publications

Solution-Processed Low Resistivity Zinc Oxide Nanoparticle Film with Enhanced Stability Using EVOH

Solution-Processed Low Resistivity Zinc Oxide Nanoparticle Film with Enhanced Stability Using EVOH

Novel uniaxial anemometer containing NTC thick film segmented thermistors

Modeling and simulation of NTC thick film thermistor geometries

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