摘要:
The present invention discloses a polymer blend of sulfonated polymer such as poly(ether ether ketone) and poly(amide imide) for use as an proton-conducting membrane. The poly(amide imide) is prepared by conducing a ring-opening and condensation reactions of diisocyanate and 1,2,4-benzenetricarboxylic anhydride (TMA). The polymer blend has a reduced methanol uptake and methanol permeability while maintaining good proton conductivity, and thus is suitable for use as a proton-conducting membrane of a fuel cell. The present invention also discloses a process for preparing the poly(amide imide).
摘要:
A method for manufacturing a substrate with surface substrates by employing photothermal effect is described. Nanoparticles on the surface of the substrate excited by a beam convert light energy to thermal energy. The surface structure on the substrate is formed through the thermal energy generated by the excited nanoparticles. The substrate with plural pores is thus formed.
摘要:
A composition for a thermal interface material is provided. The deficiencies of low thermal conductivity and high thermal resistance in the conventional thermal interface materials are resolved. The CNT-LC thermal composite structure is formed by using carbon nanotube with high thermal conductivity and liquid crystal polymer with the well-ordered structure. The thermal interface material thereby has a high thermal conductivity. The added amount of carbon nanotube is less than the added amount of metal or ceramic powders in the prior art for improving the dispersion process. The CNT-LC thermal composite structure and the phase change resin are compatible without phase separation. The thermal interface material has a phase change temperature about 45˜75° C. Any holes, gaps and dents on the surface of device are filled at the normal operating temperature of device to reduce the thermal resistance of the entire device.
摘要:
An encapsulation composition for pressure signal transmission including a flexible and low modulus epoxy resin as a substance in combination with plastic balls with pressure signal transmission properties as filler is provided. Therefore, the pressure signal is transmitted by utilizing the property of easy deformation of the flexible epoxy resin under pressure. And the effect of signal transmission is enhanced by the contact between plastic balls. The encapsulation composition is used in a sensor for transmitting pressure signals. The encapsulation composition is hydrophobic, so an electronic device of the sensor can be protected against moisture or water to extend its lifetime. Compared with traditional sensors using liquid for transmitting pressure signal, this sensor using solid encapsulation composition has advantages such as easy production and processing.
摘要:
A chip package structure is disclosed. The chip package structure essentially comprises a carrier, one or more chips, a heat sink and an encapsulating material layer. At least one of the chips is flip-chip bonded and electrically connected to the carrier or another chip. There is a flip-chip bonding gap between the chip and the carrier or other chips. A heat sink is positioned on the uppermost chip. The encapsulating material layer fills the flip-chip bonding gap as well as a gap between the uppermost chip and the heat sink. A part of the surface of the heat sink away from the upper-most chip is exposed. Furthermore, the encapsulating material layer is formed in a simultaneous molding process. For example, the chip is separated from the heat sink by a distance between 0.03˜0.2 mm, and the encapsulating material has a thermal conductivity greater than 1.2 W/m.K.
摘要:
A chip package structure and a process for fabricating the same is disclosed. The chip package structure mainly comprises a carrier, a chip and an encapsulating material layer. To fabricate the chip package, a carrier and a plurality of chips are provided. Each chip has at least an active surface with a plurality of bumps thereon. The chips and the carrier are electrically connected. An encapsulating material layer that fills the bonding gap between the chips and the carriers and covers the chips and carrier is formed. The encapsulating material layer between the chips and the carrier has a first thickness and the encapsulating material layer over the chips has a second thickness. The second thickness has a value between half to twice the first thickness.
摘要:
A modified epoxy resin composition for use in making a printed circuit board comprising: (1) a modified epoxy resin obtained by reacting (a) a low molecular weight epoxy resin having at least two epoxy groups which has the following formula, ##STR1## (b) an N-heterocyclic fatty amino chain-extending agent at least two active hydrogen atoms and represented by the formulas, ##STR2## and (c) at least one catalyst for catalyzing the reaction between components (a) and (b).
摘要:
A liquid crystal display device comprises a color filter substrate and an array substrate. An optical compensation film is disposed on the color filter substrate and/or the array substrate, wherein the optical compensation film comprises a polyimide, comprising the following formula: wherein n is an integer greater than 1, and wherein when A is cyclo-aliphatic compound, B is aromatic compound or cyclo-aliphatic compound, and when A is aromatic compound, B is cyclo-aliphatic compound.
摘要:
Disclosed are encapsulation materials including an 80 to 99.5 weight percentage (wt %) of ethylene vinyl acetate copolymers (EVA) and a 0.5 to 20 weight percentage(wt %) of a photoluminescent polymer, wherein the EVA and the photoluminescent polymers are evenly blended. The encapsulation materials can be applied to packaging solar cells, and the encapsulating structure may protect the EVA from UV damage and enhance light utilization efficiency of the solar cell.
摘要:
An organic/inorganic hybrid material is provided, including an organic polymer, and a plurality of inorganic nano-platelets, wherein the inorganic nano-platelets are self-connected or connected via a linker to constitute an inorganic platelet network. By the formation of the inorganic network structure, the hybrid materials can keep their transparency and flexibility at a high inorganic content, and exhibit greatly reduced coefficients of thermal expansion A method for fabricating the organic/inorganic hybrid material is also provided.