Abstract:
Disclosed is an electrolytic solution including an organic solvent, a lithium salt, and an additive. The additive includes maleimide compound and vinylene carbonate. The maleimide compound can be maleimide, bismaleimide, polymaleimide, polybismaleimide, maleimide-bismaleimide copolymer, or combinations thereof. The lithium battery employing the described electrolytic solution has a higher capacity of confirmation, higher cycle efficiency, and longer operational lifespan.
Abstract:
An interleaving striped capacitor substrate structure for pressing-type print circuit boards is disclosed. To meet the high-frequency, high-speed, and high-density requirements in modern electronic systems, the interleaving striped capacitor substrate structure uses several dielectric materials of different dielectric coefficients to make a dielectric layer. One dielectric layer can be stacked on another to form a multi-layered capacitor substrate so that a single capacitor substrate can provide the highest capacitance required for the decoupling capacitor to suppress high-frequency noise signals, and the lower dielectric coefficient substrate required for high-speed signal transmission. This simultaneously achieves the effects of reducing high-frequency transmission time and suppressing high-frequency noise.
Abstract:
The present invention relates to ink jet recording materials and method for making the same. The material has a gel layer formed on a base material to improve the optical density of the material and improve the printing quality of ink of pigment type. The method for forming the gel layer is to coat a first ink-receptive layer composed of high valance metallic halide, such as calcium chloride (CaCl2) or magnesium chloride (MgCl2), on the base layer, then a second ink-receptive layer composed of alginate, such as sodium alginate, potassium alginate or other compounds of alginic acid, on the first ink-receptive layer. The second and the first ink-receptive layers will react to form a gel layer during coating for absorbing ink dots and improving print quality.
Abstract:
An adhesive tape for lead-on-chip (LOC) IC applications containing a polyamide-based adhesive composition which is the reaction product from a reaction mixture of: (a) a pre-imidized polyamic acid; and (b) a bismaleimide that has been modified by a barbituric acid of a derivative of barbituric acid to become a barbituric acid modified bismaleimide. The pre-imidized polyamic acid is a reaction product from a reaction mixture that contains a polyamic acid and a cyclizing agent. The polyamide-based adhesive composition provides all the desirable heat resistance and other mechanical and dielectric characteristics. But, most significantly, its microscopic rheological properties are adjusted such that excellent contact is achieved between the resin molecules and the lead frame surface while eliminating or at least minimizing the extent of adhesive overflow, which can substantially reduce the reliability of the final IC product.
Abstract:
A heat resistant composition comprising a mixture of (a) a polyurethane or a modified polyurethane and (b) a bismaleimide oligomer, in which the bismaleimide oligomer is in an amount of about 1 to 35 percent by weight based on overall solid contents. The polyurethane is formed by reacting a diisocyanate-containing compound with a dihydroxy diol-compound. Then the polyurethane is reacted with a trimellitic anhydride, a diacid or a mixture thereof to form the modified polyurethane. The bismaleimide oligomer is formed by reacting a bismaleimide resin with a barbituric acid or a derivative thereof.
Abstract:
A process for manufacturing a high glass transition temperature printed circuit board comprising blending a modified bismaleimide resin into a modified epoxy resin is disclosed. Particularly the material is manufactured by blending a bismaleimide resin reacted with barbituric acid and its derivative thereof and an epoxy resin with an oxazolidone ring resulting from the reaction of a polyisocyanate and an epoxy resin modified with a secondary diamine and followed by curing. The resultant product has a high glass transition temperature, a good adhesion, flame retardancy, and a low bromine content.
Abstract:
A polyimide composition for use in making polyimide/copper foil laminate that does not require an adhesive layer between the polyimide substrate and the copper foil. A polyimide precursor is first prepared from a monomer composition, which comprises a dianhydride and an imidazole-containing or benzimidazole-containing compound, or mixture thereof The polyimide precursor is then coated onto a copper foil and subsequently subject to an imidization reaction to form a polyimide/copper foil laminate, which exhibits excellent peel strength and flatness while retaining all the advantageous properties that are characteristic of polyimide resins, such as excellent mechanical strength and heat and chemical resistance. Because the polyimide/copper foil laminates disclosed in the present invention are made without the need to apply an adhesive layer, the process of manufacturing the same is greatly simplified and the cost of production therefor can be substantially reduced. Furthermore, many of the problems caused by the inferior chemical and/or physical properties of the adhesive layer are completely eliminated.
Abstract:
Disclosed is an electrode assembly of a lithium secondary battery, including an anode plate, a cathode plate, a separator for separating the anode plate and the cathode plate and conducting lithium ions of an electrolyte, and a composite film disposed between the anode plate and the separator and/or between the cathode plate and the separator. The composite film includes 5 to 95 parts by weight of an inorganic clay and 95 to 5 parts by weight of an organic polymer binder.
Abstract:
A non-aqueous electrolyte including a lithium salt, an organic solvent, and an electrolyte additive is provided. The electrolyte additive is a meta-stable state nitrogen-containing polymer formed by reacting Compound (A) and Compound (B). Compound (A) is a monomer having a reactive terminal functional group. Compound (B) is a heterocyclic amino aromatic derivative as an initiator. A molar ratio of Compound (A) to Compound (B) is from 10:1 to 1:10. A lithium secondary battery containing the non-aqueous electrolyte is further provided. The non-aqueous electrolyte of this disclosure has a higher decomposition voltage than a conventional non-aqueous electrolyte, such that the safety of the battery during overcharge or at high temperature caused by short-circuit current is improved.
Abstract:
A battery electrode paste composition containing modified maleimide(s) is provided, which has an electrode active material, a conductive additive, a binder and modified maleimide(s) as dispersant. The modified maleimide as the dispersant in the battery electrode paste composition has dendrimer-like hyperbranched structures, which can form a stable complex with the electrode active material. Therefore, owing to the excellent compatibility of the modified maleimide with the solvent in the electrode paste, the storage stability of the paste is increased. Furthermore, through formation of stable bonding between the modified maleimide and the current-collecting metal substrate, the adhesive force between the electrode film and the current-collecting metal substrate is enhanced and the cycling life of the battery product is extended.