摘要:
A protective coating (12) of suitable composition and thickness is applied to the inner surface of the arc tube (14) of a high-intensity, metal halide discharge lamp (10) in order to avoid a substantial loss of the metallic component of the metal halide fill and hence a substantial buildup of free halide, thereby extending the useful life of the lamp (10). A preferred lamp structure includes a fused silica arc tube (14) with a silicon coating (12). The silicon coating (12) is preferably applied to the arc tube (14) using a chemical vapor deposition process.
摘要:
Carboxy-terminated prepolymers are prepared by the reaction of a diamine, preferably an aromatic diamine, or a mixture thereof with a triamine, with a carboxy anhydride such as trimellitic anhydride and a dianhydride such as bisphenol A dianhydride. The prepolymers, or functional derivatives thereof, are then reacted with a diisocyanate or diamine, or a mixture thereof with a triisocyanate or triamine, preferably an aromatic diisocyanate, to produce copolyamideimides. The products prepared using triamines or triisocyanates are crosslinked. Other products containing alkyl or alicyclic groups attached to aromatic radicals can be oxidatively crosslinked, e.g., by heating in air.
摘要:
Present embodiments are directed to an adhesive (106) and method for assembling a chip package (100). The adhesive (106) may be used to couple a chip (108) to a substrate (102), and the adhesive (106) may include an epoxy-based dielectric material, an epoxy resin, a photoacid generator, an antioxidant, and a cold catalyst corresponding to the photoacid generator.
摘要:
A waveguide (116) fabrication method includes depositing a photodefinable copolymer material (14) comprising methyl methacrylate, tetrafluoropropyl methacrylate, and an epoxy monomer; fixing optical elements (10, 12) relative to the copolymer material; sending light through at least one of the optical elements and copolymer material towards the other; volatilizing uncured monomer. Another waveguide (116) fabrication method includes: fixing optical elements (110, 112) relative to each other, each having an optical surface (11, 13); providing a copolymer blob (114) over the optical surfaces with sufficient surface tension to result in the copolymer blob having a curved surface (15); sending light through each of the optical elements towards the curved surface and the other; volatilizing uncured monomer. An optical path fabrication method comprises: fixing optical elements (70, 76) relative to each other, each having an optical surface (71, 77); translating and rotating a mirror (78) until aligned to optimally direct light from one of the optical elements to the other; securing the aligned mirror in position.
摘要:
Epoxy resin compositions are disclosed which comprise (A) at least one silicone resin, (B) at least one epoxy resin, (C) at least one anhydride curing agent, (D) at least one siloxane surfactant, and (E) at least one ancillary curing catalyst. Also disclosed are a packaged solid state devices comprising a package, a chip (4), and an encapsulant (11) comprising a composition of the invention. A method of encapsulating a solid state device is also provided.
摘要:
An adhesive includes an epoxy resin and a hardener. The hardener includes trioxdiamine, diaminodicyclohexylmethane, toluene diamine, and bisphenol-A dianhydride.
摘要:
Epoxy resin compositions are disclosed which comprise (A) at least one silicone resin, (B) at least one epoxy resin, (C) at least one anhydride curing agent, (D) at least one siloxane surfactant, and (E) at least one ancillary curing catalyst. Also disclosed are a packaged solid state devices comprising a package, a chip, and an encapsulant comprising a composition of the invention. A method of encapsulating a solid state device is also provided.