Abstract: The present invention describes a disk drive and a thin film magnetic disk with improved recording performance of a magnetic medium having a thin seed layer material consisting of a CrTi alloy between the underlayer and the substrate. The seed layer thickness should be between 5-150.ANG. with 5-30.ANG. being preferable. The percentage of Ti should be greater than 5 at % with recording performance of the magnetic medium improving with increased percentage of Ti. The addition of Ti to Cr, increases the operable thickness range for the seed layer and, thereby, improves the manufacturability.

Abstract: Bearings are described having composite overlay coatings. The composite overlay coating comprises an electro co-deposited soft metallic matrix having incorporated therein from 0.05 to 2 wt % of a hard metal oxide, said material exhibiting a Vickers hardness (Hv) of from at least 300 to in excess of 600.

Abstract: A method for manufacturing a magnetic disk comprises the step of depositing a metallic layer on a glass substrate and laser texturing the metallic layer. The magnetic disk is then completed by deposition of (a) an underlayer such as Cr or sputtered NiP, (b) a magnetic layer such as a Co or Fe alloy, and (c) a protective overcoat such as ZrO.sub.2, carbon or hydrogenated carbon. By providing the above-mentioned metallic layer, laser texturing can now be used in conjunction with glass substrates.

Abstract: A magnetic recording medium comprising: a non-magnetic substrate;a Co-based alloy magnetic layer (ML); and a non-magnetic Cr-based underlayer position between said magnetic layer and said substrate, compatibly provided with a high S/N and a high coercive force, and an intermediate layer (IL), formed of a Co-based alloy having the hcp structure, which is positioned between the magnetic layer and the non-magnetic underlayer, said intermediate layer having a ratio R=(BsIL*IL)/(BsML*ML), which is the product (BsIL*IL) of the saturation magnetic flux density (BsIL) of the Co-based alloy which constitutes said intermediate layer and the thickness (tIL) of the intermediate layer film to the product (BsML*ML) of the saturation magnetic flux density (BsML) of the Co-based alloy which constitutes said magnetic layer and the magnetic layer film thickness (tML) at 0.2 or less.

Abstract: A thin-film magnetic recording medium having a carbon overcoat composed of an overcoat sublayer and an overcoat surface layer is described. The overcoat surface layer is a hydrogen- or nitrogen-containing sputtered carbon layer with high wear-resistance. The overcoat sublayer functions to reduce the diffusion of nitrogen or hydrogen from the surface layer to the magnetic recording layer. Also described is a method of sputtering the nitrogen-containing surface layer in which the graphite target is attached to the target electrode by thermally conducting, electrically conducting materials.

Abstract: A magnetic-recording disk comprising a metal substrate disk having a textured annular first surface area with an outer diameter which is substantially less than the diameter of the metal substrate is disclosed herein. The metal substrate disk further has a smooth annular second surface area between the first surface area's outer diameter and the metal substrate's circumferential edge. The textured annular first surface area has a laser-etched circular pattern. Furthermore the metal disk substrate of an aluminum alloy, a titanium alloy, or an austenitic stainless steel has a thin-film coating selected from the group consisting of nitrides, carbides, or borides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum or tungsten.

Abstract: A magnetic disc according to this invention is of a structure in which underlying layer and magnetic layer are formed in succession on non-magnetic substrate, and one non-magnetic intermediate layer or more and one second magnetic layer or more are further stacked one after another thereon. The non-magnetic intermediate layer is formed as film layer by sputtering, and film thickness calculated by film formation rate and film formation time is 0.2 nm.about.1.0 nm. Thus, with this magnetic disc, coercive force is improved. Accordingly, signals can be recorded at higher density. As a result, application to magnetic disc devices of larger memory capacity can be made.

Abstract: Proposed is a magnetic recording medium consisting of a non-magnetic substrate and a magnetic recording layer formed thereon by the method of sputtering, in which the non-magnetic substrate is a disk of single crystal silicon having a surface of the crystallographic orientation of (100), the surface roughness Rp being 40 nm or smaller. By virtue of the use of the unique material for the substrate, the magnetic recording layer is outstandingly stable as compared with conventional aluminum or glass substrates and the magnetic layer formed thereon by sputtering has a greatly improved coercive force of 1300 oersted or higher.

