Abstract: As starting materials for substrates for optical storage disks, cycloolefin copolymers (COC) are produced by a polymerization process in which the polymerization is terminated at a point in time at which the molar-mass distribution M.sub.w /M.sub.n is <2.0, or COC blends are produced which are composed of a first component having M.sub.w <30,000 g/mol and M.sub.w /M.sub.n .ltoreq.2, preferably <2, and a second component having M.sub.w >15,000 g/mol and M.sub.w /M.sub.n less than/equal to 4 and greater than/equal to 2. The substrate is produced by thermal deformation either of a single COC having a molar-mass distribution M.sub.w /M.sub.n of <2 or of a blend composed of such a COC and one or more COCs having a molar-mass distribution of 2.ltoreq.M.sub.w /M.sub.n <4 and M.sub.w of between 15,000 and 250,000 g/mol.

Abstract: A substrate used for magnetic disk comprising s non-magnetic support in which a material for forming pits is formed on the surface, wherein the material for forming the surface pits comprises a low melting metal and has an island structure discontinuous in the direction within the plane at the surface of the non-magnetic support, thereby enabling to produce a magnetic disk of excellent magnetic property at high productivity, as well as a magnetic recording medium using such a substrate.

Abstract: The invention relates to a ribbon or bead for coating by torch spraying and its use For depositing a quasi-crystalline phase on a substrate. The bead or ribbon (1) comprises a core having an organic binder and a powder or a mixture of powders able to Form a quasi-crystalline alloy, said core being surrounded by an organic material sheath. It makes it possible to deposit a quasi-crystalline alloy on a substrate whilst preparing said alloy in the flame (3) of a spraying apparatus and using commercial powders of the constituents of the quasi-crystalline alloy.

Abstract: An improvement is proposed for a frame-supported pellicle for dustproof protection of a photomask, which consists of a rigid frame and a transparent plastic membrane adhesively bonded to one end surface of the frame in a slack-free fashion, used in the photolithographic patterning work for the manufacture of fine electronic parts and devices. The improvement is obtained by providing the whole surface of the pellicle frame made from an alluminum alloy with a metallic plating layer of nickel or chromium so as to completely solve the heretofore unavoidable problem by the dust particle deposition on the pellicle membrane during transportation and handling as a consequence of dust particle formation by contacting with the inner surface of the holder case by virtue of the extremely high smoothness of the metal-plated frame surface.

Abstract: A corrosion resistant Al or Al alloy material on the surface of which multi-layer deposits for improved corrosion resistance. The deposits are obtained by laminating more than five layers of unit periodic layers with a thickness of 100 .ANG. or less in which two, or three or more layers of unit deposits, comprised of specific elements, are laminated. Such multi-layer structure can prevent water, chloride and other corrosion accelerating substances from passing through the deposits and reaching the surface of the base material, thus effectively preventing the corrosion of Al or Al alloy.

Abstract: A magnetic recording medium for contact recording has a layered structure sequentially with a substrate made of an aluminum alloy having a maximum surface roughness R.sub.max between 100 .ANG. and 300 .ANG. and having no surface protrusions or unevenness higher than 760 .ANG., a magnetic layer formed thereon by sputtering through underlying layers of Tiw film and Cr film, a non-magnetic first protective film formed by sputtering, a second protective film having hard particulates with average diameter 50-300 .ANG. dispersed in an inorganic oxide film, and a lubricant film. The second protective film is formed by applying a solution containing both an organic compound and the particulates and subjecting it to a heat treatment. The medium has a maximum surface roughness of 100-300 .ANG. and no surface protrusions or unevenness high than 760 .ANG. and is usable for contact recording with a recording head having flying height of less than 760 .ANG..

Abstract: A method for manufacturing superplastic forming/diffusion bonding tools and a wide range of other aerospace parts by forming a titanium aluminide interface layer from ion vapor deposition is disclosed.

