Abstract:
Provided is a method of manufacturing a metal wiring on a substrate, including the steps of: forming a first layer containing a first material in at least part on the substrate; forming a crack in the first layer to form the first layer having the crack; and forming a second layer containing a second material in the first layer having the crack.
Abstract:
A multilayer wiring board that improves the reliability of connection at a via hole connection portion, and a method for producing the multilayer wiring board. In a multilayer wiring board comprising a plurality of metal wiring layers alternately laminated with insulating layers interposed therebetween are electrically connected to each other via a via hole plated layer, wherein a dissimilar metallic layer, made from material different from that of the metal wiring layers, is interposed between each of the metal wiring layers on the bottom surface of the via hole and the via hole plated layer, and the dissimilar metallic layer interposed between the each of the metal wiring layers on the bottom surface of the via hole and the via hole plated layer is arranged in a concave shape on the surface of the concave portion formed in the metal wiring layer on the bottom surface of the via hole.
Abstract:
A wiring substrate includes an insulating layer including inorganic fillers and resin, and a conductor layer formed on a surface of the insulating layer and having a conductor pattern. The surface of the insulating layer has an arithmetic average roughness Ra in the range of 0.05 μm to 0.5 μm, the conductor layer includes a metal film formed on the surface of the insulating layer, and the inorganic fillers include a first inorganic filler including particles such that each of the particles has a portion of a surface separated from the resin and forming a gap with respect to the resin of the insulating layer and that the metal film of the conductor layer includes part formed in the gap between the first inorganic filler and the resin.
Abstract:
A method of filling a hole formed in a component carrier with copper is disclosed. The method comprises i) forming a layer of an electrically conductive material covering at least part of a surface of a wall, wherein the wall delimits the hole, and subsequently ii) covering at least partially the layer and filling at least partially an unfilled volume of the hole with copper using a plating process including a bath. Hereby, the bath comprises a concentration of a copper ion, in particular Cu2+, in a range between 50 g/L and 75 g/L, in particular in a range between 60 g/L and 70 g/L.
Abstract:
A high density region for a low density circuit. At least a first liquid dielectric layer is deposited on the first surface of a first circuitry layer. The dielectric layer is imaged to create plurality of first recesses. Surfaces of the first recesses are plated electro-lessly with a conductive material to form first conductive structures electrically coupled to, and extending generally perpendicular to, the first circuitry layer. A plating resist is applied. A conductive material is electro-plated to the first conductive structure to substantially fill the first recesses, and the plating resist is removed.
Abstract:
An interconnect structure that includes a substrate having an electrical component present therein, and a under-bump metallurgy (UBM) stack that is present in contact with a contact pad to the electrical component that is present in the substrate. The UBM stack includes a metallic adhesion layer that is direct contact with the contact pad to the electrical component, a copper (Cu) seed layer that is in direct contact with the metallic adhesion layer layer, a first nickel (Ni) barrier layer that is present in direct contact with copper (Cu) seed layer, and a layered structure of at least one copper (Cu) conductor layer and at least one second nickel (Ni) barrier layer present on the first nickel (Ni) barrier layer. A solder ball may be present on second nickel (Ni) barrier layer.
Abstract:
There is provided a method of forming a gold thin film, the method including: forming a nickel plating layer on a surface of an object through electroless nickel (Ni) plating; forming a palladium-copper mixture plating layer on the nickel plating layer through electroless plating using a palladium-copper (Pd—Cu) mixture; and forming a first gold thin film by immersing the palladium-copper mixture plating layer in a gold (Au) galvanic electrolytic liquid to replace a portion of copper (Cu) particles in the palladium-copper mixture plating layer with gold particles through a replacement reaction.
Abstract:
Disclosed is a metal-clad laminate and a method for producing a metal-clad laminate wherein adhesion between a metal layer and a thermoplastic film serving as a base material is improved, the deposition rate of a plating coat on the base material is improved, and the insulating resistance after etching is properly adjusted at the same time.The metal-clad laminate comprises a base material that is composed of a thermoplastic polymer film, a base metal layer that is provided on the surface of the base material, and an upper metal layer that is provided on the surface of the base metal layer.The base metal layer is made of a copper alloy that contains 0.05-0.21 mass % of phosphorus, and the upper metal layer is made of copper or a copper alloy.
Abstract:
A method for manufacturing a metal clad laminate having a film and a metal layer formed of a foundation layer and an upper layer includes the steps of forming the foundation layer on at least a part of a surface of the film by plating to obtain a first laminate; forming the upper layer on the first laminate by plating to obtain a second laminate; and heating the second laminate to obtain the metal clad laminate. Further, the film is a flexible thermoplastic polymer film, the foundation layer is formed of a nickel alloy, the upper layer is formed of copper, at least one of the foundation layer and the upper layer has a compression stress before the step of heating the second laminate, and the metal clad laminate shrinks in a planar direction of the film during the step of heating the second laminate.
Abstract:
[Object] To provide a metal-coated polyimide resin substrate that does not deteriorate the initial adhesion between the metal-coated polyimide resin film and the metal layer and has high adhesion after aging at 150° C. for 168 hours.[Solution] A metal-coated polyimide resin substrate in which a barrier layer is formed by a wet process after performing surface modification to one surface or both surfaces of a polyimide resin film by a wet process or a dry process or a combination thereof, a seed layer is thereafter formed by a wet process or a dry process, and a conductive film is formed on a surface layer thereof by a wet process; wherein, at the peeling surface on the conductive film layer side after the metal-coated polyimide resin substrate is subject to a 90-degree peel test, the thickness of a mixed layer of polyimide residue and barrier metal layer residue according to in-depth profiling with a time-of-flight secondary ion mass spectrometer (TOF-SIMS) is 2.60 nm or less based on Si sputter rate conversion, and peel strength retention after an aging test at 150° C. for 168 hours (peel strength after aging at 150° C. for 168 hours/initial peel strength) is 50% or higher.