Abstract: A semiconductor chip such as a cold cathode is mounted on a base plate using a conventional solder or like metallic eutectic material or conductive paste, and then secured to the base plate using an inorganic adhesive or like material, which is capable of being hardened at a temperature lower than the mounting temperature, and the bonding strength of which is not deteriorated even at higher temperatures.

Abstract: Analyst for polymerization of olefin is provided which comprises a clay mineral (a) having been modified with a compound (b) capable of introducing a cation into layer interspaces in the clay mineral; a metallocene compound (c); and an organoaluminum compound (d). This catalyst is inexpensive and yet has excellent activity for polymerization of olefin. The process for polymerization or copolymerization of olefins is also provided.

Abstract: A catalyst for olefin polymerization is provided which comprises, as the components, a) a metallocene compound, b) an ionizing ionic compound, c) an organoaluminum compound, and d) a Lewis base compound. This catalyst has a stable active species and improves productivity of an olefin polymer without deterioration of the catalytic activity the metallocene is represented by General Formula (1) or (2) where Cp-containing ligands may be Cp, fluorenyl, indenyl or tetrahydroindenyl and where the metal is a group 4 metal of the periodic table.

Abstract: There is provided a field emission electron source including (a) a substrate at least a surface of which is electrically conductive, (b) at least one conically shaped, electrically conductive emitter, the emitter being formed on the substrate, (c) an electrically insulating layer formed on the substrate for electrically insulating the substrate from a gate electrode, (d) a gate electrode formed on the electrically insulating layer, the gate electrode and the electrically insulating layer being formed with an opening in which the emitter is disposed, (e) a bonding pad formed on the electrically insulating layer and in electrical communication with the gate electrode, (f) a first metal layer formed on the bonding pad, and (g) a second metal layer formed on the first metal layer, the second metal layer having a higher melting point than that of the first metal layer.

Abstract: A catalyst for olefin polymerization is provided which comprises, as the components, a) a metallocene compound, b) an ionizing ionic compound, c) an organoaluminum compound, and d) a Lewis base compound. This catalyst has a stable active species and improves productivity of an olefin polymer without deterioration of the catalytic activity.

Abstract: A structure of a semiconductor accelerometer which includes a body having a mass, beams for supporting the mass and gauge resistors provided on the beams, upper and bottom covering members sandwiching the body so as to form apertures over and under the mass and at least one through hole provided in at least any one of said upper and bottom covering members. Preferably, the through hole is provided at a center portion of the upper covering member. A probe passes through the through hole and the mass is pressed down with the top of the probe by which a predetermined strain is caused at the beams having the gauge resistors. This permits a measurement of the characteristic of the output voltage to the variation of the mass in the vertical direction.

Abstract: Novel catalysts for polymerization of ethylene or .alpha.-olefins, comprising a metallocene, an organoaluminum compound an ionic compound, and a boron compound, or comprising an ionic metallocene, an organoaluminum compound and a boron compound. Process for polymerization of ethylene or .alpha.-olefins by use of the above catalysts.

Abstract: A transition metal organometallic compound comprising a transition metal in any one of group 3A to group 8 of the periodic table and cyclic compounds containing a heteroaom in group 5 or group 5B of the periodic table and having a cyclic structure including a .pi.-bonded portion and composed of said heteroatom and said .pi.-bonded portion, wherein said transition metal has a bond of a .pi.-binding heterocylic ligand, said heteroatom and said .pi.-bonded portion and a catalyst for polymerizing olefin comprising the above organic metal compound and an organic compound.

Abstract: A polyethylene, having 1 to 60 methyl branches and 1 to 60 hexyl or higher branches per 1000 carbon atoms, a g-value of 0.5 to 0.8, and a limiting viscosity [.eta.] of 0.005 to 20.0 dl/g as measured at 140.degree. C. in o-dichlorobenzene, and a method for producing the same by polymerizing ethylene using a catalyst system comprising a coordination nickel compound of zero- or two-valent nickel and an aminobis(imino)phosphorane represented by a general formula (I): ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same as or different from each other and are respectively n-alkyl, isoalkyl, aryl or trialkylsilyl, in the presence of .alpha.-olefin.

Abstract: A catalyst for polymerization of olefin is provided which comprises (A) a metallocene compound, (B) an organoaluminum compound, and (C) a metal borate or a metal aluminate. The metallocene compound (A) is represented by the general formula (1) below: ##STR1## where Cp.sup.1 and Cp.sup.2 are cyclopentadienyl group; R.sup.1 is an alkylene, arylalkylene, dialkylsilylene, dialkylgermanylene, alkylphosphinediyl, or alkylimino group, R.sup.1 crosslinking Cp.sup.1 and Cp.sup.2 together; m is 0 or 1; M is titanium, zirconium, or hafnium; and R.sup.2 and R.sup.3 are independently hydrogen, halogen, or a hydrocarbon group, an alkoxy group, or an aryloxy group having 1 to 12 carbons, the organic aluminum compound (B) is represented by the general formula (2) below:AlR.sup.4.sub.3 (2)where each R.sup.4 is independently hydrogen, alkyl, alkoxy, or an aryl group, at least one R.sup.4 being an alkyl group, and the metal borate or the metal aluminate (C) being represented by the general formula (3):(C(L).sub.n).sub.b (A).