Abstract: An aluminum-stabilized superconducting wire includes a superconducting wire member obtained by burying a superconducting filament in a copper matrix and an aluminum stabilizing member covered in an outer surface of the superconducting wire member, and the aluminum stabilizing member is constituted by an aluminum alloy having a 0.2 % proof resistivity of 4 kg/mm.sup.2 or more at a very low temperature and a residual resistance ratio of 250 or more. It is preferable that the aluminum alloy contains at least one element selected from 50 to 1,000 ppm of Zn, 50 to 150 ppm of Si, 50 to 400 ppm of Ag, 50 to 300 ppm of Cu, and 30 to 2,000 ppm of Ce, and that a balance is constituted by Al and an inevitable impurity.

Abstract: A five-layered bonded metal product comprising a top layer of aluminum alloy, a second layer of aluminum, a third layer of titanium, a fourth layer of 70-30 copper-nickel, and a fifth layer of steel. The method of producing said multi-layered product comprises the step of explosive bonding. The invention also includes a transition joint between aluminum and steel comprising interlayers of titanium and copper-nickel.

Abstract: A multilayer metal-coated steel sheet comprising as a first layer a Zr coating layer formed on the surface of a steel sheet, and as a second layer an Al coating layer formed on said first layer. As another embodiment, also disclosed is a multilayer metal-coated steel sheet comprising as a first layer a Zr coating layer formed on the surface of a steel sheet, as a second layer an Al-Zr alloy coating layer containing Zr in an amount of 1% by weight to 50% by weight, formed on said first layer, and as a third layer an Al coating layer formed on said second layer.The multilayer metal-coated steel sheet of the present invention has an improved corrosion resistance, heat resistance and formability.

Abstract: Disclosed is a superconductor which has an aluminum area at the center of the cross section of the superconductor and a copper-covered multifilamentary NbTi composite conductor at the periphery parts of the cross section formed around the aluminum area, wherein the cross-sectional area ratio of (Cu+Al)/NbTi is in the range of 0.5 to 3.0 and the cross-sectional area ratio of Al/Cu is in the range of 0.05 to 0.5..

Abstract: This invention relates to Al plates suitable for automobile body panels and also relates to a method of pretreatment for painting. The features are: A Zn plating layer having 0.05.about.0.38 g/m.sup.2 of coating weight is formed on the surface of an Al plate or Al alloy plate by a displacement plating process or electroplating process. The coated Al or Al alloy plate is subjected to chemical conversion treatment with zinc phosphate under conditions to completely dissolve the zinc plating layer. This invention prevents the occurrence of filiform rusting and blistering after painting.

Abstract: A low copper concentration multilayered, device interconnect metallurgy, comprises an aluminum-copper (<2 weight percent copper) conductor having formed on one of its surfaces a layer of an intermetallic compound formed from a Group IVA metal and aluminum from the aluminum-copper conductor. The intermetallic compound is formed so as to contain only the single phase line compound of the intermetallic compound.

Abstract: A magnetic thin film recording disk includes a substrate of a hard electroless plated nickel surface that has been textured to encourage a circular anisotropic orientation of crystal growth during a pass-by sputtering in a continuous production line. A thin film chromium nucleating layer that is substantially free of any oxidation that would affect the recording properties is subsequently deposited, and then a thin film magnetic layer of a cobalt alloy, having a desired circular anisotropic crystal growth, is deposited through the sputtering process. The resulting magnetic thin film recording disk is then coated with a thin film of a carbon protective material.

Abstract: A sputtered low copper concentration multilayered, device interconnect metallurgy structure is disclosed herein. The interconnect metallization structure comprises a sputtered aluminum-copper (<2) weight percent copper conductor. In the preferred embodiment, the AlCu conductor has formed on one or both of its surfaces a layer of an intermetallic compound formed from a Group IVA metal and aluminum. The Group IVA metal is deposited by sputtering. Optionally, onto said top intermetallic layer is further deposited a non-reflective, non-corrosive, etch-stop, capping layer.

