EMI Shielding Performance For Varies Frequency by Metal Plating on Mold Compound

Tai, Min Fee; Kok, Swee Leong; Mukai, Kenichiroh; Hotz, Stephan; Brooks, Patrick; Cocina, Diego Reinoso

doi:10.25046/aj0203146

Cited by 12 publications

(2 citation statements)

References 3 publications

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“…The differences between the S 11 parameters are due to the proportional relationship between the reflection losses (S 11 ) and the conductivity of the metals. The conductivity of silver is higher than that of copper, so the reflection losses of silver are greater than those of copper [24]. The curves of the S 11 parameters are relatively similar for the GS switches and the silver switches due to the presence of silver in both switches, as shown in Fig.…”

Section: Comparison Between the S 11 Parameters Of The Switchesmentioning

confidence: 83%

Quantitative and Qualitative Characterization of Coatings Added to Low Voltage Switches

Troudi

Jelassi

2022

Adv. technol. innov.

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Electroplating is one of the most important processes in the manufacturing of switches. Coating the conductive parts of switches improves their appearance and increases their durability, even in severe environments. This study proposes a non-destructive testing method to qualitatively and quantitatively characterize coatings added to the conductive parts of low voltage switches (contacts and terminals). The method is based on the injection of a high-frequency signal into a switch using the vector network analyzer (VNA). An in-depth analysis of the reflected signal is conducted to characterize the coatings. For the quantitative characterization, a comparison is made between switches that are plated with different coating thicknesses. As for the qualitative characterization, a comparison is made between switches that are manufactured with different types of metals. The results show that each switch type has an electromagnetic signature that varies according to the conductivity and the thickness of the metals used for coating.

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Section: Comparison Between the S 11 Parameters Of The Switchesmentioning

confidence: 83%

Quantitative and Qualitative Characterization of Coatings Added to Low Voltage Switches

Troudi

Jelassi

2022

Adv. technol. innov.

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“…The gadget consists of an RSPRO AFG-21225 waveform generator that allows sweeping in a frequency range of 5-20 MHz, an oscilloscope to measure the attenuation of the input signal Tektronic TDS 3052B, and brackets and shielded cables for mounting, as is shown in Figure 2. The devices were calibrated and tested using dissimilar materials to ensure correct measurement [49,50]. In addition, invariant ceramic resistance at working frequencies, whose real resistance value is similar to that of studied materials, has been used to obtain the electrical parameters with the minimum possible impact of noise and maximum sensitivity.…”

Section: Electromagnetic Conducted Signal Absorption Testmentioning

confidence: 99%

Electrical, Thermo-Electrical, and Electromagnetic Behaviour of Epoxy Composites Reinforced with Graphene Nanoplatelets with Different Average Surface Area

et al. 2022

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The influence of the average surface area of different graphene nanoplatelets (GNP) on the thermo-electrical behaviour, associated with Joule heating, and the attenuation of electromagnetic signals of epoxy composites has been studied, analysing the effect of the morphology obtained as a function of the dispersion time by ultrasonication and the GNP content added. Gravity moulding was used as the first stage in the scaling-up, oriented to the industrial manufacture of multilayer coatings, observing a preferential self-orientation of nanoparticles and, in several conditions, a self-stratification too. The increase of sonication time during the GNP dispersion provides a decrease in the electrical conductivity, due to the GNP fragmentation. Instead, the thermal conductivity is enhanced due to the higher homogeneous distribution of GNPs into the epoxy matrix. Finally, the lower surface area of GNPs reduces the thermal and electrical conductivity due to a greater separation between nanosheets. Regarding the study of the attenuation of electromagnetic waves, it has been discovered that in the frequency range from 100 Hz to 20 MHz, this attenuation is independent of the direction of analysis, the type of graphene, the sonication time, and the state of dispersion of the nano-reinforcement in the matrix. Furthermore, it has also been observed that the conservation of the constant shielding values for the three types of GNPs are in a range of average frequencies between 0.3 and 3 MHz.

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Conductive water-based graphene suspension for electromagnetic interference shielding via spray coating on SiP module

Bobsin,

Menezes Kerber,

Fernandes

et al. 2024

Progress in Organic Coatings

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EMI Shielding Performance For Varies Frequency by Metal Plating on Mold Compound

Abstract: Conformal metalization on mold compound offers new possibility for

Cited by 12 publications

References 3 publications

Quantitative and Qualitative Characterization of Coatings Added to Low Voltage Switches

Quantitative and Qualitative Characterization of Coatings Added to Low Voltage Switches

Electrical, Thermo-Electrical, and Electromagnetic Behaviour of Epoxy Composites Reinforced with Graphene Nanoplatelets with Different Average Surface Area

Conductive water-based graphene suspension for electromagnetic interference shielding via spray coating on SiP module

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