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This work aims to develop a multifunctional PMMA/CoFe2O4 polymeric film of low loss dielectric constant, high magnetic properties, and perceptible terahertz shielding effectiveness. Pure cobalt ferrite magnetic nanoparticles (CoFe2O4 MNPs) were prepared by a facile‐modified solution deposition method. Then, the nanoparticles were loaded to poly (methyl methacrylate) of different ratios (x = 0, 5,...
With continuing demands on increasing die size and device density, underfills are widely used in flip-chip and ball-grid array packages for improvement of reliability. Fracture of the underfill/die interfaces is often observed, particularly at the die corners under a humid environment, raising serious reliability concerns. Moisture uptake can also increase the dielectric constant of underfill materials...
The optical and dielectric properties of prepared polyvinychloride/atactic polymethylmethacrylate (PVA/α-PMMA) blends are studied as a function of applied field frequency and PMMA content. The observed optical energy gaps and the energy gap tails were determined from the measured absorption spectra. It was found that the applied frequency and the α-PMMA concentration have some effects on the physical...
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