Abstract: A high-coercivity thin-film magnetic recording medium, and method of producing the medium, is disclosed. The medium has a sputtered chromium underlayer, preferably about 300-1,000 .ANG. thick, and a sputtered magnetic layer, preferably about 200-800 .ANG. thick, composed of an alloy containing between 70-80% cobalt, 10-20% chromium, 3-20% platinum, and 2-10% tantalum, formed on the chromium underlayer. The medium is characterized by high coercivity, resolution, amplitude and loop squareness value, and low bit shift.

Abstract: In accordance with the present invention, there are provided information recording media having a substrate and thereon a recording layer and a metallic layer, wherein the metallic layer is composed of an aluminum alloy containing (i) titanium and (ii) at least one metal selected from among chromium, niobium and magnesium. The information recording media thus provided are excellent in corrosion resistance and small in dependence of the recording power on linear velocity.

Abstract: In accordance with the present invention, there are provided information recording media having a substrate and thereon a recording layer, and a metallic layer composed of an aluminum alloy containing at least hafnium. The information recording media provided are excellent in corrosion resistance and also small in dependence of the recording power on linear velocity.

Abstract: A porous metal supporting a composite portion of an aluminum alloy is formed by means of pressing a pair of surfaces thereof, and then chromium is cemented by diffusion before the molten aluminum alloy is penetrated thereinto. Thus, not only the mechanical strength of the interface between the aluminum alloy and the porous metal, but also the wear resistance of the composite portion can be improved.

Abstract: Disclosed is a surface treated steel plate for cans prepared by drawing and ironing (DI process). In order to enable the manufactured can to maintain a good weatherability and a high corrosion resistance, an Al-Sn alloy film having a thickness of 0.05 to 5.0 .mu.m is formed on at least that surface of a steel plate which faces the outside when the steel plate is drawn to have a cup shape.

Abstract: A structural component of titanium or titanium alloy is provided with a protective coating made substantially of an oxidation resistant and diffusion inhibiting base layer (2), an intermediate layer (3) forming a titanium fire inhibiting layer, and a cover layer (4) forming a passivating sealing layer. These layers are applied by various methods.

Abstract: A high-coercivity thin-film magnetic recording medium, and method of producing the medium, is disclosed. The medium has a sputtered chromium underlayer, preferably about 600-1,000 .ANG. thick, and a sputtered magnetic layer, preferably about 200-800 .ANG. thick, composed of an alloy containing between 70-80% cobalt, 10-20% chromium, 8-20% platinum, and 2-10% tantalum, formed on the chromium underlayer. The medium is characterized by high coercivity, resolution, amplitude and loop squareness value, and low bit shift.

Abstract: Disclosed herein is a multifilament superconducting wire of Nb.sub.3 Al comprising a core part of copper or copper alloy which is provided in a central portion as a stabilizing material and a peripheral part which is provided around the core part and formed by an Nb.sub.3 Al filament embedded in a matrix of copper or copper alloy, such that the ratio of copper or copper alloy forming the core part and the peripheral part to the Nb.sub.3 Al filament is at least 1 and not more than 5 in sectional area ratio and the diameter of the core part is at least 1/5 of the wire diameter.

Abstract: Disclosed is a multilayered metallurgical structure for an electronic component. The structure includes a base metallurgy which includes one or more layers of chromium, titanium, zirconium, hafnium, niobium, molybdenum, tantalum, cooper and/or aluminum. Directly on the base metallurgy is a layer of cobalt. The structure may also include a layer of noble or relatively noble metal such as gold, platinum, palladium and/or tin directly on the cobalt.

Abstract: Provided herein is an Al-Cr alloy vapor deposited product having high corrosion resistance which can be used under a corrosive environment for a long period of time on account of the outstanding corrosion resistance and heat resistance of the Al-Cr alloy vapor deposited layer.