Abstract: A magnetic recording medium is constructed with a substrate made of glass, one or two underlayers, and a magnetic film. In order that the easy magnetization axis of the magnetic film is parallel to the magnetic film, an underlayer having an NaCl crystallographic structure is superposed on the substrate. A magnetic film made of a Co based alloy having a hexagonal close packed crystallographic structure is formed on this underlayer, putting an underlayer made of a material having a body centered cubic crystallographic structure therebetween at need. Magnetic anisotropy of the magnetic film is increased by forming grooves in a predetermined direction in a surface portion of the substrate. These grooves play a role also for defining the orientation of the underlayer made of the material having an NaCl crystallographic structure.

Abstract: A high-density longitudinal recording medium comprising a CoPtCrB alloy with a chromium content in excess of 17 atomic percent exhibits high coercivity, low noise, and high Curie temperatures. Films are prepared by sputter depositing a chromium or chromium alloy underlayer on a non-magnetic substrate. A strong [100] crystallographic orientation of the underlayer is required to achieve a low noise, high coercivity medium. This orientation is achieved by depositing the underlayer on a negatively biased substrate under high temperature, low pressure conditions. The oriented underlayer prevents the subsequently deposited CoPtCrB alloy from orienting itself in its preferred, c axis vertical orientation. The CoPtCrB alloy comprises 4 to 12 percent platinum, 18 to 23 percent chromium and 2 to 10 percent boron.

Abstract: This patent teaches a new method of roughening the surface of a magnetic recording medium in order to reduce the stiction and friction between a recording head and the medium to thereby improve mechanical reliability. During this method, the medium substrate is heated to form second phase precipitates which result in roughening of the medium surface. The medium roughness can be controlled by proper selection of the heating temperature and time and the substrate alloy. This results in improved contact-start-stop (CSS) performance of the medium. The method of the present invention allows for lower costs and potentially higher throughput than conventional texturing processes.

Abstract: A thin-film rigid disk magnetic medium is prepared having a non-magnetic substrate and a magnetic alloy layer formed on the substrate with a non-magnetic underlayer containing chromium as the main component interposed therebetween, where the magnetic alloy layer contains cobalt as the main component and not more than 8 atomic % of boron, not more than 40 atomic % of nickel, not more than 26 atomic % of chromium and not more than 10 atomic % of tantalum. Preferably, the magnetic alloy layer is formed by sputtering while a voltage relatively lower than the plasma potential is applied to the non-magnetic substrate.

Abstract: A magnetic recording medium comprising a non-magnetic substrate and a magnetic alloy layer formed on the substrate with a non-magnetic primer layer containing chromium as the main component interposed therebetween, wherein the magnetic alloy layer contains cobalt and nickel as the main components and not more than 8 atomic % of boron and has been formed by sputtering under such a condition that a negative bias voltage is applied to the non-magnetic substrate.

Abstract: A longitudinal magnetic recording medium with a good overwrite property and a small medium noise is identified by a CRP value, which is defined byCRP=[H.sub.c (R).times.H.sub.c (P)]/[H.sub.c (C)].sup.2where H.sub.c (C) is a coercive force in the recording direction, H.sub.c (R) is a coercive force in the medium plane in a direction perpendicular to the recording direction, and H.sub.c (P) is a coercive force in the direction of medium thickness. The magnetic recording medium can be a disk with a magnetic recording layer formed by physical vapor deposition or spin coating.

Abstract: First and second aluminum members are joined by the steps of(a) dissolving and removing completely the aluminum oxide layer from the surface of each of said first and second members to be joined and replacing each of the aluminum oxide layers with a layer consisting essentially of zinc;(b) plating at least one of the zinc layers with a non-alloy cadmium;(c) assembling and retaining together said first and second aluminum members so that the surfaces to be joined are held in contact with one another and placing said aluminum members in a vacuum; and(d) heating the members while in the vacuum thereby forming a bond between said first and second aluminum members.

Abstract: Zn-Mg alloy is plated by vapor deposition on the surface of metals. Since Zn and Mg are vapor-deposited as a vapor mixture of an optional ratio on the surface of metals, plated layers of excellent corrosion resistance, peeling resistance of coating film, formability, etc. can be formed. There is disclosed a method of forming uniform vapor mixtures of Zn and Mg, and vapor-depositing them on the surface of metals as the method forming the vapor-deposited layers.

Abstract: Disclosed is a multi-layered zinc-manganese alloy coating electrodeposited on sheet steel. The alloy layer closest to the surface of the sheet steel has a composition of at least 50% manganese while the composition of the other alloy layers farther removed from the surface of the sheet steel have less than 50% manganese.

