An investigation of fundamental factors influencing the permittivity of composite for embedded capacitor

Ogitani, S.; Bidstrup-Allen, S.A.; Kohl, Paul A.

doi:10.1109/ectc.1999.776067

Cited by 12 publications

(8 citation statements)

References 6 publications

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“…In exceptional cases the dielectric constant of a pure polymer exceeds 10 (e.g., for poly(vinylidene fluoride) ε = 12, 1 while for cyanoethylated O- (2,3-dihydroxypropyl)cellulose ε = 30 at 1 kHz), but always remains far below the dielectric constant of ferroelectric ceramics [6,7]. In order to increase the dielectric constant of polymers, ceramic powders with high dielectric constant, such as barium titanate (BaTiO 3 ), lead magnesium niobate-lead titanate (PMN-PT) or other, were added [8][9][10][11][12]. However, even at maximum filler loading the dielectric constant of ferroelectric ceramics/polymer composites rarely exceeded 100, because the ferroelectric ceramic/polymer composites with 0-3 type of connectivity (i.e., the composites where the filler particles are distributed at random in the polymer matrix [13]) follow closely an exponential relationship between their dielectric constant and the volume fraction of the filler [8,9,14,15].…”

Section: Introductionmentioning

confidence: 99%

Polymer composites with the dielectric constant comparable to that of barium titanate ceramics

Popielarz

Chiang

2007

Materials Science and Engineering: B

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Section: Introductionmentioning

confidence: 99%

Polymer composites with the dielectric constant comparable to that of barium titanate ceramics

Popielarz

Chiang

2007

Materials Science and Engineering: B

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“…Polymer–ceramic composites have drawn great interest recently as thick film dielectric composite materials, because of their ease of processability. There has been extensive research on these ceramic‐filled dielectric composites by many research groups 1–6. Dielectric permittivity (ε) values >100 have been achieved earlier, at high ceramic loadings of above 85 vol %.…”

Section: Introductionmentioning

confidence: 99%

Dielectric behavior of three phase polyimide percolative nanocomposites

Devaraju

Lee

2006

J of Applied Polymer Sci

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Three phase ceramic-metal-plastic (cermetplas) percolative nanocomposite films were prepared using polyimide, as the matrix to prepare the composite films. Silver nanoparticles with a mean particle size of about 41 nm were prepared and used as the metal phase. Nanocomposites of barium titanate (BaTiO 3 ) particles in polyimide matrix, with silver as metallic inclusion, were formulated using effective medium theory and percolation theory. The concentration and frequency dependence of dielectric permittivity () and loss tangent (tan ␦) measurements were reported and discussed for cermetplas below the percolation threshold. Experimental results for cermetplas show that a of above 500 can be achieved below the percolation.

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“…To achieve a good dispersion of the ceramic fillers in the epoxy matrix, a phosphate ester (Byk‐w 9010, Dow Chemical) was used as the surfactant. A sample (composite I) containing 85 vol % filler loading was ball‐milled for approximately 1 day at a speed of 220 rpm to obtain a good particle dispersion 6. The viscosity of the sample was adjusted by the addition of solvents ( N ‐methylpyrrolidone).…”

Section: Methodsmentioning

confidence: 99%

Material characterization of a high‐dielectric‐constant polymer–ceramic composite for embedded capacitor for RF applications

Rao

Wong

2004

J of Applied Polymer Sci

203

117

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Embedded capacitor technology can improve electrical performance and reduce assembly cost compared with traditional discrete capacitor technology. Polymer-ceramic composites have been of great interest as embedded capacitor materials because they combine the processability of polymers with the desired electrical properties of ceramics. We have developed a novel nanostructure polymer-ceramic composite with a very high dielectric constant ( r Ϸ150, a new record for the highest reported r value of a nanocomposite) in a previous work. RF applications of embedded capacitors require that the insulating material have a high r at a high frequency (in the gigahertz range), low leakage current, high breakdown voltage, and high reliability. A set of electrical tests were conducted in this study to characterize the electrical properties of the novel high-r polymer-ceramic nanocomposite developed inhouse. The results show that this material had a fairly high r in the RF range, low electrical leakage, and high breakdown voltage. An 85°C/85% thermal humidity aging test was been performed, and it showed that this novel high-K material had good reliability. An embedded capacitor prototype with a capacitance density of 35 nF/cm 2 was manufactured with this nanocomposite with spin-coating technology. This novel nanocomposite can be used for the integral capacitors for RF applications.

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An investigation of fundamental factors influencing the permittivity of composite for embedded capacitor

Cited by 12 publications

References 6 publications

Polymer composites with the dielectric constant comparable to that of barium titanate ceramics

Polymer composites with the dielectric constant comparable to that of barium titanate ceramics

Dielectric behavior of three phase polyimide percolative nanocomposites

Material characterization of a high‐dielectric‐constant polymer–ceramic composite for embedded capacitor for RF applications

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