Abstract: An interconnect (16',18', 18"), whose interlevel contacts comprise refractory (10) to refractory or refractory to semiconductor substrate (13) interfaces, comprises patterned refractory core portions (10), consisting of tungsten or molybdenum, having top portions (10a) and opposed side portions (10b), provided with sidewall spacers (32a) of aluminum, gold or copper or alloys thereof and formed on surfaces (12a) of insulating layers (12). The sidewall spacers afford lateral low resistivity cladding of the refractory portions as well as suppression of the electromigration failure modes of voiding and whiskering, while leaving the top portion of the core portions available for refractory to refractory contacts and the bottom portion of the core portions available for refractory to refractory or refractory to silicon contacts.

Abstract: Magnetic devices are disclosed which include an article comprising a substrate and a thin coating of a magnetic material, in which:(a) said substrate is a flexible, laminar material; (b) said magnetic material is an amorphous metal glass of high intrinsic magnetic permeability, with low or substantially zero magnetostriction, and with low coercivity; and (c) said thin coating of a magnetic material is not greater than 6 microns in thickness. This article can be used as, or to make, an antipilferage tag or marker. Deactivation materials and configurations are also disclosed, as well as techniques, in particular sputtering or PVD, for producing such a tag.

Abstract: Aluminum-molybdenum composite sheet is produced by assembling aluminum and molybdenum sheets to form a billet, rolling the assembled billet in a protective atmosphere at a temperature of about 100.degree. to 400.degree. C. to affect a reduction in thickness of at least about 40% to provide a bonded billet. The billet can be further reduced by hot and/or cold rolling.

Abstract: The present invention relates to a ferrous article suitable for use in devices for burning heavy and extra heavy petroleum fuels and a process for forming such an article. The article has a matrix formed from a low carbon steel and a corrosion resistant chromium-aluminum diffusion coating on at least one surface. The coating is formed by subjecting the matrix to successive aluminization and chromization pack cementation treatments.

Abstract: The invention relates to a plated steel sheet for cans which must have high workability and corrosion resistance and can prevent bimetallic corrosion and a method of manufacturing the same. The plated steel sheet is manufactured by forming an electroplated chromium layer on the surface of a steel, removing a hydrated chromium oxide layer formed on the surface of the chromium layer, and forming an aluminum plating layer, so that the electroplated chromium layer and the aluminum plating layer are stacked in direct contact with each other. Another plated steel sheet is manufactured by forming a vacuum deposited chromium layer on the surface of a steel, and forming an aluminum plating layer.

Abstract: A coated metal substrate protected against corrosion with a lubricious coating which, exclusive of lubricant, is resin-free and phosphate-free, which coating contains hexavalent-chromium, particulate metal and a lubricant.

Abstract: Diffusion aluminizing, when applied to titanium is effected with little or no activator to produce more uniform case and less etching.Workpieces are very rapidly pack-diffusion coated by using an excess of energizers in the pack, heating the retort containing the packed workpieces at a rate that brings the workpieces to diffusion-coating temperature and then completing the diffusion coating, all in less than 50 minutes, then cooling the retort.Diffusion aluminizing can also be applied to foils and powder to make pyrophoric product after leaching out much of the introduced aluminum. Powder can also be diffusion boronized. Pyrophoric boron-containing iron or nickel powder mixed with Ba(NO.sub.3).sub.2 will ignite to cause generation of large quantity of NO.sub.2 gas, and generation is improved when powdered boron and/or an oxidizer like NaClO.sub.3 is added.

Abstract: A magnetic recording medium for high density recording comprising a non-magnetic substrate, a Cr undercoat and a magnetic Ni-Cr-Co alloy thin layer formed on the substrate. The magnetic alloy thin layer has a thickness of from 400 to 1200 angstrom and a Cr content of from 3 to 17 atomic percent. As a result, improved magnetic characteristics and corrosion resistance of the medium are ensured.

