Abstract:
As an electroless plating technique capable of surely promoting the plating reaction without Pd substitution reaction and fastening the plating deposition, there are proposed an electroless plating method of subjecting a primary plated film (or metal film) formed on a substrate to a secondary plating (or electroless plating), characterized in that the secondary plating is carried out after a surface potential of the primary plated film is adjusted so as to be more base than such a most base surface potential that a surface current density of the primary plated film is zero in an electroless plating solution for the secondary plating, and a pretreating solution for electroless plating containing pH adjusting agent, reducing agent and complexing agent and an electroless plating bath suitable for use in this method.
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:
A compliant printed flexible circuit including a flexible polymeric film and at least one dielectric layer bonded to the polymeric film with recesses corresponding to a target circuit geometry. A conductive material is printed in at least a portion of the recesses to form a circuit geometry. At least one dielectric covering layer is printed over at least the circuit geometry. Openings can be printed in the dielectric covering layer to provide access to at least a portion of the circuit geometry.
Abstract:
The present invention includes an apparatus including a thin film resistor. The thin film resistor includes a resistive component, a body, and a reactant. The resistive component includes a nickel-composite material. The body has a predetermined, sturdy shape. The body carries the resistive component. The reactant manipulates the body to enable the resistive component to adhere to the body.
Abstract:
A laminate for use as a surface laminate in a multi-layer printed circuit board. The laminate is comprised of a film substrate (12) formed of a first polymeric material. At least one layer of a flash material (14) is applied to a first side of the film substrate. At least one layer of copper (16) is disposed on the layer of flash material. An adhesive layer (18) formed of a second polymer material has a first surface that is attached to a second side of the film substrate.
Abstract:
A method of depositing a conductive material (20) on a surface of a printed circuit board (10) includes the steps of chemically treating at least a portion of a surface of the printed circuit board, disposing a resist layer (16) over the chemically treated surface (12), depositing a conductive layer (20) in the areas which are not covered by the resist (16), stripping the resist from the surface of the printed circuit board (10), and cleaning exposed chemically treated surfaces of the printed circuit board (10) to remove contaminants from the surface of the printed circuit board (10) which were introduced in the chemically treating step.
Abstract:
A method of making a plate through hole printed circuit board, comprises the steps of: a) forming conductive circuit elements (10) on two opposed faces of a paper phenolic containing substrate (11); b) coating the substrate and circuit elements with a de-sensitising material (12); c) forming holes (13) through the substrate, each hole passing through a circuit element on each of the opposed faces of the board; d) treating the board to render the substrate exposed in the holes receptive to the action of a metallic plating solution; e) removing the de-sensitising material; f) printing an acid-resist mask (14) on to both faces of the board, the mask leaving exposed only a small area of the board surrounding each hole therethrough; and g) treating the board with an electroless nickel-plating solution to deposit nickel (15) in the holes to the desired thickness to provide an electrical connection through each hole between two opposed conductive circuit elements.
Abstract:
A method of making a plate through hole printed circuit board, comprises the steps of: a) forming conductive circuit elements (20) on two opposed faces of a non-conductive substrate (21); b) coating the substrate and circuit elements with a de-sensitising material (22); c) forming holes (23) through the substrate, each hole passing through a circuit element on each of the opposed faces of the board; d) treating the board to render the substrate exposed in the holes receptive to the action of a metallic plating solution; e) removing the de-sensitising material; and f) treating the board with a metallic plating solution to deposit conductive metal (24) in the holes to the desired thickness to provide an electrical connection through each hole between two opposed conductive circuit elements. This may be in two stages, with an initial thin layer of copper being deposited, followed by a main layer of nickel to the desired thickness.
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.