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With the prohibition use of lead-solder, the reflow temperature was brought up to about 250 °C. The higher soldering temperature requires the substrate resins with better thermostability and higher glass transition temperature. The cyanate ester/epoxy composite resins are widely used in high frequency substrates for their excellent performance, such as low dielectric constant, low water absorption,...
With the prohibition use of lead-solder, the reflow temperature was brought up to about 250 °C. The higher soldering temperature requires the substrate resins with better thermostability and higher glass transition temperature. The cyanate ester/epoxy composite resins are widely used in high frequency substrates for their excellent performance, such as low dielectric constant, low water absorption,...
The main hurdle for the wide use of Ag-filled isotropically conductive adhesives (ICAs) is the high cost of Ag fillers. Copper can be a promising candidate for conductive metallic filler due to its low cost, high electrical conductivity and improved electro-migration performance compared to Ag. But the oxidation of copper dramatically increases the resistivity of copper-filled ICAs which considerably...
A new kind of BCB-functionalized monomer is synthesized through imidization between 4-aminoBCB and siloxane-containing dianhydride. The synthesized BCB monomer exhibits an excellent solubility in organic solvents such as ethanol, acetone and dichloromethane etc. At elevated temperature, the monomer is converted into highly cross-linked resins via ring opening reaction. The curing kinetic parameters,...
Concerning the hazard to human and environment by lead, the lead-free solders and the electrically conductive adhesives (ECAs) have been considered as the most promising alternatives of the tin-lead solder. Electrically conductive adhesives offer numerous advantages compared to conventional solder technology such as environmental friendliness, mild processing conditions, low stress on the substrates,...
In order to accommodate environmental considerations, the environmentally friendly and biocompatible materials become increasingly important and attract a lot of research interest in recent years, while application of biocompatible materials are still in its infancy. In this paper, the biochemical building blocks, amino acid is used as a novel environmentally benign and biologically compatible curing...
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