Abstract: A catalyst for polymerization of an olefin, is provided which contains a solid catalyst component (A) obtained by supporting a transition metal compound having formula (1): ##STR1## onto a solid inorganic compound, and then washing the solid inorganic compound with a nonaqueous solvent capable of dissolving the transition metal compound, where M is a transition metal of Group 4b; X.sup.1 and X.sup.2 are, independently, a halogen, hydrogen, an alkylalkoxy group, a saturated or unsaturated alkyl group; R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are, independently, hydrogen or a saturated or unsaturated C.sub.1-100 alkyl group; m is an integer of 1 to 6; and p and q are, independently, an integer of 0 to 4, and a catalyst component (B) containing an organic aluminum compound having formula (2): ##STR2## where 1, is an integer of 2 to 100, R.sup.5 is a C.sub.1-6 alkyl group, and/or an organic aluminum compound having formula (3) ##STR3## where 1' is an integer of 2 to 100, and R.sup.5 is a C.sub.1-6 alkyl group.

Abstract: An organometal complex is provided which is represented by the general formula (1) below: ##STR1## wherein Cp.sup.1 and Cp.sup.2 are respectively a substituted or unsubstituted cyclopentadienyl group; R.sup.1 is a group selected from alkylene groups or arylalkylene groups having 1 to 20 carbons, dialkylsilylene groups, dialkylgermanylene groups, alkylphosphinediyl groups, or alkylimino groups and R.sup.1 crosslinking Cp.sup.1 and Cp.sup.2 together; m is 0 or 1; M is selected from titanium, zirconium, and hafnium; R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen, a hydrocarbon group of 1 to 12 carbons, an alkoxyl group, or an aryloxy group; and MAO is a methylalumoxane group. This organometal complex is capable of producing selectively an olefin polymer without use of any other additional catalyst component.

Abstract: A novel catalyst for polymerization of a vinyl compound is provided which comprises, as a catalyst component (A), an organometal complex represented by General Formula (1) below: ##STR1## where Cp.sup.1 and Cp.sup.2 are independently a substituted or unsubstituted cyclopentadienyl group; R.sup.1 is a group selected from alkylene groups or arylalkylene groups having 1 to 20 carbons, dialkylsillylene groups, dialkylgermanylene groups, alkylphosphinediyl groups, or alkylimino groups, and R.sup.1 crosslinking Cp.sup.1 and Cp.sup.2 together; m is 0 or 1; M is titanium, zirconium, or hafnium; and R.sup.2, R.sup.3, and R.sup.4, are independently hydrogen, a hydrocarbon group of 1 to 12 carbons, an alkoxy group, or an aryloxy group, and a catalyst component (B) represented by the general formula (2) or (3) ##STR2## where n is an integer of from 4 to 60, and R.sup.5 is a hydrocarbon group. A process for producing a vinyl compound polymer which employs the catalyst defined above is also provided.

Abstract: A novel catalyst for polymerization of a vinyl compound is provided which comprises, as a catalyst component (A), an organometal complex represented by General Formula (1) below: ##STR1## where Cp.sup.1 and Cp.sup.2 are independently a substituted or unsubstituted cyclopentadienyl group; R.sup.1 is a group selected from alkylene groups or arylalkylene groups having 1 to 20 carbons, dialkylsillylene groups, dialkylgermanylene groups, alkylphosphinediyl groups, or alkylimino groups and R.sup.1 crosslinking Cp.sup.1 and Cp.sup.2 together; m is 0 or 1; M is titanium, zirconium, or hafnium; and R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen hydrocarbon group of 1 to 12 carbons, an alkoxy group, or an aryloxy group, and a catalyst component (B) represented by the general formula (2) or (3) ##STR2## where n is an integer of from 4 to 60, and R.sup.5 is a hydrocarbon group. A process for producing a vinyl compound polymer which employs the catalyst defined above is also provided.

Abstract: Polyethylene having from 1 to 60 methyl branches and from 1 to 60 hexyl or higher branches per 1,000 carbon atoms, a g-value of from 0.5 to 0.9, a limiting viscosity [.eta.] of from 0.005 to 20.0 dl/g as measured at 140.degree. C. in o-dichlorobenzene, a molecular weight distribution not larger than 3 as determined by gel-permeation chromatography (GPC), and not more than 0.2 of terminal double bond in 1,000 carbon atoms, and process for producing the same, comprising polymerizing ethylene in the presence of a catalyst composed of a coordination nickel compound of bivalent nickel, an organoaluminum compound, and an amino-bis(imino)-phosphorane represented by the general formula (I) below: ##STR1## where R.sub.1, R.sub.2, R.sub.3, and R.sub.4 may be the same or different mutually and are respectively n-alkyl, isoalkyl, aryl, or trialdylsilyl.