Abstract:
Provided is a thermoplastic resin composition which is excellent in platability (appearance of plating), and keeps high reflectance even after thermal aging. A thermoplastic resin composition comprising: per (A) 100 parts by weight of a crystalline thermoplastic resin having a melting point, measured by differential scanning calorimetry (DSC) at a heating rate of 10°C/min, of 250°C or above; (B) 10 to 80 parts by weight of a glass filler; (C) 1 to 30 parts by weight of a laser direct structuring additive having a reflectance at 450 nm of 25% or above; and (D) 20 to 150 parts by weight of titanium oxide.
Abstract:
Printed circuit boards have circuit layers with one or more via filled holes with copper wraps and methods of manufacturing the same. An embodiment of the present invention provides a method to enhance the consistency of the wraparound plating of through-hole vias of printed circuit boards with (requiring) via filling to provide extra reliability to the printed circuit boards and enables the designers and/or manufacturers of printed circuit boards to design and manufacture boards with relatively fine features and/or tight geometries.
Abstract:
The invention relates to a method for producing a layer that is conductive for electric current on a substrate, comprising the following method steps: a) a coating composed of a first formulation, which contains an organic binder, an aqueous or organic solvent and electrically conductive particles, is applied to the substrate, b) the substrate with the coating is subjected to a drying method stage, wherein the solvent is removed, c) the substrate with the dried coating is treated with a second formulation for autocatalytic electroless metal coating. The invention furthermore relates to a conductive structure obtainable in this way, and to a security and/or valuable document comprising such a conductive structure.
Abstract:
A device and method of heat sinking a surface mount device (SMD) component. The method includes: forming through holes in a printed circuit board (PCB), electroless plating a first copper layer in the holes, standard plating a second copper layer in the holes and surrounding surfaces of the PCB, masking and pulse plating a third copper layer in the holes, filling the holes with non-conductive material and sanding flush with the second copper layer, electroless plating a fourth copper layer on the PCB over the area of the holes, plating a fifth copper layer (or pad) on the PCB over the area of the holes, and attaching a surface mount device to the fifth copper layer.
Abstract:
A surface mount circuit board includes: an insulating substrate having through holes each extending from front to rear surfaces of the insulating substrate; high thermal conductive members each filing a different one of the though holes; lands each disposed to cover an end surface of a different one of the high thermal conductive members and also cover part of the front surface around the peripheral edge of the corresponding through hole; and heat receiving members each disposed to cover an end surface ofa different one of the high thermal conductive members and also cover part of the rear surface around the peripheral edge of the corresponding through hole. Each land may be made of solder cream filled into and flashed out of the through hole. Alternatively to the high thermal conductive members, wire rods may be fitted into the respective through holes.
Abstract:
A method of and apparatus for forming components on a substrate. The method comprise in a first step applying a surface treatment to said substrate to form a patterned area having at least some electrical conductivity; in a second step electroplating onto the patterned area by means of a tool comprising a first electrode and a source for in situ supply of electrolyte, by providing an anode current to the first electrode, causing the patterned area at least in the vicinity of the tool to function as a cathode, and passing electrolyte between said patterned area and said first electrode, thereby to deposit conductive material onto said patterned area. The apparatus implements the method. Conductive material may be built up to an extent that the component so formed approximates to the bulk properties of the conductive material. The surface treatment itself therefore is not required to create good conduction properties.
Abstract:
Printed circuit boards have circuit layers with one or more via filled holes with copper wraps and methods of manufacturing the same. An embodiment of the present invention provides a method to enhance the consistency of the wraparound plating of through-hole vias of printed circuit boards with (requiring) via filling to provide extra reliability to the printed circuit boards and enables the designers and/or manufacturers of printed circuit boards to design and manufacture boards with relatively fine features and/or tight geometries.