Abstract:
In a first aspect of the present invention, a method for manufacturing a flip chip package is provided comprising the steps of a) providing a chip having electrically conductive pads on an active surface thereof, b) coating at least a portion the chip with a protectant composition comprising a polymerizable component comprising a thermosetting epoxy resin, at least 50 weight percent of a substantially transparent filler having a coefficient of thermal expansion of less than 10 ppm/°C, a photoinitator, and a solvent carrier, wherein the protectant composition comprises a thixotropic index of less than 1.5, c) masking the coated chip to mask areas where vias through the protectant are desired, d) exposing the masked chip to a light source sufficient to partially crosslink the protectant composition in the unmasked areas, e) removing the uncured portions of the protectant composition thereby creating vias through the protectant composition to the electrically conductive pads on the surface of the chip, f) applying an electrically conductive material to the chip through the vias, wherein the electrically conductive material protrudes from the surface of the protectant composition, and g) heating the chip to a temperature sufficient to reflow the electrically conductive material and thermoset the protectant composition.
Abstract:
A method for assembling a microelectronic device is provided comprising the step of adhering a die to a substrate using a convex die attachment process. The convex die attachment process generally comprises a) providing a die having an underfill material thereon, b) picking up and inverting the die, c) heating the underfill until it liquefies at least slightly and forms a convex surface, and d) placing the die on a substrate.
Abstract:
A method for assembling a microelectronic device is provided comprising the step of adhering a die to a substrate using a convex die attachment process. The convex die attachment process generally comprises a) providing a die having an underfill material thereon, b) picking up and inverting the die, c) heating the underfill until it liquefies at least slightly and forms a convex surface, and d) placing the die on a substrate.
Abstract:
The present invention generally relates to a new method of polymerizing ethylene. In one embodiment, the present invention relates to compounds utilized in the polymerization of ethylene and to a synthesis/polymerization method that uses same. In another embodiment, branched polyethylene is synthesized from an ethylene monomer using, in this embodiment, at least one nickel iminophosphonamide (PN 2 ) complex. In still another embodiment, the reaction of (phenyl) (triphenylphosphine) (diphenyl-bis (trimethylsilylimino) phosphorato)-nickel with Rh(acac)(C 2 H 4 ) 2 and ethylene yield a branched polyethylene. In an alternative of this embodiment, the reaction of (phenyl) (triphenylphosphine) (methyl-bis(trimethylsilyl) amino-bis(trimethylsilylimino) phosphorato)-nickel and ethylene, with or without Ni(COD) 2 , yields a branched polyethylene.
Abstract translation:本发明一般涉及聚乙烯的新方法。 在一个实施方案中,本发明涉及用于乙烯聚合的化合物和使用其的合成/聚合方法。 在另一个实施方案中,在本实施方案中,使用至少一种镍亚氨基膦酰胺(PN 2 H 2)络合物,由乙烯单体合成支化聚乙烯。 在另一个实施方案中,(苯基)(三苯基膦)(二苯基 - 双(三甲基甲硅烷基亚氨基)磷酸酯) - 镍与Rh(acac)(C 2 H 4 H 4) 乙烯产生支链聚乙烯。 在本实施方案的替代方案中,使用(或不)Ni(COD)2 N(CO)的(苯基)(三苯基膦)(甲基 - 双(三甲基甲硅烷基)氨基 - 双(三甲基甲硅烷基亚氨基)磷酸酯) - 镍和乙烯的反应 >,得到支链聚乙烯。
Abstract:
Latent thermal initiators and protectant compositions that remain shelf stable at elevated temperatures, yet readily cure during a solder bump reflow process or other high temperature processing. The thermal initiators comprise thermally labile cation-anion pairs where the blocked cation prevents cure at low temperatures, and the unblocked cation initiates cure at high temperatures. Also provided is a method of making a preferred initiator comprising the cation [N-(4- methylbenzy!)-N,N-dimethylanalinium] and the anion [N(SO 2 CF 3 ) 2 ].
Abstract:
The present invention generally relates to a new method of polymerizing ethylene. In one embodiment, the present invention relates to compounds utilized in the polymerization of ethylene and to a synthesis/polymerization method that uses same. In another embodiment, branched polyethylene is synthesized from an ethylene monomer using, in this embodiment, at least one nickel iminophosphonamide (PN 2 ) complex. In still another embodiment, the reaction of (phenyl) (triphenylphosphine) (diphenyl-bis (trimethylsilylimino) phosphorato)-nickel with Rh(acac)(C 2 H 4 ) 2 and ethylene yield a branched polyethylene. In an alternative of this embodiment, the reaction of (phenyl) (triphenylphosphine) (methyl-bis(trimethylsilyl) amino-bis(trimethylsilylimino) phosphorato)-nickel and ethylene, with or without Ni(COD) 2 , yields a branched polyethylene.
Abstract translation:本发明一般涉及聚乙烯的新方法。 在一个实施方案中,本发明涉及用于乙烯聚合的化合物和使用其的合成/聚合方法。 在另一个实施方案中,在本实施方案中,使用至少一种镍亚氨基膦酰胺(PN 2 H 2)络合物,由乙烯单体合成支化聚乙烯。 在另一个实施方案中,(苯基)(三苯基膦)(二苯基 - 双(三甲基甲硅烷基亚氨基)磷酸酯) - 镍与Rh(acac)(C 2 H 4 H 4) 乙烯产生支链聚乙烯。 在本实施方案的替代方案中,使用(或不)Ni(COD)2 N(CO)的(苯基)(三苯基膦)(甲基 - 双(三甲基甲硅烷基)氨基 - 双(三甲基甲硅烷基亚氨基)磷酸酯) - 镍和乙烯的反应 >,得到支链聚乙烯。
Abstract:
Latent thermal initiators and protectant compositions that remain shelf stable at elevated temperatures, yet readily cure during a solder bump reflow process or other high temperature processing. The thermal initiators comprise thermally labile cation-anion pairs where the blocked cation prevents cure at low temperatures, and the unblocked cation initiates cure at high temperatures. Also provided is a method of making a preferred initiator comprising the cation [N-(4- methylbenzy!)-N,N-dimethylanalinium] and the anion [N(SO 2 CF 3 ) 2 ].