Measurement of Coating Thickness and Loading Using Concentric Fringing Electric Field Sensors

Wang, Hsiu-Che; Zyuzin, A.S.; Mamishev, A.V.

doi:10.1109/jsen.2013.2279991

Cited by 21 publications

(11 citation statements)

References 12 publications

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“…The FEF sensor allows non-contact measurements for reason that electrodes of the sensor are completely isolated from the analyte, which is its most significant advantage over parallel-plate-type capacitors. Non-contact measurements with FEF sensors provide reliable information about material’s characteristic and property [12]. Due to possessing these features, the FEF sensor is used in many fields, for example, for soil moisture measurement, making changes in a material’s dielectrics, in motion sensors, to improve a material’s properties and to measure the moisture content of agricultural commodities [13,14,15].…”

Section: Theory Of a Fringing Electric Field Sensormentioning

confidence: 99%

Fringing Electric Field Sensors for Anti-Attack at System-Level Protection

Gao

Zhao

2018

Sensors

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Information system security has been in the spotlight of individuals and governments in recent years. Integrated Circuits (ICs) function as the basic element of communication and information spreading, therefore they have become an important target for attackers. From this perspective, system-level protection to keep chips from being attacked is of vital importance. This paper proposes a novel method based on a fringing electric field (FEF) sensor to detect whether chips are dismantled from a printed circuit board (PCB) as system-level protection. The proposed method overcomes the shortcomings of existing techniques that can be only used in specific fields. After detecting a chip being dismantled from PCB, some protective measures like deleting key data can be implemented to be against attacking. Fringing electric field sensors are analyzed through simulation. By optimizing sensor’s patterns, areas and geometrical parameters, the methods that maximize sensitivity of fringing electric field sensors are put forward and illustrated. The simulation is also reproduced by an experiment to ensure that the method is feasible and reliable. The results of experiments are inspiring in that they prove that the sensor can work well for protection of chips and has the advantage of universal applicability, low cost and high reliability.

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Section: Theory Of a Fringing Electric Field Sensormentioning

confidence: 99%

Fringing Electric Field Sensors for Anti-Attack at System-Level Protection

Gao

Zhao

2018

Sensors

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“…On the basis of the analysis of (22) and (28), is a characterization function comprising a filling factor and permittivity . For two rings, the characterization function curve comprises , , , and for the first ring detection.…”

Section: Solutions For Two Unknown Permittivities or Thicknesses Omentioning

confidence: 99%

“…In planar resonator methods, the MUT can usually be considered a part of the substrate, and the resonance frequency is measured to extract parameters. A viable and nondestructive solution that simultaneously and accurately measures the individual layer thicknesses and permittivity during manufacturing stack-up and regular maintenance is required [22]- [24]. Simultaneously and independently measuring the coating layer thickness and percentage of silicone relative to an iron oxide filler (i.e., dielectric constant) in functional coating requires customized dielectric spectroscopy sensors [22].…”

Section: Introductionmentioning

confidence: 99%

“…A viable and nondestructive solution that simultaneously and accurately measures the individual layer thicknesses and permittivity during manufacturing stack-up and regular maintenance is required [22]- [24]. Simultaneously and independently measuring the coating layer thickness and percentage of silicone relative to an iron oxide filler (i.e., dielectric constant) in functional coating requires customized dielectric spectroscopy sensors [22]. Several techniques have been proposed to investigate the feasibility of this simultaneously measurement standard [24].…”

Section: Introductionmentioning

confidence: 99%

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Single-Compound Complementary Split-Ring Resonator for Simultaneously Measuring the Permittivity and Thickness of Dual-Layer Dielectric Materials

Lee

Yang

2015

IEEE Trans. Microwave Theory Techn.

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This paper presents the design and analysis of a single-compound complementary split-ring resonator (SC-CSRR) that induces two resonance frequencies for simultaneously measuring the thickness and permittivity of dual-layer dielectric structures. Two resonance frequencies were generated using two distinct embedded resonator current lengths in a single complementary split-ring resonator. These two resonance frequency responses were combined to determine the thickness and permittivity of a dual-layer dielectric sample. Methods proposed in this paper were used to analyze the equivalent permittivity relationship, and thus, determine the thickness and permittivity of the material under test. The proposed simple low-cost SC-CSRR measurement method for assessing the permittivity of materials in a compact area was experimentally analyzed and verified in experiments. The experimental results indicated that the average thickness and permittivity measurement errors were 6.26% and 4.63%, respectively, for single-layer samples, and 5.26% and 6.48%, respectively, for dual-layer samples.Index Terms-Complementary split-ring resonators (CSRR), dual-layer detection, dual rings, noninvasive detection, permittivity and thickness measurement.

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“…Different from the conventional capacitor structures, the fringing field capacitor consists of two electrodes in the same plane, and the electric field is produced in the adjacent region of electrodes. The fringing field capacitive sensors have been applied in the moisture [5], pH value [6] and thickness measurement [7] and so on. A flow measurement method based on the fringing field capacitor structure is presented in this Letter.…”

Section: Introductionmentioning

confidence: 99%

Flow measurement method based on a fringing field capacitor structure

Liu

Wang

2016

Electron. lett.

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A flow measurement method based on fringing field capacitors is proposed. Alternate annular electrodes are fabricated on the surface of the tube to constitute the capacitor structure, and the fringing field penetrates the wall to achieve the detection of fluid. The electric field between two electrodes distributes along the annular wall, which is conducive to analyse the relationship of the capacitance and the flow. The proposed measurement method is suitable for the industrial applications due to the simple structure and low cost. A water flow measurement experiment was implemented by making foil capacitor on the surface of a plastic tube.

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Measurement of Coating Thickness and Loading Using Concentric Fringing Electric Field Sensors

Cited by 21 publications

References 12 publications

Fringing Electric Field Sensors for Anti-Attack at System-Level Protection

Fringing Electric Field Sensors for Anti-Attack at System-Level Protection

Single-Compound Complementary Split-Ring Resonator for Simultaneously Measuring the Permittivity and Thickness of Dual-Layer Dielectric Materials

Flow measurement method based on a fringing field capacitor structure

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