Abstract: An integral solder back contact is provided over a semiconductor circuit. The solder contact includes a pair of layers which form an alloy at elevated temperatures. A semiconductor device having the integral solder back contact is mounted on the carrier and disposed at an elevated temperature which causes one of the layers to melt. The material of the other layer is dissolved in the melted layer until such melted layer has a sufficient amount of the material of the other layer dissolved therein to form an alloy which hardens. After the alloy hardens the circuit is firmly bonded to the carrier even while the carrier is exposed to the elevated temperature.

Abstract: Zn-Mg alloy is plated by vapor deposition on the surface of metals. Since Zn and Mg are vapor-deposited as a vapor mixture of an optional ratio on the surface of metals, plated layers of excellent corrosion resistance, peeling resistance of coating film, formability, etc. can be formed. There is disclosed a method of forming uniform vapor mixtures of Zn and Mg, and vapor-depositing them on the surface of metals as the method forming the vapor-deposited layers.

Abstract: An improved electric arc spray process for the deposition of reactive metals is disclosed which utilizes compressed inert gases for atomization. The improved process utilizes argon, nitrogen, carbon dioxide, sulfur hexafluoride, or mixtures thereof supplied to the arc spray gun such that the mass ratio of the wire feed rate to the gas feed rate is greater than 0.10. The process can be used to coat various substrates with metals or alloys comprising magnesium, zinc, lithium, and other reactive metals. The process is useful for the application of cathodic corrosion protective coatings on various substrates.

Abstract: The present device relates to an ornamental part utilized in watchcases, watchbands, spectacle frames, accessories and such, wherein the material of the member is heat-resisting material such as metal, ceramics, or plastic, the material being covered by a three-layer structure coating, the successively formed layers being; a layer which has gold colored titanium nitride as its main component; a layer which has gold colored zirconium nitride as its main component; and a gold or gold alloy layer formed on the outer layer.

Abstract: A magnetic recording member with a thin metallic antifriction protection overcoat formed over a magnetic layer. The overcoat is soft ductile and low stress and includes a metal selected from the group consisting of palladium, platinum, silver, gold, cadmium, indium, tin and lead or an alloy of one or more of these metals, and may include less than 20 percent by weight of antimony, bismuth, thallium or copper to improve wear resistance or impede corrosion. In one preferred embodiment the antifriction overcoat is an alloy of silver, lead and antimony formed with N layers where 10.ltoreq.N.ltoreq.40. The even layers are richer in a selected metal of the alloy than the odd layers in order to produce adjacent layers with different lattice or microstructural and associated mechanical properties so that there tends to be parallel shear between adjacent layers under shearing stress of head impact or friction.

Abstract: A novel low temperature vacuum seal and method of making same for joining a nonmetallic element, such as an optical port, to a metallic element is described which comprises first and second thin metallic layers applied to the nonmetallic element to provide substantial adhesion and solderability to the nonmetallic element, and a third metallic layer applied to the metallic element to provide solderability to the metallic element, the nonmetallic and metallic elements being joined by a layer of low temperature solder interfacing their respective solder surfaces. A further thin metallic layer may be applied to the nonmetallic element to provide substantial wetability to the solderable second layer.

Abstract: The watch case has its body fashioned of hard metal of hardness preferably greater than 1400 Vickers. The body is overlaid by a two layer coating. The chemical composition of the two layers is identical and comprises the combination of a metal and an element whose atomic number is less than 9. The first layer is deposited by CVD and the second by PVD. If the metal is titanium and the element nitrogen there is obtained on the body of the scratch proof case a perfectly adhering hard coating of gold color.

Abstract: A silver-coated electric material wherein a partial or total surface of an electroconductive or non-electroconductive substrate is provided with a coating of silver or silver alloy, having the first intermediate coating layer made of Ni, Co, Cr, Pd or their alloys and the second intermediate coating layer made of Sn, Cd, Pd, Ru or their alloys between the silver coating and the surface of the substrate, and the method of preparing the same.

Abstract: A method for the preparation of aligned eutectics as thin films is provided. The components of the eutectic are deposited in overlying planar layers on a suitable substrate to form a preform and a molten zone, having predetermined characteristics, is established and caused to traverse the preform melting and intermixing the deposited layers leaving the solidified thin film eutectic in its path.