Abstract: A layer of zirconium can be used as an adhesion layer between a ceramic or polyimide substrate and subsequently applied metallic layers. Following the zirconium layer, copper can be deposited followed by a reaction barrier layer and a wettable surface layer such as gold. This type of structure can be used for pin bracing, chip joining, and/or wire connections.

Abstract: Certain magnetic alloys are useful for a variety of applications including for magneto-optic memory storage media (optical disks). These magnetic alloys are difficult to protect against composition alteration through such processes as corrosion, oxidation, diffusion, etc. The invention is a multiple-layer structure which protects the magnetic alloys against diffusion as well as corrosion and oxidation without affecting performance of the magnetic alloy in the optical disk. Such magnetic memory storage devices exhibit high bit density and long life. They are erasable and inexpensive and highly advantageous for use in high-bit memory storage devices.

Abstract: A magneto optical recording medium comprising laminating a reflective layer, a dielectric undercoat layer and a hexagonal magnetoplumbite-type metal oxide magnetic layer on a substrate in order, characterized by that said magnetic layer is made an excellently C axis - orientated perpendicular magnetic film by putting the crystal misfit between said reflective layer and said dielectric undercoat layer formed thereon within .+-.30% and the crystal misfit between said dielectric undercoat layer and said hexagonal magnetoplumbite -type metal oxide magnetic layer formed thereon within .+-.30%, and thus various characteristics are widely improved.

Abstract: An antenna reflector comprising a face skin of graphite fiber reinforced epoxy (GFRE) material is coated with a layer of chromium. The chromium is then coated with aluminum and a protective coating of silicon dioxide is then deposited over the aluminum. The chromium has a thickness sufficiently thin to provide good coverage of the pores of the GFRE material and to minimize distortion causing poor bond due to differences in the coefficient of thermal expansion of the different materials in the presence of temperature cycles. The aluminum is sufficiently thick to provide good reflecting characteristics to minimize the polarizing effects of the graphite face skins.

Abstract: A method is disclosed for coating a titanium panel or foil with aluminum and amorphous silicon to provide an oxygen barrier abrogating oxidation of the substrate metal. The process is accomplished with inexpensive procedures common in materials research laboratories, i.e., electron beam deposition and sputtering. The procedures are conducive to treating foil gage titanium and result in submicron layers which virtually add no weight to the titanium. The ultra-thin coatings diffusion bond with the substrate titanium without costly heating steps and the coatings blend with the substrate titanium until separate mechanical properties are subsumed by those of the substrate without cracking or spallation. This method appreciably increases the ability of titanium to mechanically perform in high thermal environments such as those witnessed on structures of space vehicles during re-entry.

Abstract: An integrated semiconductor circuit consisting of a silicon substrate having an impurity doped circuit therein, and a layer of silicon dioxide formed on the substrate and having a contact hole therein overlying the circuit. An outer contact interconnect level composed of aluminum or an aluminum alloy provides electrical contact to the circuit. A tantalum disilicide diffusion barrier layer is disposed between the circuit and the interconnect level, with a layer of substantially pure tantalum both above and below the tantalum disilicide diffusion barrier layer.

Abstract: Aluminum silicon alloys are used as cores for highly conductive metal coated particles to be incorporated in resins for use as electromagnetic interference shielding. High temperature processing conditions are used after coating of the particles to improve internal and external corrosion resistance of gaskets and filled resins into which the particles are incorporated for shielding use.

Abstract: A thin film metal alloy medium for vertical recording has a magnetic film structure of individual films, each film being made up of a non-magnetic layer and a magnetic layer. In a preferred embodiment of the medium, each of the layers is a cobalt-chromium-tantalum (CoCrTa) alloy, the tantalum concentration being varied in the different layers in order to provide either the non-magnetic or the magnetic properties to the layers. The medium also includes a soft magnetic underlayer film structure between the substrate and the magnetic film structure to provide a magnetic flux return path. Each film in the underlayer film structure comprises a CoCrTa non-magnetic layer and a CoCrTa magnetic layer, each magnetic layer being sufficiently thin such that the underlayer film structure exhibits in-plane magnetization with no perpendicular magnetic anisotropy.

