Abstract:
A multi-metal layer interconnect tape is provided. The tape is not supported by a dielectric carrier. A thin dielectric adhesive layer separates at least two self supporting metal foil layers. In one embodiment of the invention, conductive vias electrically interconnect leads formed in a first metal foil layer with ground and power circuits formed in a second metal foil layer. The metal foil layers are in close proximity so the vias have a low aspect ratio. The vias may be readily coated with continuous film of a conductive metal and are much easier to clean than conventional vias having significantly higher aspect ratios.
Abstract:
The present invention relates to a technique for improving the adhesive properties of a metal or metal alloy material by reducing the number of bare spots and unplated regions on each treated surface of the metal or metal alloy material. The technique comprises electrolytically forming a substantially uniform metal oxide layer on at least one surface of the material, chemically converting the oxide layer into a substantially uniform layer of fresh metal, and thereafter electrolytically forming a plurality of dendritic structures on the at least one surface. The technique of the present invention has particular utility in improving the adhesive properties of wrought copper and copper alloy foils. An apparatus for performing the technique is also described.
Abstract:
The present invention relates to a system and a process for producing improved quality electrodeposited and/or treated metal or metal alloy foil to be used in electrical and electronic applications. The quality of the foil being produced and/or treated by the system is improved by providing each treatment tank in the system with a dual filtration system. The dual filtration system for each tank comprises a filter conditioning loop for substantially continuously withdrawing solution from the tank and removing particulate matter from the withdrawn solution and a system for removing surface impurities from the solution. In a first embodiment, the surface impurities removing system comprises an off-line solution filtration and replenishment system. In a second embodiment, the surface impurities removing system comprises a skimmer floating on the surface of the solution. The present invention has particular utility in systems for producing electrodeposited and/or treated copper foils.
Abstract:
We have invented a method and device for enabling users of enterprise software products to create, publish, and share reviews of enterprise software products. This useful, concrete and tangible result is accomplished through a server-hosted website accessible through the Internet. There are unique challenges with creating and sharing reviews of enterprise software products (compared to other products), and our invention solves these problems using several new and innovative methods we created, which form the basis of this application. Using this website, users of enterprise software can create a review of a product they are using or deploying, and also view reviews created by other users about the enterprise software products they are interested in. With usage, this invention becomes a global repository of enterprise software product reviews and a resource for users worldwide to share opinions and experiences to help each other evaluate, select, buy, and use enterprise software products.
Abstract:
An electrical conductor has a copper base substrate coated with a tin base coating layer. To inhibit the formation of a copper/tin intermetallic and the resultant depletion of the free, unreacted, tin utilized as an oxidation and corrosion barrier, a barrier is interposed between the substrate and the coating. In a first embodiment, the barrier is formed from multiple constituent layers, at least one of which is copper. The thickness ("y") of the copper layer is dependent on the anticipated service temperature and satisfies the equation y=(-1.52+0.0871x+0.00859 t).+-.50% where t=anticipated time at the service temperature, x=anticipated service temperature (Celsius), and y=the thickness of the copper layer in microinches. In a second embodiment, the barrier layer is formed from one or more constituent layers, at least one of which is iron or iron base.
Abstract:
There is provided a leadframe assembly for encapsulation in a polymer resin which prevents post-assembly fracture or swelling of the resin. The leadframe is coated with an adhesion enhancing layer that increases the shear stress required for delamination to in excess of about 3.4 MPa. In combination with this adhesion enhancing layer is a compliant die attach adhesive bonding an integrated circuit device to a central die attach paddle. This compliant die attach adhesive has a compliancy factor, E.multidot.a of less than 1.5 MPa/.degree.C. and a thickness of from about 0.01 mm to about 0.08 mm.
Abstract:
There is provided a composite material particularly suited for electrical and electronic applications having a metallic core with a desired surface finish. An acicular superficial coating layer having an apparent thickness of less than 275 angstroms is adjacent to at least a portion of the metallic core. The superficial coating layer is removable from the metallic core without appreciable change to the metallic core surface finish.
Abstract:
There is disclosed an aqueous chemical solution that consists essentially of zinc ions, a source of hydroxides, and silicon ions. The ratio of silicon to zinc (Si:Zn) is, by weight from about 1:5 to about 1:250. Within the ratio range, the silicon ions inhibit precipitation of zinc from the chemical solution. This is particularly useful when the chemical solution is an electrolyte for the deposition of zinc or a zinc containing compound onto a metallic structure where a critical zinc content must be maintained to impart adequate adhesion of a coated substrate to a polymer adhesive.
Abstract:
The present invention relates to an addition to tin coating solutions for inhibiting the growth of tin whiskers. The addition comprises a concentration of a metal salt selected from the group consisting of palladium salt, silver salt, nickel salt, iron salt, cadmium salt, platinum salt, gold salt, indium salt, ruthenium salt and cobalt salt. In a preferred embodiment, the metal salt addition is either a palladium salt such as palladium chloride or a silver salt such as silver sulfate.
Abstract:
There is provided an anodizable aluminum substrate having an increased breakdown voltage. The increase in breakdown voltage is achieved by selecting an appropriate aluminum alloy and appropriate processing parameters. Sealing the anodic film increases the breakdown voltage by decreasing corrosion. A preferred sealant is an epoxy cresol novolac having a low room temperature viscosity that cures to a highly cross-linked polymer.