Abstract: Method for growing HgCdTe (15) upon a CdTe substrate (5) using a HgTe source (3) and close-spaced vapor phase epitaxy (CSVPE). A processing temperature T of between 520.degree. C. and 625.degree. C. is employed over a processing time t of between approximately 1/4 and 4 hours. The thickness A of the grown HgCdTe (15) is a linear function of processing time t. The mole fraction x of cadmium in the HgCdTe (15) is a linear function of temperature T and an exponential function of the mole fraction y of mercury in the source (3). The lower the relative amount of mercury in the source (3), the greater the relative amount of mercury in the end product (15), and vice versa. Any crystal plane and any axial orientation of the CdTe substrate (5) can be used without affecting the rate of growth of the HgCdTe (15), the single crystal nature of the HgCdTe (15), or the mirror-like finish of its surface.

Abstract: This invention is directed to the formation of highly protective electroplated multi-metal coatings over an iron basis metal. The high degree of protection is obtained by the deposition of three sucessive layers of two dissimilar metal layers that form a galvanic cell in which one of the two adjacent metals is anodic to the other so that the corroding anodic electroplate will spread the attack laterally and thus prevent the corrosive media from drilling through to the base metal. The coating comprises an initial layer of sulfur free nickel followed in sucession by a sulfur containing bright nickel, cadmium, copper, sulfur free nickel, sulfur containing nickel and microporous chromium.

Abstract: Novel micro-throwing alloy undercoatings, multi-layer coatings containing a novel micro-throwing alloy undercoating and method of improving the corrosion resistance of ferrous metal articles are provided in accordance with the invention. The novel micro-throwing alloy undercoatings are applied as an initial layer over ferrous metal and comprise a layer of alloy having micro-throwing power, such as nickel-cadmium, nickel-zinc, iron-cadmium, iron-zinc, cobalt-cadmium, cobalt-zinc or a ternary or quaternary alloy containing iron, nickel or cobalt in combination with cadmium or zinc. The method comprises application, preferably by electroplating, of a layer of novel micro-throwing alloy undercoating directly over ferrous metal, optionally followed by one or more layers of metallic or organic coatings which further contribute to improved corrosion resistance.

Abstract: The mercury contact comprises a solid metal base of antimony, wetted with mercury. The method of manufacturing the mercury contact includes preparing the solid metal base by electrolytic deposition of antimony onto the substrate, and subsequently coating the antimony with a layer of mercury.

Abstract: In accordance with the present invention, a coating of cadmium applied to a container pedestal latch protuberance lowers the maximum exit force sufficiently as to be within the 2200 pound maximum in the AAR specification while the minimum exit force of 1600 pounds and the maximum container entry force of 800 pounds were also within the specification.

Abstract: A dry process high sensitivity imaging film includes a solid, high optical density and substantially opaque film of dispersion imaging material deposited on a substrate. The film of dispersion imaging material comprises a plurality of separate layers of different and substantially mutually insoluble metal components having relatively high melting points and relatively low melting point eutectics, and interfaces between said layers having relatively low melting points.

Abstract: A novel fastening means of a highly corrosion resistant nature and presenting a bright chrome-like outer appearance.

Abstract: A multi-layer plating and method are provided for improved corrosion resistance of ferrous metal substrates and articles made therefrom. The multi-layer plating comprises a metallic coating comprising a layer of zinc or cadmium and a layer of tin, each of which are preferably between 0.00001 to 0.001 inches in thickness, followed by a layer, preferably between about 0.0001 to 0.000001 inches in thickness of either chromium or a metallic chromium substitute. The method comprises plating, and preferably electroplating, the aforementioned layers of metal over an article having ferrous metal base stock to obtain improved corrosion resistance.

Abstract: A novel fastening means of a highly corrosion resistant nature and presenting a bright chrome-like outer appearance.

Abstract: The improved plastic-metal unitary composite of the invention formed by the present method, includes (a) a thin copper foil, for example, weighing about 1 or 2 ounces per square foot, one side of which has a rough irregular surface with improved bondability to plastic but increased propensity for staining, (b) a thin layer of metal selected from Cr, Al, Cd or a Cd alloy of Sn, Zn or Cu, or a mixture thereof, encapsulating the rough surface so as to decrease its staining characteristic without substantially descreasing its bondability, and (c) a plastic substrate bonded to the encapsulating layer. The rough irregular surface of the foil includes a plurality of discrete particles of copper and/or copper oxide adherent to the copper foil but detachable therefrom and embeddable in the plastic.