Abstract: Layered structures (e.g., Al-Si/Ti/Al-Si . . . ) and homogeneous alloys of aluminum and aluminum/1 at. % silicon with titanium and tungsten and other refractory metals have been found to significantly reduce hillock densities in the films when small amounts of titanium or tungsten are homogeneously added. However, the resistivity of the films can become excessive. In addition, a new type of low density hillock can form. Layering of the films eliminates all hillocks and results in films of low resistivity. Such layered and homogeneous films made with Al-Si and Ti were found to be dry etchable. Electrical shorts in test structures with two levels of metal and LPCVD SiO.sub.2 as an interlayer dielectric have been characterized and layered films using Al-Si and Ti gave excellent results.

Abstract: An improved cobalt-platinum (CoPt) thin film metal alloy media for horizontal magnetic recording has a coercivity substantially greater than prior CoPt thin film metal alloy media. A tungsten underlayer between the substrate and the CoPt magnetic layer improves the coercivity above that of media wiht conventional underlayers, such as chromium. The coercivity of the CoPt layer can be increased even further if the CoPt film is deposited in such a manner as to form an intermetallic compound of Co.sub.3 W in the interface region between the tungsten underlayer and the CoPt magnetic layer. The tungsten underlayer also improves the magnetic properties of the media when the magnetic layer is an alloy of cobalt-platinum-chromium (CoPtCr).

Abstract: An improved cobalt-platinum (CoPt) thin film metal alloy media for horizontal magnetic recording has a squareness greater than prior CoPt thin film metal alloy media. An underlayer of a body-centered-cubic (BCC) chromium-based alloy with a lattice cell constant greater than chromium (Cr), such as chromium-vanadium (CrV), is formed between the substate and the CoPt magnetic layer. The underlayer also improves the magnetic properties of the media when the magnetic layer is an alloy of cobalt-platinum-chromium (CoPtCr).

Abstract: A magnetic recording medium for perpendicular magnetization includes a base of a nonmagnetic material, a first magnetic layer of a soft magnetic material on a surface of the base, a second magnetic layer having perpendicular anisotropy on a surface of the first magnetic layer, the second magnetic layer being magnetized in a transverse direction thereof. The second magnetic layer is composed of a three-element alloy of cobalt, chromium, and hafnium, cobalt being a main component with chromium and hafnium added thereto.

Abstract: A structure for an electrical interconnection suitable for a semiconductor integrated circuit is made by a process utilizing selective tungsten deposition at low pressure to form an intermediate conductive layer without significantly ablating nearby insulating material.

Abstract: A zirconia-metal composite body comprises a zirconia ceramic part and a metallic part joined together, characterized in that irregularities are formed in the surface of the zirconia ceramic part coming into contact with the metallic part and the zirconia ceramic and metallic parts are joined together by brazing through the irregularities.

Abstract: A composite material sensitive to weak variations of oxygen pressure at a low temperature, of the type containing microscopic particles of an ionic conductor of oxygen ions contained in a solid solution, in tetravalent metal oxides, oxides of other metals with a valence less than four, other than the said of such a solid solution, the material contains discrete microscopic particles of an electronic conductor.

Abstract: Composite cermets having a central core of a first cermet composition and one or more surrounding layers of different cermet compositions are formed by a multi-step pressing operation, followed by sintering. A tungsten/alumina or molybdenum/alumina composite cermet is useful as an end closure for alumina arc tubes of metal halide discharge lamps.

Abstract: A reliable garnet to metal hermetic seal is obtained by metallizing the garnet with successive sputtered layers of tantalum or titanium, molybdenum or tungsten and nickel, followed by soldering or brazing the metallized garnet to a metal member.