Abstract: A semiconductor package including a leadframe has a plurality of leads, and a semiconductor die including bond pads attached to the leadframe with the bond pads electrically coupled to the plurality of leads. The semiconductor die includes a substrate having a semiconductor surface including circuitry having nodes coupled to the bond pads. A mold compound encapsulates the semiconductor die. The mold compound is interdigitated having alternating extended mold regions over the plurality of leads and recessed mold regions in between adjacent ones of the plurality of leads.

Abstract: Disclosed is a method of producing an electrically conductive polymer composite comprising a general-purpose resin layer and an electrically conductive layer, wherein the conductive layer is formed on at least one surface of the general-purpose resin layer, the method comprising the steps of forming the conductive layer on at least one internal surface of a mold, introducing into the mold a raw solution of the general-purpose resin comprising a monomer polymerizable without condensation reaction, and subjecting said monomer to polymerization in said mold to provide the general-purpose resin layer.

Abstract: The present invention provides an impact resistant Fresnel lens comprising a resin which is obtained by polymerizing a solution consisting essentially of (a) 100 parts by weight of a monomer mixture comprising an styrenic monomer in an amount of from 60 to 99 parts by weight and a (meth)acrylic monomer of from 1 to 40 parts by weight, and (b) 1 to 50 parts by weight of a styrene-dienic copolymer based on 100 parts by weight of said monomer mixture based on 100 parts by weight of said monomer mixture. The Fresnel lens has a high refractive index and excellent transparency and impact resistance.

Abstract: A styrene resin composition comprising a crosslinked styrene resin and uniformly dispersed therein an uncrosslinked resin capable of being extracted with an organic solvent, the amount of the uncrosslinked resin being from 3 to 50% by weight based on the total amount of the composition; and a method of producing a molding of a styrene resin composition, which method comprises the step of subjecting to cast polymerization a liquid mixture comprising: (a) a styrene monomer in an amount of 30% by weight or more based on the total amount of the ingredients (a), (b), and (c); (b) a monofunctional monomer having one radical-polymerizable double bond in the molecule, in an amount less than 70% by weight based on the total amount of the ingredients (a), (b), and (c); (c) a polyfunctional monomer having at least two radical-polymerizable double bonds in the molecule, in an amount of from 0.

Abstract: Disclosed is a method of producing a conductive polymer composite comprising a resin layer and a conductive polymer layer formed on the resin layer, which comprises the steps of dissolving, in a monomer component (a) which is polymerizable without condensation reaction, a monomer component (b) capable of undergoing electrolytic polymerization to give at least one conductive polymer and an electrolyte (c), introducing the resulting solution into an electrolytic polymerization cell, applying a direct current voltage across the cell to electrolytically polymerize the component (b) to thereby provide the conductive polymer layer, and thereafter subjecting the component (a) to polymerization in the cell to provide the resin layer.

Abstract: The present invention provides a methacrylic resin composition which comprises a mixture of 20-99% by weight of a methacrylic resin and 1-80% by weight of a methacrylic two-layer polymer comprising the following inner layer (a) and outer layer (b) and having the following requirements (c)-(e):(a) the inner layer being obtained by polymerizing 90-99.9% by weight of a monofunctional monomer which is mainly composed of methyl methacrylate and 0.1-10% by weight of a polyfunctional monomer having at least two carbon-carbon double bonds in one molecule,(b) the outer layer being obtained by polymerizing a monofunctional monomer mainly composed of methyl methacrylate in the presence of the inner layer,(c) the weight ratio of the inner layer and the outer layer being 1:9-9:1,(d) the glass transition temperature being 50-120.degree. C., and(e) the average particle size being 200-5000 .cuberoot..This composition is excellent in processability, heat distortion resistance, mechanical properties and solvent resistance.

Abstract: A catalyst system comprising(A) a halogen compound of trivalent titanium,(B) an organo-aluminum compound of the formula,R.sub.3-(m+n) AlY.sub.m X.sub.nwhereinY is a group having at least one of oxygen, nitrogen, sulfur and phosphorus atoms linked to the aluminum atom, R is a hydrogen atom, an alkyl having 1 to 18 carbon atoms, an alkenyl having 2 to 18 carbon atoms, a cycloalkyl having 3 to 18 carbon atoms, an aryl having 6 to 18 carbon atoms, or an aralkyl having 7 to 18 carbon atoms,X is a halogen atom, and m and n are numbers satisfying the equations, 0<m<1, 0.ltoreq.n<2, 0<m+n.ltoreq.2, and(C) an electron-donor, and a method for producing an olefin polymer which comprises polymerizing olefins using said catalyst system. According to this method, highly crystalline olefin polymers having a broad melecular weight distribution can be produced.

Abstract: There is disclosed herein an optical disk substrate comprising a copolymer produced by polymerizing 50 to 65% by weight of methyl methacrylate (a) units, 20 to 35% by weight of tricyclo[5.2.1.0.sup.2.6 ]deca-8-yl methacrylate (b) units, 5 to 25% by weight of cyclohexyl methacrylate (c) units and 1 to 5% by weight of acrylic ester (d) units.

Abstract: A process for the production of a thermoplastic copolymer having excellent heat distortion resistance is disclosed. The process includes heat-treating a raw copolymer comprising a vinyl monomer unit including methacrylic and/or acrylic acid units in the presence of a specific ring-closing promoter selected from basic compounds, whereby the methacrylic and/or acrylic acid unit is converted into six-membered cyclic anhydride unit. The copolymer has excellent heat distortion resistance, transparency, mechanical properties and processability, and can produce a formed product without splash on the surface. The copolymer is useful for the production of various parts, such as automobile parts, electrical parts, industrial parts, and miscellaneous goods.

Abstract: A process for producing .alpha.-olefin polymers of a high stereoregularity which comprises homopolymerizing an .alpha.-olefin having 3 to 10 carbon atoms or copolymerizing said .alpha.-olefin with other olefins of the same group or with ethylene using a catalyst system comprising three components (A), (B) and (C):(A) a solid catalyst produced by reaction among a solid product described below, a compound group (III) comprising at least one compound having an O--C.dbd.O linkage and at least one compound having at least one member selected from C--O--H, C--O--C, C--N, C.tbd.N, N--O--C, P--O--C, P--N--C, C--S--H, C--S--C, S--O--C and P--S--C linkages, and a titanium compound having at least one titanium-halogen linkage, said solid product being prduced by reacting an organo-magnesium compound with at least one of the following halogen-containing compounds (I) and (II),(I) a halogeno-silicon compound of the formula, R.sub.n SiX.sub.

Abstract: A catalyst system prepared by mixing components (A), (B) and (C):(A) a solid titanium component prepared from an organo-magnesium compound, a silicon halide compound and/or an aluminum halide compound, an electron donor and TiCl.sub.4,(B) an organoaluminum activator, and(C) an electron donor.

Abstract: .alpha.-Olefin polymers of high stereoregularity are prepared by polymerizing the .alpha.-olefin with a catalyst prepared by mixing components (A), (B) and (C):(A) a solid titanium component prepared from an organo-magnesium compound, a silicon halide compound and/or an aluminum halide compound, an electron donor and TiCl.sub.4,(B) an organoaluminum activator, and(C) an electron donor.