Patent ID: 7022464

Claim:
A method of manufacturing a printed circuit board with integral plated resistors, comprising the steps of: a) forming a circuit pattern on a surface of a metal clad laminate, which laminate comprises a polymer-based core, and leaving openings in said circuit pattern onto which a resistive material can be plated; b) coating said circuit with a resist and exposing said circuit so that the openings in the desired pattern and a portion of the metal cladding are exposed; c) conditioning and selectively activating the exposed areas of the laminate to accept plating thereon; d) stripping the resist; and e) plating the activated area with said resistive material to create an integral plated resistor, wherein the resistive material comprises an electroless nickel-phosphorus plated composition and about 10 to about 20% by weight of particles, said particles being selected from the group consisting of polytetrafluoroethylene, silicon carbide, tungsten carbide, particles that fully sinter below 170° C., and combinations of the foregoing uniformly dispersed therein, and wherein the electroless nickel-phosphorous plated composition comprises at least 9% by weight phosphorous.