Dependence of capacitance on electrode configuration for ferroelectric films with interdigital electrodes

Wang, Yu; Chong, Nui; Cheng, Y. L.; Chan, H.L.W.; Choy, C. L.

doi:10.1016/s0167-9317(02)01015-8

Cited by 16 publications

(9 citation statements)

References 10 publications

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“…1a) was selected as a practical design for both simulation and future fabrication. As reported by Wang [13], the capacitance of the interdigitated electrodes is proportional to an increase in electrode thickness, electrode width, electrode overlap, number of electrodes, and dielectric constant of the medium, and inversely proportional to electrode spacing.…”

Section: Methodsmentioning

confidence: 59%

“…To simulate the effect of the fabric on top of the capacitive sensor, a dielectric permittivity sweep from 1 to 10 was performed in the Stationary Electrostatic Model and the corresponding capacitance values were calculated. The capacitance of interdigitated structure as a function of its geometrical parameters has been reported [13,14]; hence, the proposed geometry (Fig. 1a) was selected as a practical design for both simulation and future fabrication.…”

Section: Methodsmentioning

confidence: 99%

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Skin Hydration Sensor for Customizable Electronic Textiles

Yokus

Daniele

2016

MRS Advances

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This paper introduces the design and simulated operation of a capacitive hydration sensor for integration into textile-based electronics. The multilayer patch is composed of a textile layer and an attached series of serpentine-interdigitated electrodes. The model used for simulations incorporated this design onto a representative model of skin. The serpentine-interdigitated electrodes are electrodes for capacitive measurement of skin hydration. In this study, the capacitance change relative to skin hydration was simulated using finite element analysis. The simulation results suggest the fabric layer had little effect on the capacitance of the sensor. Furthermore, the frequency domain simulations indicated that the capacitance of the sensor decreased with increasing frequency, and the decrease in capacitance was more significant for the dry skin compared to the wet skin. Therefore, the variation in the capacitance value of the serpentine-interdigitated electrodes can be employed for continuous skin hydration detection.

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Section: Methodsmentioning

confidence: 59%

Section: Methodsmentioning

confidence: 99%

Skin Hydration Sensor for Customizable Electronic Textiles

Yokus

Daniele

2016

MRS Advances

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“…Electrical properties were studied by a technique where sample is coated onto the IDC, with the response variable of electrical capacitance, determined according to Gevorgian model [41]. …”

Section: Methodsmentioning

confidence: 99%

Feasibility of a Gelatin Temperature Sensor Based on Electrical Capacitance

Silva

Sorli

Calado

et al. 2016

Sensors

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The innovative use of gelatin as a temperature sensor based on capacitance was studied at a temperature range normally used for meat cooking (20–80 °C). Interdigital electrodes coated by gelatin solution and two sensors of different thicknesses (38 and 125 µm) were studied between 300 MHz and 900 MHz. At 38 µm, the capacitance was adequately measured, but for 125 µm the slope capacitance versus temperature curve decreased before 900 MHz due to the electrothermal breakdown between 60 °C and 80 °C. Thus, for 125 µm, the capacitance was studied applying 600 MHz. Sensitivity at 38 µm at 868 MHz (0.045 pF/°C) was lower than 125 µm at 600 MHz (0.14 pF/°C), influencing the results in the simulation (temperature range versus time) of meat cooking; at 125 µm, the sensitivity was greater, mainly during chilling steps. The potential of gelatin as a temperature sensor was demonstrated, and a balance between thickness and frequency should be considered to increase the sensitivity.

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“…Silicon dioxide has been used as the primary dielectric material for silicon-based devices for many years. Alternatives for replacing SiO 2 by dielectrics with high permittivity constants are currently being investigated [ 7 – 9 ]. More recently, many dielectrics with high permittivity constants have been suggested as replacement candidates for silicon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of Interdigital Nanocapacitors Coated with HfO2

González

Kolosovas-Machuca

López‐Luna

et al. 2015

Sensors

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In this article nickel interdigital capacitors were fabricated on top of silicon substrates. The capacitance of the interdigital capacitor was optimized by coating the electrodes with a 60 nm layer of HfO2. An analytical solution of the capacitance was compared to electromagnetic simulations using COMSOL and with experimental measurements. Results show that modeling interdigital capacitors using Finite Element Method software such as COMSOL is effective in the design and electrical characterization of these transducers.

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Dependence of capacitance on electrode configuration for ferroelectric films with interdigital electrodes

Cited by 16 publications

References 10 publications

Skin Hydration Sensor for Customizable Electronic Textiles

Skin Hydration Sensor for Customizable Electronic Textiles

Feasibility of a Gelatin Temperature Sensor Based on Electrical Capacitance

Design and Fabrication of Interdigital Nanocapacitors Coated with HfO2

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